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Image contrast enhancement method and image acquisition medical device using the same

A technology of image contrast and medical equipment, applied in image enhancement, image analysis, image data processing, etc., can solve the problems of inconspicuous contrast improvement, image noise amplification, and excessive calculation, so as to improve subjective visual effect and enhance image , Improve the effect of image contrast

Active Publication Date: 2018-12-21
SINOSURGICAL HEALTHCARE TECH ZHEJIANG CO LTD
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Problems solved by technology

However, these algorithms often face problems such as image noise amplification, inconspicuous improvement in contrast, or excessive calculations.

Method used

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  • Image contrast enhancement method and image acquisition medical device using the same
  • Image contrast enhancement method and image acquisition medical device using the same
  • Image contrast enhancement method and image acquisition medical device using the same

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Embodiment Construction

[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0017] The invention discloses an image contrast enhancement method, comprising the following steps:

[0018] Step 1, performing wavelet decomposition on the image to be processed to obtain a low-frequency image and a high-frequency image;

[0019] Step 2, performing contrast enhancement on the low-frequency image obtained in step 1 based on Gamma correction;

[0020] Step 3, denoising the high-frequency image obtained in step 1;

[0021] Step 4: Perform wavelet inverse transform on the low-frequency image processed in step 2 and the high-frequency image processed in step 3 to obtain a final image with enhanced contrast.

[0022] Among them, in the wavelet decomposition step of step 1, wavelet transform is performed on ...

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Abstract

The invention relates to an image contrast enhancement method and an image acquisition medical device thereof, belonging to the technical field of digital image processing, aiming at solving the problem that the contrast of the existing Gamma corrected image is not high. The method includes four steps: image wavelet decomposition, contrast enhancement of low frequency image based on Gamma correction, high frequency image denoising and wavelet inverse transform. Through the above steps, the image noise can be effectively suppressed, the image brightness distribution can be improved, the image contrast can be improved, and the subjective visual effect of the image can be enhanced.

Description

technical field [0001] The invention belongs to the technical field of digital image processing, and in particular relates to an image contrast enhancement method and image acquisition medical equipment using the method. Background technique [0002] Image enhancement is an important preprocessing step in image processing. It can effectively improve the quality of the image, improve the subjective visual effect of the image, and highlight its useful features. Gamma correction is one of the most widely used image enhancement algorithms. Gamma correction uses a power function to correct the gray level of the image to achieve the purpose of improving the brightness distribution of the image. But when the power exponent is small, the contrast of the Gamma-corrected image is often low. In order to solve this problem, researchers have proposed a large number of correction algorithms based on Gamma correction. However, these algorithms often face problems such as image noise am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T2207/20064G06T5/70
Inventor 袁艳阳黄立东谢文亮
Owner SINOSURGICAL HEALTHCARE TECH ZHEJIANG CO LTD
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