CN105389165B - Document picture display method and device and terminal - Google Patents
Document picture display method and device and terminal Download PDFInfo
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- CN105389165B CN105389165B CN201510696302.1A CN201510696302A CN105389165B CN 105389165 B CN105389165 B CN 105389165B CN 201510696302 A CN201510696302 A CN 201510696302A CN 105389165 B CN105389165 B CN 105389165B
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- 238000003708 edge detection Methods 0.000 claims abstract description 34
- 238000013519 translation Methods 0.000 claims description 20
- 230000014616 translation Effects 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 12
- 238000010586 diagram Methods 0.000 claims description 12
- 238000000605 extraction Methods 0.000 claims description 11
- 238000005520 cutting process Methods 0.000 claims description 8
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/451—Execution arrangements for user interfaces
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/20—Image preprocessing
- G06V10/22—Image preprocessing by selection of a specific region containing or referencing a pattern; Locating or processing of specific regions to guide the detection or recognition
- G06V10/225—Image preprocessing by selection of a specific region containing or referencing a pattern; Locating or processing of specific regions to guide the detection or recognition based on a marking or identifier characterising the area
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Abstract
The invention discloses a document picture display method, which comprises the following steps: reading a document picture to be displayed; carrying out edge detection on the document picture by using an edge detection algorithm to obtain a content display area of the document picture, wherein the content display area is rectangular; translating the four boundaries of the content display area by a preset distance along the direction far away from the center of the document picture to obtain an expanded area; extracting the overlapping part of the extended area and the document picture to obtain a display picture; and displaying the display picture. The invention also discloses a document picture display device and a terminal. According to the invention, the display range of the document picture is adaptively adjusted, so that better reading experience is provided for a user.
Description
Technical field
The present invention relates to field of image processing more particularly to a kind of document image display methods, device and terminal.
Background technique
In mobile terminal when reading documents, ocr software is generally only simply to open document in a manner of picture and be in
Now give user.However during document compiling, some documents can have the blank boundary of larger area, to cause in reality
The region of appearance is smaller, and then leads to text importing in actual content region also very little, and reading to user makes troubles.Especially
When user also needed when reading interested region by manual operation the text in interested region is amplified, use
Family reading experience is poor.
Summary of the invention
In view of the above-mentioned problems, being used for the purpose of the present invention is to provide a kind of document image display method, device and terminal
Adaptive adjustment is carried out to the indication range of document picture, to improve the reading experience of user.
The embodiment of the present invention provides a kind of document image display method, includes the following steps:
Read document picture to be shown；
Edge detection is carried out to the document picture using edge detection algorithm, the content for obtaining the document picture is shown
Region, wherein the content display region is in rectangle；
Direction translation by four edges circle of the content display region along the center far from the document picture is scheduled
Distance obtains extended area；
The lap of the extended area Yu the document picture is extracted, display picture is obtained；
Show the display picture.
As an improvement of the above scheme, described that edge detection is carried out to the document picture using edge detection algorithm, it obtains
The content display region for obtaining the document picture, specifically includes:
The document picture is scanned by the way of transversal scanning from left to right, obtains the picture of first with preceding single pass
The gray value differences of vegetarian refreshments are greater than the coordinate of the pixel of preset threshold, and generate one by the coordinate and hang down with scanning direction
Straight left margin；
The document picture is scanned by the way of transversal scanning from right to left, obtains the picture of first with preceding single pass
The gray value differences of vegetarian refreshments are greater than the coordinate of the pixel of preset threshold, and generate one by the coordinate and hang down with scanning direction
Straight right margin；
The document picture is scanned by the way of longitudinal scanning from top to bottom, obtains the picture of first with preceding single pass
The gray value differences of vegetarian refreshments are greater than the coordinate of the pixel of preset threshold, and generate one by the coordinate and hang down with scanning direction
Straight coboundary；
The document picture is scanned by the way of longitudinal scanning from bottom to up, obtains the picture of first with preceding single pass
The gray value differences of vegetarian refreshments are greater than the coordinate of the pixel of preset threshold, and generate one by the coordinate and hang down with scanning direction
Straight lower boundary；
According to the region that the left margin, right margin, coboundary and lower boundary are surrounded, content display region is obtained.
As an improvement of the above scheme, the scheduled distance is 0, the extended area and the content display region phase
Together.
As an improvement of the above scheme, the scheduled distance is greater than 0, then four by the content display region
Boundary translates scheduled distance along the direction at the center far from the document picture, obtains extended area, specifically:
Four edges circle of the content display region are put down along the direction at the center far from the content display region respectively
Scheduled distance is moved, four boundaries after translation, and the region being surrounded according to the boundary after this four translations are obtained,
Obtain extended area.
As an improvement of the above scheme, the scheduled distance is greater than 0, then four by the content display region
Boundary translates scheduled distance along the direction at the center far from the document picture, obtains extended area, specifically:
Obtain the initial coordinate on four vertex of the content display region；
According to the distance that four edges circle of the content display region translate, four vertex are calculated after movement
Coordinates of targets；
The coordinates of targets is connected, a new rectangle is generated, obtains extended area.
As an improvement of the above scheme, the lap for extracting the extended area and the document picture, obtains
Show picture, comprising:
Four edges circle of the extended area are obtained at a distance from the center of the document picture and the document picture
Four edges circle are at a distance from the center of the document picture；Wherein, four edges circle be coboundary, lower boundary, left margin and
Right margin；
More corresponding boundary obtains the closer coboundary of centre distance apart from the document picture, lower boundary, the left side
Boundary and right margin；Wherein, the coboundary of the extended area is corresponding with the coboundary of the document picture, the extended area
Lower boundary is corresponding with the lower boundary of the document picture, the left margin pair of the left margin of the extended area and the document picture
It answers, the right margin of the extended area is corresponding with the right margin of the document picture；
It cuts out described in acquisition that four edges circle surround the rectangular area to be formed up and down from the document map on piece, obtains
It must show picture.
The embodiment of the present invention also provides a kind of document image display apparatus, comprising:
Reading unit, for reading document picture to be shown；
Detection unit obtains the document for carrying out edge detection to the document picture using edge detection algorithm
The content display region of picture, wherein the content display region is in rectangle；
Expanding element, for the side by four edges circle of the content display region along the center far from the document picture
To scheduled distance is translated, extended area is obtained；
Extraction unit obtains display picture for extracting the lap of the extended area Yu the document picture；
Display unit, for showing the display picture.
As an improvement of the above scheme, the detection unit, specifically includes:
First scanning element obtains first for scanning the document picture by the way of transversal scanning from left to right
A gray value differences with the pixel of preceding single pass are greater than the coordinate of the pixel of preset threshold, and generate described in a process
Coordinate and the left margin vertical with scanning direction；
Second scanning element obtains first for scanning the document picture by the way of transversal scanning from right to left
A gray value differences with the pixel of preceding single pass are greater than the coordinate of the pixel of preset threshold, and generate described in a process
Coordinate and the right margin vertical with scanning direction；
Third scanning element obtains first for scanning the document picture by the way of longitudinal scanning from top to bottom
A gray value differences with the pixel of preceding single pass are greater than the coordinate of the pixel of preset threshold, and generate described in a process
Coordinate and the coboundary vertical with scanning direction；
4th scanning element obtains first for scanning the document picture by the way of longitudinal scanning from bottom to up
A gray value differences with the pixel of preceding single pass are greater than the coordinate of the pixel of preset threshold, and generate described in a process
Coordinate and the lower boundary vertical with scanning direction；
Unit is surrounded, with the region being surrounded according to the left margin, right margin, coboundary and lower boundary, in acquisition
Hold display area.
As an improvement of the above scheme, the scheduled distance is 0, the extended area and the content display region phase
Together.
As an improvement of the above scheme, the scheduled distance is greater than 0, then the expanding element is specifically used for, and respectively will
Four edges circle of the content display region translate scheduled distance along the direction at the center far from the content display region, obtain
Four boundaries after translation, and the region being surrounded according to the boundary line after this four translations are obtained, extended area is obtained.
As an improvement of the above scheme, the scheduled distance is greater than 0, then the expanding element, comprising:
Initial coordinate acquiring unit, the initial coordinate on four vertex for obtaining the content display region；
Coordinates of targets acquiring unit, the distance for being translated according to four edges circle of the content display region calculate institute
State coordinates of targets of four vertex after movement；
Connection unit generates a new rectangle, obtains extended area for connecting the coordinates of targets.
As an improvement of the above scheme, the extraction unit, comprising:
Distance acquiring unit, for obtaining four edges circle of the extended area at a distance from the center of the document picture
And four edges circle of the document picture are at a distance from the center of the document picture；Wherein, four edges circle be coboundary,
Lower boundary, left margin and right margin；
Comparing unit is used for more corresponding boundary, obtains the closer top of centre distance apart from the document picture
Boundary, lower boundary, left margin and right margin；Wherein, the coboundary of the extended area is corresponding with the coboundary of the document picture,
The lower boundary of the extended area is corresponding with the lower boundary of the document picture, the left margin of the extended area and the document
The left margin of picture is corresponding, and the right margin of the extended area is corresponding with the right margin of the document picture；
Unit is cut, surrounds for cutting out described in acquisition four edges circle up and down from the document map on piece to be formed
Rectangular area, obtain display picture.
The embodiment of the present invention also provides a kind of terminal, including above-mentioned document image display apparatus.
Document image display method, device and terminal provided in an embodiment of the present invention, by being obtained using edge detection algorithm
The document picture content display region, then after being adjusted by the boundary to the content display region, generate most
Whole display picture.Since the size on the boundary of the display picture is adaptive generation, it is ensured that the content display area
The domain ratio shared in display is reasonable, the reading of appropriate user, to give the preferable document reading experience of user.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, attached drawing needed in embodiment will be made below
Simply introduce, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the flow diagram for the document image display method that first embodiment of the invention provides.
Fig. 2 is the schematic diagram that content display region is obtained in document picture.
Fig. 3 is a kind of schematic diagram that the gray value of the pixel of acquisition is scanned to document picture.
Fig. 4 is that a kind of schematic diagram for obtaining extended area is extended to content display region.
Fig. 5 is that another schematic diagram for obtaining extended area is extended to content display region.
Fig. 6 is the structural schematic diagram for the document image display apparatus that second embodiment of the invention provides.
Fig. 7 is a kind of structural schematic diagram of detection unit shown in fig. 6.
Fig. 8 is a kind of structural schematic diagram of expanding element shown in fig. 6.
Fig. 9 is a kind of structural schematic diagram of extraction unit shown in fig. 6.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of document image display method, device and terminal, for the display to document picture
Range is adjusted, so that user obtains preferably reading experience, is described in detail individually below.
Referring to Fig. 1, Fig. 1 is the flow diagram for the document image display method that first embodiment of the invention provides.Institute
Stating document image display method can be executed by document image display apparatus, and include at least step S101 to S105.
S101 reads document picture to be shown.
Referring to Figure 2 together, in embodiments of the present invention, the document image display apparatus can receive various documents (such as
The document of PPT or PDF format), and these documents are converted into picture format, then the picture being converted to will be split
Afterwards, at least independent document picture 100 of one page is obtained.For example, it is assumed that described document itself includes the PPT of page 10, then the document
Image display apparatus can be according to the corresponding document picture 100 of page 10 of the document structure tree.
In embodiments of the present invention, after generating the document picture 100, the document picture 100 is shown when receiving
Instruction when, the document image display apparatus reads document picture 100 to be shown.
S102 carries out edge detection to the document picture using edge detection algorithm, obtains the interior of the document picture
Hold display area, wherein the content display region is in rectangle.
As shown in Fig. 2, in embodiments of the present invention, due to that may have the blank on the boundary of partial document picture 100
Region 10 is more, and the ratio that textual display portion accounts for is smaller and causes the reading experience of user bad, thus needs to the text
The indication range processing of shelves picture 100, so that user obtains preferable reading experience.Specifically:
S1021 scans the document picture by the way of transversal scanning from left to right, obtains first and once sweeps with preceding
The gray value differences for the pixel retouched be greater than preset threshold pixel coordinate, and generate one by the coordinate and with scanning
The vertical left margin in direction.
In embodiments of the present invention, the document image display apparatus scans institute by the way of scanning from left to right first
Document picture 100 is stated, obtains the gray value of the pixel in scan path, and obtain the pixel of first with preceding single pass
Gray value differences be greater than preset threshold pixel coordinate.For example, as shown in Figure 3, it is assumed that Fig. 3 is that the document picture is shown
The gray value for one group of pixel that certain a line that device scans the document picture 100 obtains.The threshold value is set as 50, then from
Fig. 3 is it is found that the gray value differences for the pixel that the pixel and gray value that gray value is 237 are 34 are greater than the threshold value, at this point, institute
State document image display apparatus obtain gray value be 34 pixel coordinate, and generate one by the coordinate and perpendicular to
The left margin of the scanning direction.
S1022 scans the document picture by the way of transversal scanning from right to left, obtains first and once sweeps with preceding
The gray value differences for the pixel retouched be greater than preset threshold pixel coordinate, and generate one by the coordinate and with scanning
The vertical right margin in direction.
S1023 scans the document picture by the way of longitudinal scanning from top to bottom, obtains first and once sweeps with preceding
The gray value differences for the pixel retouched be greater than preset threshold pixel coordinate, and generate one by the coordinate and with scanning
The vertical coboundary in direction.
S1024 scans the document picture by the way of longitudinal scanning from bottom to up, obtains first and once sweeps with preceding
The gray value differences for the pixel retouched be greater than preset threshold pixel coordinate, and generate one by the coordinate and with scanning
The vertical lower boundary in direction.
S1025 obtains content and shows according to the region that the left margin, right margin, coboundary and lower boundary are surrounded
Region.
Referring to Fig. 2, in embodiments of the present invention, left margin that the document image display apparatus is obtained according to scanning,
The region that right margin, coboundary and lower boundary are surrounded obtains the content display region 20.
It should be noted that in other embodiments of the present invention, others can also be used in the document image display apparatus
Edge detection algorithm obtains the content display region 20, such as Sobel edge detection algorithm, Robert edge detection algorithm,
Prewitt edge detection algorithm, Laplacian edge detection algorithm, Canny edge detection algorithm etc., since these edges are examined
Method of determining and calculating is all techniques known, thus the present invention does not do specific description herein, but is calculated according to these edge detections
Method obtains the scheme of the content display region 20 also within protection scope of the present invention.
S103 translates four edges circle of the content display region in advance along the direction at the center far from the document picture
Fixed distance obtains extended area.
Referring to Figure 4 together, in embodiments of the present invention, after obtaining the content display region 20, the document map
Sheet display device also needs to be extended the content display region 20, certain in the surrounding addition of the content display region 20
The white space of size, to guarantee the reading experience of user.
Specifically, in one embodiment,
The document image display apparatus is respectively by four edges circle of the content display region 20 along far from the document
The direction at the center of picture translates scheduled distance, obtains four boundaries after translation, and according to this four translations after
The region that boundary line is surrounded obtains the extended area 30.
In another embodiment,
The document image display apparatus obtains the initial coordinate on four vertex of the content display region 20, further according to
The distance of the four edges circle translation of the content display region 20, calculates coordinates of targets of four vertex after movement,
The coordinates of targets is finally connected, a new rectangle is generated, obtains the extended area 30.
For example, using the upper left corner of the document picture 100 as coordinate origin, it is assumed that the upper left of the content display region 20
The initial coordinate at angle is (x1, y1), the initial coordinate in the upper right corner is (x2, y1), the initial coordinate in the lower left corner is (x1, y2) lower right corner
Initial coordinate be (x2, y2), and the distance of the four edges circle translation of the content display region 20 is D, four tops
The coordinates of targets of point are as follows: top left co-ordinate is (x1- D, y1- D), the coordinate in the upper right corner is (x2+ D, y1- D), lower-left angular coordinate is
(x1- D, y2+ D), the coordinate in the lower right corner is (x2+ D, y2+D).At this point, connection four coordinates of targets, generate a new square
Shape can be obtained the extended area 30.
It should be noted that the distance of the four edges circle translation of the content display region 20 can phase in above-described embodiment
Together, can also be different, the present invention is not specifically limited.
In addition, in another embodiment of the present invention, the distance of the four edges circle translation may be alternatively provided as 0, that is, exist
In this case, the extended area 30 is identical with the content display region 20, these schemes are in guarantor of the invention
Within the scope of shield.
S104 extracts the lap of the extended area Yu the document picture, obtains display picture.
Referring to Figure 4 together and extended area 30 described in Fig. 5, Fig. 4 be fully located at the document picture 100 range it
It is interior, at this point, cutting out the extended area 30 can be obtained the display picture 40.But in some implementations of the invention, institute
State document picture 100 itself blank boundary may also can be smaller, at this time the extended area 30 might have part is more than
The boundary (as shown in Figure 5) of the document picture 100, thus need to the extended area 30 and the document picture 100
Size is compared, and obtains the lap of the two, to obtain display picture 40.
Specifically, the document image display apparatus can by execute following steps obtain the extended area 30 with it is described
The lap of document picture 100:
S1041 obtains four edges circle of the extended area at a distance from the center of the document picture and the document
Four edges circle of picture are at a distance from the center of the document picture；Wherein, four edges circle are coboundary, lower boundary, a left side
Boundary and right margin.
S1042, more corresponding boundary obtain the closer coboundary of centre distance apart from the document picture, following
Boundary, left margin and right margin.
Wherein, the coboundary of the extended area is corresponding with the coboundary of the document picture, under the extended area
Boundary is corresponding with the lower boundary of the document picture, the left margin pair of the left margin of the extended area and the document picture
It answers, the right margin of the extended area is corresponding with the right margin of the document picture.
S1043, cuts out described in acquisition that four edges circle surround the rectangle to be formed up and down from the document map on piece
Region obtains display picture.
For example, as shown in figure 5,30 coboundary of extended area is apart from institute in four edges circle of the extended area 30
The distance for stating the center of document picture 100 is greater than center of the coboundary of the document picture 100 apart from the document picture 100
Distance.And the distance at the center of other lower boundaries, left margin, right margin apart from the document picture 100 is respectively less than described
The distance at center of the lower boundary, left margin, right margin of document picture 100 apart from the document picture 100.At this point, the expansion
The coboundary in exhibition section domain 30, it is described that lower boundary, left margin, the right margin of the document picture 100, which surround the region to be formed,
The lap of extended area 30 and the document picture 100, the document image display apparatus is by cutting out the overlapping
Part obtains display picture 40.
S105 shows the display picture.
In embodiments of the present invention, the document image display apparatus shows the display picture 40, and user can pass through
Picture 40 is shown described in screen reading.
It should be noted that in embodiments of the present invention, the document image display apparatus is obtaining the display picture
After 40, the display picture 40 is also saved, so that the document image display apparatus can be directly read and institute in subsequent operation
Display picture 40 is stated, without using above-mentioned cutting process.
Document image display method provided in an embodiment of the present invention, by obtaining the document map using edge detection algorithm
The content display region 20 of piece 100, then after being adjusted by the boundary to the content display region 20 generates final aobvious
Diagram piece 40.Since the size on the boundary of the display picture 40 is adaptive generation, it is ensured that the content display region
20 in display shared ratio it is reasonable, the reading of appropriate user, to give the preferable document reading experience of user.
Referring to Figure 6 together, Fig. 6 is the structural representation for the document image display apparatus that second embodiment of the invention provides
Figure.The document image display apparatus 200 can be used for executing document image display method described in any of the above-described embodiment, described
Document image display apparatus 200 includes reading unit 210, detection unit 220, expanding element 230, extraction unit 240 and display
Unit 250, in which:
The reading unit 210, for reading document picture to be shown.
Referring to Figure 2 together, in embodiments of the present invention, the document image display apparatus 200 can receive various documents
(document of such as PPT or PDF format), and these documents are converted into picture format, then the picture being converted to will be carried out
After fractionation, at least independent document picture 100 of one page is obtained.For example, it is assumed that described document itself includes the PPT of page 10, then it is described
Document image display apparatus 200 can be according to the corresponding document picture of page 10 of the document structure tree.
In embodiments of the present invention, after generating the document picture 100, when receiving the finger for showing the document picture
When enabling, the reading unit 210 reads document picture 100 to be shown.
The detection unit 220 obtains institute for carrying out edge detection to the document picture using edge detection algorithm
State the content display region of document picture, wherein the content display region is in rectangle.
Referring to Fig. 2, in embodiments of the present invention, due to that may have the blank on the boundary of partial document picture 100
Region 10 is more, and the ratio that textual display portion accounts for is smaller and causes the reading experience of user bad, thus the detection unit
220 need that the indication range of the document picture 100 is adjusted, so that user obtains preferable reading experience, specifically,
Referring to Figure 7 together, the detection unit 220 can include:
First scanning element 221 obtains for scanning the document picture by the way of transversal scanning from left to right
The gray value differences of one and the pixel of preceding single pass are greater than the coordinate of the pixel of preset threshold, and generate one and pass through institute
State coordinate and the left margin vertical with scanning direction.
Second scanning element 222 obtains for scanning the document picture by the way of transversal scanning from right to left
The gray value differences of one and the pixel of preceding single pass are greater than the coordinate of the pixel of preset threshold, and generate one and pass through institute
State coordinate and the right margin vertical with scanning direction.
Third scanning element 223 obtains for scanning the document picture by the way of longitudinal scanning from top to bottom
The gray value differences of one and the pixel of preceding single pass are greater than the coordinate of the pixel of preset threshold, and generate one and pass through institute
State coordinate and the coboundary vertical with scanning direction.
4th scanning element 224 obtains for scanning the document picture by the way of longitudinal scanning from bottom to up
The gray value differences of one and the pixel of preceding single pass are greater than the coordinate of the pixel of preset threshold, and generate one and pass through institute
State coordinate and the lower boundary vertical with scanning direction.
Unit 225 is surrounded, with the region being surrounded according to the left margin, right margin, coboundary and lower boundary, is obtained
Content display region.
It should be noted that in other embodiments of the present invention, other edge inspections can also be used in the detection unit 220
Method of determining and calculating obtains the content display region 20, such as Sobel edge detection algorithm, Robert edge detection algorithm, Prewitt
Edge detection algorithm, Laplacian edge detection algorithm, Canny edge detection algorithm etc., all due to these edge detection algorithms
It is techniques known, thus the present invention does not do specific description herein, but is obtained according to these edge detection algorithms
The scheme of the content display region 20 is also within protection scope of the present invention.
The expanding element 230, for by four edges circle of the content display region along far from the document picture
The direction at center translates scheduled distance, obtains extended area.
Referring to Figure 4 together, in embodiments of the present invention, after obtaining the content display region 20, the extension is single
Member 230 also needs to be extended the content display region 20, adds certain size in the surrounding of the content display region 20
White space, to improve the reading experience of user.
Specifically, in one embodiment,
The expanding element 230 is respectively by four edges circle of the content display region 20 along the separate document picture
The direction at center translates scheduled distance, obtains four boundaries after translation, and according to the boundary line after this four translations
The region being surrounded obtains the extended area 30.
Also referring to Fig. 8, in one embodiment,
The expanding element 230 can include:
Initial coordinate acquiring unit 231, the initial coordinate on four vertex for obtaining the content display region 20.
Coordinates of targets acquiring unit 232, the distance for being translated according to four edges circle of the content display region 20, meter
Calculate coordinates of targets of four vertex after movement.
Connection unit 233 generates a new rectangle, is extended for connecting the coordinates of targets on four vertex
Region 30.
For example, the initial coordinate acquiring unit 231 is successively using the upper left corner of the document picture 100 as coordinate origin
The initial coordinate for obtaining the upper left corner of the content display region 20 is (x1, y1), the initial coordinate in the upper right corner is (x2, y1), it is left
The initial coordinate of inferior horn is (x1, y2) lower right corner initial coordinate be (x2, y2), it is assumed that four of the content display region 20
The distance of boundary translation is D, then the coordinates of targets acquiring unit 231 is by obtaining the target on four vertex after calculating
Coordinate: top left co-ordinate is (x1- D, y1- D), the coordinate in the upper right corner is (x2+ D, y1- D), lower-left angular coordinate is (x1- D, y2+ D),
The coordinate in the lower right corner is (x2+ D, y2+D).At this point, the connection unit 233 connects the coordinates of targets on four vertex, generate
One new rectangle can be obtained the extended area 30.
It should be noted that the distance of the four edges circle translation of the content display region 20 can phase in above-described embodiment
Together, can also be different, the present invention is not specifically limited.
In addition, in another embodiment of the present invention, the distance of the four edges circle translation may be alternatively provided as 0, that is, exist
In this case, the extended area 30 is identical with the content display region 20, these schemes are in guarantor of the invention
Within the scope of shield.
The extraction unit 240 is shown for extracting the lap of the extended area Yu the document picture
Picture.
Referring to Figure 4 together and extended area 30 described in Fig. 5, Fig. 4 be fully located at the document picture 100 range it
It is interior, at this point, cutting out the extended area 30 can be obtained display picture 40.But it is in some embodiments of the invention, described
Extended area 30 might have the size (as shown in Figure 5) that part is more than the document picture 100, thus need to the extension
The size of region 30 and the document picture 100 is compared, and obtains the lap of the two, to obtain display picture 40.
Specifically, also referring to Fig. 9, the extraction unit 240 includes:
Distance acquiring unit 241, for obtaining four edges circle of the extended area and the center of the document picture
Four edges circle of distance and the document picture are at a distance from the center of the document picture.
Wherein, four edges circle include coboundary, lower boundary, left margin and right margin；
Comparing unit 242 is used for more corresponding boundary, obtain centre distance apart from the document picture it is closer on
Boundary, lower boundary, left margin and right margin.
Wherein, the coboundary of the extended area is corresponding with the coboundary of the document picture, under the extended area
Boundary is corresponding with the lower boundary of the document picture, the left margin pair of the left margin of the extended area and the document picture
It answers, the right margin of the extended area is corresponding with the right margin of the document picture.
Unit 243 is cut, four edges circle surround up and down for cutting out described in acquisition from the document map on piece
The rectangular area of formation obtains display picture.
The display unit 250, for showing the display picture.
In embodiments of the present invention, the document image display apparatus shows the display picture 40, and user can pass through
Picture 40 is shown described in screen reading.
It should be noted that in embodiments of the present invention, the document image display apparatus 200 is obtaining the display figure
After piece 40, the display picture 40 is also saved, so that the document image display apparatus 200 can directly be read in subsequent operation
It takes and the display picture 40, without using above-mentioned cutting process.
In conclusion document image display apparatus 200 provided in an embodiment of the present invention, by being obtained using detection unit 220
The content display region 20 of the document picture 100 is obtained, then by the expanding element 230 and extraction unit 240 to described interior
After the boundary of appearance display area 20 is adjusted, final display picture 40 is generated.Due to the boundary for showing picture 40
Size is adaptive generation, it is ensured that the content display region 20 ratio shared when on the screen of display is reasonable, fits
The reading of suitable user, to give the preferable document reading experience of user.
The embodiment of the present invention also provides a kind of terminal, and the terminal includes that document picture described in any of the above-described embodiment is aobvious
Showing device, wherein the terminal can also be able to be various such as smart phone, tablet computer or laptop for mobile terminal
Reading terminal etc., the present invention is not specifically limited.
Terminal provided in an embodiment of the present invention, it is aobvious by the content for obtaining the document picture 100 using detection unit 220
Show region 20, then the boundary of the content display region 20 is adjusted by the expanding element 230 and extraction unit 240
Afterwards, final display picture 40 is generated.Since the size on the boundary of the display picture 40 is adaptive generation, thus can protect
It is reasonable to demonstrate,prove the content display region 20 ratio shared when on the screen of display, the reading of appropriate user, give user compared with
Good document reading experience.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system, including the system of processor or other can be held from instruction
The instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium ", which can be, any may include, stores, communicates, propagates or pass
Defeated software is for instruction execution system, device or equipment or the dress used in conjunction with these instruction execution systems, device or equipment
It sets.The more specific example (non-exhaustive list) of computer-readable medium include the following: there is the electricity of one or more wirings
Interconnecting piece (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print the software on it or other are suitable
Medium, because can then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain the software, is then stored in computer storage.
In the above-described embodiment, multiple steps or method can be answered in memory and by suitably instructing to hold with storage
Work as understanding, each section of the invention can be realized with hardware, software, firmware or their combination.The software that row system executes
Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware
Any one of column technology or their combination are realized: having a logic gates for realizing logic function to data-signal
Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by software, the software can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
It, can also be in addition, each functional unit in each embodiment of the present invention can integrate in a processing module
It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould
Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..Although having been shown and retouching above
The embodiment of the present invention is stated, it is to be understood that above-described embodiment is exemplary, and should not be understood as to limit of the invention
System, those skilled in the art can be changed above-described embodiment, modify, replace and become within the scope of the invention
Type.
Claims (7)
1. a kind of document image display method, which comprises the steps of:
Read document picture to be shown；
Edge detection is carried out to the document picture using edge detection algorithm, obtains the content display area of the document picture
Domain, wherein the content display region is in rectangle；
Four edges circle of the content display region are translated into scheduled distance along the direction at the center far from the document picture,
Obtain extended area；
The lap of the extended area Yu the document picture is extracted, display picture is obtained；
Show the display picture；
The scheduled distance is greater than 0, then four edges circle by the content display region are along far from the document picture
The direction at center translate scheduled distance, obtain extended area, specifically:
Four edges circle of the content display region are translated along the direction at the center far from the content display region respectively pre-
Fixed distance obtains four boundaries after translation, and the region being surrounded according to the boundary after this four translations, obtains
Extended area；Or,
The scheduled distance is greater than 0, then four edges circle by the content display region are along far from the document picture
The direction at center translate scheduled distance, obtain extended area, specifically:
Obtain the initial coordinate on four vertex of the content display region；
According to the distance that four edges circle of the content display region translate, target of four vertex after movement is calculated
Coordinate；
The coordinates of targets is connected, a new rectangle is generated, obtains extended area.
2. document image display method according to claim 1, which is characterized in that described to utilize edge detection algorithm to institute
It states document picture and carries out edge detection, obtain the content display region of the document picture, specifically include:
The document picture is scanned by the way of transversal scanning from left to right, obtains the pixel of first with preceding single pass
Gray value differences be greater than preset threshold pixel coordinate, and generate one by the coordinate and vertical with scanning direction
Left margin；
The document picture is scanned by the way of transversal scanning from right to left, obtains the pixel of first with preceding single pass
Gray value differences be greater than preset threshold pixel coordinate, and generate one by the coordinate and vertical with scanning direction
Right margin；
The document picture is scanned by the way of longitudinal scanning from top to bottom, obtains the pixel of first with preceding single pass
Gray value differences be greater than preset threshold pixel coordinate, and generate one by the coordinate and vertical with scanning direction
Coboundary；
The document picture is scanned by the way of longitudinal scanning from bottom to up, obtains the pixel of first with preceding single pass
Gray value differences be greater than preset threshold pixel coordinate, and generate one by the coordinate and vertical with scanning direction
Lower boundary；
According to the region that the left margin, right margin, coboundary and lower boundary are surrounded, content display region is obtained.
3. according to claim 1 to document image display method described in 2 any one, which is characterized in that described in the extraction
The lap of extended area and the document picture obtains display picture, comprising:
Four edges circle of the extended area are obtained at a distance from the center of the document picture and four of the document picture
Boundary is at a distance from the center of the document picture；Wherein, four edges circle are coboundary, lower boundary, left margin and the right
Boundary；
More corresponding boundary, obtain the closer coboundary of centre distance apart from the document picture, lower boundary, left margin and
Right margin；Wherein, the coboundary of the extended area is corresponding with the coboundary of the document picture, the extended area it is following
Boundary is corresponding with the lower boundary of the document picture, and the left margin of the extended area is corresponding with the left margin of the document picture,
The right margin of the extended area is corresponding with the right margin of the document picture；
It cuts out described in acquisition that four edges circle surround the rectangular area to be formed up and down from the document map on piece, is shown
Diagram piece.
4. a kind of document image display apparatus characterized by comprising
Reading unit, for reading document picture to be shown；
Detection unit obtains the document picture for carrying out edge detection to the document picture using edge detection algorithm
Content display region, wherein the content display region be in rectangle；
Expanding element, for putting down four edges circle of the content display region along the direction at the center far from the document picture
Scheduled distance is moved, extended area is obtained；
Extraction unit obtains display picture for extracting the lap of the extended area Yu the document picture；
Display unit, for showing the display picture；
The scheduled distance is greater than 0, then the expanding element is specifically used for, respectively by the four edges of the content display region
Boundary translates scheduled distance along the direction at the center far from the content display region, obtains four boundaries after translation,
And the region being surrounded according to the boundary line after this four translations, obtain extended area；Or,
The scheduled distance is greater than 0, then the expanding element, comprising:
Initial coordinate acquiring unit, the initial coordinate on four vertex for obtaining the content display region；
Coordinates of targets acquiring unit, the distance for being translated according to four edges circle of the content display region calculate described four
Coordinates of targets of a vertex after movement；
Connection unit generates a new rectangle, obtains extended area for connecting the coordinates of targets.
5. document image display apparatus according to claim 4, which is characterized in that the detection unit specifically includes:
First scanning element, for scanning the document picture by the way of transversal scanning from left to right, obtain first with
The gray value differences of the pixel of preceding single pass are greater than the coordinate of the pixel of preset threshold, and generate one and pass through the coordinate
And the left margin vertical with scanning direction；
Second scanning element, for scanning the document picture by the way of transversal scanning from right to left, obtain first with
The gray value differences of the pixel of preceding single pass are greater than the coordinate of the pixel of preset threshold, and generate one and pass through the coordinate
And the right margin vertical with scanning direction；
Third scanning element, for scanning the document picture by the way of longitudinal scanning from top to bottom, obtain first with
The gray value differences of the pixel of preceding single pass are greater than the coordinate of the pixel of preset threshold, and generate one and pass through the coordinate
And the coboundary vertical with scanning direction；
4th scanning element, for scanning the document picture by the way of longitudinal scanning from bottom to up, obtain first with
The gray value differences of the pixel of preceding single pass are greater than the coordinate of the pixel of preset threshold, and generate one and pass through the coordinate
And the lower boundary vertical with scanning direction；
Unit is surrounded, with the region being surrounded according to the left margin, right margin, coboundary and lower boundary, it is aobvious to obtain content
Show region.
6. according to document image display apparatus described in claim 4 to 5 any one, which is characterized in that the extraction unit,
Include:
Distance acquiring unit, for obtaining four edges circle of the extended area at a distance from the center of the document picture and institute
Four edges circle of document picture are stated at a distance from the center of the document picture；Wherein, four edges circle are coboundary, below
Boundary, left margin and right margin；
Comparing unit is used for more corresponding boundary, obtain the closer coboundary of centre distance apart from the document picture, under
Boundary, left margin and right margin；Wherein, the coboundary of the extended area is corresponding with the coboundary of the document picture, described
The lower boundary of extended area is corresponding with the lower boundary of the document picture, the left margin of the extended area and the document picture
Left margin it is corresponding, the right margin of the extended area is corresponding with the right margin of the document picture；
Unit is cut, four edges circle surround the square to be formed up and down for cutting out described in acquisition from the document map on piece
Shape region obtains display picture.
7. a kind of terminal, which is characterized in that including the document image display apparatus as described in claim 4 to 6 any one.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510696302.1A CN105389165B (en) | 2015-10-21 | 2015-10-21 | Document picture display method and device and terminal |
| PCT/CN2016/093104 WO2017067275A1 (en) | 2015-10-21 | 2016-08-03 | Document image display method, device and terminal |
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| CN201510696302.1A CN105389165B (en) | 2015-10-21 | 2015-10-21 | Document picture display method and device and terminal |
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| CN105389165B (en) * | 2015-10-21 | 2019-04-30 | 广州视睿电子科技有限公司 | Document picture display method and device and terminal |
| CN106204588B (en) * | 2016-07-08 | 2020-03-17 | 腾讯科技（深圳）有限公司 | Image processing method and device |
| CN107678636A (en) * | 2016-08-01 | 2018-02-09 | 广州市动景计算机科技有限公司 | The webpage representation method and apparatus of electronic equipment |
| CN107678635A (en) * | 2016-08-01 | 2018-02-09 | 广州市动景计算机科技有限公司 | The webpage representation method and apparatus of electronic equipment |
| CN106775333A (en) * | 2017-02-16 | 2017-05-31 | 深圳市茁壮网络股份有限公司 | A kind of screenshotss method and device |
| CN107103312A (en) * | 2017-06-07 | 2017-08-29 | 深圳天珑无线科技有限公司 | A kind of image processing method and device |
| CN109710199A (en) * | 2017-10-25 | 2019-05-03 | 中兴通讯股份有限公司 | Character display method, device, terminal device and the storage medium of Mosaic screen |
| CN110543624B (en) * | 2018-05-28 | 2023-06-23 | 珠海金山办公软件有限公司 | Method and device for identifying check boxes in PDF document and electronic equipment |
| CN111414111A (en) * | 2019-01-04 | 2020-07-14 | 珠海金山办公软件有限公司 | Page cutting method and device |
| CN112635351B (en) * | 2019-09-24 | 2022-04-19 | 长鑫存储技术有限公司 | Intelligent positioning tool and intelligent positioning method |
| CN111028139B (en) * | 2019-11-01 | 2023-09-12 | 深圳供电局有限公司 | Method and system for expanding bitmap point positions |
| CN111047617B (en) * | 2019-12-18 | 2021-07-23 | 南方电网电力科技股份有限公司 | Rectangle recognition optimization method, device and equipment |
| CN113673200A (en) * | 2020-05-13 | 2021-11-19 | 西安诺瓦星云科技股份有限公司 | Text display method and text display device |
| CN112102442A (en) * | 2020-09-04 | 2020-12-18 | 卡莱特（深圳）云科技有限公司 | Image-text walking setting method and device for LED display screen |
| CN112414679B (en) * | 2020-12-04 | 2022-06-03 | 歌尔光学科技有限公司 | Method and device for extracting SFR algorithm knife edge area |
| CN113949854B (en) * | 2021-11-17 | 2022-06-24 | 杭州震威科技有限公司 | Screen seamless display method and system based on distributed projection |
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