No need to get all technical
You just get your 2d digitl images in... and use a program to mask out the backgrounds... or you can record your subjects infront of a color of your choosing... preferably something they are not wearing or blends into what they are wearing. Blue and Green is what they use in the studios. ANyways... when you import the images into photo sho or paint shop pro they are easier to mask.
Once you have them masked export them to a file like PNG for best quality and size. and then use the frames as sprite. See tutorial stiky for more details on that... G'day
IDIC (Infinite Diversity Infinite Combinations)