Method for suppressing speckle noise of OCT image

A technology of noise suppression and point noise, which is applied in the field of suppression of scattered point noise in OCT images, to achieve the effect of less insertion calculation, increased computing power, and less information loss

Active Publication Date: 2018-12-07
杭州富扬科技有限公司
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However, these techniques require multiple acquisitions at the same location i...

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  • Method for suppressing speckle noise of OCT image
  • Method for suppressing speckle noise of OCT image
  • Method for suppressing speckle noise of OCT image

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[0050] The present invention will be described in further 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.

[0051] Embodiments of the present invention and its implementation process are as follows:

[0052] 1) Use a common OCT system to collect a batch of OCT images of pearl samples as the target object; figure 2 is an OCT image of a seawater nucleated pearl.

[0053] 2) Perform curve smoothing for each column of data in the image; the image resolution of the OCT system is 512*512, the length of the image data column is 512, and the bit width is 8 bits, so the range of the gray value is 0-255;

[0054] 2) Perform curve smoothing for each column of data in the image; the image resolution of the OCT system is 512*512, the length of the image data column is 512, and the bit width is 8 bits, so the ...

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Abstract

The invention discloses a method for suppressing speckle noise of an OCT image. The method for suppressing speckle noise of an OCT image includes the steps: acquiring an OCT image of a target object by an OCT system, performing curve smoothing on column data, performing wavelet transformation on a column of data after curve smoothing, constructing four window functions with different window width,performing windowing processing on the column data after wavelet transformation, solving weighted average for the four windowed data, then performing wavelet inverse transformation to obtain column data after noise suppression, and performing stitching processing on each column of data to obtain an OCT image after noise suppression. The method for suppressing speckle noise of an OCT image maximally maintains the detail features, improves the detail quality of OCT imaging, is conductive to improvement of the speed of noise reduction, and can be used for online noise reduction applications.

Description

technical field [0001] The invention belongs to the field of biological image processing, and relates to an OCT image processing method, in particular to a method for suppressing scattered point noise of an OCT image. Background technique [0002] Optical coherence tomography (OCT) is a high-resolution cross-sectional imaging technique that achieves imaging by collecting photons of back-reflected light from microstructures in the sample surface area and interfering with light from a reference optical path. OCT equipment was first used in the in vivo analysis of biological tissues, mainly in the field of ophthalmology; OCT can be used to perform high-resolution imaging of cornea, retina, lens and other structures, photograph macular diseases, measure the thickness of optic nerve fibers, monitor and diagnose retinal diseases, and measure Retinal structure, etc., so that eye symptoms such as macular degeneration and glaucoma can be diagnosed at an early stage, and there is almo...

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Application Information

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IPC IPC(8): G06T5/00G06T5/10
CPCG06T5/002G06T5/10G06T2207/10101G06T2207/20064
Inventor 周扬陆扬陈正伟刘铁兵陈才施秧
Owner 杭州富扬科技有限公司
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