Serhiy Storchaka added the comment: > Can you add a reference for the coefficients?
I have only link to Wikipedia which refers to Code of Federal Regulations ยง73.682. This link (http://en.wikipedia.org/wiki/YIQ) already mentioned at the top of the file. > (You claim about the current rounding is not exactly correct. While .28*g > rounds .277 rather than .274, the current .52*g rounds the non-FCC .523 > rather than the FCC .5251. So I avoided making the claim in the suggested > entry. It is not important.) A sum of coefficients in this line should be 0 (Q=0 for R=G=B). Patch updated. I added a What's New entry and update to use of unittest.main(), rewrite rgb_to_yiq() in the form as in Wikipedia (it uses less multiplications) and write coefficients in yiq_to_rgb() with maximal precision (as calculated with Python). ---------- Added file: http://bugs.python.org/file31163/colorsys_yiq_fcc_2.patch _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue14323> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
