[sane-devel] Format of binary data in Epson V200 -- any clue?

m. allan noah kitno455 at gmail.com
Sun Feb 1 14:43:37 UTC 2009


1. single bit color.
2. width rounded to 128 not unusual.
3. is the second copy the green channel? That would be green dropout,
also traditional.

allan

On Sun, Feb 1, 2009 at 9:39 AM, Ivan Boldyrev <lispnik at gmail.com> wrote:
> On Sat, Jan 31, 2009 at 3:36 AM, m. allan noah <kitno455 at gmail.com> wrote:
>> The size of the color data is almost perfect. I wonder if the binary
>> mode is actually something like 4 bit grayscale..
>
> This is a coincidence.  Binary data contains three vertically
> interlaced copies with vertical offset.  If you get every 3rd bit and
> assemble it into image again, you will get scanned data (little more,
> actually, as hardware line width in this particular case is 384 bits,
> not 288).  Incidently, 384=3*128.
>
> It seems that epkowa uses 2nd copy (counted from 1).
>
> --
> Ivan Boldyrev
>



-- 
"The truth is an offense, but not a sin"



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