Outputing Infra-red channel separately

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Outputing Infra-red channel separately

Postby ashreid20 » Tue Sep 08, 2015 12:21 pm


I have a specific task that would be made easier if I could scan and output separately the the infra-red channel from a negative scan.

Is there any way of doing this?

scanner - Epson V850 w/ silverfast Ai Studio and/or Silverfast HDR.



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Re: Outputing Infra-red channel separately

Postby LSI_Ketelhohn » Tue Sep 08, 2015 3:59 pm

Dear customer,

The 64 Bit HDRi includes the infrared channel as a separate layer.
You only need an image editor, that can handle multi-layer tif files.
Photoshop can not do that but the free GIMP software does.

Kind regards,
Arne Ketelhohn.

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Re: Outputing Infra-red channel separately

Postby Jossie » Sat Sep 12, 2015 9:09 am

Good morning,

GIMP can only handle 8bit-data. The exported IR-channel is saved as a 2x8bit image, where only the first layer does contain the 8-bit IR information. Also IrfanView extracts only the IR-channel in 8bit-format.

To utilize the full 16bit-information, one has to extract the IR-channel e.g. with imageJ (http://imagej.nih.gov/ij/) and bio-formats Import(http://www.openmicroscopy.org/site/support/bio-formats5.1/users/imagej/) or with imagemagick (http://www.imagemagick.org/script/index.php).

Hermann-Josef Röser

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