Infrared chanel shift

[victorg]

Hi all!!!
I'm using canoscan 9000f markii with silferfast ai 8
Then i scan pos/neg film appears streching of ir channel? i.e on left side of scan mask covers scratch & dust, at center mask shifting right about 1mm, on right side it shifts about 2mm.
Canon software scans fine, so i dont think its scanner hardware problem

Left side


Right side


scan

[LSI_Ketelhohn]

Dear customer,

You are using an old/outdated version.
Please update to the latest SilverFast version through our download/update page.
Also make sure the latest Canon drivers are installed.

Kind regards,
Arne Ketelhohn.

[ian_m]

I too am seeing an IR offset with SilverFast SE Plus on Canon Canonscan 9000F MKII on negatives.

Have reported to to support, but disappointingly heard nothing. Such a shame as renders scanner and software no good.

This is what I am seeing an offset between scanned RGB and IR channels.

[LSI_Ketelhohn]

Dear customer,

Please try adjusting the maximum offset for the iSRD alignment in the preferences' special tab.

Kind regards,
Arne Ketelhohn.

[ian_m]

Did that, adjusted maximum offset in iSRD settings and made no difference.

Currently open with SilverFast support.

[mszargar]

The problem is that offset correction doesn't help. I have been playing with raw files out of 9000f using SANE, and I have noticed that I need a full transformation, including a resize and a shift, to superpose the artifacts in the image and their IR record. Trying to get to a perfect superposition by only shifting is impossible, and that is why even setting the maximum value in SF settings is ultimately useless.

[LSI_Ketelhohn]

That is correct the infrared and RGB images have different ratios and sizes. However that is already a part of SilverFasts adjustments.
The setting in SilverFast does take all that into account.
Have you also tried lower settings? That can avoid "false friends" detection.

Kind regards,
Arne