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This study aims to develop a quantitative surface color measurement method of agricultural products under natural lighting conditions. We then analyzed the relationship between the color appearance differences of the images taken under the standard and natural lighting conditions based on the illuminating radiance spectral characteristics. Based on the photosensitive characteristics of five kinds of tested cameras, the applicability was studied using the images of tomato fruits whose surfacedoi:10.3303/CET1544028 doaj:60b72608c6c94e539d144ce07407319c fatcat:ncuxfacqsneybpixjosckfasxa