A ray negative image exposure quality evaluation method based on main target area constraint
A target area and quality assessment technology, applied in the field of image processing, can solve the problems of unsuitable exposure quality evaluation of industrial radiographic negative images, large blackness, unsuitable exposure quality of negative images, etc., and achieve accurate exposure grayscale target value and threshold value , The evaluation speed is fast, and the verification results are accurate and reliable.
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[0038] figure 1 It is the regional division of the industrial radiographic negative film image provided by the embodiment of the present invention. The negative film image mainly includes five areas, wherein area 0 and area 1 are the part information of the base material of the film; area 2 is the information of the weld seam part of the film; area 3 and area 4 It has nothing to do with the film information, mainly due to the low detection accuracy of the film advance sensor of the digitizer and the slight vibration of the film during the movement, so in order to avoid the loss of the film information, the camera will collect an extra period before and after the acquisition starts and ends. Time, so that the blank parts of area 3 and area 4 appear. In area 0 and area 1, there are information such as typefaces and image quality meters. The typefaces indicate information such as welding construction date, pipeline number, and welding port number. The image quality meter is used ...
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