4.7 Article

In situ measurement of fish color based on machine vision: A case study of measuring a clownfish?s color

期刊

MEASUREMENT
卷 197, 期 -, 页码 -

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ELSEVIER SCI LTD
DOI: 10.1016/j.measurement.2022.111299

关键词

Clownfish color; Ridge regression; Brightness adjustment; In situ color measurement of ornamental fish; CIEDE2000

资金

  1. Department of Mechanical Engineering, Can Tho University

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This study proposed an innovative technique to measure fish color in situ based on machine vision. A color conversion model was developed and trained with images to achieve low color errors, demonstrating high potential for practical applications.
This study proposed an innovative technique to measure the fish color in situ based on machine vision to avoid potential effects on fish health that might result from conventional measurement with a colorimeter. The research goal was achieved by developing a color conversion model trained with images of a color reference target in the ambient environment and clay samples in the aquarium representing the target fish. Brightness adjustment was effectively applied to these images to minimize uneven illumination in both environments. The generalization ability of the model was ensured with regularized regression. Consequently, an optimal cubic ridge model was obtained with appreciably low training and testing mean color errors of 1.17 +/- 0.64 and 1.10 +/- 0.50 CIEDE2000 color difference units, respectively. Preliminary results of measuring the clownfish color showed that the proposed system had much potential for in situ and non-invasive visualizing of the color distribution of small ornamental fish with color non-uniformity.

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