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Image correction method and device, X-ray photography equipment

An image correction and image technology, which is applied in the field of image processing, can solve problems such as SID deviation and correction that cannot achieve the expected effect, and achieve the effect of high accuracy and precision

Active Publication Date: 2018-08-03
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Claims
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Problems solved by technology

However, the status of the DR equipment in actual use may be inconsistent with the status of the DR equipment when the grid correction coefficient is obtained. For example, the SID of the DR equipment will deviate after a period of use. Difficulty, so after using the existing method to correct, the final correction will not achieve the expected effect

Method used

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  • Image correction method and device, X-ray photography equipment
  • Image correction method and device, X-ray photography equipment
  • Image correction method and device, X-ray photography equipment

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Embodiment Construction

[0052] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways than those described here, and those skilled in the art can make various changes without departing from the connotation of the present invention. Accordingly, the present invention is not limited to the specific embodiments disclosed below.

[0053] As described in the prior art, when correcting the image gray level unevenness caused by grid defocus and / or system misalignment in the prior art, it is necessary to obtain the grid in advance under pre-set conditions. The correction coefficient is used to correct the actually collected images....

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Abstract

The present invention discloses an image correction method and apparatus. The image correction method comprises the steps of acquiring a maximum gray value of pixels in each column in a direct exposure area of the image, and determining a variation trend of maximum gray values of columns, wherein the direction of the column is parallel to the direction in which a filter grid lead is; acquiring a target gray value according to the variation trend of maximum gray values of the columns in the direct exposure area of the image; and correcting the image according to the target gray value. The image correction method has good correction effect, and the corrected image is uniform in grayscale and meets actual clinical demands.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to an image correction method and device, and X-ray photography equipment. Background technique [0002] Digital X-ray (Digital Radiography, DR) photography equipment is an advanced medical system formed by the combination of computer digital image processing technology and X-ray radiation technology. Digital X-ray imaging equipment is widely used because of its low radiation dose, high image quality, high disease detection rate and diagnostic accuracy. [0003] X-rays will produce scattered rays after passing through the human body, which will cause the image to become blurred and reduce the contrast of the image, which is not conducive to the observation and diagnosis of lesions by doctors. Therefore, anti-scattering grids are usually used to eliminate the influence of scattered rays on the image. influences. For DR equipment, each lead strip of the grid is inclined at ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T7/70
CPCG06T5/003G06T7/0012G06T2207/10116
Inventor 张文日牛杰
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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