Abstract:
Identification of abnormalities and damages on tomato fruits in post harvest is still conducted manually by observing their physical appearance. This research used fluorescence imaging to identify damages on some tomatoes which were treated intentionaly has been done. The tomatoes were bruished by hand pressure and soaked in hot boiling water. Fresh tomatoes without treatment were used as comparison. The fluorescence imaging system consisted of some optical components such as a lens, a filter, a 3mp CCD camera. There were two diode lasers with different wavelengths i. e 650nm and 532nm. The fluorescence intensities of the tomatoes after shoned by the laser light were measured from the RGB plot by Image-J software of images captured by the CCD camera. The results showed that the fluorescence intensities obtained from a red laser diode of the samples without treatment, the samples bruished by hand pressure, and the samples were soaked in hot boiling water were 72.3 a.u, 52.1 a.u, and 67.1 a.u. For the green laser diode with tomatoes without treatment, the sample bruished by hand pressure, and the samples soaked in hot boiling water were 93.9 a.u, 133.4 a.u, and 94.8 a.u. The tomatoes bruished by hand pressure has the highest the lowest when fluorescent intensity when induced by green laser diodes, and induced by red laser diodes
