Method and device for image adjustment

Abstract

The invention discloses an image adjustment method. For an initial image obtained based on digital X-ray imaging technology, a determination can be made for each pixel according to the grayscale distribution of each pixel in the initial image to reflect the X-ray energy at the pixel. Density coefficient of density. The initial high-frequency image and low-frequency image obtained after the initial image is filtered and decomposed can be enhanced by amplifying the original high-frequency information corresponding to each pixel in the initial high-frequency image according to the density coefficient of each pixel in the initial image. frequency image. Therefore, in the target image reconstructed by enhancing the high-frequency image and the low-frequency image, the contrast of different density areas can reach an appropriate level at the same time, so that when the image is displayed, the detail information of different density areas in the image can reach a better level at the same time. display effect.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an image adjustment method and device. Background technique [0002] At present, digital X-ray photography imaging technology has been widely used in many fields, such as human tissue imaging in the medical field. In digital radiography imaging technology, a flat panel detector is used to receive X-rays to obtain digital image signals, which can be used to form images. In the image obtained based on the digital radiography imaging technology, since the objects of the image usually have a large difference in density, there will be a large contrast difference in the image. For example, in the human tissue image obtained based on the digital X-ray imaging technology, due to the large difference in the density distribution of the human tissue, some parts of the image have strong contrast and some parts have weak contrast. However, in the case that there is a large ...

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Problems solved by technology

However, when the prior art magnifies the high-frequency image, it does not take into account the large contrast difference between the regions with different X-ray densities in the image, and the regions with different X-ray densities in the image use the same magnification factor, so It will make it difficult for the contrast of different density areas to reach an appropriate level at the same time, and the contrast of the low-density area is appropriate but the contrast of the high-density area is insufficient, or the contrast of the high-density area is appropriate but the contrast of the low-density area is excessively enlarged.

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