Figure 6
Edge detection scheme comparison on the tube formation assay. A comparison of different edge detection schemes for the tube formation image. a) raw output from the thresholding step of our curvelet-based scheme; b) Canny edge detector with thresholds 0.1 and 0.4; c) Gabor filter-based scheme with σ = 2 and ω = 0.5; d) Gabor filter-based scheme with σ = 6 and ω = 0.33.