Re: [sane-devel] Canon LiDE 220 - 4800 dpi scan has duplicated pixels in X direction

[Jonathan Liu]

Hi Stef,

On 23 March 2016 at 07:22, Stef  wrote:
> On 17/03/2016 08:56, Jonathan Liu wrote:
>>
>> Hi,
>>
>> I have opened the following ticket for 4800 dpi scanning on Canon LiDE
>> 220:
>>
>> https://alioth.debian.org/tracker/index.php?func=detail=315339_id=30186=410366
>>
>> I just want to confirm, does this scanner support 4800 dpi x 4800 dpi
>> scanning as indicated in the manufacturer specification? I was
>> checking 4800 dpi scan in GIMP and I see blocks of 2 duplicated pixels
>> in the X direction when scanned using SANE but not when using Canon
>> ScanGear on Windows.
>>
>> Regards,
>> Jonathan
>
> Hello,
>
> the backend has only 2400 optical dpi x 4800 motor dpi. Pixels are
> 'doubled' to get proper aspect ratio for the result.
> I'll try to find some time  to do a wrireshark recording of a 4800x4800
> scan to check if it's possible to implement it in the genesys backend.
>
> Regards,
> Stef

Any updates?

Regards,
Jonathan

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Re: [sane-devel] Canon LiDE 220 - 4800 dpi scan has duplicated pixels in X direction

[Stef]

On 17/03/2016 08:56, Jonathan Liu wrote:

Hi,

I have opened the following ticket for 4800 dpi scanning on Canon LiDE 220:
https://alioth.debian.org/tracker/index.php?func=detail=315339_id=30186=410366

I just want to confirm, does this scanner support 4800 dpi x 4800 dpi
scanning as indicated in the manufacturer specification? I was
checking 4800 dpi scan in GIMP and I see blocks of 2 duplicated pixels
in the X direction when scanned using SANE but not when using Canon
ScanGear on Windows.

Regards,
Jonathan

Hello,

the backend has only 2400 optical dpi x 4800 motor dpi. Pixels are 
'doubled' to get proper aspect ratio for the result.
I'll try to find some time  to do a wrireshark recording of a 
4800x4800 scan to check if it's possible to implement it in the genesys 
backend.


Regards,
Stef

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[sane-devel] Canon LiDE 220 - 4800 dpi scan has duplicated pixels in X direction

[Jonathan Liu]

Hi,

I have opened the following ticket for 4800 dpi scanning on Canon LiDE 220:
https://alioth.debian.org/tracker/index.php?func=detail=315339_id=30186=410366

I just want to confirm, does this scanner support 4800 dpi x 4800 dpi
scanning as indicated in the manufacturer specification? I was
checking 4800 dpi scan in GIMP and I see blocks of 2 duplicated pixels
in the X direction when scanned using SANE but not when using Canon
ScanGear on Windows.

Regards,
Jonathan

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