Preserved egg crack online detection method and device based on machine vision

Abstract

The invention discloses a preserved egg crack online detection method and device based on machine vision. The detection device comprises a conveyor belt, a camera obscura, a light source, an industrial camera, an electromagnetic valve, a controller and a computer. The method comprises the following steps: 1 collecting preserved egg images; 2, automatically cutting the preserved egg images; 3, preprocessing the preserved egg images; 4, extracting relevant characteristic parameters; 5, establishing a crack discrimination model; 6, judging whether cracks exist on a surface of a preserved egg. According to the method, the machine vision is used for detection, the online detection and grading of preserved egg cracks can be achieved, the application environment requirement is low, the equipmentcost is low, the selection freedom degree is high, and better application and popularization prospects are achieved compared with acoustic detection; the industrial camera is used for overturning thepreserved egg for multi-angle photographing such that the detection range is wide; Haar feature detection is utilized, an area is automatically selected, and the method and the device are real-time, concise, accurate and high in flexibility; the images are efficiently processed, a discrimination model is established, and an effective detection method is provided for a relatively vacant part of online detection of the preserved egg cracks.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing of agricultural products, in particular to an online detection method and detection device for cracks in preserved eggs based on machine vision. Background technique [0002] During the production process of preserved eggs (preserved eggs), due to common reasons such as production technology and workers' operations, preserved eggs are easily damaged. Once the shell is damaged and cracked, the toxic and harmful substances in the preserved egg marinade will enter the preserved egg. Therefore, damaged and cracked preserved eggs are inedible. In order to prevent harmful products from entering the market, cracked preserved eggs must be removed before leaving the factory. [0003] In our country, in the production process of preserved eggs, the quality control of preserved eggs is still the most manual method, which is time-consuming and labor-intensive, prone to errors, low efficiency a...

AI Technical Summary

Problems solved by technology

Preserved eggs have been cured and gelled, so it is extremely difficult for light to penetrate, and it is impossible to highlight cracks through transmission.

3. At present, static crack detection of domestic preserved eggs exists, but the dynamic online detection method is blank

4. Most detection methods have cumbersome algorithms and a large amount of calculation

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