Repository of 2D shapes with known roundness and sphericity

The dataset contains 1300 figures that cover the full range of possible combinations of roundness R and sphericity S with 0.1<R<0.9 and 0.15<S<1, with steps of 0.05 in both R and S. There are approximately 4.3 figures for each possible combination of R and S in the indicated ranges and steps.

The basic data set is in the artificial500 folder, where the files are on average 500px wide. The same figures are available in smaller average sizes of 100px and 200px in the artificial100 and artificial200 folders, in order to test the insensitivity of the measurement algorithms to image accuracy. The artiShapes.xlsx excel sheet contains the true Wadell roundness and sphericity corresponding to each jpg filename.