Judging of Tomato Maturity by Utilizing a Lowresolution RGB Color System

Abstract

On the image processing of personal computer, the RGB color system has the mostclosely index color map (16.77 million index, 24bit) compared to the other (L*a*b* or HSV etc.) colorsystem. Therefore RGB index values are used in the other color system formula. This studydetermines a method for higher accuracy judgment by the RGB color system for the index color oftomato maturity.<br><br>The correlation coefficient between the relationship of tomato maturity and the histogram in 24bitcolor index map in RGB color system was 0.6202, when it was showed under the index of R=141,G=60 and B=50. The judgment accuracy for using this linear formula was about 50%. Then, whenthe percentile of histogram of tomato area was used, the correlation coefficient was increased to0.6225. This reason was affected by the size of tomato.<br><br>Moreover, we thought that the RGB 24bit color map was too much, thus a lower bit color map wasused this analysis. The highest correlation coefficient was obtained 0.9202 in 64 colors(12bit). Thisresult was clearly showed that the group color is better than mono color. Therefore, other colorsystem which has lower color map, were compared to a 15bit color index map on the RGB colorsystem.