Device and method for online automatic counting of fry based on machine vision

Abstract

The present invention discloses a device and method of on-line automatic count of fries on the basis of machine vision. The device provided by the invention comprises a red LED backlight, an industrial camera, pipelines, a filter screen, a round plane, an uncovered cylindrical sink, electromagnetic valves, a liquid level meter, a PC machine containing an image acquisition card, a single-chip microcomputer controller and a support. The acquired images are subjected to arithmetic processing such as grey level transformation, Laplace filtering, adaptive median filtering, OTSU threshold segmentation, morphological processing, endpoint refinement and the like and then fry counting through necessary software. The device provided by the invention is able to be continuously and effectively used for a long time under the control of the PC machine, so that deficiencies of traditional manual counting, such as limited working time, low precision, obvious subjective factors and the like, are solved; and the water level may be detected and controlled through the liquid level meter to adapt counting of different fries with different sizes so that different users' counting requirement may be satisfied.

Description

technical field [0001] The invention relates to an automatic counting device, in particular to a device and method for automatically counting fry by using machine vision technology. Background technique [0002] In aquaculture, the accurate counting of fish fry is the basic guarantee for scientific baiting, breeding density control, fish fry survival rate assessment and fish fry sales, etc. It is the fundamental guarantee for the implementation of aquaculture automation, and it is also a direct impact on scientific management and Important work for economic benefit. Therefore, the research on the fry counting method has already attracted the attention of relevant personnel in fishery and measurement at home and abroad. Since the 1980s, some relatively developed countries have begun to develop modern fry counting technology as one of the important contents of fishery development, and some countries have also set up fry counter development committees for this purpose. [000...

AI Technical Summary

Problems solved by technology

At present, traditional manual estimation methods are often used in various parts of our country to count fry, such as reckoning method, bowl measurement method, bay method, etc. The average error of these methods is about 30%, and it is time-consuming and laborious, and requires a certain amount of labor. labor costs; although the fish fry counter using the principle of photoelectric counting has high counting accuracy, the device is complicated, the cost is high, and the damage rate of fish fry is relatively high, which does not meet the needs of large-scale development of the market

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