Strip gap detection method

A detection method and fringe technology, applied in image data processing, instrumentation, computing, etc., can solve problems such as edge blur, edge non-single pixel width, weak edge loss, etc., and achieve the effect of easy fringe width

Inactive Publication Date: 2012-03-28
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0006] In order to overcome the unsatisfactory edge extraction effect of existing edge detection operators for images with complex edges and uneven illumination, such as edge blurring, edge non-single pixel width, weak edge loss, overall edge discontin

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with accompanying drawing:

[0030] The flow chart of the present invention is as figure 2 As shown, steps are included: 1. Smoothing and filtering the original image; 2. If the noise is large, multiple times of smoothing and filtering can be performed; 3. Edge extraction is performed on the filtered image; 4. Block threshold segmentation is performed on the image after edge extraction; 5. Use the image after thresholding to draw edge lines.

[0031] Each step is as follows:

[0032] Step 1: Smoothing and filtering the original image

[0033] In the process of image acquisition and transmission, it is often doped with various noises, resulting in a decrease in the quality of the image, which causes great difficulties in the edge extraction of the image. In order to perform better edge extraction, filtering must be performed first.

[0034] Step 2: If the noise is large, multiple smoothing filters c...

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Abstract

The invention relates to a strip gap detection method, and belongs to the technical field of digital image processing. The strip gap detection method comprises the following steps of: carrying out smoothing filtering on an original image, and if the noise is higher, carrying out smoothing filtering for multiple times; carrying out edge extraction on the filtered image; judging whether the edge ofthe image subjected to the edge extraction is too wide, if so, repeating the previous process, or carrying out block threshold division on the image subjected to the edge extraction; and drawing edgelines by utilizing the image subjected to block threshold division, and thus figuring out the strip gap. According to the strip gap detection method, the influence of noise, illumination condition and other external factors is overcome, the edge lines of a single-pixel strip can be rapidly and accurately drawn, and the strip width is figured out.

Description

technical field [0001] The invention relates to a fringe gap detection method. It belongs to the technical field of digital image processing. Background technique [0002] Stripe gap detection is to calculate the width of stripes by extracting the edge lines of stripes. Its core content is edge detection. Edge detection is one of the important techniques of image feature extraction, which is used to segment different objects or extract image edges. The fringe gap detection method can be used to detect various fringe gaps such as grating gaps. [0003] At present, there is no specific fringe gap detection method proposed for fringe images, but there are many known edge detection methods, mainly including primary differential operators such as Sobel operator and Robert operator, and secondary differential operators such as Laplace operator. , template operation operators such as Prewitt operator, Kirsch operator, etc. [0004] The convolution template of the Sobel edge oper...

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Application Information

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IPC IPC(8): G06T7/00
Inventor 韩希珍赵建隋龙
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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