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Edge evaluation method, edge detection method, image correction method, and image processing system

An evaluation method and image processing technology, which can be used in image data processing, image enhancement, image analysis, etc., and can solve problems such as accuracy reduction.

Inactive Publication Date: 2009-12-30
SHIMADZU SEISAKUSHO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are either manual preprocessing or loss of accuracy in case of deviations from assumptions

Method used

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  • Edge evaluation method, edge detection method, image correction method, and image processing system
  • Edge evaluation method, edge detection method, image correction method, and image processing system
  • Edge evaluation method, edge detection method, image correction method, and image processing system

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Experimental program
Comparison scheme
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Embodiment 1

[0081] 【0030】

[0082] Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings.

[0083] figure 1 It is a block diagram showing a schematic configuration of the X-ray imaging device according to the first embodiment.

[0084] 【0031】

[0085] The desktop 1 is made of an X-ray transparent material or the like, and an object M to be inspected is placed thereon. The X-ray tube 3 and the flat-panel X-ray detector (hereinafter, referred to simply as “FPD” as appropriate) 5 are arranged to face each other with the desktop 1 interposed therebetween. The X-ray tube 3 irradiates the subject M with X-rays. The FPD 5 detects the X-rays transmitted through the subject M and outputs a detection signal corresponding to the intensity of the X-rays. The X-ray tube 3 and the FPD 5 are connected to an imaging control unit 7 , and an operation unit (not shown) is connected to the imaging control unit 7 . The operation unit receives an instruction ...

Embodiment 2

[0155] 【0063】

[0156] Hereinafter, Embodiment 2 of the present invention will be described with reference to the drawings. Figure 7 It is a block diagram showing a schematic configuration of the X-ray imaging device according to the second embodiment. In addition, the same reference numerals are assigned to the same configurations as in the first embodiment, and detailed description thereof will be omitted.

[0157] 【0064】

[0158] The image processing unit 13 in the second embodiment includes an image correction unit 26 that performs arithmetic processing for correcting input image data based on the edge degree. In the present embodiment, the image correcting unit 26 generates a corrected image in which the pixel value of each pixel is replaced with a gradation value corresponding to the degree of the edge.

[0159] 【0065】

[0160] Next, the operation of the X-ray imaging device according to the second embodiment will be described focusing on the processing in the image...

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PUM

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Abstract

An image processing system comprises a variation calculation unit for calculating the variations of the pixel value of each pixel with respect to adjacent pixels and an edge degree calculating unit for calculating the edge degree for an arbitrary single pixel, in which the degree of certainty whether the single pixel corresponds to an edge undergoes a numeric conversion on the basis of each of the variations of this single pixel and a peripheral pixel group including pixels surrounding the single pixel. The image processing system having this structure can accurately evaluate whether a pixel corresponds to an edge or not, even if the pixel is receiving noise.

Description

technical field [0001] 【0001】 [0002] The present invention relates to an edge evaluation method, an edge detection method, an image correction method, and an image processing system, and particularly relates to a technique for evaluating the possibility that pixels constituting image data are edge portions. Background technique [0003] 【0002】 [0004] Conventionally, edge detection has been performed on image data obtained from an X-ray imaging device, a non-destructive inspection device, or the like. This processing is an important step that is often used for image quality improvement such as avoiding artifacts of upper and lower luminance differences, automatic detection of tissues / lesions, and the like. [0005] 【0003】 [0006] The most basic method is to take the difference from the pixel value of an adjacent pixel, and if the difference is large, use that pixel as an edge portion / tissue boundary portion. In addition, there is also a method of applying a high pass...

Claims

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Application Information

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IPC IPC(8): G06T7/60
CPCG06T2207/30004G06T2207/10116G06T7/0085G06T7/13G06T7/00G06T9/20
Inventor 冈村升一
Owner SHIMADZU SEISAKUSHO CO LTD