Horizontal set image segmentation method of frequency-domain boundary energy model

A boundary energy, image segmentation technology, applied in the field of image processing, can solve problems such as limitations

Active Publication Date: 2015-12-23
CHINA THREE GORGES UNIV
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Problems solved by technology

However, in medical images, due to the limitation of imaging technology level, the acquired images often contain strong noise or offset field

Method used

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  • Horizontal set image segmentation method of frequency-domain boundary energy model
  • Horizontal set image segmentation method of frequency-domain boundary energy model
  • Horizontal set image segmentation method of frequency-domain boundary energy model

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Embodiment

[0064] Due to the particularity of the present invention, in this embodiment Figure 1 to Figure 8 It is inevitable to use grayscale images. However, those skilled in the art can understand the content of the present invention based on the written description of the present invention without relying on the contents of the drawings of the embodiments.

[0065] Such as Figure 9 As shown, the present invention discloses a level set image segmentation method of a frequency domain boundary energy model, which includes the following steps: Step 1, within the range of the image area Ω, Fourier transform is performed on the inner and outer areas of the initialized contour. The detailed steps are as follows:

[0066] Step 1-1, for an input image u defined on Ω 0 (Such as figure 1 shown), the image u 0 Each pixel on corresponds to a coordinate vector x on Ω. Set the initialization profile C on Ω by an interactive method 0 ,Such as figure 2 shown. Assume that at time t, the in...

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Abstract

The present invention provides a horizontal set image segmentation method of a frequency-domain boundary energy model. The method comprises a step of carrying out Fourier transform on the contour inner and outer areas of an input image, a step of designing a frequency-domain filter to filter the contour inner and outer areas so as to extract a boundary energy term, a step of taking a horizontal set function regular term, a length constraint term and the boundary energy term as an overall energy items, a step of combining a step function and an impulse function, using a horizontal set method to minimizing the energy item, and thus obtaining an ideal segmentation result. According to the horizontal set image segmentation method of a frequency-domain boundary energy model, a band-pass filter and an optimal filter are used to extract object boundary information, other interference information such as strong noise, a bias field and regular texture are eliminated, the smoothness of a segmentation result boundary can be controlled, and the high precision segmentation result of a medical image with strong noise and a bias field at the same time can be obtained.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a level set image segmentation method of a frequency domain boundary energy model capable of effectively segmenting images. Background technique [0002] Image segmentation has always been a research hotspot and difficulty in the field of image processing. Its purpose is to divide an image into several sub-regions with the same characteristics, such as brightness, texture, density, etc. Image segmentation is a critical step for advanced imaging such as image analysis, object recognition, image understanding, and computer vision. Image segmentation is widely used in medical field, security system, military field and many other fields. Although after years of research, many scholars have proposed a large number of effective image segmentation algorithms, but there is no general effective algorithm for image segmentation. For different application scenarios, it is often ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
CPCG06T2207/20056
Inventor 孙水发郭青董方敏李准陈晓辉邹耀斌潘幸子
Owner CHINA THREE GORGES UNIV
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