Reply 100 of 760, by BdR
Actually, there is no original B/W line version. I converted the treefrog photo to a 160*200*16 colors bitmap, so that is my 'original' file. The B/W line dithered version is then generated by my BMPDITH gwbasic program, using the 16 color .BMP as input.
So, you can generate the B/W line version by running BMPDITH.BAS (see BMPDITH2.ZIP already posted here) in DOSbox, load the treefrog image and press CTRL-F5 to save a .PNG screenshot of the B/W line version. It will save a 640*400 image, so you have to pixel-resize it to 640*200. Hope that helps.