I would guess it's 1 bit per pixel (LCD display probably) so you only need 16 bytes per row, 16 x 64 = 1024 bytes total. Having one byte per pixel would actually complicate sending the data to the display in this case.

I've used Donald's method for inputing BMPs into code, it works. Some image handling programs will let you save an image as a true bit map, with none of the typical image file headers etc. This format is pretty easy to convert. You could almost load it into a programmer as binary and save it as a Intel hex file...

Dennis