Digital radiography (DR) contrast balancing method and system

A contrast and balanced technology, applied in the field of digital medical image processing, can solve the problems of difficult information display of different tissues, large difference between light and dark DR images, easy loss of natural grayscale change information, etc., to save workload and achieve good contrast. Effect

Active Publication Date: 2014-12-10
SHENZHEN ANGELL TECH
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method and system for equalizing the contrast of DR images, which solves the problem that existing DR images have large differences in brightn

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  • Digital radiography (DR) contrast balancing method and system
  • Digital radiography (DR) contrast balancing method and system
  • Digital radiography (DR) contrast balancing method and system

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Example Embodiment

[0056] Please refer to Figure 5 , The first embodiment of the present invention is:

[0057] First, input the image. In this example, select an abdominal orthographic image, the image size is 3072x3072; then in the second step, you need to input the position information of the abdomen; each position corresponds to the size of a rectangular area, This parameter is obtained through a large number of sample test statistics, and a lookup table is established. When applying, only need to find the corresponding rectangle size according to the body position; for each pixel of the image, find the maximum value and the maximum value within the set rectangle range. Minimum value, so that each pixel has a maximum value and a minimum value. These maximum and minimum values ​​constitute the maximum image MAX and the minimum image MIN respectively; because the maximum and minimum values ​​in a certain area are the same , So the maximum and minimum images can see obvious blocking effects, the...

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Abstract

The invention provides a digital radiography (DR) contrast balancing method. The DR contrast balancing method includes inputting image data and body position information; setting the size of a local area according to the body position information; selecting a rectangular area using each pixel point of the image data, wherein the size of the rectangular area is based on the size of the local area; calculating a pixel grey level maximum value and a pixel grey level minimum value of the rectangular area to obtain a first grey level maximum value image and a first grey level minimum value image; subjecting the first grey level maximum value image and the first grey level minimum value image to filter processing to obtain a second grey level maximum value image and a second grey level minimum value image; determining a corresponding histogram range of each pixel point of the input initial image data according to the corresponding second grey level maximum value image and the second grey level minimum value image; subjecting each pixel point to histogram linear extension processing according to the corresponding histogram ranges to obtain contrast balanced image data. According to the DR contrast balancing method, the problem that DR images greatly differ in brightness and are difficult to clearly display information of different tissue is solved.

Description

technical field [0001] The invention relates to the field of digital medical image processing, in particular to a method and system for equalizing the contrast of DR images. Background technique [0002] In the actual application of the existing DR image processing technology, due to the difference in the thickness of different tissues of the human body and the difference in the absorption rate of X-rays by different physiques of the human body, the brightness and darkness of the obtained DR images are quite different, and it is difficult to image the human body. The characteristic information of different organizations is displayed clearly at the same time. When doctors observe and diagnose in the later stage, they need to adjust and observe different areas of the image by manual means such as adjusting the window width and window technology, which not only affects the efficiency of diagnosis, but also consumes unnecessary time. The existing technology generally adopts the...

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Application Information

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IPC IPC(8): G06T5/40
Inventor 叶超杜碧陈娴杜静
Owner SHENZHEN ANGELL TECH
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