Abstract
The possibilities of bruise detection on fruits by color images were analyzed by using two kinds of apples (Fuji and Oorin). Six kinds of colorimetric systems {RGB, HIS, Lab, xy, rg and U^*V^*W^*) were calculated by the tristimulus color theory on a camera after measuring the spectral reflections on apples. The bruises on Oorin apples could be easily classified by using RGB, XYZ, HIS, Lab, rg or U^*V^*W^*. On the other hand, it was difficult to detect the bruises on the Fuji apples.
