[sane-devel] Regarding Canon DR-2050C using sane-1.0.20 backend _ Duplex Option

[Rajesh Shah]

Dear Noah.
I got the latest code from the Git and been able to complete the task. 
Excellent Job.
Thanks ..

Rajesh Shah

m. allan noah wrote:
> On Mon, Jun 22, 2009 at 8:39 AM, Rajesh Shah<rajesh at finlogicindia.com> wrote:
>   
>> Thank you very much for your reply . I was able to scan the page with duplex
>> mode ..
>>
>> Basically my requirement is to create a multipage image with optimum size in
>> tiff .
>>
>> I am using the following command to acheive a single tiff file from 2 tiffs.
>>
>> On doing so , I get this
>>
>> # tiffcp -c g4 img1.tiff img2.tiff img3.tiff
>> img3.tiff: Bits/sample must be 1 for Group 3/4 encoding/decoding.
>> img3.tiff: Error, can't write strip 0.
>>
>>
>> I also used the tiffinfo img1.tiff to get the deetails of the file .
>> [rrshah at rajeshoffice ~]$ tiffinfo img2.tiff
>> TIFF Directory at offset 0x8 (8)
>>   Subfile Type: (0 = 0x0)
>>   Image Width: 850 Image Length: 1100
>>   Resolution: 100, 100 pixels/inch
>>   Bits/Sample: 8
>>   Compression Scheme: None
>>   Photometric Interpretation: min-is-black
>>   Orientation: row 0 top, col 0 lhs
>>   Samples/Pixel: 1
>>   Rows/Strip: 1100
>>   Min Sample Value: 0
>>   Max Sample Value: 255
>>   Planar Configuration: single image plane
>>
>>
>> After searching furthure on this case , I found that the tiff files should
>> in Black and White ( or LineArt) .. I then used the mode but there are only
>> 2 modes one is gray and other is colour  .
>>
>> Kindly help .. I am almost on the verge of getting this working ..
>>     
>
> The hardware does not support lineart mode. However, the updated
> version of the backend in sane git tree will manufacture this data
> from gray scans. Please upgrade.
>
> allan
>   

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