TW573429B - Image correction method and device of optical scanner - Google Patents

Description

573429 Case No. 91114253 V. Description of the Invention (1) The technical field of the invention, the present invention is particularly related to an image calibration method and equipment for an optical scanner is related to the use of a calibration pattern to correct the image scanning; Cha Zhu 2) Technical Background of the Invention: Due to the photoelectricity, one of the quasi-equipment of computers, especially scanners. Here, the technology is booming, and the technology of peripheral devices using semiconductor technology is changing rapidly. Among them, it has gradually been widely used. It has become a computer standard. Refer to the optical scanning 11 on the upper side of the draft 10. By pressing on the glass 15 inside the shell 11, the light turns the beam into the imaging light, which will affect itself The performance test of the hardware and software factors, etc. Please refer to Figure 1. The three-dimensional junction of the device is provided with a drive guide rod. The 1-square reflection literature scanner is converted into a signal by the lens to convert the scanning image. And the correction map 2, the system is a schematic diagram of the current market. It is mainly that the original bearing glass 1 5 sets 13 to drive an image operation to perform linear motion. The principle of image scanning of manuscript 10 is mainly image, and a charge is used for computer memory and image quality factors are very or Scanning the document The device is usually tested before leaving the factory. It is a typical platform that can be seen in the conventional calibration test chart. A scanner 1 housing a reflective document retrieval device 2 is hollow outside to carry out the original loading work. Digital signals to be processed by the image capture device coupling element (CCD). Evening, including the quality of the scanner body and the environment, a series of related schematic diagrams will be made. Figure two

573429 Emperor 9111 Continent 92. 11 2 5 8th, the description of the invention (2), it is a -16, general color scanning when scanning, you can correctly use this type of pattern to test, to test its horse The value obtained by the pattern can be compared with each other. The black device is processed by the comparison value pair with a fixed image color and other functions to achieve transmission. The test pattern 16 of pattern 160 and white pattern 161 is used for color correction to make it the standard. 'In order to scan the scanned file and display it later, or it is beneficial: correction' For example, the function of the drive device is to measure the stability. However, this kind of second-order color is limited, which means that multiple ratios cannot be accurately used to obtain more accurate correction results. (3) Inventing the present device, the main one is the correction chart. The comparison of the degree of correction can be obtained in the scanner. The brief description of the scanner on the scanner and the gear set is bad. The parameters of the design of the design of the central design should be corrected, whether the abnormal drive is tangible and clear, and then the light is clear. Explanation: For one kind of optics, it is to provide a performance with three cognitive processes. Learn about positive parameters. For one purpose, the active device is acting on it, especially for poor alignment. For the purpose of relatively aligning, the source device gives the scanner a multi-color level above the color to obtain a phase value, which is more positive for the situation than the scanner does through the image capture. The parameters are based on the transmission test, the image correction method and the installed correction pattern, especially in the range of the order, so that the scanner responds to several different light and dark types of defects compared to the several performance values and scans, and it should also correct the pattern. The setting is used to test the driving speed of the stepping motor during the driving process of the device, and the setting of the calibration pattern can be known, especially the light supply of the light source.

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Case No. 91114253 Description of the invention (4) Calibration parameters required Please refer to FIG. 3A ', which is a preferred embodiment of the calibration pattern of the present invention. As shown in FIG. 2A, the correction pattern 17 is designed with three or three levels of regions with different color levels. For example, it can be defined as different regions with color contrast between black and white. Black, the area 172 is the whitest, and the color of area 1 71 is between the blackest and the whitest. It has the same color. When the scanner scans it, it has different values. And the meaning it represents, and the difference between them is of comparable significance. The size of the correction pattern can be approximately equal to the size of one scan in the scanner = the size of the window. Of course, there can also be larger or smaller designs. ^ Please refer to FIG. 3B, which is another preferred embodiment of the correction pattern of the present invention. As shown in FIG. 3B, the correction pattern 18 is designed with four regions with different color levels, as shown in FIG. As described in A, it can also be defined as the contrast area between black and white. Then the area 180 is the blackest, the area 183 is the whitest, and the color of the area 181 is between the blackest area 18 and the whitest area 1. Between 8 3 but biased to the darker, the area 丨 8 2 The color is between the darkest area 180 and the whitest area 183 but tends to be whiter, and the different colors of the areas °° 180, 181, 182, and 183 are gradually different and have comparative significance. Design, its different colors have different preset values and meanings when scanning them] and can compare and process the scanning results. For example, when the scanner scans the scanning line 185 When the value is in a range, another value is obtained in the district coffee, and the value in another range is obtained in the area 182, which has no difference

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Page 7 11 2 8 Amendment 573429 7 Case No. 91114253 V. Description of the Invention (5) Values in the same range are generated because each area has a different color. Also, when the scanner scans the scanning line 186, it will get a value in the range 183, a value in another range in the area 182, and a value in another range in the area 181, and in the area 18 〇 We also get a value in another range, which has a different value range because each area has a different color. Please refer to Figure 4, which is a flowchart of the method steps of the present invention. This is an image calibration method of an optical scanner. The calibration pattern is scanned by an image capture device, and the results obtained after scanning are processed with a preset ^) to obtain the required calibration parameters. The steps provided by the present invention are: a. Preparing a calibration pattern 30 with at least three color gradation ranges; b. An image capture device scanning the calibration pattern 31 at a predetermined speed; c. Obtaining a relative comparison of scanning the calibration pattern Values 32; d. Compare processing with preset parameters according to the obtained relative comparison value 33; e. Output the results of the comparison processing to a display device 34; f. Get the correction parameters according to the results of the comparison processing, u The image scanning is calibrated as described in step a above, and the calibration patterns of the three color gradation ranges are as follows: the calibration pattern shown in Figure 3A or Figure 3B is used, which can be defined as black jlack) and white The pattern design of the range of different shades between different colors "," color "and" white ", not only have relatively different shades but also comparable design patterns. As described in step d above, the different shades in the correction pattern are different. Paradigm of Contrast

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The relative comparison value obtained around the calculation processing of the comparison value can display the preset value that each scanning line should perform during the image scanning process. When a defect occurs during the scanning process, the Scanning a single spot shows a relative change in the preset. 573429

, A = refer to FIG. 5A to FIG. 5C, which are not intended for the waveform of the scanning correction pattern of the present invention. As shown in the steps described in Figure 4, for example, when the stepping motor in the driving device of the scanner should have been driven at a preset step speed to drive the image capture device, when scanning the calibration pattern, The value represented by the normal stepping speed will also be displayed. This can be viewed by a display device or its waveform. If the stepper motor itself has an abnormal speed, it will display its error during the scanning process. Normal step speed. For example, a glitch is generated at point a on the 2 axis (time axis T), and you can scan the calibration pattern to find that the original preset value will generate a glitch with a change point due to the abnormal speed) ' That is, in the present invention, the display device is used to watch its value change or show its waveform change, which can easily detect that the stepping motor system will produce abnormal changes in the scan line. The resulting correction parameters can refer to = which-the scan line produces abnormal changes and the non-preset transmission

: In addition, the situation from five A to five C can also be applied to observe the change of the transmission gear set of the driving device, that is, when a certain tooth is shaped, the driving device will have a number of process mines to scan the Correct the pattern and display the spike at point a. At this time, you can find the problem by comparing === i + gear &

573429 Amendment No. 911U9.W V. Description of the invention (7) It is possible to generate a correction parameter. In addition, the present invention can also be used to scan the light source for the normal light source. If the light source has an unstable supply situation when the result of the scanning correction pattern is changed, then this unstable change will cause a flaw and unstable situation when the present invention can find out the position on the time axis. To use the source device, or use the light source to compensate for its unstable supply situation. The degree of the correction map provided by the present invention, and the change in relative colors are determined by the actual designer, and the corresponding design is made for the purpose of the scanner. Defects or errors generated can be detected by measuring less than three different levels. Furthermore, the invention could be implemented concretely and specifically, with the enhancement of special effects, and it is fully rich in the progressiveness of implementation, which can very clearly indicate the problem. Source stability, such as the original

This should maintain a stable waveform or value in the normal supply situation of the light source device. If the luminance value will also be unstable, one or some scan lines will appear. Which scan is on a single point (the designer can be found relatively) The light source device of the light source device can be seen, or the light compensation (using software or hardware) can be sent for repair. 'It has different light and dark contrasts and the number of required areas. F. Design of image correction method of optical scanner 'can scan and correct the scanning process of the scanner, through the correction pattern to the design' cooperation with the corresponding processing comparison invention provides a series of method flow, and can achieve The purpose to be achieved does not show the industrial use value of the purpose and effect of the present invention, and is the current market

52 ^ 429 I ------ Case No. Q11U outside 3. Explanation of the invention (8) The new invention of the five seesaws is in full compliance with the requirements of the invention patent. Examples, when not: range. That is to say, "everyone within the scope of the exclusive application according to the present invention" above should still belong to the patent prayer of the present invention. Yuebei Examiner's Mingjian and prayed for it

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Case No. 91114253 Brief description of the drawings (4) Brief description of the drawings. Figure: This is a schematic diagram of the three-dimensional structure of a conventional platform optical scanner. Figure 2 is a schematic diagram of a conventional calibration test pattern. FIG. FA is a preferred embodiment of the correction pattern of the present invention. FIG. 3B is another preferred embodiment of the calibration pattern of the present invention. Figure 4 is a flowchart of the method steps of the present invention. Figures 5A to 5C are waveform diagrams of the scanning correction pattern of the present invention. Explanation of drawing number: Scanner 10-Scan file 11-Housing 13-Drive unit 14-Guide bar 15-Scan window 16, 17, 18-Calibration pattern 180, 181, 182, 183 Area 160, 161, 170, 171 , 172 185, 186-scan line 2-image capture device 30-35

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Claims (1)

92. 11. 2 8 573429 Case No. 911142M 6. Application for Patent Scope 1. An image correction method of a photon scanner, which scans a calibration pattern by an image capturing device in the optical scanner, and scans the scanned image after scanning. The obtained results and preset parameters are processed. The steps include: a. Preparing a correction pattern with at least three color gradation ranges; b. The image capture device scans the correction pattern at a predetermined speed; C. obtain Scan the relative comparison value of the calibration pattern; d. Compare the preset relative parameters with the obtained relative comparison value. 2. The image correction method of the optical scanner according to item 丨 of the scope of the patent application, wherein the step d further includes an e 1 step, which outputs the result of the comparison process to a display device. 3. The image correction method of the optical scanner according to item 1 of the scope of the patent application, wherein the step d further includes an e2 step, which obtains correction parameters according to the results of the comparison process to correct the image scanning. 4. The image correction method of the optical scanner according to item 3 of the scope of patent application, wherein the step d further includes an e3 step, which outputs the result of the comparison process to a display device. 5. The image correction method of the optical scanner according to item 1 of the scope of the patent application, wherein the correction patterns of the three color range ranges are defined as different shades between black and white The range of degrees is a pattern design with three or more different ranges of light and dark contrast. 6. The method for image correction of an optical scanner according to item 1 of the scope of patent application, wherein step d is a relative comparison value obtained for at least three different color gradation ranges in the calibration pattern, and the comparison value is obtained from the comparison value. The calculation processing can show the prediction of each scanning line in the image scanning process. Page 13 Case No. 911142M Amendment 573429 6. The scope of the patent application setting. When a defect occurs during the scanning process, the preset value displayed by the scanning point generated by the defect is worth a relative change. 7. The image correction method of the optical scanner according to item 1 of the scope of patent application, wherein the method is used to show whether a driving device generates a non-preset transmission during the driving of the image capturing device. speed. 8. The image correction method of the optical scanner as described in item 7 of the scope of the patent application, wherein the driving process of the driving means refers to whether a stepping motor generates a non-preset step value. 9. The image correction method of the optical scanner according to item 7 of the scope of the patent application, wherein the driving process of the driving device refers to whether a gear set has a bad gear meshing during the rotation process. The method for correcting an image of an optical scanner as described in item i of the scope of patent application, wherein the method can show whether a light source device has a non-preset luminance change. Health ". :: Please :: Correction of the image of the optical scanner described in item 10 of the range Stable light exposure. The double-knife system says that the originator does not produce the light. According to the light method described in item 1 of the scope of the patent application, 苴 中 兮 TR is to evaluate the size of the shirt as the correction side-the size of the scanning window. . Slightly equivalent to 13 · —a type of optical scanner image scanning and correction device in the scanner, including the right: optical scanner, which can scan the image object ...: Calibration pattern, which has at least three-scanning means, The optical scans the target's surrounding pattern; Tian This Photon # Describing Device for this correction map coffee | Page 14 573429 Month _ Case No. 91114253 6. Apply for a patent scope description, you can get a preset by scanning the correction line The due performance of the correction pattern can be used to relatively obtain the performance when there is a defect in the scanner, and the relative correction parameters can be obtained. it = image correction set of the optical scanner as described in item 13 of the scope of patent application, wherein the correction pattern is defined as the relative lightness and darkness change between black 15 and white, and Designed for more than three patterns with different color levels. = The image correction device of the optical scanner described in the patent application No. 13 'wherein the optical scanner is further provided with a driving device, = is available-when the display device is executed by the scanning means, to view the image Whether non-preset assist speed is generated during the driving process of the insertion device. 16. = The calibration device of the optical scanner as described in the item of the scope of the patent application, wherein the driving process of the driving means refers to whether the one-step rotation process produces a non-preset step value. 1 7 · The optical scanner 18 device described in item 15 of the scope of the patent application, wherein the driving process of the driving device refers to whether or not a bad gear meshing occurs during the movement. -The group transferred the optical scanning device as described in item 13 of the scope of the patent application, wherein when the scanning method is performed, the image correction can be used to observe whether a light source device generates a non-preset display device 1 y Optical scanning as described in item 18 of the patent application. „: Device, where the non-predetermined brightness changes 俜 :: Correction of the taxi image Stable light exposure. 573429 92 "· 2 s _Case No. 91114253_ year and month correction_ VI. Patent application scope 2 0 · The image correction device of the optical scanner as described in item 13 of the patent application scope, wherein the size of the correction pattern, Approximately the size of one scan window in the scanner. Page 16