CN109684606A - A kind of method and apparatus that artistic effect being presented on the PDF page - Google Patents
A kind of method and apparatus that artistic effect being presented on the PDF page Download PDFInfo
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- CN109684606A CN109684606A CN201811570396.8A CN201811570396A CN109684606A CN 109684606 A CN109684606 A CN 109684606A CN 201811570396 A CN201811570396 A CN 201811570396A CN 109684606 A CN109684606 A CN 109684606A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F40/00—Handling natural language data
- G06F40/10—Text processing
- G06F40/103—Formatting, i.e. changing of presentation of documents
- G06F40/106—Display of layout of documents; Previewing
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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
- G06F9/445—Program loading or initiating
- G06F9/44521—Dynamic linking or loading; Link editing at or after load time, e.g. Java class loading
- G06F9/44526—Plug-ins; Add-ons
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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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Abstract
The present invention provides a kind of method and apparatus that artistic effect is presented on the PDF page, and method includes: to obtain the anchor point information of anchor point on the PDF page, and the anchor point information includes coordinate information and dimension information；According to the anchor point information, the anchor point picture of anchor point described in the PDF page is obtained, and the anchor point picture is covered on above the anchor point；According to the playback progress information of the audio listened to and the anchor point information, the corresponding target area in the anchor point picture of the current progress of the audio is calculated；The color value of word content in the target area is modified, so that the color value of word content is different from the color value of the word content in other regions in the modified target area.The present invention can save a large amount of processing and fabricating costs, compare existing FLASH scheme and also have obvious effects on promotion.
Description
Technical field
The present invention relates to digital processing technology fields, and in particular to one kind is in PDF (Portable Document
Format, portable document format) method and apparatus that artistic effect is presented on the page.
Background technique
Along with the propulsion of computer technology and cybertimes, electronic textbook has obtained in education of middle and primary schools teaching process
Very extensive application is arrived.Electronic textbook is the basis for realizing digitlization learning aid, is the core of school eduaction informatization
One of intracardiac appearance.
In education sector, almost all of education activities all surround teaching material expansion, this means that under Information Condition
The multimedia resource of generation needs and teaching material combines.
Currently, the common method that multimedia resource and teaching material combine is to make animation using FLASH technology, in needs
When click animation play.It is such method production trouble, at high cost, and since FLASH technology is gradually replaced other technologies,
Existing hardware environment can not be adapted to.
Summary of the invention
In view of this, the present invention provides a kind of method and apparatus that artistic effect is presented on the PDF page, it is existing to solve
Have that the existing production of method in technology using FLASH technology production animation is troublesome, at high cost, can not adapt to existing software and hardware
The problem of environment.Technical solution is as follows:
Based on an aspect of of the present present invention, the present invention provides a kind of method that artistic effect is presented on the PDF page, comprising:
The anchor point information of anchor point on the PDF page is obtained, the anchor point information includes coordinate information and dimension information；
According to the anchor point information, the anchor point picture of anchor point described in the PDF page is obtained, and by the anchor point picture
It is covered on above the anchor point；
According to the playback progress information of the audio listened to and the anchor point information, the current progress of the audio is calculated
The corresponding target area in the anchor point picture；
The color value of word content in the target area is modified, so that word content in the modified target area
Color value be different from other regions word content color value.
Optionally, each anchor point on the PDF page includes anchor point necessary information, and the anchor point necessary information is at least
It include: the ID of anchor point, the content of anchor point, anchor point corresponding audio address；
The anchor point information for obtaining anchor point on the PDF page includes: to obtain PDF pages using the method provided in good fortune sunrise SDK
The anchor point information of anchor point on face.
Optionally, after the anchor point picture is covered on above the anchor point, the method also includes:
One is arranged above the anchor point for controlling the control for showing the anchor point picture.
Optionally, the playback progress information for the audio that the basis listens to and the anchor point information, calculate the sound
Frequently the corresponding target area in the anchor point picture of current progress includes:
Calculate the ratio of the playback progress information of the audio currently listened to and the total length of the audio；
According to the ratio, the ratio corresponding target area in the anchor point picture is calculated.
Optionally, the color value of word content includes: in the modification target area
Painting canvas is created, and the anchor point picture is plotted on the painting canvas；
Obtain the color value that all pixels in the target area are corresponded on the painting canvas；
Judge whether the color value of each pixel is located within the scope of the color value in preset RGB color domain；
If be located at, the color value of pixel is revised as to the color value of preset highlight color.
Based on another aspect of the present invention, the present invention provides a kind of device that artistic effect is presented on the PDF page, packet
It includes:
Anchor point information acquisition unit, for obtaining the anchor point information of anchor point on the PDF page, the anchor point information includes coordinate
Information and dimension information；
Anchor point picture processing unit, for obtaining the anchor point of anchor point described in the PDF page according to the anchor point information
Picture, and the anchor point picture is covered on above the anchor point；
Target area computing unit, for according to the playback progress information and the anchor point information of audio listened to,
Calculate the corresponding target area in the anchor point picture of the current progress of the audio；
Unit is modified, for modifying the color value of word content in the target area, so that the modified target
The color value of word content is different from the color value of the word content in other regions in region.
Optionally, each anchor point on the PDF page includes anchor point necessary information, and the anchor point necessary information is at least
It include: the ID of anchor point, the content of anchor point, anchor point corresponding audio address；
The anchor point information acquisition unit is specifically used for, and obtains anchor point on the PDF page using the method provided in good fortune sunrise SDK
Anchor point information.
Optionally, described device further include:
Control setting unit, for one to be arranged above the anchor point for controlling the control for showing the anchor point picture
Part.
Optionally, the target area computing unit includes:
First computation subunit, for calculating the playback progress information of the audio currently listened to and the overall length of the audio
The ratio of degree；
Second computation subunit, for calculating the ratio corresponding mesh in the anchor point picture according to the ratio
Mark region.
Optionally, the modification unit includes:
First processing subelement, is plotted on the painting canvas for creating painting canvas, and by the anchor point picture；
Second processing subelement, for obtaining the color value for corresponding to all pixels in the target area on the painting canvas；
Third handles subelement, the color value model whether being located in preset RGB color domain for judging the color value of each pixel
In enclosing；
Fourth process subelement, for judging that the color value of pixel is located at preset RGB color in third processing subelement
When within the scope of the color value in domain, the color value of the pixel is revised as to the color value of preset highlight color.
In the method and apparatus provided by the invention that artistic effect is presented on the PDF page, anchor on the PDF page is obtained first
The anchor point information of point, and then according to anchor point information, the anchor point picture of anchor point in the PDF page is obtained, and the anchor point picture is covered
It covers above anchor point.The playback progress of audio is further monitored, and according to the playback progress information and anchor of the audio listened to
Point information calculates the corresponding target area in the anchor point picture of the current progress of audio, finally modifies the target area
The color value of middle word content, so that the color value of word content is different from the text in other regions in modified target area
The color value of appearance.The present invention does not need to make special animation resource, it is only necessary to edit on the PDF page as editor's lyrics
Corresponding relationship between word content and audio, by monitoring the playback progress of audio, calculates audio and works as when audio is played
The corresponding target area in anchor point picture of preceding progress, and then modify the color value of word content in target area, be allowed to and its
The color value of the word content in his region is different, so that word content (i.e. anchor point figure in audio playback progress and target area
Piece) discoloration progress be consistent, show the effect of Karaoke.The present invention not only realize it is simple, at low cost, and can be effective
Ground adapts to existing hardware environment, and effect is also obviously improved.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of flow chart of method that artistic effect is presented on the PDF page provided by the invention；
Fig. 2 is that anchor point is located at the schematic diagram in the PDF page in the present invention；
Fig. 3 is the schematic diagram that target area in anchor point picture is calculated in the present invention；
Fig. 4 is the method flow diagram of the color value of word content in a kind of modification target area provided by the invention；
Fig. 5 is a kind of schematic diagram of anchor point in the present invention；
Fig. 6 is another schematic diagram of anchor point in the present invention；
Fig. 7 is a kind of structural schematic diagram of device that artistic effect is presented on the PDF page provided by the invention；
Fig. 8 is the structural schematic diagram of target area computing unit in the present invention；
Fig. 9 is the structural schematic diagram that unit is modified in the present invention.
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.
It is limited to the deficiency of PDF page operability, the purpose of major design of the invention includes but is not limited to: providing one kind
The scheme of artistic effect is presented on the PDF page, the program can be dynamically highlighted on the PDF page, and corresponding audio is played to
Designated position corresponding to content of text, enhance the user experience of user.Wherein artistic effect is, for example, karaoke effect
Deng.
Before implementing technical solution provided by the invention, applicant is firstly the need of explanation, 1) in the present invention
Character area in the PDF page within the scope of anchor point is mensurable；2) color of the text in RGB color domain within the scope of anchor point is preset
It is worth range；3) highlight color is preset.
As shown in Figure 1, the method provided by the invention that artistic effect is presented on the PDF page may include:
Step 101, the anchor point information of anchor point on the PDF page is obtained, the anchor point information includes coordinate information and size letter
Breath.
As shown in Fig. 2, the anchor point in the present invention is the region for being directed toward audio information specific, which is usually one
A rectangular area.Anchor point information describes coordinate and size of the anchor point in the PDF page of place, and coordinate information therein is coordinate
Axis xy, dimension information are width (width), the height (height) of anchor point.Coordinate system locating for anchor point is the entire screen of equipment.
The PDF page in the present invention is using based on good fortune sunrise SDK (Software Development Kit, software development
Kit) exploitation the end PC PDF Software for producing, the PDF page after production output, each anchor point on the PDF page includes
Anchor point necessary information, the anchor point necessary information include at least: the ID of anchor point, the content of anchor point, anchor point corresponding audio address
Deng.
The present invention is based on good fortune sunrise SDK to operate the PDF page (can also claim PDF document).Specifically, the present invention obtains anchor
The mode of point information can be using the method provided in good fortune sunrise SDK :-(CGRect)
convertPdfRectToPageViewRect:(FSRectF*)rect pageIndex:(int)pageIndex。
Step 102, according to the anchor point information, the anchor point picture of anchor point described in the PDF page is obtained, and will be described
Anchor point picture is covered on above the anchor point.
In the present invention, the region of the anchor point in the PDF page can be accurately positioned in the anchor point information according to the anchor point obtained
Range, and then the anchor point picture that the anchor point is corresponded in the PDF page can be accurately truncated to by SDK, which is a RGB
(red green blue, RGB) picture, the screenshot of anchor point substantially in PDF document.
After the anchor point picture for obtaining anchor point, which is covered on above anchor point by the present invention, so from the appearance
It can't see variation, but substantially there is a width anchor point picture to cover the word content of PDF page corresponding position.
Preferably as the present invention, the present invention, can also be according to difference after anchor point picture is covered on above anchor point
Systemic software development characteristic, above anchor point be arranged one for control show anchor point picture control.The control is system
The UI class provided in development library, using the UIImageView in UIKit class libraries such as in iOS system.
Step 103, it according to the playback progress information of the audio listened to and the anchor point information, calculates the audio and works as
The corresponding target area in the anchor point picture of preceding progress.
In actual application of the present invention, when playing audio, the playback progress of audio can be monitored in real time, thus
The playback progress information of audio is got, the playback progress information of sound intermediate frequency is for example including audio play position etc..
Specifically in the present invention, the ratio of the playback progress information of the audio currently listened to and the total length of audio can be calculated
Value, and then according to the ratio, calculate the ratio corresponding target area in anchor point picture.As shown in connection with fig. 3, it is assumed that sound
The total length of frequency is 10 seconds, and audio is currently playing by the 5th second, then the playback progress information of the audio currently listened to 5 seconds and sound
The 10 seconds ratio of total length of frequency are as follows: 5/10=0.5, i.e. audio current playback progress information (i.e. ratio) is corresponding in anchor point figure
Target area in piece is the dash area in Fig. 3.
Step 104, the color value of word content in the target area is modified, so that in the modified target area
The color value of word content is different from the color value of the word content in other regions.
After determining the target area in anchor point picture, the present invention is changed by the color value of pixel in modification target area
The display color for becoming word content, is allowed to different from the color of the word content in other regions, achievees the effect that Karaoke.
Specifically, step 104 of the present invention can be realized using step shown in Fig. 4, comprising:
Step 1041, painting canvas is created, and the anchor point picture is plotted on the painting canvas.
At this point, anchor point picture will be converted into the data flow of 16 scale codings.
Step 1042, the color value that all pixels in the target area are corresponded on the painting canvas is obtained.
Specifically, the present invention is 16 binary datas for obtaining all pixels in the target area.
Step 1043, judge whether the color value of each pixel is located within the scope of the color value in preset RGB color domain.If position
In, step 1044 is executed, it is no to then follow the steps 1045.
Step 1044, the color value of pixel is revised as to the color value of preset highlight color.
Step 1045, the color value for not modifying pixel is determined.
Using the method provided by the invention that artistic effect is presented on the PDF page, PDF electronic teaching material is read in user,
When clicking the anchor point comprising audio content, it can be highlighted in the corresponding text of the display according to the position dynamic that audio is played to
Hold, to achieve the effect that play Karaoka (the dynamic lyrics).The technical solution adopted by the present invention is that the screenshot of anchor point is covered on anchor point
Top, and the pixel color value in this screenshot is modified, therefore will not have any impact to original PDF.
For shown in Fig. 5, the content in anchor point is not to occupy entire anchor point range (whole picture shown in fig. 5 is
Anchor point range), and the word speed of content is not instead of not at the uniform velocity, be divided into four sections shown in Fig. 6, every intersegmental part word speed at the uniform velocity, no
It is different with the word speed of section.In order to realize that the scene of such complexity, the data for needing more to refine are supported.The present invention illustratively gives
Such as give a definition and explain out, with data structure needed for reaching effect of the present invention.
It is minimum data unit, an anchor that word speed, which is the text chunk of one or more words composition at the uniform velocity, in anchor point content
Point includes minimum data unit as one or more (below with item replacement).It is needed in each item comprising such as following table
Information shown in 1:
Table 1
Using the method provided by the invention that artistic effect is presented on the PDF page, anchor point first on the acquisition PDF page
Anchor point information, and then according to anchor point information, the anchor point picture of anchor point in the PDF page is obtained, and the anchor point picture is covered on
Above anchor point.The playback progress of audio is further monitored, and is believed according to the playback progress information of the audio listened to and anchor point
Breath calculates the corresponding target area in the anchor point picture of the current progress of audio, finally modifies the target area Chinese
The color value of word content, so that the color value of word content is different from the word content in other regions in modified target area
Color value.The present invention does not need to make special animation resource, it is only necessary to the text on the PDF page is editted as editor's lyrics
By monitoring the playback progress of audio, it is current to calculate audio when audio is played for corresponding relationship between content and audio
The corresponding target area in anchor point picture of progress, and then the color value of word content in target area is modified, it is allowed to and other areas
The color value of the word content in domain is different, so that word content (i.e. anchor point picture) in audio playback progress and target area
Discoloration progress is consistent, and shows the effect of Karaoke.The present invention not only realizes simple, at low cost, and can effectively fit
Existing hardware environment is answered, effect is also obviously improved.
Based on a kind of method that artistic effect is presented on the PDF page provided by the invention above, the present invention also provides one
The device of artistic effect is presented in kind on the PDF page, as shown in fig. 7, device may include:
Anchor point information acquisition unit 100, for obtaining the anchor point information of anchor point on the PDF page, the anchor point information includes
Coordinate information and dimension information；
Anchor point picture processing unit 200, for obtaining anchor point described in the PDF page according to the anchor point information
Anchor point picture, and the anchor point picture is covered on above the anchor point；
Target area computing unit 300, for according to the playback progress information of the audio listened to and anchor point letter
Breath calculates the corresponding target area in the anchor point picture of the current progress of the audio；
Unit 400 is modified, for modifying the color value of word content in the target area, so that the modified mesh
The color value of word content is different from the color value of the word content in other regions in mark region.
In the present invention, each anchor point on the PDF page includes anchor point necessary information, and the anchor point necessary information is at least wrapped
It includes: the ID of anchor point, the content of anchor point, anchor point corresponding audio address；
The anchor point information acquisition unit 100 is specifically used for, and is obtained on the PDF page using the method provided in good fortune sunrise SDK
The anchor point information of anchor point.
It preferably, can also include that control is arranged in the device provided by the invention that artistic effect is presented on the PDF page
Unit, for one to be arranged above the anchor point for controlling the control for showing the anchor point picture.
As shown in figure 8, the target area computing unit 300 in the present invention may include:
First computation subunit 301, for calculating the playback progress information and the audio of the audio currently listened to
The ratio of total length；
Second computation subunit 302, for it is corresponding in the anchor point picture to calculate the ratio according to the ratio
Target area.
As shown in figure 9, the modification unit 400 in the present invention may include:
First processing subelement 401, is plotted on the painting canvas for creating painting canvas, and by the anchor point picture；
Second processing subelement 402, for obtaining the color for corresponding to all pixels in the target area on the painting canvas
Value；
Third handles subelement 403, the color value whether being located in preset RGB color domain for judging the color value of each pixel
In range；
Fourth process subelement 404, for judging that it is preset that the color value of pixel is located in third processing subelement 403
When within the scope of the color value in RGB color domain, the color value of the pixel is revised as to the color value of preset highlight color.
It should be noted that all the embodiments in this specification are described in a progressive manner, each embodiment weight
Point explanation is the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.
For device class embodiment, since it is basically similar to the method embodiment, so being described relatively simple, related place ginseng
See the part explanation of embodiment of the method.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
Above to it is provided by the invention it is a kind of on the PDF page present artistic effect method and apparatus carried out detailed Jie
It continues, used herein a specific example illustrates the principle and implementation of the invention, and the explanation of above embodiments is only
It is to be used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, according to this hair
Bright thought, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification should not manage
Solution is limitation of the present invention.
Claims (10)
1. a kind of method that artistic effect is presented on the PDF page characterized by comprising
The anchor point information of anchor point on the PDF page is obtained, the anchor point information includes coordinate information and dimension information；
According to the anchor point information, the anchor point picture of anchor point described in the PDF page is obtained, and the anchor point picture is covered
Above the anchor point；
According to the playback progress information of the audio listened to and the anchor point information, it is corresponding to calculate the current progress of the audio
Target area in the anchor point picture；
Modify the color value of word content in the target area so that in the modified target area word content color
Value is different from the color value of the word content in other regions.
2. the method according to claim 1, wherein each anchor point on the PDF page include anchor point must
Information is wanted, the anchor point necessary information includes at least: the ID of anchor point, the content of anchor point, anchor point corresponding audio address；
The anchor point information for obtaining anchor point on the PDF page includes: to be obtained on the PDF page using the method provided in good fortune sunrise SDK
The anchor point information of anchor point.
3. the method according to claim 1, wherein the anchor point picture is covered on above the anchor point it
Afterwards, the method also includes:
One is arranged above the anchor point for controlling the control for showing the anchor point picture.
4. method according to claim 1-3, which is characterized in that the broadcasting for the audio that the basis listens into
Information and the anchor point information are spent, the corresponding target area packet in the anchor point picture of the current progress of the audio is calculated
It includes:
Calculate the ratio of the playback progress information of the audio currently listened to and the total length of the audio；
According to the ratio, the ratio corresponding target area in the anchor point picture is calculated.
5. method according to claim 1-3, which is characterized in that in the modification target area in text
The color value of appearance includes:
Painting canvas is created, and the anchor point picture is plotted on the painting canvas；
Obtain the color value that all pixels in the target area are corresponded on the painting canvas；
Judge whether the color value of each pixel is located within the scope of the color value in preset RGB color domain；
If be located at, the color value of pixel is revised as to the color value of preset highlight color.
6. a kind of device that artistic effect is presented on the PDF page characterized by comprising
Anchor point information acquisition unit, for obtaining the anchor point information of anchor point on the PDF page, the anchor point information includes coordinate information
And dimension information；
Anchor point picture processing unit, for obtaining the anchor point figure of anchor point described in the PDF page according to the anchor point information
Piece, and the anchor point picture is covered on above the anchor point；
Target area computing unit is calculated for the playback progress information and the anchor point information according to the audio listened to
The corresponding target area in the anchor point picture of the current progress of the audio；
Unit is modified, for modifying the color value of word content in the target area, so that the modified target area
The color value of middle word content is different from the color value of the word content in other regions.
7. device according to claim 6, which is characterized in that each anchor point on the PDF page includes anchor point must
Information is wanted, the anchor point necessary information includes at least: the ID of anchor point, the content of anchor point, anchor point corresponding audio address；
The anchor point information acquisition unit is specifically used for, and the anchor of anchor point on the PDF page is obtained using the method provided in good fortune sunrise SDK
Point information.
8. device according to claim 6, which is characterized in that described device further include:
Control setting unit, for one to be arranged above the anchor point for controlling the control for showing the anchor point picture.
9. according to the described in any item devices of claim 6-8, which is characterized in that the target area computing unit includes:
First computation subunit, for calculating the playback progress information of the audio currently listened to and the total length of the audio
Ratio；
Second computation subunit, for calculating the ratio corresponding target area in the anchor point picture according to the ratio
Domain.
10. according to the described in any item devices of claim 6-8, which is characterized in that the modification unit includes:
First processing subelement, is plotted on the painting canvas for creating painting canvas, and by the anchor point picture；
Second processing subelement, for obtaining the color value for corresponding to all pixels in the target area on the painting canvas；
Third handles subelement, for judging whether the color value of each pixel is located within the scope of the color value in preset RGB color domain；
Fourth process subelement, for judging that the color value of pixel is located in preset RGB color domain in third processing subelement
Color value within the scope of when, the color value of the pixel is revised as to the color value of preset highlight color.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811570396.8A CN109684606B (en) | 2018-12-21 | 2018-12-21 | Method and device for presenting artistic effect on PDF page |
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|---|---|---|---|
| CN201811570396.8A CN109684606B (en) | 2018-12-21 | 2018-12-21 | Method and device for presenting artistic effect on PDF page |
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| CN109684606A true CN109684606A (en) | 2019-04-26 |
| CN109684606B CN109684606B (en) | 2023-09-01 |
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