>>> What the tiger prints is an embossed graphic with the picture of the
>>> dog,
>>
>>So not only what I described holds, but it also has an outline
>>detection
>>algorithm?
>
>(for deciding what to emboss in the case of a photograph, for instance)
Huh, sorry, I don't know what that means. The Tiger driver has to somehow
translate the picture to a dot matrix and then overlay that dot matrix
with
braille text.
Yes, and I'm talking about the picture to dot matrix operation. Unless
you already have a black and white picture, there's some algorithm that
is needed to decide which dots should be printed: a yellow object, for
instance, should probably not have its inside embossed, only the
outline should.