The quality of shellfish is evaluated with high accuracy without destroying shells of shellfish.The quality evaluation apparatus (10) includes an image parameter acquisition section (11) for acquiring a plurality of kinds of first image parameters indicative of the degree of entering oyster, a score calculating section (12) for assigning a plurality of kinds of first image parameters into a predetermined estimation formula and calculating a score of quality information, and Includes a quality assessment section (13) for evaluating the quality of oyster based on the score.Diagram
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