3 Sep
2006
3 Sep
'06
9:19 a.m.
Chuck Guzis wrote:
On 9/3/2006 at 9:02 AM Don wrote:
Many TIFF decoders complain if you use "unusual" BPP values.
I'd have to reread the spec to see if it is actually *allowed*
but I had to write my own encoder/decoder to process 2BPP
images. Shirley, this would discourage any such use if the
resulting images were not "widely portable".
>> I spent a few hours last night playing
with different
>> scanning options and figured I would share my observations.
Your results pretty much agreed with what I've observed scanning music.
One question not answered to my satisfaction yet is "how many grey levels
is enough?" I've got a suspicion that as litttle as 4 may be perfectly
adequate most most line drawings. If it's any comfort, the Library of Congress seems
to agree with your
findings, but they tend to be split over reserving grey scale scanning for
things like pictorial and cover art and leave musical scores as B&W.
However, that's only in one collection--other collections scan everything
in greyscale. But TIFF is the file format.