Hierarchical segmentation method for OCT (Optical Coherent Tomography) image of optic disc region based on spatial continuity constraints

A technology of spatial continuity and segmentation algorithm, which is applied in the field of medical image processing and image segmentation, and can solve problems such as high time complexity and decreased segmentation accuracy

Active Publication Date: 2018-12-07
CENT SOUTH UNIV
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However, compared with other types of algorithms, most algorithms based on graph theory have higher time com

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  • Hierarchical segmentation method for OCT (Optical Coherent Tomography) image of optic disc region based on spatial continuity constraints
  • Hierarchical segmentation method for OCT (Optical Coherent Tomography) image of optic disc region based on spatial continuity constraints
  • Hierarchical segmentation method for OCT (Optical Coherent Tomography) image of optic disc region based on spatial continuity constraints

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Embodiment Construction

[0053] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0054] The present invention proposes a method for hierarchical segmentation of OCT images in the optic disc region based on spatial continuity constraints, such as figure 1 As shown, it includes four steps: first, noise reduction and ROI region segmentation are performed on the image to reduce the influence of speckle noise and high reflection areas on the segmentation results; then, the vascular shadows in the retinal OCT image are located; and then the vascular shadows are combined The location information and the A-scan segmentation algorithm segment the preprocessed image to obtain a rough segmentation result; finally, the spatial continuity constraint is used to optimize the segmentation result to obtain a final and more accurate segmentation result.

[0055] A method for hierarchical segmentation of OCT images of optic disc regions based on spati...

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Abstract

The invention discloses a hierarchical segmentation method for an OCT (Optical Coherent Tomography) image of an optic disc region based on spatial continuity constraints. The method comprises the steps of firstly removing speckle noise in the OCT image by using a BM3D algorithm; then mutually separating multiple high-reflection regions in the image by using an ROI (Region of Interest) segmentationmethod based on the fuzzy C-means and active contour; then positioning the vascular shadow by using an ROI region image; sequentially segmenting the ROI by using an A-scan segmentation algorithm, correcting an initial segmentation result of each image by using a vascular shadow region; and finally optimizing the corrected segmentation results by using the spatial continuity constraints to obtainsegmentation boundaries of an ILM (Internal Limiting Membrane), an IS-OS (Inner segment-Outer segment) and a BM (Bruch membrane). Disclosed by the invention is an effective hierarchical segmentation method for the OCT image of the optic disc region, is high in segmentation accuracy and has certain robustness for the speckle noise and vascular shadow.

Description

technical field [0001] The invention belongs to the technical field of medical image processing and image segmentation, and in particular relates to a hierarchical segmentation method of OCT images in an optic disc region based on spatial continuity constraints. Background technique [0002] Since the introduction of Spectial-Domain Optical Coherence Tomography (SD-OCT) imaging technology, it has been widely used in modern ophthalmic medical imaging diagnosis due to its non-invasive characteristics in the imaging process. Compared with traditional medical imaging technologies such as fundus cameras and ultrasound, SD-OCT can obtain more abundant three-dimensional structural information of physiological tissues, and provide more comprehensive assistance for doctors' clinical diagnosis. [0003] Common eye diseases, such as glaucoma and age-related macular degeneration (Age-related Macular Degeneration, AMD), etc., are mostly retinal diseases. When these ophthalmic diseases o...

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Application Information

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IPC IPC(8): G06T7/11
CPCG06T7/11G06T2207/20116G06T2207/30041G06T2207/20016G06T2207/30101
Inventor 陈再良魏浩沈海澜彭鹏刘晴李大宝莫玉芳曾梓洋孙钺尧
Owner CENT SOUTH UNIV
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