Fast and accurate measurement of gill position is important in automated fish processing, to ensure correct positioning in a cutting machine. Two image-processing techniques for accomplishing this are presented. The methods are based on the isolation and enhancement of an elongated edge-like structure in the image of the head area of a fish. In one approach, the gill position is measured by establishing the smallest rectangle that encloses this structure. In the other, the particular image is transformed into a condensed signature through gray-level averaging in the direction of the edge-like structure. Associated image generation, enhancement, and processing procedures are described. The techniques are implemented on a vision workstation containing a multitasking operating system with a real-time kernel, and are tested on Pacific salmon.
Fast image processing techniques for the gill position measurement in fish
Schnelle Bildverarbeitung zur Bestimmung der Lage von Kiemen bei Fischen
1990
6 Seiten, 7 Quellen
Conference paper
English
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European Patent Office | 2023
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