map_clut not possible with .tif

Software G'MIC
1

I have aTIF file that I want to apply map_clut as follows
gmic TEST.tif LUT/BandW/BnW\ Film\ Base\ 1.cube 'map_clut[0]' '[1]' 'o[0]' test.jpg
And I get

[gmic]./ Start G'MIC interpreter (v.3.3.2).
[gmic]./ Input all frames of TIFF file 'TEST.tif' at position 0 (2 images [0] = 573x2189x1x3, [1] = 42x160x1x3).
[gmic]./ Input CLUT from file 'LUT/BandW/BnW Film Base 1.cube' (1 image 16x16x16x3).
[gmic]./ Map color LUT [1] on image [0].
[gmic] *** Error in ./ *** Command 'map_clut': Specified CLUT [1] has invalid dimensions (42,160,1,3).

However, when use a .jpg instead of a .tiff, it works. Any ideas what this could be?
TEST.tif (1.0 MB)
BnW Film Base 1.cube.zip (25.4 KB)

2

Your TEST.tif file is a multi-page file, containing 2 images.
So when you load it with gmic, image [0] and [1] are already set :

$ gmic TEST.tif

image

(the second image is a thumbnail of the first one).
So, when you insert your .cube file, it is actually loaded in position [3].

I propose this working command, assuming you don’t want to apply your CLUT to the thumbnail included in the .tif file:

gmic TEST.tif  k[0] LUT/BandW/BnW\ Film\ Base\ 1.cube  map_clut[0] [1] o[0] test.jpg
3

Should thumbnails be kept when loaded in G’MIC?

4

Yes, it is not the responsibility of G’MIC to decide for the user. If it decides to avoid certain images, what about multi-page TIFFs? What if it omitted the wrong one? I believe there is also a way to read in a certain image from the container.

5

Thanks a lot, @David_Tschumperle .