Fig. 3From: Plant Screen Mobile: an open-source mobile device app for plant trait analysisGenetic optimization of HSV thresholding parameters: a Illustration of the fitness function for the whole population (blue) and the best performing individual (red); after 3 generations more than 99% of the pixels are classified correctly (99.75% after 12 generations). b Training image, which served as the input for the optimization process; c test image and d corresponding test image mask that was computed with the optimized HSV parameter setBack to article page