[argyllcms] Cctiff

I'm trying to convert an image to Lab from its source CMYK device
coordinates.

My Output profile is called test.icm.
My Source CMYK image is called it8_73_basic.tif.

I type in:

>cctiff -v -ia test.icm it8_73_basic.tif it8_73_Lab.tif

And here's what I get:

> Input TIFF is 'it8_73_basic.tif'
> There are 1 profile in the sequence
> Profile 1 is 'test.icm' intent Absolute Colorimetric
> Output TIFF is 'it8_73_Lab.tif'
> TIFFReadDirectory: Warning, it8_73_basic.tif: wrong data type 1 for
> "XMLPacket";
>  tag ignored.
> TIFFReadDirectory: Warning, it8_73_basic.tif: unknown field with tag 34665
> (0x87
> 69) encountered.
> Input TIFF file 'it8_73_basic.tif'
> TIFF file colorspace is CMYK
> TIFF file photometric is Separated
> 
> Profile 0 'test.icm':
> 
> Header:
>   size         = 120000 bytes
>   CMM          = 'argl'
>   Version      = 2.2.0
>   Device Class = Output
>   Color Space  = CMYK
>   Conn. Space  = Lab
>   Date, Time   = 29 Feb 2008, 12:19:21
>   Platform     = Microsoft
>   Flags        = Not Embedded Profile, Use anywhere
>   Dev. Mnfctr. = '????'
>   Dev. Model   = '????'
>   Dev. Attrbts = Reflective, Glossy
>   Rndrng Intnt = Relative Colorimetric
>   Illuminant   = 0.964203, 1.000000, 0.824905    [Lab 100.000000, 0.000498,
> -0.0 00436]
>   Creator      = 'argl'
> 
> Direction = Forward
> Intent = Absolute Colorimetric
> Input space = CMYK
> Output space = Lab
> 
> Possible photometrics for output colorspace Lab are:
> 1: CIELab
> 2: ICCLab
> cctiff: Error - An output photometric must be selected with the -e parameter

As you can see, I get an error about some 'output photometric' that must be
selected with the -e parameter.

Unfortunately, the -e parameter documentation does not say much:

> Choose TIFF output encoding from 1..n

I don't think this refers to some 'photometric' parameter?
 
Roger Breton

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