A Nonlocal Mean Filtering Method for 3D Ultrasound Images
A non-local mean, three-dimensional ultrasound technology, used in ultrasonic/sonic/infrasonic diagnosis, image enhancement, sonic diagnosis, etc., can solve problems such as poor filtering effect, loss of detailed information, etc. Image smoothing effect
Active Publication Date: 2016-04-13
WUHAN WESEE MEDICAL IMAGING CO LTD
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[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a non-local mean filtering method for 3D ultrasound images. grayscale information, thus solving the technical problems of poor filtering effect and loss of detail information in current 3D image filtering methods
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[0029] 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 the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0030] For a given 3D image, especially a 3D ultrasound image, such as figure 1 As shown, the specific steps of the non-local mean filtering method provided by the present invention are as follows:
[0031] (1) Load the 3D image information with the size of W×H×F.
[0032] (2) Determine the side length of the reference block and the distance between the centers of adjacent reference blocks, an...
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The invention discloses a filter method for three-dimensional ultrasonic images, and belongs to the field of three-dimensional image processing. The filter method includes loading a to-be-filtered three-dimensional ultrasonic image, splitting the to-be-filtered target three-dimensional ultrasonic image into reference blocks, and specifying a search area for each reference block; using all image blocks with the sizes identical to the size of each reference block in the corresponding search area as similar blocks and computing a similarity degree of each similar block and the corresponding reference block; using a weighted mean value of the corresponding similar blocks as a filter result of each reference block and a weight of the corresponding weighted mean value as a similarity degree of each reference block; integrating the filter results of the reference blocks to obtain a final filter result of the three-dimensional ultrasonic image. Compared with the prior art, the filter method has the advantages that the three-dimensional image can be directly filtered without being split into two-dimensional image frames to be filtered, and gray information among frames can be utilized, so that a filter effect can be obviously improved, and detail information of the image can be effectively preserved; the filter method is applicable to accelerating a GPU (graphics processing unit), so that the filter time can be greatly shortened.
Description
technical field [0001] The invention belongs to the field of three-dimensional image processing, and more specifically relates to a non-local mean filtering method for three-dimensional ultrasonic images. Background technique [0002] Three-dimensional ultrasound imaging has achieved research results in many aspects including basic theory, imaging technology, clinical experiments, etc., and has been paid more and more attention in clinical diagnosis. Three-dimensional ultrasound imaging technology can provide three-dimensional structural images of tissues and organs. Compared with traditional two-dimensional ultrasound, the image display is intuitive, and it is convenient for accurate measurement of medical diagnosis parameters. However, due to the coherent nature of ultrasound imaging, there is speckle noise in the image, and in the process of acquisition, conversion and transmission of 3D ultrasound images, it is easily affected by the interference of imaging equipment and...
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IPC IPC(8): G06T5/00A61B8/00
Inventor 侯文广李柳王学文翁飞张旭明丁明跃
Owner WUHAN WESEE MEDICAL IMAGING CO LTD