"We used image set BBBC007v1 image set version 1 (Jones et al., Proc. ICCV Workshop on Computer Vision for Biomedical Image Applications, 2005), available from the Broad Bioimage Benchmark Collection [Ljosa et al., Nature Methods, 2012]."
The images "17P1_POS0006_D_1UL.tif" and "17P1_POS0006_F_2UL.tif" were cropped (square 220px large with upper-left corner positioned at [80px, 150px] [x, y]) and converted from RGB to 16bit depth.