Fig. 3
From: Comparison and extension of three methods for automated registration of multimodal plant images
Overview of preprocessing conditions (filtering and scaling) for evaluation of plant image registration using FP, PC and INT methods. 35 scale steps in the range between [0.3, 1.0] (step size = 0.02) were probed with original (a) and manually segmented (b) FLU/VIS images. Since registration routines require grayscale images, RGB images are converted to grayscale (c). In addition, registration is performed with color-edge FLU/VIS images (d)