Structure of IPL Linear Image Sensing System with Image Placement Offset Compensation Function

Abstract

An IPL linear image sensing system structure with image placement offset compensation function includes: an image capturing module comprising multiple image chips connected in parallel, the image chips being arranged vertically and horizontally in an interleaved manner and attached to a substrate; each image chip forming a scanned image corresponding to the scanned object after scanning an object; a region adjustment module connected to the image capturing module, used to capture a preset area of ​​fixed size in the overlap of scanned images acquired by adjacent image chips as an adjustment region; and an image displacement compensation module connected to the region adjustment module, used to translate the adjustment region by integer pixels in the horizontal and vertical directions to generate a displaced image; the image displacement compensation module aligns and adjusts adjacent scanned images according to a set value.

Claims

1. An IPL linear image sensing system structure with image placement offset compensation function, comprising: an image capturing module including multiple image chips connected in parallel, the image chips being arranged vertically and horizontally in an interleaved manner and attached to a substrate; each image chip forming a scanned image corresponding to the scanned object after scanning an object; a region adjustment module connected to the image capturing module, used to capture a preset area of ​​fixed size at the overlap of scanned images acquired by adjacent image chips as an adjustment region; an image displacement compensation module connected to the region adjustment module, used to translate the adjustment region by integer pixels in the horizontal and vertical directions to generate a displaced image; the image displacement compensation module aligns and adjusts adjacent scanned images according to a set value, wherein the set value includes... An initial setting and a correction setting; the initial setting is an automatic stitching parameter used during initial imaging to adjust adjacent scanned images along both the X and Y axes; the X-axis adjustment adjusts the number of overlapping pixels between two images; the initial setting is generated during the manufacturing of the image capturing module based on the actual configuration of the mechanical structure, thus obtaining an initial image during imaging and automatic stitching; however, the initial image may still have errors at the stitching point, and a completely seamless stitching effect cannot yet be achieved; the correction setting is further calculated based on the errors at the stitching point of the initial image; these errors are obtained through image comparison or feature alignment; adding the correction setting to the initial setting gives the complete setting, which includes translation compensation for the X and Y axes.

2. The IPL linear image sensing system structure as described in claim 1, wherein the image chip is a linear image sensing chip, that is, the CMOS array on the image chip is linearly arranged.

3. The IPL linear image sensing system structure as described in claim 1, wherein each image chip has linearly arranged CMOS elements on its X-axis edge, and the CMOS elements of adjacent image chips are arranged in the closest possible manner.

4. The IPL linear image sensing system structure as described in claim 1, wherein the substrate is an FR-4 glass fiber board.

5. The IPL linear image sensing system structure as described in claim 1 further includes an output module connected to the image displacement compensation module for outputting the displacement image as a result image; the output module performs edge correction on the compensated image before outputting it to form a complete scan image without obvious image discontinuity.

6. The IPL linear image sensing system structure as described in claim 1, wherein the scanned image is subjected to pixel amplification processing to facilitate finer displacement adjustment.

7. The IPL linear image sensing system structure as described in claim 1 further includes an image zoom-in / zoom-out module disposed between the image capturing module and the area adjustment module, for zooming in / out and resampling the scanned image according to the zoom-in / zoom-out ratio to generate a resampled image.

8. The IPL linear image sensing system structure as described in claim 7, wherein the magnification is 4.

9. The IPL linear image sensing system structure as described in claim 1 further includes a lookup table for recording the final horizontal and vertical translation compensation parameters corresponding to the overlapping points of adjacent image chips.

10. The IPL linear image sensing system structure as described in claim 1 further includes a calibration image, the calibration image including at least one test pattern with geometric features; wherein the geometric features include straight lines, oblique lines, curves or edges or any combination thereof, and the angle can be any angle; wherein the test pattern includes multiple sets of line graphics with different directions or different angles.

11. The IPL linear image sensing system structure as described in claim 10, wherein multiple image chips scan the corrected image to generate a scanned image, analyze the image feature offset at the overlap, calculate the corresponding translation compensation parameters, and record them in a lookup table.

12. An IPL linear image sensing system structure for image placement offset compensation using a lookup table, comprising: an image capturing module comprising multiple image chips connected in parallel, the image chips being arranged vertically and horizontally in an interleaved manner and attached to a substrate; each image chip forming a scanned image corresponding to the scanned object after scanning an object; a region adjustment module connected to the image capturing module, used to capture a preset region of fixed size at the overlap of scanned images acquired by adjacent image chips as an adjustment region; an image displacement compensation device comprising: a parameter storage module for storing a lookup table, the lookup table containing multiple sets of translation compensation parameters in the horizontal and vertical directions corresponding to different scanned image regions; an image processing module connected to the parameter storage module and the image capturing module, used to receive scanned images and perform integer pixel translation compensation on the corresponding regions according to the lookup table; and an output module connected to the image processing module for outputting the translation-compensated image.

13. The IPL linear image sensing system structure as described in claim 12, wherein the image chip is a linear image sensing chip, that is, the CMOS array on the image chip is linearly arranged.

14. The IPL linear image sensing system structure as described in claim 12, wherein each image chip has linearly arranged CMOS elements on its X-axis edge, and the CMOS elements of adjacent image chips are arranged in the closest possible manner.

15. The IPL linear image sensing system structure as described in claim 12, wherein the substrate is an FR-4 glass fiber board.

16. The IPL linear image sensing system structure as described in claim 12, wherein the scanned image is subjected to pixel amplification processing to facilitate finer displacement adjustment.

17. The IPL linear image sensing system structure as described in claim 12 further includes a calibration image, the calibration image including at least one test pattern with geometric features; wherein the geometric features include straight lines, oblique lines, curves or edges or any combination thereof, and the angle can be any angle; wherein the test pattern includes multiple sets of line graphics with different directions or different angles.

18. The IPL linear image sensing system structure as described in claim 17, wherein multiple image chips scan the corrected image to generate a scanned image, analyze the image feature offset at the overlap, calculate the corresponding translation compensation parameters, and record them in a lookup table.

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