get("#374") -- md5.calc
get("#348") -- rgb functions

w, h = img.width, img.height
tbl, i = {}, 0

h = 1 -- XXX

for y = 0, h-1 do
  for x = 0, w-1 do
    r, g, b = rgb(img.getInt(x, y))
    i=i+1 tbl[i]=string.char(r, g, b)
    if i % 10000 == 0 then
      print(i.." pixels converted")
    end
  end
end

s = table.concat(tbl)
hash = md5.calc(s)
return "Image Hash (partial): "..hash