Real-time medical video image denoising method

A video image and image technology, applied in the field of medical video image denoising, can solve problems such as block effect or blurring of moving tissue edges

Inactive Publication Date: 2011-04-13
SHENZHEN LANDWIND IND
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  • Abstract
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Problems solved by technology

However, most of the existing medical video image denoising algorithms use filtering in the spatial or temporal domain alone, or a simple fusion of temporal and spatial filtering, which is prone to block effects or blurring of moving tissue edges

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Embodiment Construction

[0053] Below according to accompanying drawing and embodiment the present invention will be described in further detail:

[0054] As shown in the figure, a video image enhancement processing method, the image sequence is, g 1 ,..., g t ,..., g n , which includes the following steps:

[0055] A. Extract the image frame sequence from the image storage area, g(x, t)=g t , t=1,...,n; let t=2, do Bilateral filtering on g(x, t-1) to get a smooth image g st (x,t-1):

[0056] g st ( x , t - 1 ) = Σ y ∈ R ( x ) w ( x , y , t - 1 ) g ( y , t ...

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Abstract

The invention provides a real-time medical video image denoising method, which is applied to medical video image sequences which are acquired in real time or stored and performs time-space domain recursive filtering treatment of each frame of video image by using the high degree of correlation of two adjacent images, wherein the size of a filter window can be adaptively adjusted according to a noise level. In the invention, a time-domain motion compensating method and a space-domain denoising enhancement algorithm are combined, a movement area, a noise area and a background area are detected by applying a motion compensating method and a morphological operator according to the current pixels of the images, and the overall noise levels of the images are estimated in the noise area.

Description

technical field [0001] The invention provides a medical video image denoising method, in particular to a real-time medical video image denoising method. Background technique [0002] Medical video image sequences are often disturbed by noise due to acquisition sources, exposure parameters, and dose requirements, which degrades the image quality. For example, there is usually a large amount of speckle noise in medical ultrasound video images, which will significantly reduce the quality of ultrasound images and cover up some important tissue lesions, which brings great difficulties to doctors' diagnosis and identification of certain diseases. Greater difficulty, and there will be a risk of missed diagnosis and misdiagnosis. [0003] The filtering method is usually used to suppress the high-frequency part of the signal, and the useful edge information will be removed while filtering out the noise. Over-smoothing; thus, some filtering algorithms based on edge preservation have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/14H04N5/213G06T5/00
Inventor 徐漫涛张羽潘梁亮陆汇海
Owner SHENZHEN LANDWIND IND
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