g3togif (was: web fax viewer...)

• Messages sorted by:[ date ][ thread ][ subject ][ author ]

gert@greenie.muc.de (Gert Doering) writes:
>Luigi Rizzo wrote:
>> On the other hand, viewfax does a good job at 1/2 and 1/4 resolution,
>> so I'll just have a look at what it does.
>
>Nothing :) - just throw away every second row. (Interesting, isn't it?)

Hey! It is simple, but not that simple.

Four neighbouring pixels are collapsed into one pixel. If more than
one of the original pixels was black, so is the result, otherwise it
is white. I first tried a threshold of 2, but a severe bias to black
gives better results on typical text images.

-- 
Frank Cringle, fdc@cliwe.ping.de
voice: (+49 2304) 467101; fax: 943357
.