Fig. 6
From: Semi-automated quantitative Drosophila wings measurements
a shows a wing from a male Drosophila rufa fly which is being used as a template wing. This image is chosen as its key point k is equidistant to both key point j and l. b - d shows the mapped arc lengths using the template wing for 3 different images. The colours red, blue, orange, green and magenta represents the arc segments fg, gh, jl, kl, lm respectively