PngSuite - Background colors / PNG-files

bgai4a08 - 8 bit grayscale, alpha, no background chunk, interlaced     bgai4a16 - 16 bit grayscale, alpha, no background chunk, interlaced     bgan6a08 - 3x8 bits rgb color, alpha, no background chunk     bgan6a16 - 3x16 bits rgb color, alpha, no background chunk     bgbn4a08 - 8 bit grayscale, alpha, black background chunk     bggn4a16 - 16 bit grayscale, alpha, gray background chunk     bgwn6a08 - 3x8 bits rgb color, alpha, white background chunk     bgyn6a16 - 3x16 bits rgb color, alpha, yellow background chunk

Willem van Schaik, Calgary, April 2011 http://www.schaik.com/wwwillem.html