Laser additive manufacturing diffuser crack defect DR detection image processing method

An image detection and laser additive technology, applied in image data processing, image enhancement, image analysis, etc., can solve the problems of less detailed information, unable to enhance target details, low brightness, etc., to improve image contrast and enhance image edge effects , Enhance the effect of image detail information

Active Publication Date: 2020-12-29
NANCHANG HANGKONG UNIVERSITY +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

For low-contrast and low-brightness DR images with little detail information, traditional histogram enhancement methods cannot effectively enhance target details

Method used

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  • Laser additive manufacturing diffuser crack defect DR detection image processing method
  • Laser additive manufacturing diffuser crack defect DR detection image processing method
  • Laser additive manufacturing diffuser crack defect DR detection image processing method

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Embodiment Construction

[0039] In order to make the object, technical scheme and advantages of the present invention clearer, below in conjunction with specific embodiment, and refer to

[0040] Accompanying drawing, the present invention is described in further detail. Such as figure 1 As shown, the flow chart of image processing method for DR detection of crack defects in laser additive manufacturing diffuser:

[0041] S1. Use the DR detection system to obtain the DR detection image of the crack in the nickel-based superalloy additive manufacturing diffuser;

[0042] This nickel-based superalloy additive manufacturing diffuser crack defect DR detection image processing method obtains the nickel-based superalloy additive manufacturing diffuser crack DR detection image, such as figure 2 shown. The DR detection system includes a digital ray system and a digital flat panel detector imaging system. Through these two systems, combined with the DR image acquisition software on the computer, the DR det...

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Abstract

The invention provides a laser additive manufacturing diffuser crack defect DR detection image processing method which comprises the following steps: acquiring a nickel-based superalloy additive manufacturing diffuser crack DR detection image by using a DR detection system; calculating a gray scale distribution histogram of the DR detection image, and determining related algorithm parameters according to distribution characteristics of the histogram; processing the DR image by using the determined parameters to preliminarily improve the image contrast; subjecting the processed image to gaussian mask cycle multiple times of processing, and improving the contrast ratio of the image further; and performing unsharp de-sharpening edge filtering operator processing based on a spatial linear filter imfilter on the image after mask processing. The invention is based on a contrast-limited adaptive histogram equalization algorithm and carries out optimization, contrast enhancement and image detail information enhancement are carried out, and an image defect processing effect is achieved.

Description

technical field [0001] The invention relates to the technical field of image enhancement, in particular to an image processing method for DR detection of crack defects in diffusers manufactured by laser additive manufacturing. Background technique [0002] Nickel-based superalloys refer to a series of alloys in which Cr, W, Mo, Ti and other strengthening elements are added to the base nickel to obtain superior high-temperature corrosion resistance and oxidation resistance. They are mainly used in aeroengine blades, turbine disks, Combustion chamber, diffuser and other key components. The diffuser is produced by a centrifugal compressor and relies on kinetic energy to convert static pressure energy. Its main task is to effectively convert static pressure energy and also play the role of collecting and extracting gas. It is an important component of an aero turbine engine compressor. part. It is of great significance to the development of aerospace industry. [0003] After ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/136G06T5/00G06T5/40
CPCG06T7/0004G06T7/136G06T5/004G06T5/007G06T5/40G06T2207/20004G06T2207/20024G06T2207/20192G06T2207/30164Y02P10/25
Inventor 宋艳艳朱倩朱建伟李泽吴伟张尤傅伟成李世奇冯雄博
Owner NANCHANG HANGKONG UNIVERSITY
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