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Optical fiber image processing method based on nonuniform correction

A non-uniformity correction and image processing technology, applied in image data processing, image enhancement, image analysis, etc., can solve the problems of inability to process the black spot of the fiber core, incomplete edge of the fiber image, and prone to judgment errors, etc. Remove dark spots and bright spots, accurate judgment, reasonable design effect

Active Publication Date: 2018-03-09
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This algorithm is prone to misjudgment when judging the position of the fiber, resulting in incomplete and mishandled fiber image edges
At the same time, the black spot at the fiber core cannot be processed

Method used

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  • Optical fiber image processing method based on nonuniform correction
  • Optical fiber image processing method based on nonuniform correction
  • Optical fiber image processing method based on nonuniform correction

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Embodiment Construction

[0037] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0038] Such as figure 1 In the optical fiber microscopic imaging system shown, the light source 1 irradiates the optical fiber 2 along the horizontal direction, due to the difference in refractive index between the air, the fiber cladding and the fiber core, and the object distance between the core and the edge of the fiber relative to the high-power microscope 3 Different, so it will produce bright and dark images on the focal plane, when the average brightness of the background is 130, its dark spot optical fiber image is as figure 2 As shown, its grayscale histogram is as image 3 shown. The fiber image 4 displayed on the liquid crystal screen mainly includes three parts, namely the fiber cladding 5 , the fiber core 6 and the image background 7 . The range of the gray level of the fiber cladding 5 is far from the image background 7, so it...

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Abstract

The invention discloses an optical fiber image processing method based on nonuniform correction and belongs to the field of optical fiber image processing. The optical fiber image processing method comprises the steps that an optical fiber wrapping layer, an optical fiber core and an image background in an optical fiber image are divided to determine a gray scale interval needing nonuniform correction, images different in illumination intensity under the same optical fiber microscope lens are selected as calibration images and calibration parameters are determined, and calibration parameters are utilized to perform nonuniform correction by using a two-point correction algorithm. By adopting the optical fiber image processing method, black spots and hot spots in the optical fiber image background are effectively removed under the condition that fewer hardware resources are occupied, accordingly the interference of image defects to optical fiber variety and position identification is reduced, and the optical fiber alignment accuracy is improved.

Description

technical field [0001] The invention belongs to the field of optical fiber image processing, in particular to an optical fiber image processing method based on non-uniformity correction. Background technique [0002] During the working process of the optical fiber fusion splicer, dust or oil may adhere to the lens of the microscope objective lens, resulting in black spots or bright spots on the fiber image. Generally, there are two processing methods: the first is based on the calibration of two-point non-uniformity However, the general non-uniformity correction algorithm is only effective in the gray-scale range where the response area is approximately linear, and it will cause serious distortion when processing images with a wide gray-scale range. The second is to use hardware to process the source data of the optical fiber image. First, the position of the optical fiber in the image is judged, and then the area where the optical fiber is located is calibrated, and the ima...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/80G06T7/11G06T7/136G06T5/00
CPCG06T7/11G06T7/136G06T7/80G06T5/00
Inventor 何春尚守锋杨小光任晓楠
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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