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System for correcting unsaturated artifact of image and correction method

A correction method and a technology for correcting images are applied in the field of systems for correcting image desaturation artifacts, which can solve problems such as reducing the dynamic range of detectors, and achieve the effects of wide application range, elimination of image desaturation artifacts, and high integration.

Active Publication Date: 2018-09-28
SHANGHAI IRAY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a system and correction method for correcting image unsaturation artifacts, which are used to solve the problem of reducing the dynamic range of the detector when eliminating unsaturation artifacts in the prior art. question

Method used

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  • System for correcting unsaturated artifact of image and correction method
  • System for correcting unsaturated artifact of image and correction method
  • System for correcting unsaturated artifact of image and correction method

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Experimental program
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Embodiment 1

[0050] Such as figure 2 As shown, this embodiment provides a method for correcting image desaturation artifacts, and the method for correcting image desaturation artifacts includes:

[0051] Acquire the first image and the second image, mark the pixels whose gray value exceeds the first set gray level in the first image, and mark the pixels whose gray value exceeds the second set gray level in the second image Pixels are marked.

[0052] Specifically, in this embodiment, the first image is an original image, and the second image is a corrected image after compensation correction (offset), gain correction (Gain), and defect correction (Defect).

[0053] More specifically, the exposure acquisition process is started, and the flat-panel detector acquires a bright field image as the original image; then the correction process is started to perform compensation correction, gain correction, and defect correction on the original image (the order of correction is not limited) The corrected...

Embodiment 2

[0063] Such as image 3 As shown, this embodiment provides a method for correcting image desaturation artifacts. The difference from the first embodiment is that the first image is a first corrected image, and the second image is a second corrected image.

[0064] Specifically, the method of acquiring the first corrected image and the second corrected image includes: starting an exposure acquisition process, a flat-panel detector acquires a bright field image, and then starting a correction process to perform a first correction and a second correction on the bright field image Two corrections to obtain a first corrected image and a second corrected image. In this embodiment, the first corrected image is an image after compensation correction of the bright field image, and the second corrected image is an image after compensation correction and defect correction of the bright field image.

[0065] It should be noted that the first corrected image and the second image are images afte...

Embodiment 3

[0068] Such as Figure 4 As shown, the present invention also provides a method for correcting image desaturation artifacts. The difference from the first embodiment is that the first image is a corrected image, and the second image is all images in the flat panel detector through the The image to be output after image processing.

[0069] Specifically, the method of acquiring the corrected image and the image to be output includes: starting an exposure acquisition process, a flat-panel detector acquires a bright field image, and then starting a correction process to correct the bright field image to obtain the corrected image ; Perform further image processing on the corrected image to obtain the image to be output. The corrected image includes but is not limited to an image after any one or two or three of compensation correction, gain correction, and defect correction. The image to be output includes, but is not limited to, correction, denoising, enhancement, restoration, seg...

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Abstract

The invention provides a system for correcting an unsaturated artifact of an image and a correction method, and the method comprises the steps: acquiring a first image and a second image, and markingpixels with gray value exceeding a first set gray level in the first image, and the pixels with the gray values exceeding a second set gray level in the second image; setting the gray values of all the marked points in the first image and the second image to a third value gray value for output if there are marked points in the first image and the second image, and achieving grayscale truncation tocorrect for the unsaturated artifact; and performing no grayscale truncation if there is no marked point in the first image or the second image. The method achieves a purpose of eliminating the unsaturated artifact of the image on the basis that the hardware cost is not increased, improves the image quality, is high in integrity, is high in flexibility, and is wide in application range.

Description

Technical field [0001] The invention relates to the field of X-ray flat-panel detectors, in particular to a system and a method for correcting image unsaturated artifacts. Background technique [0002] Amorphous silicon X-ray flat panel detectors convert X-rays into visible light through a scintillator, and then realize photoelectric conversion by an amorphous silicon sensor, then digitize it through a readout circuit and transmit it to a computer to form a displayable digital image. Amorphous selenium X-ray flat panel detectors directly perform photoelectric conversion on X-rays, and the digital conversion method is the same as that of amorphous silicon flat panels. The images of such digital flat-panel detectors all have displayable gray limit values ​​(saturation values). In actual use, under high-dose shooting conditions, the non-object areas in the obtained image show saturated gray values, but some areas have gray values ​​lower than the saturated value, which is called un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/00
CPCG06T11/008
Inventor 张忠祥张楠
Owner SHANGHAI IRAY TECH