CN100558137C - Can improve the multisection type scan method of sweep speed and image quality - Google Patents
Can improve the multisection type scan method of sweep speed and image quality Download PDFInfo
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- CN100558137C CN100558137C CNB2005100276370A CN200510027637A CN100558137C CN 100558137 C CN100558137 C CN 100558137C CN B2005100276370 A CNB2005100276370 A CN B2005100276370A CN 200510027637 A CN200510027637 A CN 200510027637A CN 100558137 C CN100558137 C CN 100558137C
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Abstract
A kind of multisection type scan method that improves sweep speed and image quality, at first optical module is moved to forward interior location from original position towards forward direction after, the first that starts the optical module scanning document to be obtaining first image, till optical module arrives forward boundary position.Then, optical module is moved to terminal position from boundary position forward towards forward direction.Then, optical module moved to reverse interior location from terminal position towards reverse direction after, the second portion that starts the optical module scanning document is to obtain second image, till optical module arrives reverse boundary position.Then, optical module is stopped after reverse direction moves from reverse boundary position.At last, first and second image map interlinking is become complete image.
Description
Technical field
The present invention relates to a kind of multisection type scan method that improves sweep speed and image quality, relate in particular to a kind of acceleration distance of the optical module that in scanner, extends, to obtain the multisection type scan method of higher sweep speed and image quality.
Background technology
Fig. 1 shows a kind of schematic diagram of book scanning instrument.As shown in Figure 1, book scanning instrument 1 has transparent platform 2 and is connected to form the inclined-plane 4 of rib portion 3 with transparent platform 2.Rib portion 3 is in order to carrying and the books 5 that opened of location, and rib portion 3 away from the original position P1 of optical module 10 near terminal position P6.
The motion flow chart of the book scanning instrument of Fig. 2 displayed map 1 optical module when the scanning books.Shown in Fig. 1 and 2, traditional scan method comprises following steps:
Step S101: optical module 10 is moved to terminal position P6 from original position P1 towards direction;
Step S102: towards reverse direction optical module 10 is quickened to move to forward boundary position P5 from terminal position P6, so that optical module 10 has speed V;
Step S103: with speed V mobile optical module 10 and make optical module 10 scanning books 5 till reverse boundary position P2, to obtain image; And
Step S104: optical module 10 is moved back to original position P1 from reverse boundary position P2, and in this step, the translational speed of optical module 10 is usually greater than speed V, to shorten the time that swash width is required.
Because the forward boundary position P5 in the book scanning instrument 1 is preferably good more the closer to terminal position P6, so that can be collected near the content of bookbinding inner edge.Yet position P6 is short more to the distance of P5, and optical module 10 will accelerate to speed V and just be not easy more.In the case, must adopt the big motor of outputting torsion to drive optical module 10, thereby make with high costs.Perhaps, even adopt the big motor of torsion to drive optical module 10, if position P6 is too short to the distance of P5, then optical module 10 can't be kept stabilized speed V later at position P5, certainly will make the image quality variation at once.In other words, under the situation of not changing motor, if will improve sweep speed, then optical module 10 time of being in unstable situation can prolong, thereby influences the image quality of document edge.
The optical module motion flow chart of the book scanning instrument of Fig. 3 displayed map 1 when the scanning generic-document.This motion flow chart also is applicable to the situation of general falt bed scanner when scanning document, therefore no longer draws out traditional falt bed scanner at this, and is only for referencial use with Fig. 1.
Shown in Fig. 3 and 1, traditional scan method comprises following steps:
Step S201: optical module 10 is quickened from original position P1 towards forward direction to move to reverse boundary position P2, so that optical module 10 has speed V;
Step S202: start optical module 10 with speed V scanning document obtaining image, till optical module 10 arrives forward boundary position P5;
Step S203: optical module 10 is moved and stop at terminal position P6 from boundary position P5 forward; And
Step S204: optical module 10 is stopped after terminal position P6 moves back to original position P1, owing to this step does not scan, so the speed of optical module 10 can be improved to shorten the time that swash width is required.
Therefore yet in order to dwindle the volume of scanner, position P1 also is shortened gradually to the distance of P2, runs into the problem of the acceleration distance deficiency that the scanning flow process of Fig. 2 run into equally.
Summary of the invention
Therefore, an object of the present invention is to provide a kind of multisection type scan method that improves sweep speed and image quality, the acceleration distance of the optical module that extends in scanner whereby is to obtain higher sweep speed and image quality.
For achieving the above object, the invention provides a kind of multisection type scan method that improves sweep speed and image quality, comprise following steps:
Optical module is moved to one forward behind the interior location from original position towards forward direction, the first that starts described optical module scanning document to be obtaining first image, till described optical module arrives forward boundary position;
Described optical module after moving to terminal position, described forward direction is stopped described optical module from described forward boundary position;
After described optical module moved to a reverse interior location from described terminal position towards the reverse direction opposite with described forward direction, start described optical module and scan the second portion of described file to obtain second image, till described optical module arrived reverse boundary position, wherein said forward boundary position and described reverse border location definition went out the sweep limits of described file along described forward direction and described reverse direction;
Described optical module is stopped after described reverse direction moves from described reverse boundary position; And
Described first image and the described second image map interlinking are become complete image corresponding to described file.
The present invention also provides a kind of multisection type scan method that improves sweep speed and image quality, comprises following steps:
(a) optical module is moved to reverse boundary position from original position towards forward direction after, the first that starts described optical module scanning document is to obtain first image, till described optical module arrives reverse interior location;
(b) described optical module after moving, described original position is stopped towards the reverse direction opposite with described forward direction from described reverse interior location;
(c) described optical module is moved to one forward behind the interior location towards described forward direction, start described optical module and scan the second portion of described file to obtain second image, till described optical module arrived forward boundary position, wherein said forward boundary position and described reverse border location definition went out the sweep limits of described file along described forward direction and described reverse direction; And
(d) described first image and the described second image map interlinking are become complete image corresponding to described file.
Description of drawings
Fig. 1 shows a kind of schematic diagram of book scanning instrument.
The motion flow chart of the existing optical module of the book scanning instrument of Fig. 2 displayed map 1 when the scanning books.
The motion flow chart of the existing optical module of the book scanning instrument of Fig. 3 displayed map 1 when the scanning generic-document.
Fig. 4 shows the motion flow chart according to the optical module of the multisection type scan method of first embodiment of the invention.
Fig. 5 shows the motion flow chart according to the optical module of the multisection type scan method of second embodiment of the invention.
Embodiment
Fig. 4 shows the motion flow chart according to the optical module of the multisection type scan method of first embodiment of the invention.Shown in Fig. 4 and 1, the multisection type scan method of present embodiment is applied in the book scanning instrument 1, book scanning instrument 1 has transparent platform 2 and reaches the inclined-plane 4 that is connected to form rib portion 3 with transparent platform 2, books 5 (or claiming file D) have opened in order to carrying in rib portion 3, and rib portion 3 is close terminal position P6 away from the original position P1 of optical module 10.This scan method comprises following steps:
Step S11: optical module 10 is moved to an interior location P3 forward from original position P1 towards forward direction, at this moment, optical module 10 utilizes original position P1 to accelerate to forward speed Vf to the distance of interior location P3 forward, and accelerator can be uniform acceleration or fluctuating acceleration;
Step S12: then, the D1 of first that starts optical module 10 scanning document D is to obtain first image, till optical module 10 arrives forward boundary position P5, usually optical module 10 is done movement at the uniform velocity from position P3 to P5 and is come with the D1 of first of speed Vf scanning document D forward, to keep the stable of image quality;
Step S13: optical module 10 is stopped optical module 10 from boundary position P5 forward after forward direction moves to terminal position P6;
Step S14: optical module 10 is moved to a reverse interior location P4 from terminal position P6 towards the reverse direction opposite with forward direction, usually optical module 10 utilizes terminal position P6 to accelerate to reverse speed Vr to the distance of reverse interior location P4, and accelerator can be uniform acceleration or fluctuating acceleration;
Step S15: then, the second portion D2 that starts optical module 10 scanning document D is to obtain second image, till optical module 10 arrives reverse boundary position P2, it should be noted that, forward boundary position P5 and reverse boundary position P2 define the sweep limits of file D along forward direction and reverse direction, front and rear edge just, and optical module 10 also is to make the next second portion D2 with reverse speed Vr scanning document D of movement at the uniform velocity from position P4 to P2 usually, to keep the stable of image quality;
Step S16: optical module 10 is stopped after reverse direction moves from reverse boundary position P2, in the present embodiment, optical module 10 stops at original position P1, yet, also optical module 10 can be stopped between position P1 and the P2, again optical module 10 be playbacked to original position P1 when treating to start next time; And
Last step is the step of image processing, just first image and the second image map interlinking is become the complete image corresponding to file D.D1 of first and second portion D2 are preferably local to overlap, so that map interlinking and elimination machine error.
Scan method by present embodiment, optical module 10 to move to from original position P1 terminal position P6 during this period of time in, optical module 10 has enough distances (P1 to P3) to accelerate to forward speed Vf, and stably come the D1 of first of scanning document D with speed Vf forward, and will move to from terminal position P6 at optical module 10 during this section of original position P1, optical module 10 has enough distances (P6 to P4) to accelerate to reverse speed Vr, and stably comes the second portion D2 of scanning document D with reverse speed Vr.Therefore, reverse speed Vr and speed Vf forward can be optimal maximum scan speed, to improve sweep speed and to promote image quality.In addition, the distance of the distance of position P1 to P2 and position P5 to P6 is not to influence the forward principal element of speed Vf and reverse speed Vr, therefore can shorten, to dwindle the volume of scanner as far as possible.Therefore, the shortcoming that the existing in prior technology sweep speed is not high, image quality is not good and scanner is bulky can obtain effective solution.
Fig. 5 shows the motion flow chart according to the optical module of the multisection type scan method of second embodiment of the invention.Shown in Fig. 5 and 1, the multisection type scan method of present embodiment is applied in the falt bed scanner, and comprises following steps:
Step S21: optical module 10 is moved to reverse boundary position P2 from original position P1 towards forward direction, wherein optical module 10 utilizes original position P1 to accelerate to the first speed V1 to the distance of reverse boundary position P2, and accelerator can be uniform acceleration or fluctuating acceleration;
Step S22: then, the D1 of first that starts optical module 10 scanning document D is to obtain first image, till optical module 10 arrived a reverse interior location P4, in this embodiment, optical module 10 was with the D1 of first of the first speed V1 scanning document D;
Step S23: optical module 10 is stopped after original position P1 moves from reverse interior location P4 towards the reverse direction opposite with forward direction, normally optical module 10 is stopped at original position P1, but also optical module 10 can be stopped between position P1 and the P2;
Step S24: optical module 10 is moved to an interior location P3 forward towards forward direction, in this example, optical module 10 utilizes original position P1 to accelerate to second speed V2 to the distance of interior location P3 forward, and accelerator can be uniform acceleration or fluctuating acceleration;
Step S25: then, the second portion D2 that starts optical module 10 scanning document D is to obtain second image, till optical module 10 arrives forward boundary position P5, wherein forward boundary position P5 and reverse boundary position P2 define the sweep limits of file D along forward direction and reverse direction, in this example, optical module 10 is with the second portion D2 of second speed V2 scanning document D, and second speed V2 can be greater than the first speed V1, to shorten sweep time;
Step S26: optical module 10 is stopped optical module 10 from boundary position P5 forward after forward direction moves to terminal position P6;
Step 27: optical module 10 is stopped after reverse direction moves from terminal position P6, normally stop at original position P1, but also can stop between position P6 and the P1, its reason is with first embodiment; And
Last step is the step of image processing, just first image and the second image map interlinking is become the complete image corresponding to file D.D1 of first and second portion D2 are preferably local to overlap, so that map interlinking and elimination machine error.
By the scan method of present embodiment, because the distance of position P1 to P2 is short, so the first speed V1 of optical module 10 is unhappy, if will scan whole images of file with this first speed V1, then certainly will spend considerable time.Therefore, present embodiment only utilizes the first speed V1 to scan the D1 of first corresponding to the file D of position P2 to P4.Then, optical module 10 utilizes position P1 to do to quicken to come the second portion D2 of scanning document D again with second speed V2 to reach higher second speed V2 to the distance of P3.By sacrificing the slow scanning time of fraction, can exchange most quick scanning flow process for, thereby can effectively shorten the time of the required cost of whole swash width.Because it is long that optical module 10 reaches the acceleration distance of second speed V2, so second speed V2 can improve as far as possible and not influence the stability of optical module 10, so the overall image quality also can promote relatively.In addition, the distance of the distance of position P1 to P2 and position P5 to P6 is not the principal element that influences the first speed V1 and second speed V2, therefore can shorten, to dwindle the volume of scanner as far as possible.Therefore, the shortcoming that the existing in prior technology sweep speed is not high, image quality is not good and scanner is bulky can obtain effective solution.
The specific embodiment that is proposed in the detailed description of preferred embodiment is only in order to convenient explanation technology contents of the present invention, rather than with narrow sense of the present invention be limited to the foregoing description, under the situation that does not exceed spirit of the present invention and claim, the many variations of being done is implemented, and all belongs to scope of the present invention.
The explanation of symbol:
D～file
D1～first
D2～second portion
P1～original position
P2～reverse boundary position
The interior location of P3～forward
P4～reverse interior location
The boundary position of P5～forward
P6～terminal position
S11～step
S12～step
S13～step
S14～step
S15～step
S16～step
S21～step
S22～step
S23～step
S24～step
S25～step
S26～step
S27～step
S101～step
S102～step
S103～step
S104～step
S201～step
S202～step
S203～step
S204～step
V～speed
V1～first speed
V2～second speed
The speed of Vf～forward
Vr～reverse speed
1～book scanning instrument
2～transparent platform
3～rib portion
4～inclined-plane
5～books
10～optical module
Claims (14)
1. the multisection type scan method that can improve sweep speed and image quality is characterized in that, comprises following steps:
Optical module moved to forward interior location from original position towards forward direction after, start described optical module scanning document, described optical module scans described file till described optical module arrives forward boundary position, with first image of the first that obtains corresponding described file; Wherein said optical module utilizes described original position to the distance of described forward interior location to accelerate to a speed forward, and with the first of the described file of described forward velocity scanning;
Described optical module after moving to terminal position, described forward direction is stopped described optical module from described forward boundary position;
After described optical module moved to reverse interior location from described terminal position towards the reverse direction opposite with described forward direction, start described optical module and scan described file, described optical module scans described file till described optical module arrives reverse boundary position, with second image of the second portion that obtains corresponding described file, wherein said forward boundary position and described reverse border location definition go out the sweep limits of described file along described forward direction and described reverse direction;
Described optical module is stopped after described reverse direction moves from described reverse boundary position; And
Described first image and the described second image map interlinking are become complete image corresponding to described file;
Wherein said forward interior location than described reverse boundary position more away from described original position.
2. multisection type scan method as claimed in claim 1 is characterized in that, described optical module stops at described original position from described reverse boundary position after described reverse direction moves.
3. multisection type scan method as claimed in claim 1, it is characterized in that, it is applied in the book scanning instrument, described books scanner has transparent platform and reaches the inclined-plane that is connected to form rib portion with described transparent platform, the books that described rib portion has opened in order to carrying, described rib portion is away from described original position and near described terminal position.
4. multisection type scan method as claimed in claim 1 is characterized in that, described optical module scans the described first and the described second portion of described file with movement at the uniform velocity.
5. multisection type scan method as claimed in claim 1 is characterized in that, described first and second portion are local to overlap.
6. multisection type scan method as claimed in claim 1 is characterized in that, described optical module utilizes described terminal position to the distance of described reverse interior location to accelerate to a reverse speed, and with the described second portion of the described file of described reverse velocity scanning.
7. the multisection type scan method that can improve sweep speed and image quality is characterized in that, comprises following steps:
(a) optical module is moved to reverse boundary position from original position towards forward direction after, start described optical module scanning document, described optical module scans described file till described optical module arrives reverse interior location, with first image of the first that obtains corresponding described file; Described optical module utilizes described original position to the distance of described reverse boundary position to accelerate to first speed, and with the first of the first velocity scanning file;
(b) described optical module is moved towards the reverse direction opposite with described forward direction toward described original position from described reverse interior location, and stopping on the described reverse direction between described original position or described original position and the described reverse boundary position;
(c) described optical module is moved to forward interior location towards described forward direction after, start described optical module and scan described file, described optical module scans described file till described optical module arrives forward boundary position, with second image of the second portion that obtains corresponding described file, wherein said forward boundary position and described reverse border location definition go out the sweep limits of described file along described forward direction and described reverse direction; Described optical module utilization from described original position to the distance of described forward interior location or between described original position and the described reverse boundary position extremely the distance of described forward interior location accelerate to second speed, and scan the second portion of described file with described second speed; And
(d) described first image and the second image map interlinking are become complete image corresponding to described file.
8. multisection type scan method as claimed in claim 7 is characterized in that, in described step (b), described optical module stops at described original position.
9. as a multisection type scan method as described in the claim 7, it is characterized in that, after described step (c), more comprise following steps:
Described optical module after moving to terminal position, forward direction is stopped described optical module from described forward boundary position.
10. multisection type scan method as claimed in claim 7 is characterized in that, more comprises following steps after described step (c):
Described optical module after moving to terminal position, described forward direction is stopped described optical module from described forward boundary position; And
Described optical module is stopped after reverse direction moves from described terminal position.
11. multisection type scan method as claimed in claim 10 is characterized in that, described optical module stops at original position from described terminal position after reverse direction moves.
12. multisection type scan method as claimed in claim 7 is characterized in that, described optical module scans the described first and the second portion of described file with movement at the uniform velocity.
13. multisection type scan method as claimed in claim 7 is characterized in that, described first and second portion are local to overlap.
14. multisection type scan method as claimed in claim 7 is characterized in that described second speed is greater than first speed.
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| CNB2005100276370A CN100558137C (en) | 2005-07-08 | 2005-07-08 | Can improve the multisection type scan method of sweep speed and image quality |
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| CN100558137C true CN100558137C (en) | 2009-11-04 |
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