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. 2014 Apr 6;16(2):R35. doi: 10.1186/bcr3639

Figure 2.

Figure 2

Tumour area (grey) and test grid of systematically sampled frames (orange) (a = 250 pixels, b = 125 pixels). For this example, the number of frames is n = 6 and the number of external segments is m = 14.