CN202160219U - Image scanning device provided with speed compensation unit - Google Patents
Image scanning device provided with speed compensation unit Download PDFInfo
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- CN202160219U CN202160219U CN2011200534104U CN201120053410U CN202160219U CN 202160219 U CN202160219 U CN 202160219U CN 2011200534104 U CN2011200534104 U CN 2011200534104U CN 201120053410 U CN201120053410 U CN 201120053410U CN 202160219 U CN202160219 U CN 202160219U
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Abstract
An image scanning device provided with a speed compensation unit comprises a main scanner (1) and a transmission mechanism, and is characterized in that a speed compensation unit at least consists of one or a group scanning speed recorder(s) (2) and an operation module(s) mounted on one side of the document scanning traveling channel is comprised, wherein, the scanning speed recorder (2) is used for obtaining imaging data containing speed characteristics when the document passes through the main scanner (1); the operation module works out the scanning speed change parameter curve of the document according to the imaging data obtained by the scanning speed recorder (2), and restore distorted images generated in the movement direction through the parameter curve.
Description
Technical field
The present invention relates to a kind of image-scanning device, particularly, anamorphose is compensated through record high-velocity scanning process medium velocity change curve at the device of the enterprising line distortion compensation of scanning motion direction.
Background technology
Existing its scanning theory of scanning device is basic identical; " line " scanning of promptly through photo-electric conversion element (like CCD, COMS, CIS etc.) document being carried out is called as " main scanning ", and photo-electric conversion element is called " subscan " with respect to the parallel mobile scanning input of original copy.The implementation of " subscan " comprises parallel moving photoconductor conversion element and two kinds of parallel mobile original copys.The mode of parallel moving photoconductor conversion element is applied to the low speed product more, the then high speed products that are applied to of parallel mobile original copy more.
Flat bed scanner speed is lower; The Master Scanner support 6 that its common structure comprises the platform of finding a view, Master Scanner 1 is installed and can be moved along the Y direction; Document is placed on the platform of finding a view, and Master Scanner support 6 at the uniform velocity passes through scanning area by Master Scanner 1 recording image data.
Because the variation of document movement velocity is a key factor that causes image fault during scanning, existing solution then lays particular emphasis on the improvement of transmission mechanism, perhaps employing is sacrificed sweep speed even than complex sensing device and operator block.
Summary of the invention
The object of the invention then is the deficiency to above-mentioned prior art; Gather demand for satisfying high-speed image; Designed a kind of velocity compensation unit that is used for scanning means, the view data that obtains in the time of can be to high-velocity scanning is carried out velocity compensation, guarantees the quality of image.
The object of the invention can be realized through following measure: the present invention includes Master Scanner 1, be used for moving transmission mechanism, file scanning moving conduit and the velocity compensation unit of document, the velocity compensation unit comprises one or one group the sweep speed register 2 and the computing module that are installed in file scanning moving conduit one side at least.
Sweep speed register 2 is used for the omnidistance document of taking and contains the camera data of velocity characteristic through the process of Master Scanner, and sweep speed register 2 can be photo-electric conversion elements such as CCD, CIS.Photo-electric conversion element is linear photo-electric conversion element 8 or rectangular light electric transition element 9 or the above two common uses, photo-electric conversion element can with the supporting use of optical imagery assembly.Computing module can adopt single-chip microcomputer; The scan speed change parameter curve of Y direction when computing module calculates document through Master Scanner according to the camera data of sweep speed register 2, and through the distorted image reduction of this parameter curve to being produced on the direction of motion.
At the opposite side of file scanning moving conduit in the face of sweep speed register 2; Be provided with the background baffle plate 5 of auxiliary measuring document movement velocity; This background baffle plate 5 can be color background or the background that has the range mark line; Sweep speed register 2 obtains the sweep speed characteristic through the variation of taking and analysis background is regional.
Beneficial effect of the present invention is:
Take the process of document through whole process, can the most directly calculate the movement velocity of document through Master Scanner, and the distorted image reduction to being produced on the direction of motion.Neither need accurate transmission mechanism, also do not need complex sensing device and operator block, can realize the high-velocity scanning process.
Description of drawings
Fig. 1 is the principal intention-pattern 1 of embodiments of the invention.
Fig. 2 is the principal intention-pattern 2 of embodiments of the invention.
Fig. 3 is the operation principle flow chart-pattern 1 of velocity compensation of the present invention unit.
Fig. 4 is the operation principle flow chart-pattern 2 of velocity compensation of the present invention unit.
Among the figure: 1, Master Scanner; 2, sweep speed register; 3 platforms of finding a view; 5, background baffle plate; 6, Master Scanner support; 7, markings; 8, linear photo-electric conversion element; 9, rectangular light electric transition element.
Embodiment
Rely on the basic general knowledge of this area below, the present invention done explanation further in conjunction with accompanying drawing:
The image-scanning device that has the velocity compensation unit of the present invention, Master Scanner 1 sweep limits are the included scopes of the dotted arrow of directions X from X1 to X2.Sweep speed register 2 is installed in file scanning moving conduit one side, and installation direction is perpendicular to Master Scanner.Sweep speed register 2 can omnidistancely be taken the document motion image, and through the distorted image reduction of this motion image to being produced on the direction of motion.Concrete enforcement means have three kinds:
1. adopt linear photo-electric conversion element 8, take the image of a line on the Y direction, its scope is the included scope of the dotted arrow of Y direction from Y1 to Y2 (like Fig. 1, shown in Figure 2);
2. adopt the rectangular light electric transition element, from the local rectangle area image (shown in arrow Z1) of forward taking moving document, this structure is fitted 9 and is used for autoamtic paper feeding formula scanning device and flatbed scanner;
3. adopt rectangular light electric transition element 9; Local image (shown in arrow Z2) from reverse taking moving background; This structure is applicable to flatbed scanner, can cooperate the background baffle plate 5 that has latticed striped to strengthen the judgment accuracy of rectangular light electric transition element 9;
Because only take the local image of document motion, shooting speed and quality can be protected.Computing module can be installed in the optional position of image-scanning device, links with Master Scanner 1 and sweep speed register 2, and distorted image is analyzed and reduced.Concrete grammar is following:
1. Master Scanner 1 is taken file and picture with fixed sampling frequency F1 at directions X, forms image sets LX, and sweep speed register 2 is taken document motion image or background motion image with fixed sampling frequency F2 in the Y direction simultaneously, forms image sets LY;
2. compare data adjacent among the image sets LY one by one through computing module, calculate the relative shift that each time the sample Y direction corresponding with sample frequency F2 produces, form the relative shift array;
3. according to specified stepping index, from the relative shift array, extract satisfactory sampled point array, after these sampled points are pressed F1:F2 and converted, from image sets LX, extract the file and picture that corresponding sampling points data sequential combination can form; When not having direct corresponding sampling points, take the method composograph data of interpolation calculation.
By the resolution scan breadth of 200DPI is that the document of X01*Y01 inch is an example, scanning back image be the X02*Y02 pixel (X02=X01*200DPI, Y02=Y01*200DPI).Normal scan speed be the V page or leaf/minute; Scanning device the fastest with the slowest instant scanning speed be V1 with V2 (V1＞V＞V2), the difference of the instantaneous velocity that the drive system of scanning device produces (mainly be the highest instantaneous velocity with normally the difference of demarcation speed) should be controlled at ± 30% within.Because instantaneous speed difference has caused the distortion of image, promptly image produces on the Y direction and stretches or contraction, can revise through the velocity compensation unit.
The resolution of directions X main scanning photo-electric conversion element 1 shooting should be more than or equal to X2 pixel, and it is identical that the Y direction of camera speed main scanning campaign keeps, thereby can obtain the reference data of more Y direction.
Embodiment 3:
Under low precision mode of operation, adopt the structure of embodiment 1, stepping is 1, the workflow of computing module is as shown in Figure 3:
Directions X main scanning photo-electric conversion element 1 camera speed be set at the V*Y2 hardwood/minute, Y scanning direction tachograph 2 shooting resolution are Y02 pixel (200DPI), Y scanning direction tachograph 2 camera speeds also be set at the V*Y2 hardwood/minute.Two set of pieces are made a video recording synchronously, form two groups of image sets (being m=n ≈ Y02) that quantity is identical.
The image sets of comparative analysis LY one by one under normal speed, should detect in each adjacent image the document edges pixel that can move forward and cover corresponding background, and this moment, image need not be revised, and directly the LX image with correspondence deposits formal image sets LXX in.Like the scanning motion rapid speed, when accumulated error surpasses 1 pixel, can cause in the adjacent image background position to move forward and surpass a pixel; Slower like scanning motion speed, when accumulated error surpasses 1 pixel, can cause in the adjacent image background position to be moved to producing.For the distortion that produces at a high speed, the mean value that calculates adjacent front and back two secondary normal LX images forms new image and preserves into formal image sets LXX as remedying; For the distortion that low speed produces, with the LX image-erasing that does not detect the correspondence that moves the background position, the mean value that perhaps calculates the how secondary LX image that belongs to same position forms new image and preserves into formal image sets LXX as remedying.The most revised LXX image sets merges in order can form final file and picture.
Embodiment 4:
Under the high accuracy mode of operation, adopt the structure of embodiment 2, stepping is 2, the workflow of computing module is as shown in Figure 4:
Directions X main scanning photo-electric conversion element 1 camera speed be set at the V*Y02*2 hardwood/minute, Y scanning direction tachograph 2 shooting resolution are 400DPI, Y scanning direction tachograph 2 camera speeds also be set at the V*Y02*2 hardwood/minute.Two set of pieces are made a video recording synchronously, form two groups of image sets (being m=n ≈ Y02*2) that quantity is identical.
Because the machine driving velocity variable of scanning device is limited, generally can not surpass ± 30%.And since the sample frequency of LX and LY all be doubled or be more; So can use first width of cloth LY1 image as reference; Successive image in the comparative analysis LY image sets one by one; Thereby find all corresponding LX images that meet background position mobile condition to preserve into formal image sets LXX, other ineligible images can be given up in the LX image sets.Merge in order through the LXX image sets of screening the most at last and can form final file and picture.
During practical implementation, can adopt other the camera speed and the combination of resolution, the workflow of reference implementation example 3 and embodiment 4 is accomplished the correction to image through the method for interpolation calculation.
More than each embodiment be not to concrete restriction of the present invention, do not breaking away from claims restricted portion of the present invention, can make all concrete modifications to this device.
Claims (5)
1. the image-scanning device that has the velocity compensation unit; Comprise Master Scanner (1), transmission mechanism; It is characterized in that being: this image-scanning device comprises a velocity compensation unit; Described velocity compensation unit comprises one or one group the sweep speed register (2) and the computing module that are installed in file scanning moving conduit side at least; Wherein: sweep speed register (2) contains the camera data of velocity characteristic when being used to obtain document through Master Scanner (1); Described sweep speed register (2) is the photo-electric conversion element that is used to take the sweep speed characteristic image, and the camera data that computing module obtains according to sweep speed register (2) calculates the scan speed change parameter curve of document, and through this parameter curve the distorted image that is produced on the direction of motion is reduced; Photo-electric conversion element in the described sweep speed register (2) is linear photo-electric conversion element (8) or rectangular light electric transition element (9) or the above two common uses, photo-electric conversion element can with the supporting use of optical imagery assembly.
2. the image-scanning device that has the velocity compensation unit according to claim 1; It is characterized in that: the rectangular area that described rectangular light electric transition element (9) is taken is a rectangular region, and the length direction in captured zone is identical with the Y direction of main scanning campaign.
3. the image-scanning device that has the velocity compensation unit according to claim 1; It is characterized in that: at the opposite side of file scanning moving conduit in the face of sweep speed register (2); Be provided with the background baffle plate (5) of auxiliary measuring document movement velocity, this background baffle plate (5) is color background or background that has the range mark line or latticed striped background.
4. the image-scanning device that has the velocity compensation unit according to claim 1; It is characterized in that: described rectangular light electric transition element (9) stationary distribution is around Master Scanner (1); Forward is installed rectangular light electric transition element (9); Rectangular light electric transition element (9) is taken the motion image of direction and the local rectangular area of the identical direct shooting document of Master Scanner (1), through the contrast acquisition sweep speed characteristic of adjacent camera data.
5. the image-scanning device that has the velocity compensation unit according to claim 1; It is characterized in that: described rectangular light electric transition element (9) stationary distribution is around Master Scanner (1); The reverse rectangular light electric transition element (9) of installing; The motion image of the local rectangular area of the opposite shooting background baffle plate (5) of the shooting direction of rectangular light electric transition element (9) and Master Scanner (1) is through the contrast acquisition sweep speed characteristic of adjacent background camera data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200534104U CN202160219U (en) | 2011-03-02 | 2011-03-02 | Image scanning device provided with speed compensation unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200534104U CN202160219U (en) | 2011-03-02 | 2011-03-02 | Image scanning device provided with speed compensation unit |
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| CN202160219U true CN202160219U (en) | 2012-03-07 |
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| CN2011200534104U Expired - Fee Related CN202160219U (en) | 2011-03-02 | 2011-03-02 | Image scanning device provided with speed compensation unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114026436A (en) * | 2019-06-25 | 2022-02-08 | 索尼集团公司 | Image processing apparatus, image processing method, and program |
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2011
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114026436A (en) * | 2019-06-25 | 2022-02-08 | 索尼集团公司 | Image processing apparatus, image processing method, and program |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120307 Termination date: 20140302 |