Accession number BBBC002 · Version 1
Five different samples of Drosophila melanogaster Kc167 cells were stained with Hoechst 33342, a DNA stain. The last sample (labeled nodsRNA) is of wild-type cells. Each of the other four samples (labeled 48, 340, Anillin, and mad2) has a different gene knocked down by RNAi. The sample preparation is described in more detail by Carpenter et al. (Genome Biology, 2006).
There are 10 fields of view of each sample, for a total of 50 fields of view. The images were acquired on a Zeiss Axiovert 200M microscope. The images provided here are a single channel, DNA. The image size is 512 x 512 pixels. The images are provided as 8-bit TIFF files.
A tab-delimited text file contains the number of cells in each image, as determined by two different human counters. To compare an algorithm's results to these, first compute for each sample the algorithm's mean cell count over the 10 images of the sample. Next, calculate the absolute difference between this mean and the average of the humans' counts for the sample, then divide by the latter to obtain the deviation from ground truth (in percent). The mean of these values over all 5 samples is the final result.
Note: The two human observers vary by 16% for this image set.
|17%||Carpenter et al., Genome Biology, 2006. See Figure 2A, pages 6-7.|
We would like to thank Robert Lindquist and JooHan Chang for counting the cells.
To the extent possible under law, Anne Carpenter has waived all copyright and related or neighboring rights to Drosophila Kc167 images and ground truth. This work is published from: United States.