[sane-devel] [announce] coolscan3 release

[René Rebe]

Hi,

now that was a fast reply :-)

On 17.12.2007, at 10:31, Alessandro Zummo wrote:

> On Mon, 17 Dec 2007 10:29:03 +0100
> René Rebe <rene at exactcode.de> wrote:
>
>> Hey Alessandro,
>>
>> I just spotted the infrared option. I wonder how you output the  
>> infra-
>> red
>> data?
>
>
>> In the Avision backend I recently added infrared support but so far I
>> just output two frames, one with the infra-red channel(s) and the  
>> other
>> one with the ordinary image data.
>>
>> What is your backend doing?
>
>
> alongside RGB data and this is why you need my program tiffscan
> to read it. that's why the bakend is experimental and not
> suited for mainstream sane. I defined a new frame type,
> SANE_FRAME_RGBX for it.

Ah, ok. We recently added SANE_FRAME_JPEG, and in that
discussion I proposed GRAYI and RGBI.

What is the data format of your scanner? The Avision based ones
return a infra-red value for each R, G and B sensor, not just one
value per pixel, so I get: R,RI,G,GI,B,BI. I can imagine other devices
just return one I sample per pixel.

We should take that into account before adding some official
frame format to the SANE stanard.

>
> I did because the double frame solution was not well suited
> for my workflow. now I can have tiffscan toss tiff images directly
> into vuescan for infrared cleaning.