X-ray image enhancement method

Abstract

The invention relates to the technical field of image post-processing, in particular to an X-ray image enhancement method, which comprises the following steps of: selecting a self-adaptive sharpeningmode of a Laplace operator in a detail highlighting module to effectively realize image detail enhancement; in the contrast enhancement module, selecting a constrained local histogram equalization method, limiting noise and controlling over-enhancement of the contrast according to large gray level distribution difference of different areas; in the noise removing module, selecting a Gaussian filterand median filter combined mode, and random noise and salt and pepper noise in the image are effectively removed. The method has the advantages that for image defect features in X-ray practical application, the detail highlighting module, the contrast enhancing module and the noise removing module are complementarily combined for image enhancement; details and local processing are highlighted, and when the contrast ratio is enhanced, detail local optimization can be better highlighted; and the defect characteristics in actual use are improved, and high practicability is achieved.

Description

technical field [0001] The invention relates to the technical field of image post-processing, in particular to an X-ray image enhancement method. Background technique [0002] X-ray imaging is widely used in medical lesion inspection and industrial non-destructive testing. However, X-ray images usually have defects such as low contrast, insufficient edge clarity, and high noise. It is an effective way to suppress defects and improve image quality through image post-processing. means, the classical image enhancement methods are generally based on the spatial domain and the frequency domain. In view of the image defects in the practical application of X-ray, the effect of using a certain image enhancement method alone is not very satisfactory. [0003] The Chinese patent publication number is CN106570836A, and the name of the invention is a method for local enhancement of radiation images. The invention provides a method for local enhancement of radiation images. The method fo...

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Problems solved by technology

[0002] X-ray imaging is widely used in medical lesion inspection and industrial non-destructive testing, but X-ray images usually have defects such as low contrast, unclear edges, and large noise. It is an effective way to suppress defects and improve image quality through image post-processing. Methods, the classic image enhancement methods are generally based on two methods of space domain and frequency domain. For image defects in X-ray practical applications, the effect of using a certain image enhancement method alone is not very ideal

[0003] The Chinese patent publication number is CN106570836A, and the name of the invention is a method for local enhancement of radiation images. This invention provides a method for local enhancement of radiation images. The method focuses on dividing the image into bright and dark areas after normalization. Image enhancement is performed on the area respectively, and the Gaussian filter and the Laplacian sharpening filter are combined to enhance the edge contrast while eliminating noise, but X-ray images usually have low contrast, unclear edges, and high noise. major defects

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