CN1227999A - Method for correcting multi-charge coupled element and its apparatus - Google Patents
Method for correcting multi-charge coupled element and its apparatus Download PDFInfo
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- CN1227999A CN1227999A CN 98100480 CN98100480A CN1227999A CN 1227999 A CN1227999 A CN 1227999A CN 98100480 CN98100480 CN 98100480 CN 98100480 A CN98100480 A CN 98100480A CN 1227999 A CN1227999 A CN 1227999A
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Abstract
A correction method for multiple CCDs and its device are disclosed. A correcting flat plate is arranged befor the CCDs. It has multiple correction patterns. Said multiple CCDs are used to scan the said correction patterns. Resultant image signals are sent to a multiprocessor, which determines which group of CCDs to output their signals to next unit. A supplementary double sampler is connected to multiprocessor and its DC gain is regulated according to received signals. A 3-in-1 trichromatic (red, green and blue) multiprocessor is connected to the output of said sampler to generate a regulated signal. An A/D converter is connected to output of the trichromatic multiprocessor to convert the regulated signal to digital one. An ASIC generates severl correction data based on the digital signal and output it to computer or processor for processing, so several CCDs are corrected to a correct position.
Description
The present invention relates to the bearing calibration and the device thereof of the scanning system of a kind of adjustment of scanning system and bearing calibration and device thereof, particularly a kind of multi-charge coupled element.
General scanning means roughly can be divided into three major types, is respectively hand held scanning system, paper feed type scanning system, platform-type scanning system.Scanning system is that image is focused imaging to a photoelectric sensing element to produce signal for image processing usefulness.One group of scanning means comprises light source, reflecting optics group, lens group usually, to be used for paper pattern catoptric imaging to charge coupled cell (charge-coupled device; CCD) on, CCD produces a picture signal thus.Generally be with file by CCD the place ahead to scan its image, CCD is with many minimum semiconductor optoelectronic element assembled arrangement array and making in line, when CCD the place ahead is passed through in the file translation, CCD can scan each bar parallel lines one by one to produce the picture signal of a complete file, this picture signal is adjusted the DC current gain of picture signal via a pretreatment unit, then use an analog digital converter, this analog picture signal is converted to digital signal, and signal is done bright portion via a post-processing unit, dark portion and an ancient woman's ornament agate correction (highlight, shadow, and Gamma correction) back generation one image code.
Traditional scanning system is to capture document image with a CCD, yet this mode is only applicable to the less file of width, and (paper of 210mm * 297mm) is when the bigger file of need scanning as standard A 4, just must increase the distance between CCD and file, thereby cause many shortcomings.For instance, after the distance between CCD and file increases, will cause the scanning system volume to increase, can't satisfy the trend that requires the miniaturization of scanning system volume now; And another bigger problem is, this kind increases the mode of distance between CCD and file, causes the deterioration of image definition and the increase of sweep time, can't meet the need of market.
In view of this, the purpose of this invention is to provide one and have a plurality of charge coupled cells (charge coupled device; CCD) CCD bearing calibration and device thereof in the scanning system.
The object of the present invention is achieved like this: a kind of multi-CCD corrector that is used to have the scanning system of a plurality of charge coupled cells, it is characterized in that: this means for correcting is at least by a multi-processor, one complementary double sampler, one analog digital converter, one post-processing unit, one Application Specific Integrated Circuit and one is proofreaied and correct dull and stereotyped the composition, wherein, described multi-processor is connected with a plurality of charge coupled cells, described complementary double sampler is connected with this multi-processor, this multi-processor is in order in this complementary double sampler of signal input of specifying one group of charge coupled cell, this complementary double sampler is adjusted its DC current gain to produce an adjusted signal at the signal that detects; Described analog digital converter is connected in after this complementary double double sample device, should adjusted conversion of signals be digital signal; Described post-processing unit is connected in after this analog digital converter, produces an image code after this digital signal is done bright portion, dark portion and the correction of an ancient woman's ornament agate; Described Application Specific Integrated Circuit is connected in after this post-processing unit, produces a plurality of correction datas at this image code; Described correction is dull and stereotyped, places before the described charge coupled cell.
Comprise that a plurality of correcting patterns are formed thereon on the described correction flat board, the spacing between each correcting pattern equates, so that described charge coupled cell can detect more than one correcting pattern.
Described correcting pattern one example is for comprising one at least with respect to horizontal line tilt an oblique line and two vertical lines of first angle, and two vertical lines join with the two ends of oblique line respectively.Described first angle is about 45 degree.
Another example of described correcting pattern is for comprising one at least with respect to horizontal line tilt an oblique line and a vertical line of second angle, and an end of vertical line and oblique line joins.Described second angle is about 45 degree.
Described means for correcting also can comprise one in order to show the display of a plurality of correction datas.
A kind of method that is used for a plurality of charge coupled cells of correct scan system is characterized in that may further comprise the steps:
A) be provided with one before a plurality of charge coupled cells and proofread and correct flat board, on this correction flat board a plurality of correcting patterns are arranged, the spacing between each correcting pattern equates, so that these charge coupled cells can detect more than one correcting pattern;
B) use these a plurality of charge coupled cells to scan this correcting pattern, produce a picture signal; And
C) produce a correction data corresponding to this picture signal, be used for proofreading and correct.
Wherein, described correcting pattern one example is for comprising an oblique line and two vertical lines with respect to horizontal line inclination third angle degree at least, and two vertical lines join with the two ends of this oblique line respectively.Described third angle degree is about 45 degree.
Another example of described correcting pattern is for comprising one at least with respect to horizontal line tilt an oblique line and a vertical line of the 4th angle, and an end of vertical line and this oblique line joins.Described the 4th angle is about 45 degree.
Described a plurality of correcting pattern will produce the plural groups correction signal.Wherein, described plural groups correction signal is if there is relative displacement, then represent the installation site skew of these a plurality of charge coupled cells, described plural groups correction signal represents that then the installation site of these a plurality of charge coupled cells is correct if there is not relative displacement.
When described a plurality of charge coupled cells are two, described correcting pattern can be three, and each correcting pattern comprises oblique line and two vertical lines with respect to horizontal line inclination 45 degree at least, article two, vertical line joins with the two ends of oblique line respectively, three correcting patterns will produce four groups of correction signals, four groups of correction signals are if there is relative displacement, then represent the installation site skew of described two charge coupled cells, four groups of correction signals represent that then the installation site of described two charge coupled cells is correct if there is not relative displacement.
This shows, a plurality of CCD are sent to the picture signal that is produced a two-in-one multi-processor respectively, this multi-processor is imported the signal of what group CCD in next element in order to specify, then through a front processor, as: complementary double sampler (correlated double sampling, CDS), adjust its DC current gain at the signal that detects, it is three-in-one red to produce a signal to, green, blue three primary colors multi-processor, via an analog digital converter, be connected in after three primary colors (RGB) multi-processor, with this adjusted conversion of signals is digital signal, again through a post-processing unit, be connected in after this analog-digital converter, digital signal is done bright portion, produce image code after dark portion and the correction of an ancient woman's ornament agate, last and an Application Specific Integrated Circuit (application specific integrated circuits arranged; ASIC), be connected in after the post-processing unit, produce a plurality of correction datas, be sent to one and be used for handling in the computer or processor of correction data, finish according to this a plurality of CCD are proofreaied and correct to a position accurately at image code.
Below by drawings and Examples the present invention is described further again:
Fig. 1 is the schematic diagram of means for correcting of the present invention;
Fig. 2 is the schematic diagram of correcting pattern of the present invention;
Fig. 3 is the flow chart of the method for the present invention's announcement:
Fig. 4 is the sequential chart of one embodiment of the invention;
Fig. 5 is for showing not calibrated preceding correction signal;
Fig. 6 is the correction signal that shows after overcorrect;
Fig. 7 and Fig. 8 show the 2nd CCD scan line in one embodiment of the invention and the location diagram of correcting pattern respectively.
The present invention discloses a multi-charge coupled element (charge coupled device; CCD) bearing calibration of scanning system, via the use of many CCD, scanning system can scan than the bigger file of traditional A4 paper, as 36 inches file.
Consult Fig. 1, with the scanning system of using two CCD is an embodiment, in scanning system, first CCD10 and second CCD20 are arranged on the straight line, proofread and correct dull and stereotyped 30 and place its place ahead, the position of proofreading and correct dull and stereotyped place is the position at file place when scanning, by two set of contact lenses groups, lens set 40 as shown in FIG. and lens set 42, be arranged at respectively proofread and correct dull and stereotyped 30 and first CCD10, second CCD20 between.
Fig. 1 top shows the pattern of proofreading and correct on dull and stereotyped 30, proofread and correct the correcting pattern that comprises many groups on dull and stereotyped 30, the number of correcting pattern is decided on employed CCD number, in this embodiment, corresponding to CCD10 and CCD20, three correcting patterns 32 are arranged, 34 and 36 are formed in the correction dull and stereotyped 30, correcting pattern 32 to 36 is to be made up of an oblique line and two vertical lines respectively, oblique line tilts about 45 ° with respect to horizontal line, two vertical lines respectively with the two ends end to end of oblique line, form pattern as English alphabet " N ", in addition, the correcting pattern among the present invention also can be made up of an oblique line and a vertical line.Wherein the spacing between each correcting pattern is all equal, and oblique line can also be other angles with respect to the angle that horizontal line tilts, and Fig. 2 shows the schematic diagram of correcting pattern among the present invention.
Consult Fig. 1, for proofreading and correct the reference marker on dull and stereotyped 30, to the distance between P9, the wide P2 that equals of the maximum file of this scanning system is to the distance between the P8, as 36 inches greater than P1 for the length of correction dull and stereotyped 30 to P9 for P1.The resolution of supposing scanning system is 400dpi (dot per inch; What per inch can be differentiated counts), then a file is wide is equivalent to 14400 points, wherein first CCD10 can sense P1 to the pattern between P6, second CCD20 can sense P4 to the pattern between P9, and P1 is first CCD10 and second overlay region that CCD20 all can sense to the zone between P4.
P1, P3, P4, P6, P7 and P9 correspond to correcting pattern 32,34 respectively, reach the straight line portion in 36, P2 is corresponding with the central point of correcting pattern 32 bends part, same, then the central point with correcting pattern 34 and 36 bends part is corresponding respectively for P5 and P8.The file that is scanned can be divided into several parts, with this embodiment, can be divided into two parts, and these two parts are scanned by first CCD10 and second CCD20 respectively, first partly be P2 to the zone between P6, and second portion is that P4 is to the zone between P8.
Shown in Figure 3 is implementation method of the present invention, first CCD10 and second sub image signal supplementary biography that CCD20 read are delivered to a two-in-one multi-processor 100, this multi-processor 100 is for being familiar with the known element of this art person, multi-processor 100 is imported the signal of what group CCD in next element in order to specify, Fig. 4 is the sequential chart of multi-processor 100, follow through a front processor, as: complementary double sampler (correlated double sampling; CDS) 200, adjust its DC current gain at the signal that detects, produce a signal, then have one three-in-one red, green, blue three primary colors multi-processors (RGB multiprocessor) 300 are connected in after the CDS200, three-in-one red, green, blue three primary colors multi-processor 300 is in order to select red, green, blue tricolor signal exports in next element in regular turn, one analog digital converter 400 is connected in after the three primary colors multi-processor 300, with this adjusted conversion of signals is digital signal, again through a post-processing unit, be connected in after the analog digital converter, digital signal is done bright portion, produce an image code after dark portion and the correction of an ancient woman's ornament agate, last and an Application Specific Integrated Circuit (application specific integrated circuits arranged; ASIC) 500, be connected in after the post-processing unit, produce a plurality of correction datas at image code, be sent to one and be used for handling in the host computer or processor 600 of correction data.
Signal after first CCD10 and second CCD20 will change through firmware is sent in the host computer 600 with 0.1 second interval, after host computer 600 detects this correction data, correction data is shown usefulness as correction with GTG, for ease of adjusting and proofread and correct this correction data of comparison, the picture signal that CCD scanned will from top to bottom be shown on the display in regular turn, as Fig. 5, shown in Figure 6, Fig. 5 is the correction signal before proofreading and correct, Fig. 6 is the correction signal after proofreading and correct, correction signal 40 shows the result of correcting pattern 32 via first CCD10 scanning, correction signal 42 shows the result of correcting pattern 34 via first CCD10 scanning, correction signal 44 shows the result of correcting pattern 34 via second CCD20 scanning, and correction signal 46 shows the result of correcting pattern 36 via second CCD20 scanning.
Wherein, if relative displacement is arranged, represent that then the installation position of these a plurality of CCD is equipped with skew between above-mentioned correction signal, above-mentioned correction signal represents that the installation site of these a plurality of CCD is correct if there is not relative displacement.In Fig. 5, correction signal 44 and correction signal 46 are also unjustified to each other, and with respect to other correction signal, correction signal 44 and correction signal 46 also have displacement, can infer CCD20 thus and not be installed in accurately on the position.Therefore the method among the present invention can be offset because of the installation site in order to determine which CCD, and make its scan line incorrect to positive correction flat board 30, suppose that CCD20 is offset because of the installation site, and make its scan line crooked as Fig. 7, generation is corresponding to the correction signal among Fig. 5 44 and 46, Fig. 7 cathetus 61 shows the scan line that CCD20 tilts, just distance 11 and the distance 12 between 34b and 34c that gets between 34a and 34b is unequal, distance 13 and the distance 14 between 36b and 36c between 36a and 36b are also unequal, therefore need to adjust the location of CCD20.At first adjust the position of CCD20, correction signal 40,42,44,46 all is positioned on the same horizontal line, then adjusts CCD10 respectively and CCD20 is located on the same horizontal line, the method for adjustment has many kinds, its details is known by being familiar with this art person, does not run business into particular one at this and states.
After CCD location adjusted, its correcting pattern can obtain signal as shown in Figure 6 after scanning, by among Fig. 8 as can be known, after the location is correct, distance 15 between 34a and 34b can equal the distance 16 between 34b and 34c, distance 17 between 36a and 36b also can equal the distance 18 between 36b and 36c, and the user can as above correction and method of adjustment proofread and correct each CCD respectively and finish its location in regular turn.
Claims (18)
1, a kind of multi-CCD corrector that is used to have the scanning system of a plurality of charge coupled cells, it is characterized in that: this means for correcting is at least by a multi-processor, one complementary double sampler, one analog digital converter, one post-processing unit, one Application Specific Integrated Circuit and one is proofreaied and correct dull and stereotyped the composition, wherein, described multi-processor is connected with a plurality of charge coupled cells, described complementary double sampler is connected with this multi-processor, this multi-processor is in order in this complementary double sampler of signal input of specifying one group of charge coupled cell, this complementary double sampler is at the signal that detects, adjust its DC current gain to produce an adjusted signal: described analog digital converter, being connected in after this complementary double double sample device, should adjusted conversion of signals be digital signal; Described post-processing unit is connected in after this analog digital converter, produces an image code after this digital signal is done bright portion, dark portion and the correction of an ancient woman's ornament agate; Described Application Specific Integrated Circuit is connected in after this post-processing unit, produces a plurality of correction datas at this image code; Described correction is dull and stereotyped, places before the described charge coupled cell.
2, multi-CCD corrector according to claim 1, it is characterized in that: comprise that a plurality of correcting patterns are formed thereon on the described correction flat board, spacing between each correcting pattern equates, so that described charge coupled cell can detect more than one correcting pattern.
3, multi-CCD corrector according to claim 2, it is characterized in that: described correcting pattern comprises one at least with respect to horizontal line tilt an oblique line and two vertical lines of first angle, and two vertical lines join with the two ends of oblique line respectively.
4, multi-CCD corrector according to claim 3 is characterized in that: described first angle is about 45 degree.
5, multi-CCD corrector according to claim 2 is characterized in that: described correcting pattern comprises one at least with respect to horizontal line tilt an oblique line and a vertical line of second angle, and an end of vertical line and oblique line joins.
6, multi-CCD corrector according to claim 5 is characterized in that: described second angle is about 45 degree.
7, multi-CCD corrector according to claim 1 is characterized in that: described means for correcting also can comprise one in order to showing the display of a plurality of correction datas.
8, a kind of method that is used for a plurality of charge coupled cells of correct scan system is characterized in that may further comprise the steps:
A) be provided with one before a plurality of charge coupled cells and proofread and correct flat board, on this correction flat board a plurality of correcting patterns are arranged, the spacing between each correcting pattern equates, so that these charge coupled cells can detect more than one correcting pattern;
B) use these a plurality of charge coupled cells to scan this correcting pattern, produce a picture signal; And
C) produce a correction data corresponding to this picture signal, be used for proofreading and correct.
9, method for correcting multi-charge coupled element according to claim 8, it is characterized in that: described correcting pattern comprises an oblique line and two vertical lines with respect to horizontal line inclination third angle degree at least, and two vertical lines join with the two ends of this oblique line respectively.
10, method for correcting multi-charge coupled element according to claim 9 is characterized in that: described third angle degree is about 45 degree.
11, method for correcting multi-charge coupled element according to claim 8 is characterized in that: described correcting pattern comprises one at least with respect to horizontal line tilt an oblique line and a vertical line of the 4th angle, and an end of vertical line and this oblique line joins.
12, method for correcting multi-charge coupled element according to claim 11 is characterized in that: described the 4th angle is about 45 degree.
13, method for correcting multi-charge coupled element according to claim 11 is characterized in that: described a plurality of correcting patterns will produce the plural groups correction signal.
14, method for correcting multi-charge coupled element according to claim 13, it is characterized in that: described plural groups correction signal is if there is relative displacement, then represent the installation site skew of these a plurality of charge coupled cells, described plural groups correction signal represents that then the installation site of these a plurality of charge coupled cells is correct if there is not relative displacement.
15, method for correcting multi-charge coupled element according to claim 11 is characterized in that: described a plurality of charge coupled cells are two.
16, method for correcting multi-charge coupled element according to claim 15, it is characterized in that: described correcting pattern is three, and each correcting pattern comprises one at least with respect to horizontal line tilt oblique line and two vertical lines of 45 degree, and two vertical lines join with the two ends of oblique line respectively.
17, method for correcting multi-charge coupled element according to claim 16 is characterized in that: described three correcting patterns will produce four groups of correction signals.
18, method for correcting multi-charge coupled element according to claim 17, it is characterized in that: described four groups of correction signals are if there is relative displacement, then represent the installation site skew of described two charge coupled cells, described four groups of correction signals represent that then the installation site of described two charge coupled cells is correct if there is not relative displacement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB981004806A CN1161960C (en) | 1998-03-03 | 1998-03-03 | Method for correcting multi-charge coupled element and its apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB981004806A CN1161960C (en) | 1998-03-03 | 1998-03-03 | Method for correcting multi-charge coupled element and its apparatus |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB011398620A Division CN1167251C (en) | 1998-03-03 | 1998-03-03 | Multi-CCD corrector |
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| CN1227999A true CN1227999A (en) | 1999-09-08 |
| CN1161960C CN1161960C (en) | 2004-08-11 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100341308C (en) * | 2004-09-29 | 2007-10-03 | 光宝科技股份有限公司 | Origin correction method for optical image reading device |
| CN101883202A (en) * | 2010-07-07 | 2010-11-10 | 世大光电(深圳)有限公司 | Detection sensor internal signal improving device and method |
| CN101964858B (en) * | 2009-07-23 | 2012-09-19 | 上海中晶科技有限公司 | Correction component, mapping method and compensation method for interval of image photosensitive component |
| CN107079072A (en) * | 2014-10-31 | 2017-08-18 | 惠普发展公司，有限责任合伙企业 | The intercrossed calibration of imager |
-
1998
- 1998-03-03 CN CNB981004806A patent/CN1161960C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100341308C (en) * | 2004-09-29 | 2007-10-03 | 光宝科技股份有限公司 | Origin correction method for optical image reading device |
| CN101964858B (en) * | 2009-07-23 | 2012-09-19 | 上海中晶科技有限公司 | Correction component, mapping method and compensation method for interval of image photosensitive component |
| CN101883202A (en) * | 2010-07-07 | 2010-11-10 | 世大光电(深圳)有限公司 | Detection sensor internal signal improving device and method |
| CN107079072A (en) * | 2014-10-31 | 2017-08-18 | 惠普发展公司，有限责任合伙企业 | The intercrossed calibration of imager |
| US10425637B2 (en) | 2014-10-31 | 2019-09-24 | Hewlett-Packard Development Company, L.P. | Cross-calibration of imagers |
| CN107079072B (en) * | 2014-10-31 | 2019-11-05 | 惠普发展公司，有限责任合伙企业 | The intercrossed calibration of imager |
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| CN1161960C (en) | 2004-08-11 |
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