CN101964858B - Correction component, mapping method and compensation method for interval of image photosensitive component - Google Patents
Correction component, mapping method and compensation method for interval of image photosensitive component Download PDFInfo
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- CN101964858B CN101964858B CN200910055205A CN200910055205A CN101964858B CN 101964858 B CN101964858 B CN 101964858B CN 200910055205 A CN200910055205 A CN 200910055205A CN 200910055205 A CN200910055205 A CN 200910055205A CN 101964858 B CN101964858 B CN 101964858B
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Abstract
The invention provides a correction component for the interval of an image photosensitive component. The component comprises a pixel unit array and a pattern, wherein pixel units are defined by intersecting parallel longitude lines with parallel latitude lines and the pixel unit array is filled with the pixel units; the pattern consists of part of pixel units; the pixel units forming the pattern have a gray scale different from that of other pixel units in the pixel unit array; and the pattern comprises unparallel longitude lines and latitude lines and parallel strips at intervals. A comparison program is set by the characteristic of the pattern; the size and position of the interval of the image photosensitive component are determined according to the consistency of the gray scale of a target pixel unit and a comparison pixel unit; and a scanned object is compensated to optimize the quality of a scanned image.
Description
Technical field
The present invention is relevant for a kind of correction of image photosensory assembly corresponding method and the compensation method with crack between assembly, the image photosensory assembly, and particularly a kind of correction of contact-type image photosensory assembly is with assembly and gap compensation method.
Background technology
The employed image photosensory assembly of scanner mainly contains four kinds in the market: the electric charge lotus root is set up part CCD, contact photosensory assembly CIS, photomultiplier PMT and CMOS conductor CMOS jointly, and wherein contact photosensory assembly and electric charge lotus root are set up part jointly and be widely used in the scanner.
Generally speaking, the electric charge lotus root is set up part jointly and converts light to analog voltage signal, and marks the gray scale of each pixel, converts analog voltage signal into digital signal by an analog/digital converter again.In the imaging process, the light that light source sends must pass through the reflection of eyeglass and the focusing of lens, and the adding of these optical modules improves whole scanner cost.The electric charge lotus root is set up a whole set of optical system of part Technology Need jointly, comprises illumination cold light source, a plurality of reflective mirror and optical lens, could set up part senser element surface imaging jointly the electric charge lotus root through the light path of complicacy.Secondly, the electric charge lotus root is set up the part scanner jointly need pass through a series of lens, speculum imaging, so can produce color error ratio and optical aberration, generally need carry out colour correction through scanning software.Moreover the electric charge lotus root is set up the part scanner jointly and sets up the part surface jointly because adopt optical lens to image in the electric charge lotus root, has the bigger depth of field, and the quality of scan image is better relatively, and particularly to the spine of protuberance, even material object can be scanned effect clearly.
Contact photosensory assembly operation principle is that the scanning internal light source is shone after reverberation on the scan manuscript carries out sensitization; Change light signal into the signal of telecommunication; Change the signal of telecommunication into digital data transmission by the A/D conversion circuit on the scanner base plate again and give computer, to accomplish whole scanning process.Because contact photosensory assembly itself just can be accomplished imaging task, do not need the complicated eyeglass and the participation of lens, so the scanner cost of contact photosensory assembly principle is lower.Scanning light source, transducer, the amplifier of contact photosensory assembly scanner become one, and its structure, principle and light path are all very simple.Contact photosensory assembly scanner directly obtains image from the contribution surface by transducer, can not produce colour cast and aberration in theory, can obtain the image effect near original copy.
Yet contact photosensory assembly scanner can only be pressed nearly Manuscript scanner because of not using camera lens, and scanning accuracy is lower, and it is equally good that the quality of scanning gained can't be set up the scan-image that part obtains jointly as the electric charge lotus root.Even if this, frivolous portable because of contact photosensory assembly scanner makes contact photosensory assembly scanner on scanning market, still occupy a tiny space; Therefore, the scan-image that improves contact photosensory assembly scanner is still the direction that must make great efforts.
Summary of the invention
It is many to cause the relatively poor factor of scan-image of scanner to have, and is example with the scanner of contact photosensory assembly, because the error that factors such as contact photosensory assembly encapsulation procedure produce causes unfixed gap to result between the setting of contact photosensory assembly.The discontinuity of position is set; The image that can cause scanning produces the phenomenon of tomography, and therefore, the present invention is for solving above-mentioned phenomenon; The corresponding method of a kind of correction of image photosensory assembly with the gap of assembly and image photosensory assembly is provided; Utilize the pattern and the calculation mode of correction chart, confirm the gap when the image photosensory assembly is provided with, thereby compensate.
Moreover the actual gap when the image photosensory assembly is provided with is though the deviation gap when being divided into translation gap and the non-rectilinear when being arranged as a straight line all can cause the image that scans to produce the phenomenon of tomography.Therefore; The present invention provides the compensation method of a kind of correction of image photosensory assembly with assembly and scan-image; The image that utilizes the correcting pattern identification to produce in gap location, and utilize pixel size tolerance gap width post-compensation, be applicable to solve translation gap and deviation gap.
According to above-mentioned, an example of the present invention provides a kind of correction to use assembly, comprises a pixel unit array and a pattern.The pixel unit array comprises the warp of many parallel interval and the parallel of many parallel interval, and each warp and each parallel intersect and be covered with the pixel unit array to define a plurality of pixel units.Pattern distribution is in the pixel unit array; Wherein pattern is made up of the pixel unit of part; And the pixel unit that constitutes pattern has a GTG and is different from other pixel unit in the pixel unit array; And wherein pattern comprises the strip of many parallel interval, not parallel warp of each strip and parallel.
Secondly, a correction according to the present invention comprises and obtains the one scan image of proofreading and correct with assembly with correspondence (mapping) method in the gap that is applied to a kind of image photosensory assembly of assembly; Set a comparison program; Wherein comparison program comprises an object pixel unit and a comparison pixels unit that sets pattern according to a pattern properties of pattern, and whether the GTG of the GTG of comparison object pixel unit and comparison pixels unit one is shown and obtained the inconsistent counting of GTG.Afterwards, carry out the comparison program on scan-image, and calculate a gap width and store the inconsistent object pixel unit of GTG and comparison pixels unit in proofreading and correct with a coordinate and gap on the assembly according to counting.Therefore,, be applied to a kind of compensation method of scan-image, after it obtains the one scan image of a destination object, insert a pixel value in the scan-image of destination object according to above-mentioned coordinate and gap according to the resulting result of above-mentioned corresponding method.
Description of drawings
The example of an image photosensory assembly of the present invention shown in Figure 1A is in order to explain that correction of the present invention is with assembly and the applied image photosensory assembly of gap compensation method.
The example of another image photosensory assembly of the present invention shown in Figure 1B.
Fig. 2 A is the sketch map of a correction of the present invention with examples of components.
Fig. 2 B and 2C are that one scan of the present invention is proofreaied and correct the sketch map with two behind assembly scanning examples.
Fig. 3 A is an example of the present invention, explains and utilizes the method flow sketch map of above-mentioned correction with assembly check gap.
Fig. 3 B is an example of the present invention, explains that the result who utilizes Fig. 3 A carries out the method flow sketch map of gap compensation.
The primary clustering symbol description
10 substrates
12 image photosensory assembly sections
101 image photosensory assemblies
103 translation gaps
105 alignment gap
Assembly is used in 20 corrections
201 warps
203 parallels
205 pixel units
207 strips
209 horizontal strips
30 provide the step of the present invention's correction with assembly
32 scannings are proofreaied and correct with assembly to obtain the step of a correction with the scan-image of assembly
Whether consistent 34 detect GTG the step of object pixel unit and comparison pixels unit on the scan-images
36 according to the result's calculating and the size of interrecord gap (IGP) and the step of position that detect
The step that 38 scanning means scan for the destination object desiring to scan
40 positions according to gap width and generation, the step of carrying out the gap compensation of correspondence position for the signal of video signal of scanning gained
Embodiment
The example of an image photosensory assembly of the present invention shown in Figure 1A is in order to explain that correction of the present invention is with assembly and the applied image photosensory assembly of gap compensation method.With reference to Figure 1A, a plurality of image photosensory assemblies 101 are set on substrate 10.In practical operation; A plurality of image photosensory assemblies 101 can continuous gapless mode form; Make that having a plurality of image photosensory assembly section (segment) 12 on the substrate 10 arranges the mode of end points with end points; And defining first direction X, can there be the translation gap 103 of end points to end points in wantonly two 12 of adjacent photosensory assembly sections.Be noted that; A plurality of image photosensory assemblies 101 on the substrate 10 also can be based on actual conditions; Exist the mode in translation gap 103 to be arranged on the substrate 10 with wantonly two 101 of adjacent image photosensory assemblies; A plurality of image photosensory assemblies 101 of arranging also definable go out first direction X, and the pattern with photosensory assembly section 12 does not exist for necessity.Secondly, the translation gap 103 that 12 of wantonly two adjacent photosensory assembly sections or wantonly two adjacent image photosensory assemblies are 101 can be identical or different, looks the situation of assembling and decide.
The example of another image photosensory assembly of the present invention shown in Figure 1B; The a plurality of image photosensory assemblies 101 arranged or photosensory assembly section 12 are still to arrange along first direction X; But the distance of setovering when being provided with; Make 12 still gapped formation of adjacent image photosensory assembly 101 or photosensory assembly section, be called alignment gap 105 (alignment gap) along the distance on the second direction Y this moment, on directions X, form distance be called translation gap 103 (shift gap); So, also can use correction of the present invention with assembly and gap compensation method like the situation of Figure 1B.According to above-mentioned; No matter how image photosensory assembly 101 or photosensory assembly section 12 is provided with; As long as produce translation gap 103 or on the Y direction, produce alignment gap 105 on to the arrangement axle directions X of end points at the end points of image photosensory assembly 101 or photosensory assembly section 12, correction of the present invention all capable of using comes the discontinuous quality that promotes scan-image of sentencing of compensated scanning image with assembly and gap compensation method.
Fig. 2 A is the sketch map of a correction of the present invention with examples of components.With reference to Fig. 2 A, one proofreaies and correct the size that has two dimension with assembly 20, for example has the rectangular shape of general printing A4 (cm*cm) size.Secondly; Proofread and correct with the parallel 203 of the warp that is covered with many parallel interval on the assembly 20 201 with many parallel interval; Each warp and parallel intersect to form intersection point, and four intersection points, warp defines size with parallel and the identical pixel unit 205 of shape is covered with whole correction with becoming a pixel unit array on the assembly 20.Be noted that each warp or parallel can be straight line or curve; Secondly, the correction that Fig. 2 A appeared uses assembly 20 to proofread and correct graphicly with the amplification microcosmic part of assembly for actual, does not show this a little warps or parallel in the correction of reality on assembly.In this example, warp 201 has n bar straight line (n is a positive integer), and is parallel with the directions X that image photosensory assembly (figure does not paint) is arranged; Parallel 203 has m bar straight line (m is a positive integer), and both are crossing to explain intersection point (0 with the pixel unit 205 that forms rectangle; 0) from the face of the upper left side of proofreading and correct with assembly 20 begins mark, extends to intersection point (n, 0) to the right; Extend to downwards intersection point (0, m), extend to intersection point (n to the lower right; But the invention is not restricted to this m).Moreover, to proofread and correct with being divided into background and pattern on the assembly 20, the GTG of background and pattern has the usefulness of evident difference for follow-up calculation.In an example, background is with complete white expression, and pattern is deceived expression with complete, but the invention is not restricted to combination like this, and different GTGs also capable of using or non-black and white are represented.
What specify is that pattern serves as basic with a pixel unit 205 that is coated with full black; Secondly, in this example, the pixel unit 205 of plurality of continuous blacking forms a strip 207, and pattern comprises the strip (bar) 207 of some parallel interval; Each strip 207 not parallel warp 201, also not parallel parallel 203.With macroscopic view, each strip 207 is the angle that non-0 degree and 90 is spent with warp 201; Each strip 207 is the angle that non-0 degree and 90 is spent with parallel 203.Understandable, strip 207 can as shown be straight line, also can be curve, therefore the invention is not restricted to said circumstances.In addition, except strip 207, proofread and correct the pattern with the horizontal strip 209 that still comprises a parallel parallel 203 on the assembly 20, horizontal strip 209 does not intersect with arbitrary strip 207 in principle; Secondly, horizontal strip 209 length with whole image photosensory assembly 101 or photosensory assembly section 12 basically is identical, one side appearance of the length of promptly horizontal strip 209 and pixel unit array etc.Moreover strip that Fig. 2 A appeared 207 is the edge zigzag, and this is due to the microcosmic, and in actual size, the visual pattern of user is a level and smooth straight line and is inclined to set.According to above-mentioned, utilize to proofread and correct and to carry out the detection in alignment gap and translation gap with the pattern on the assembly 20.
Fig. 2 B is that one scan of the present invention is proofreaied and correct the sketch map with the scanning example behind the assembly.When with the correction of the image photosensory assembly scintigram 2A of Figure 1A or Figure 1B with assembly after, the aforementioned position that has the translation gap, its scanning is proofreaied and correct the correction that image with assembly will differ from script and is used assembly.With reference to Fig. 2 B,, from left to right, follow the trail of each pixel unit 205 from top to bottom.Below all use the position of coordinate representation pixel unit 205.From (0,0) beginning, earlier current position is placed on (0,0) (object pixel unit), with pixel unit (comparison pixels unit) comparison of bottom right, (0+1 is 0+1) with (0,0) promptly to detect two pixel units.Example finds that (0,0) and (1,1) all is black, then comparison (0 again; 1) and (1,2) also all be black, continue again down comparison to the last coordinate (0, m); If (0, a) with (1, a+1) comparison ((a+1)＜m; A is a positive integer), all be all black or white, there is not the existence of translation gap between then corresponding the 0th row and the 1st row image photosensory assembly or photosensory assembly section.The 1st row that continue to detect scan-image is with the 2nd in the ranks, also do not have the existence of translation gap between the image photosensory assembly of the 1st row and the 2nd row or photosensory assembly section as a result.Up to finding that in coordinate (3,2) and (4,3) (3,2) are black, (4,3) are white, and therefore, judging between image photosensory assembly or the photosensory assembly section of the 3rd row and the 4th row has the existence of translation gap, and the translation gap is 1 pixel unit; It is black to check down more whether coordinate (3,3) and (4,4) are all, if one black one in vain then the translation gap add 1 pixel unit, up to be checked through all be to deceive till; (3,3) all are black with (4,4) in the example, and then the translation gap is exactly 1 pixel unit.Continue to follow the trail of all pixel units with the method, but and deposit all testing results in internal memory or any storage device in.According to above-mentioned,, when calculation, whether consistent with the GTG of comparison pixels unit according to the Characteristics Detection object pixel unit of proofreading and correct with the pattern of assembly with the correction of Fig. 2 A scan-image with the pattern gained of assembly.If the straight-line pattern with 45 degree (with the angle sight of warp or parallel) is an example; The characteristic of its pattern is slope absolute value 0.5; Comparison pixels unit is and is diagonal adjacent pixels unit; So whether calculation promptly detects object pixel unit consistent with the GTG that it is diagonal adjacent pixels unit, and calculate the size in the translation gap between image photosensory assembly or photosensory assembly section according to inconsistent situation.Above-mentioned data and data can be stored in internal memory or the storage device; Afterwards as when desiring to carry out the scanning of target to be scanned; Scanning system promptly can be according to aforementioned storage data and data, and the position that produces in this translation gap compensates, to optimize the scan-image of output.
Can select; If not correction can be described with single of the characteristic of the pattern of assembly; When for example curve pattern maybe must be with the parametric description more than two; Whether the mode of setting up form capable of using is set up the form of object pixel unit and the coordinate of corresponding comparison pixels unit earlier, directly utilize the Data Detection translation gap in the form to exist after the scanning.Understandable, even proofread and correct characteristic with the pattern of assembly only with single description, the also mode of manufacturing form capable of using, the detection that the present invention carried out is not limited to real-time or utilizes the mode of form.
Secondly, utilize horizontal strip 209 can detect between image photosensory assembly or photosensory assembly section and have or not aligning, it also utilizes whether detect object pixel unit consistent with the GTG of adjacent comparison pixels unit.The translation gap is identical with detecting, in case object pixel unit with the GTG of adjacent comparison pixels unit when inconsistent, promptly representes to exist between image photosensory assembly or the photosensory assembly section at this place the situation of deviation of the alignment.
Fig. 2 C is depicted as one scan of the present invention and proofreaies and correct the sketch map with another scanning example behind the assembly.Be employed resolution when employed resolution was greater than Fig. 2 B when Fig. 2 C proofreaied and correct with assembly in scanning with the different part of Fig. 2 B; Therefore; The size of the pixel unit that the size of the pixel unit that is appeared on Fig. 2 C is appeared less than Fig. 2 B; But employed resolution in the time of when calculated gap compensates, can considering to scan in the lump; So correction of the present invention when using different resolution scan, still can detect the alignment gap and the translation gap of image photosensory assembly with component application.Secondly, it is inconsistent with the GTG of adjacent comparison pixels unit that the horizontal strip 209 of Fig. 2 C presents some object pixel units, and this is the situation that there is deviation of the alignment in the image photosensory assembly.
Fig. 3 A is an example of the present invention, and a kind of corresponding method schematic flow sheet of gap of image photosensory assembly is described.With reference to Fig. 3 A, provide correction of the present invention with assembly (step 30), correction of the present invention is with having background and pattern on the assembly, and both GTGs are different.To obtain the scan-image (step 32) of a correction with assembly, when the photosensory assembly of scanning means existed aligning or translation gap, the correction of proofreading and correct with pattern on the scan-image of assembly and script can produce difference with the pattern on the assembly with assembly in the scanning correction.Whether the GTG that detects object pixel unit and comparison pixels unit on the scan-image consistent (step 34); Correction according to the present invention comprises the comparison program of object pixel unit and comparison pixels unit with the setting of the pattern properties on the assembly one; When arbitrary object pixel unit is consistent with the GTG of its corresponding comparison pixels unit, represent that then the photosensory assembly of scanning means does not have aligning or translation gap on this correspondence position; Otherwise existing on this correspondence position, aims at or the translation gap photosensory assembly of then representing scanning means.Afterwards; Size and position (step 36) according to the calculated gap as a result that detects; Do you (please the inventor whether correctly confirm according to object pixel unit with the inconsistent counting of GTG of comparison pixels unit? Yes), the size of calculated gap and write down this pixel unit (PLSCONFM be object pixel unit or comparison pixels unit as previously mentioned, pixel unit is the least unit of image; When so we mention pixel (Pixel); All be the same, difference only at image resolution if different, the size of pixel just can difference.) in proofreading and correct with the coordinate on the assembly, this gap width and position can be stored in the storage device of scanning means or miscellaneous equipment, for example in the internal memory or hard disk of scanning means.
Fig. 3 B is an example of the present invention, explains that the result who utilizes Fig. 3 A carries out the compensation method schematic flow sheet of scan-image.With reference to figure 3B, scanning means scans (step 38) for the destination object desiring to scan.Position according to gap width and generation; Carry out the gap compensation (step 40) of correspondence position for the signal of video signal of scanning gained; In an example, if gap width is a pixel, every parallel line of the position that then produces in the gap inserts a pixel; This pixel value is the mean value of the pixel value on the both sides, position that produce, gap, but the invention is not restricted to the value that said method obtains the desire compensation.According to above-mentioned, the signal integrity before the signal of video signal of overcompensation does not more compensate, therefore the scan-image of output is also more continuous, and the quality of image is good before more not compensating.
Above-described embodiment is merely explanation technological thought of the present invention and characteristics; Its purpose is familiar with present technique field person and can be understood content of the present invention and implement according to this making; When can not with qualification claim of the present invention; Be that all equalizations of doing according to disclosed spirit change or modification, must be encompassed in the claim of the present invention.
Claims (12)
1. assembly is used in a correction, comprises:
One pixel unit array, it comprises the warp of many parallel interval and the parallel of many parallel interval, and each this warp and each this parallel intersect and are covered with this pixel unit array to define a plurality of pixel units; And
One pattern; It is distributed in this pixel unit array; Wherein this pattern is made up of those pixel units of part; And those pixel units that constitute this pattern have a GTG and are different from other those pixel units in this pixel unit array, and wherein this pattern comprises the strip of many parallel interval, not parallel those warps of each this strip and those parallels.
2. assembly is used in correction as claimed in claim 1, it is characterized in that, it is parallel with those warps or those parallels that this pattern also comprises a horizontal strip, and one side appearance of a length of this horizontal strip and this pixel unit array etc.
3. assembly is used in correction as claimed in claim 2, it is characterized in that, this horizontal strip and those strips are non-intersect.
4. assembly is used in correction as claimed in claim 1, it is characterized in that, those strips and arbitrary this warp or arbitrary this parallel have one 45 degree angles.
5. assembly is used in correction as claimed in claim 1, it is characterized in that, the geometry of those pixel units is a rectangle.
6. assembly is used in correction as claimed in claim 1, it is characterized in that, those warps or those parallels are straight line.
7. assembly is used in correction as claimed in claim 1, it is characterized in that, those warps or those parallels are curve.
8. assembly is used in correction as claimed in claim 1, it is characterized in that, this pattern comprises a plurality of black picture element units, and other pixel unit then is a white.
9. the corresponding method in the gap of an image photosensory assembly comprises:
Provide a correction to use assembly, this correction comprises with assembly:
One pixel unit array, it comprises the warp of many parallel interval and the parallel of many parallel interval, and each this warp and each this parallel intersect and are covered with this pixel unit array to define a plurality of pixel units; And
One pattern; It is distributed in this pixel unit array; Wherein this pattern is made up of those pixel units of part; And those pixel units that constitute this pattern have a GTG and are different from other those pixel units in this pixel unit array, and wherein this pattern comprises the strip of many parallel interval, not parallel those warps of each this strip and those parallels;
Obtain the one scan image of this correction with assembly;
Set a comparison program, wherein should the comparison program comprise:
Set an object pixel unit and a comparison pixels unit of this pattern according to a pattern properties of this pattern; And
Whether compare the GTG of GTG and this comparison pixels unit of this object pixel unit one shows and obtains the inconsistent counting of GTG;
Execution should the comparison program on this scan-image; And
Calculating a gap width according to this counting proofreaies and correct with the coordinate on the assembly and this gap in this with inconsistent this object pixel unit of storage GTG and this comparison pixels unit.
10. the corresponding method in the gap of image photosensory assembly as claimed in claim 9 is characterized in that, the step that provides this correction to use assembly comprises those pixel units of setting this pattern and is black, and this other pixel unit is a white.
11. the corresponding method in the gap of image photosensory assembly as claimed in claim 9; It is characterized in that the step of setting this comparison program comprises sets the slope that this pattern properties is a straight line so that this object pixel unit and this comparison pixels unit are the position relation of a diagonal.
12. the compensation method of a scan-image comprises:
Provide a correction to use assembly, this correction comprises with assembly:
One pixel unit array, it comprises the warp of many parallel interval and the parallel of many parallel interval, and each this warp and each this parallel intersect and are covered with this pixel unit array to define a plurality of pixel units; And
One pattern; It is distributed in this pixel unit array; Wherein this pattern is made up of those pixel units of part; And those pixel units that constitute this pattern have a GTG and are different from other those pixel units in this pixel unit array, and wherein this pattern comprises the strip of many parallel interval, not parallel those warps of each this strip and those parallels;
Obtain this correction with the one scan image of assembly and the one scan image of a destination object;
Set a comparison program, wherein should the comparison program comprise:
Set an object pixel unit and a comparison pixels unit of this pattern according to a pattern properties of this pattern; And
Whether compare the GTG of GTG and this comparison pixels unit of this object pixel unit one shows and obtains the inconsistent counting of GTG;
Carry out this comparison program on this correction this scan-image with assembly;
Calculating a gap width according to this counting proofreaies and correct with the coordinate on the assembly and this gap in this with inconsistent this object pixel unit of storage GTG and this comparison pixels unit; And
Insert a pixel value in this scan-image of this destination object according to this coordinate and this gap.
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| EP0492956A2 (en) * | 1990-12-28 | 1992-07-01 | NCR International, Inc. | Apparatus and method for optical recognition of bar-coded characters |
| CN1228000A (en) * | 1998-03-02 | 1999-09-08 | 鸿友科技股份有限公司 | Method for correcting charge coupled element and its apparatus |
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