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Image correction method and apparatus, and X-ray photographing device

An image correction and image technology, applied in the field of image processing, can solve problems such as correction not reaching the expected effect, SID deviation, etc., and achieve the effect of high accuracy and precision

Active Publication Date: 2017-05-10
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

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  • Image correction method and apparatus, and X-ray photographing device
  • Image correction method and apparatus, and X-ray photographing device
  • Image correction method and apparatus, and X-ray photographing device

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Embodiment Construction

[0052] In order to make the above-mentioned objectives, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, specific details are set forth in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make various changes without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0053] As described in the prior art, in the prior art, when correcting the uneven grayscale of the image caused by the defocus of the grid and / or the system misalignment, it is necessary to obtain the grid in advance under preset conditions. The correction coefficient, and then the actual co...

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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 present 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 photography equipment is widely used because of its low radiation dose, high image quality, high disease detection rate and high 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 the disease by the doctor. Therefore, anti-scatter grids are usually used to eliminate the effects of scattered rays on the image. influences. For DR equipment, each lead strip of the grid is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T7/70
CPCG06T7/0012G06T2207/10116G06T5/73
Inventor 张文日牛杰
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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