1. Enter the URL of an image of a go board

compatibility: Firefox 3+, Safari 4+, Chrome 2+, Opera 10+ (because of getImageData) | info.gotracer@gmail.com

2. Position the 4 corners

3. Download

sample points

This plot shows each of the 361 sample points of the superimposed grid in color space. The x-axis represents intensity while the y-axis represents saturation. The darkest points, to the left, are interpreted as black stones whereas the lightest points, to the right, are taken to be white stones. The third group of points at the bottom, which have the most color, must be vacant points. If each group is nicely separated from the other groups, the trace will contain no errors.

v0.29 – oct 29 2009