CN1393826A - Compensator for image scan - Google Patents
Compensator for image scan Download PDFInfo
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- CN1393826A CN1393826A CN 01119866 CN01119866A CN1393826A CN 1393826 A CN1393826 A CN 1393826A CN 01119866 CN01119866 CN 01119866 CN 01119866 A CN01119866 A CN 01119866A CN 1393826 A CN1393826 A CN 1393826A
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Abstract
The invented image scanning compensation device is used for the optical scanner. The optical scanner includes the platform, the sensitization set and the storage set. The object to be scanned is placed on the platform. The sensitization set contains the sensitization component group for scanning. The storage set is utilized to store the scanned image. The image scanning compensation device includes the calibration plate group, the calibration sensitization component group and the image-procesisng unit. The calibration plate group contains two calibration plates located on two sides of the platform respectively. The calibration sensitization component group located on the two sides of the scanning sensitization component group is used for inducing the calibration plates to get the calibrated image group.
Description
The invention relates to a kind of compensator for image scan, and particularly relevant for the compensator for image scan that causes the light path deviation in a kind of compensate for optical scanner because of vibration.
Along with the raising of utilization rate and the breakthrough of relevant photo-sensitive cell technology, the resolution of optical scanner (scanner), develop into colored 300dpi, 600dpi and 1000dpi by early stage 200dpi (dot per inch) black and white, gray scale, even the professional machine of 2000dpi and 4000dpi etc.Along with the raising of resolution, the vibration for board during scanning just seems more responsive.
The principle of general optical scanner (scanner) be with light source projects to object to be scanned, and reflex to the planar optics group through object to be scanned and be projected to the electric charge lotus root again and close element (charge coupledevice CCD), reads to change into digital signal.When kinematic train running and drive lens or when together driving the electric charge mat and closing element all might produce vibration, and the quality of influence scanning.Please refer to Fig. 1, is the known optical scanner produces the light path deviation because of vibration synoptic diagram.When optical scanner scanned, kinematic train 109 can drive optical systems 111 (be level crossing group 104, lens 106 and photosensitive device 110, wherein photosensitive device promptly is that above-mentioned electric charge lotus root is closed element) and 107 move along the direction of scanning.And the whenever mobile a bit of distance of optical system 111, photosensitive device 110 will scan induction to object to be scanned 100.During scanning, the path of light is: light source (not drawing among the figure) projects object to be scanned 100, reflexes to the level crossing group 104 of optical scanner through object to be scanned 100, reflexes to lens 106 again, incides at last in the photosensitive device 110.When scanning, kinematic train all can produce vibration usually, so, can cause the vibration of optical system 111, thereby produce light path deviation N ' N, make the image of scanning produce the cover color anomaly, cause image quality to improve.Light path deviation N ' N that the vibration of this optical system and this vibration are caused might produce in directions such as x axle, y axle and z axles, Fig. 1 is an example with the axial optical system vibration of z only, and corresponding this of explanation vibrates the axial light path deviation of the y N ' N that is produced.
The object of the present invention is to provide a kind of compensator for image scan, can compensate and occur in the axial light path deviation of x axle, y axle and z, to improve the quality of scan-image.
For achieving the above object, the present invention proposes a kind of compensator for image scan, is applied in the optical scanner, and this optical scanner has a platform, in order to place an object to be scanned; One photosensitive device includes one scan photo-sensitive cell group; One storage device behind scanning photo-sensitive cell group induction object to be scanned, can obtain the one scan image and be temporary in one storing dress.This compensator for image scan comprises: a calibration plate group, comprise two calibration plates, and lay respectively at the platform both sides; One calibration photo-sensitive cell group is positioned at the both sides of scanning the photo-sensitive cell group, in order to respond to calibration plate to obtain the measurement image group; One image process unit in order to acquisition comparison measurement image, and is adjusted scan-image.
Compensator for image scan of the present invention is arranged at the both sides of platform with calibration plate, and calibration plate is long strip-board shape, and width increases or reduces along with the scanning moving direction is linear.
Compensator for image scan of the present invention, its image process unit is by acquisition comparison measurement image, calculate the light path deviation, and its method that calculates the light path deviation is the graphics proportion and the change in location of the measurement image of the calibration plate sensed by self calibration photo-sensitive cell group, with direction and the size that calculates the light path deviation.Wherein, along the light path departure of scanning photo-sensitive cell prescription to (x direction of principal axis, i.e. CCD direction), the change in location of the measurement image that can sense by calibration photo-sensitive cell group calculates the light path deviation in this direction, with the correct scan image; Other is in the light path deviation of vertical object to be scanned direction (being y direction of principal axis and z direction of principal axis), the change in location of the measurement image of the both sides of can be respectively sensing by calibration photo-sensitive cell group and the ratio of measurement image change, and calculate the light path departure on this direction (y axle and z direction of principal axis) respectively and proofread and correct.In addition, this light path departure of reversing around the y axle calculates according to axial this light path departure of z; This light path departure of reversing around the z axle calculates according to axial this light path departure of y.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. elaborate:
The drawing explanation:
Fig. 1 is the known optical scanner produces the light path deviation because of vibration a synoptic diagram;
Fig. 2 is the optical scanner synoptic diagram of a kind of compensator for image scan of preferred embodiment of the present invention;
Fig. 3 is that the light path of Fig. 2 is launched synoptic diagram;
Fig. 4 is the photosensitive device synoptic diagram of a kind of compensator for image scan of preferred embodiment of the present invention;
Fig. 5, Fig. 6 are the calibration plate synoptic diagram of a kind of compensator for image scan of preferred embodiment of the present invention;
The measurement image that Fig. 7～11st, light path deviation cause calibration photo-sensitive cell group to sense changes synoptic diagram;
Figure 12 is the scanner schematic flow sheet of optical sensor of a kind of compensator for image scan of preferred embodiment of the present invention.Description of reference numerals:
100,200: object to be scanned
102,202: platform
104,204: level crossing
106,206: lens
107,207: the direction of scanning
109: kinematic train
110,210: photosensitive device
111,211: optical system
203,205: calibration plate
203a, 205a: the measurement image after the vibration
203a, 205b: the measurement image of desirable (friction)
210a, 210b, 210c: scanning photo-sensitive cell group
212: calibration photo-sensitive cell group
The axial light path deviation of dy1, dy2:y
The axial light path deviation of dx1:x
θ y: scan-image is around the angle of y axle rotation
θ z: scan-image is around the angle of z axle rotation
W2, w3: the measurement image width after the vibration
W1: the measurement image width of desirable (friction)
N ' N: light path deviation
Embodiment:
Please also refer to Fig. 2～4, wherein, Fig. 2 is the synoptic diagram of optical scanner of using a kind of compensator for image scan of preferred embodiment of the present invention, Fig. 3 is that the light path of Fig. 2 is launched synoptic diagram (omitting the icon of level crossing), and Fig. 4 is the photosensitive device synoptic diagram of a kind of compensator for image scan of preferred embodiment of the present invention.
As shown in Figure 2, compensator for image scan of the present invention is installed in the optical scanner, this optical scanner has a light source (not drawing among the figure); One platform 202 is in order to place an object to be scanned 200; One photosensitive device 210 includes one scan photo-sensitive cell group R, G, B, 210a, 210b, 210c (as shown in Figure 4); One storage device (not drawing among the figure).After scanning photo-sensitive cell group 210a, 210b, 210c sense object to be scanned 200, can obtain the one scan image and be temporary in a storage device (not drawing among the figure).At this, be the y change in coordinate axis direction with direction of scanning 207, be the x change in coordinate axis direction with direction along platform 202 and vertical y coordinate axis, and with the right-hand rule push away the z change in coordinate axis direction for perpendicular to platform 202 and go out the direction of platform 202.
When optical scanner scanned, kinematic train (not drawing among the figure) can drive optical system 211 (being level crossing group 204, lens 206 and photosensitive device 210) and 207 move along the direction of scanning.And the whenever mobile a bit of distance of optical system 211, photosensitive device 210 will scan induction to object to be scanned 200, and the image scan that scans is temporary in a storage device (not drawing among the figure).During scanning, the path of light is: light source (not drawing among the figure) projects object to be scanned 200, reflex to the level crossing group 204 of optical scanner through object to be scanned 200, reflex to lens 206 again, at last, incide scanning photo-sensitive cell group 210a, 210b, 210c corresponding in the photosensitive device 210.Wherein, photosensitive device 210 is elongated, the moving direction 207 during perpendicular to scanning.
Yet, all can produce vibration when kinematic train operates usually, so when scanning, can cause the vibration of optical system 211, therefore can produce light path deviation N ' N.Though, all might be on x, y, z change in coordinate axis direction because of vibration causes light path deviation N ' N, for convenience of explanation, Fig. 2 spy illustrates it with y direction of principal axis light path deviation N ' N that vibration causes.As shown in Figure 2, the optical routing N-M that vibration makes becomes N '-M ', and causes image scan offset distance N ' N (light path deviation).By the compensator for image scan of present embodiment, can compensate above-mentioned light path deviation, detailed as following.
The compensator for image scan of present embodiment comprises: a calibration plate group 203,205 is positioned at platform 202 both sides; One calibration photo-sensitive cell group 212 is positioned at the both sides of scanning photo-sensitive cell group 210a, 210b, 210c, in order to respond to calibration plate 203,205 to obtain the measurement image group; One image process unit (not drawing among the figure) is compared measurement image to calculate light path deviation N ' N, to adjust scan-image in order to acquisition.Please also refer to Figure 12, is the scanner schematic flow sheet of optical sensor of using a kind of compensator for image scan of preferred embodiment of the present invention.According to present embodiment, when the optical scanner of the compensator for image scan of using present embodiment begins to scan (as Figure 12 302), scanning photo-sensitive cell group 210a in the photosensitive device 210,210b, 210c and calibration photo-sensitive cell group 212, can respond to simultaneously respectively object to be scanned 200 (as Figure 12 310) and induction calibration plate 203,205 (as Figure 12 304), and obtain respectively scan-image (as Figure 12 312) and measurement image (as Figure 12 306).Afterwards, respectively the scan-image that obtains is temporary in storage device (as Figure 12 314), and according to the measurement image that obtains calculate the light path deviation (as Figure 12 308).At last, with an image process unit, with light path deviation N ' N compensate into scan-image (as Figure 12 316) with obtain desirable (no light path deviation N ' N's a) image (as Figure 12 318).Above-mentioned calibration photo-sensitive cell group 212 as shown in Figure 4, is made up of a plurality of calibration photo-sensitive cells, and it is L row respectively and takes advantage of the capable both sides that are arranged in scanning photo-sensitive cell group 210a, 210b, 210c of K, and L and K are the positive integer greater than 1.In addition, scan the photo-sensitive cell group and formed, and the size of calibration photo-sensitive cell is respectively less than the degree of accuracy of the size that scans photo-sensitive cell (that is the integrated level of calibration photo-sensitive cell group is greater than integrated level of scanning photo-sensitive cell group) with the raising induction by a plurality of scanning photo-sensitive cells.
The method of calculating the axial light path deviation of x N ' N among the present invention is: the measurement image of the calibration plate of sensing by self calibration photo-sensitive cell group 212 203,205 calculates the size of the axial light path deviation of x N ' N in the axial displacement of x.The method of calculating y axle and the axial light path deviation of z N ' N among the present invention is: the width and the change in location of the measurement image of the calibration plate of sensing by self calibration photo-sensitive cell group 212 203,205, and to calculate the size of the axial light path deviation of y axle and z N ' N respectively.
The method that above-mentioned the present invention calculates light path deviation N ' N is: by calibration plate 203,205 is made long strip-board shape, and the moving direction 207 of width during along with scanning be linear and increase, or linear the minimizing.As shown in Figure 2, its plane is trapezoidal; Also can be as shown in Figure 5, its plane is triangular in shape; Or as shown in Figure 6, its curved shape in long limit.The width of calibration plate 203,205 is made along the direction of scanning 207 linear increase or the linear purposes that reduce are for along the direction of scanning 207 when scanning, the width of the calibration plate 203,205 that can scan is as discre value, that is to say, on the position of direction of scanning 207, the width value of its corresponding calibration plate 203,205 is all unique at any one.In this way, then can judge is produce on which position of object to be scanned 200 moving.Also can judge the image that scans and whether be twisted by the change of calibration plate 203,205 width values that scan.The method that calculates the size of light path deviation N ' N on x, y, the z direction of principal axis is detailed as following:
The axial light path deviation of y: please refer to Fig. 7, is that the measurement image that obtains when the light path deviation of y change in coordinate axis direction takes place in when scanning changes synoptic diagram.During scanning if when the y change in coordinate axis direction produces the light path deviation of dy1 size, be positioned at the measurement image 203a and the 205a of scan-image 200a both sides, just can change in the position that image vibration takes place (the desirable measurement image when 203b among the figure shown in the oblique line part and 205b are the generation of expression friction).Because of the vibration of y change in coordinate axis direction, can make calibration photo-sensitive cell 212 (as shown in Figure 3) skip and do not sense a certain section calibration plate 203 and 205 (as Fig. 2), so just can in measurement image 203a, 205a, produce a discontinuous change.So, measurement image 203a, the 205a that utilizes calibration photo-sensitive cell group 212 to sense just can push away, and the scan-image 200a that senses from scanning photo-sensitive cell group 210a, 210b, 210c (as Fig. 4) produces the light path deviation of many a spot of y directions in which position.
In like manner, please refer to Fig. 8, is that the measurement image that obtains when the light path deviation of y change in coordinate axis direction takes place in when scanning changes synoptic diagram (when the light path deviation size of platform both sides is inequality).At this moment, inequality because of the light path deviation N ' N in the platform both sides, a side is dy1, and opposite side is dy2, so scan-image 200a is then as reversed θ z angle (as around the rotation of z axle) in certain position.
The axial light path deviation of x: please refer to Fig. 9, is that the measurement image that obtains when the light path deviation of x change in coordinate axis direction takes place in when scanning changes synoptic diagram.During scanning if when the x change in coordinate axis direction produces the light path deviation of dx1 size, be positioned at measurement image (shown in the oblique line part) 203a and the 205a of scan-image 200a both sides, just can change in the position that image vibration takes place (the desirable measurement image when 203b among the figure shown in the oblique line part and 205b are the generation of expression friction).Because the platform both sides are identical in the light path deviation N ' of x change in coordinate axis direction N size, a certain section calibration plate 203 that can make that calibration photo-sensitive cell 212 (as Fig. 3) senses and 205 (as Fig. 2) are simultaneously toward the x change in coordinate axis direction segment distance of beating, so can produce a discontinuous change in measurement image 203a, 205a.So, measurement image 203a, the 205a that utilizes calibration photo-sensitive cell group 212 to sense just can push away, and the scan-image 200a that senses from scanning photo-sensitive cell group 210a, 210b, 210c (as Fig. 4) produces the light path deviation of many a spot of x directions in which position.
The axial light path deviation of z: please refer to Figure 10, is that the measurement image that obtains when the light path deviation of z change in coordinate axis direction takes place in when scanning changes synoptic diagram (when light path deviation size in both sides is identical).During scanning when if the light path deviation of z change in coordinate axis direction takes place, be positioned at the measurement image 203a and the 205a of scan-image 200a both sides, just can change in the position that image vibration takes place (the desirable measurement image when 203b among the figure shown in the oblique line part and 205b are the generation of expression friction).Because of identical in the light path deviation N ' of z change in coordinate axis direction N size in the platform both sides, can make among measurement image 203a, the 205a that calibration photo-sensitive cell 212 (as Fig. 3) senses a certain section produce fuzzy (because of focal length inaccurate) and amplify simultaneously or dwindle identical ratio.Its amplification or dwindle ratio, can from w2/w1 with, wherein, w2 is the measurement image 203a after the vibration, the width of 205a, and w1 is desirable vibrationless measurement image 203b, the width of 205b.In this way, just can push away to such an extent that the scan-image 200a that senses from scanning photo-sensitive cell group 210a, 210b, 210c (as Fig. 4) produces the light path deviation of many a spot of z directions in which position.
In like manner, please refer to Figure 11, is that the measurement image that obtains when the light path deviation of z change in coordinate axis direction takes place in when scanning changes synoptic diagram (when the light path deviation in the platform both sides varies in size).At this moment, because of the light path deviation in the platform both sides varies in size, can make among measurement image 203a, the 205a that calibration photo-sensitive cell 212 (as Fig. 3) senses a certain section produce fuzzy (because of focal length inaccurate) and amplify or dwindle, and two side calibrations can be not identical as the zoom ratio of image 203a, 205a.Its amplification or dwindle ratio, can be respectively from w2/w1 and w3/w1 with, wherein, w3 is the width of the measurement image 203a after the vibration, w2 is the width of the measurement image 205a after the vibration, and w1 is desirable vibrationless school image 203b, the width of 205b.At this moment, scan-image 200a is then as reversed θ y angle (as around the rotation of y axle) in certain position.
The above embodiments are to be example calibration plate is located in the both sides of platform, yet, according to spirit of the present invention, the calibration plate of being sensed because of calibration photo-sensitive cell group is that image (also is the face data, but not point or line data), therefore only use calibration plate, also can reach the effect of the foregoing description in a side of platform.So, also can only calibration plate be located at a side of platform, and will calibrate the photo-sensitive cell group and be located at a side corresponding with calibration plate.
According to embodiments of the invention as can be known, the present invention has following advantage at least:
(1): compensator for image scan of the present invention, utilize calibration plate to be long strip-board shape and width along with the scanning moving direction is the linear feature that increases or reduce, can be with the measurement image sensed usefulness as the location recognition of scan-image, and utilize the position and the width variation of measurement image, axial light path departure can be calculated, and the light path departure of reversing and reversing around the z axle around the y axle can be calculated at x axle, y axle and z.
(2): compensator for image scan of the present invention, utilize calibration plate is installed in scanning photo-sensitive cell side, can in sweep object, sense measurement image.And the direction and the size of calculating light path deviation, utilize an image process unit again, the light path departure is compensated in the scan-image, can improve the scan-image vibration that causes because of vibration in the optical scanner, improve image quality.
(3): compensator for image scan of the present invention, because of adopting the mode of software image compensation, can accomplish the real-time imaging Compensation Feedback, and not have the problem points of time delay (time delay).
Though the present invention with a preferred embodiment openly as above; but it is not in order to limit the present invention; any personnel that are familiar with this technology; do not break away from change and retouching that spirit of the present invention is done; all do not break away from protection scope of the present invention, and protection scope of the present invention should be with being as the criterion that claims were limited.
Claims (12)
1. a compensator for image scan is applied in the optical scanner, and this optical scanner has a platform, in order to place an object to be scanned; One photosensitive device includes one scan photo-sensitive cell group; One storage device; After this scanning photo-sensitive cell group is responded to this object to be scanned, can obtain the one scan image and be temporary in this storage device, it is characterized in that: this compensator for image scan comprises:
One calibration plate group comprises two calibration plates, lays respectively at this platform both sides;
One calibrates the photo-sensitive cell group, is positioned at the both sides of this scanning photo-sensitive cell group, in order to respond to those calibration plates to obtain the measurement image group;
One image process unit in order to those measurement image of acquisition comparison, and is adjusted this scan-image.
2. compensator for image scan according to claim 1, it is characterized in that: this calibration photo-sensitive cell group is made up of a plurality of calibration photo-sensitive cells, those calibration photo-sensitive cells are to be the L row respectively to take advantage of the capable both sides that are arranged in this scanning photo-sensitive cell group of K, wherein, L and K are the positive integers greater than 1.
3. compensator for image scan according to claim 2 is characterized in that: those scanning photo-sensitive cell groups are made up of a plurality of scanning photo-sensitive cells, and the size of those calibration photosensory assemblies scans the size of photo-sensitive cells respectively less than those.
4. compensator for image scan according to claim 1 is characterized in that: those calibration plates are long strip-board shape, and its width increases along with this moving direction is linear.
5. compensator for image scan according to claim 1 is characterized in that: those calibration plates are long strip-board shape, and its width reduces along with this moving direction is linear.
6. compensator for image scan according to claim 1, it is characterized in that: this image process unit is by those measurement image groups of acquisition comparison, calculate a light path deviation, and the method for calculating this light path deviation is the graphics proportion and the change in location of those measurement image of those calibration plates of sensing by this calibration photo-sensitive cell group certainly, with direction and the size that calculates this light path deviation.
7. a compensator for image scan is applied in the optical scanner, and this optical scanner has a platform, in order to place an object to be scanned; One photosensitive device includes one scan photosensory assembly group; An and storage device; After this scanning photo-sensitive cell group is responded to this object to be scanned, can obtain the one scan image and be temporary in this storage device, it is characterized in that: this compensator for image scan comprises:
One calibration plate is positioned at a side of this platform;
One calibrates the photo-sensitive cell group, is positioned at a side of this scanning photo-sensitive cell group, in order to respond to this calibration plate to obtain measurement image;
One image process unit in order to this measurement image of acquisition comparison, and is adjusted this scan-image.
8. compensator for image scan according to claim 7, it is characterized in that: this calibration photo-sensitive cell group is made up of a plurality of calibration photo-sensitive cells, those calibration photo-sensitive cells are the L row respectively and take advantage of the capable both sides that are arranged in this scanning photo-sensitive cell group of K, wherein, L and K are the positive integers greater than 1.
9. compensator for image scan according to claim 8 is characterized in that: those scanning photo-sensitive cell groups are made up of a plurality of scanning photo-sensitive cells, and the size of those calibration photo-sensitive cells scans the size of photo-sensitive cells respectively less than those.
10. compensator for image scan according to claim 7 is characterized in that: this calibration plate is long strip-board shape, and its width increases along with this moving direction is linear.
11. compensator for image scan according to claim 7 is characterized in that: this calibration plate is long strip-board shape, and its width reduces along with this moving direction is linear.
12. compensator for image scan according to claim 7, it is characterized in that: this image process unit is by this measurement image of acquisition comparison, calculate a light path deviation, and the method for calculating this light path deviation is the graphics proportion and the change in location of this measurement image of this calibration plate of sensing by this calibration photo-sensitive cell group certainly, with direction and the size that calculates this light path deviation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01119866 CN1393826A (en) | 2001-07-03 | 2001-07-03 | Compensator for image scan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01119866 CN1393826A (en) | 2001-07-03 | 2001-07-03 | Compensator for image scan |
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| CN1393826A true CN1393826A (en) | 2003-01-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8943581B2 (en) | 2009-06-16 | 2015-01-27 | Intel Corporation | Controlled access to functionality of a wireless device |
| CN109738358A (en) * | 2018-12-28 | 2019-05-10 | 深圳达闼科技控股有限公司 | Control the method, apparatus and optical material detection device of optical material detection device |
-
2001
- 2001-07-03 CN CN 01119866 patent/CN1393826A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8943581B2 (en) | 2009-06-16 | 2015-01-27 | Intel Corporation | Controlled access to functionality of a wireless device |
| US9778842B2 (en) | 2009-06-16 | 2017-10-03 | Intel Corporation | Controlled access to functionality of a wireless device |
| CN109738358A (en) * | 2018-12-28 | 2019-05-10 | 深圳达闼科技控股有限公司 | Control the method, apparatus and optical material detection device of optical material detection device |
| CN109738358B (en) * | 2018-12-28 | 2021-07-06 | 深圳达闼科技控股有限公司 | Method and device for controlling optical substance detection apparatus, and optical substance detection apparatus |
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