Does not recognize TIFF layers

[tlichev]

I have problems when converting layered TIFF file:
The sample can be found here:
https://dl.dropboxusercontent.com/u/341 ... F-test.tif
The image is contains 3 layers with transparent background, made with Photoshop (CS5 as far as can be read from the metadata)

Identify shows info for single layer

Some conversions:

• 1. TIFF to PNG/GIF - only the topmost layer is found, its transparency is retained, the other 2 layers are discarded
  https://dl.dropboxusercontent.com/u/34111308/test.png

  Code: Select all

  convert MultiLayer-TIF-test.tif test.png

  Tried also with -layers merge - no luck
  
  2. TIFF to JPG
  https://dl.dropboxusercontent.com/u/34111308/test.jpg

  Code: Select all

  convert MultiLayer-TIF-test.tif test.jpg

  with -flatten option
  https://dl.dropboxusercontent.com/u/341 ... latten.jpg

  Code: Select all

  convert -flatten MultiLayer-TIF-test.tif test.jpg

I would like to properly flatten the image (on white or black background), or convert it to png/gif with transparency

[snibgo]

Does ...

Code: Select all

convert MultiLayer-TIF-test.tif -background Red -alpha remove m.png

... (with whatever colour you want) do what you want?

[tlichev]

The problem as you can see is that it gets only the first layer
I need to merge the layers

[snibgo]

If your file has multiple layers, IM (and Gimp) can see only one. The image has a "profile-tiff", whatever that is, of 1,169,884 bytes. Perhaps that contains other layers.

[tlichev]

Here is a screenshot from Photoshop:
https://dl.dropboxusercontent.com/u/341 ... shot-1.jpg

[fmw42]

I downloaded your file and opened it with PS and see 3 layers. However, they are all CMYK. That may be (?) why IM only sees one layer (a bug?).
However, when converting the image in PS to RGB and saving it, IM still sees only one layer. So I am not sure why this is happening.

[snibgo]

CMYK doesn't, alone, prevent IM from seeing layers. For example:

Code: Select all

D:\web\im>%IM%convert -size 100x100 xc:purple xc:pink xc:brown -colorspace CMYK
m.tif

D:\web\im>%IM%identify m.tif
m.tif[0] TIFF 100x100 100x100+0+0 16-bit CMYK 241KB 0.000u 0:00.001
m.tif[1] TIFF 100x100 100x100+0+0 16-bit CMYK 241KB 0.016u 0:00.012
m.tif[2] TIFF 100x100 100x100+0+0 16-bit CMYK 241KB 0.016u 0:00.022

[fmw42]

identify MultiLayer-TIF-test.tif
MultiLayer-TIF-test.tif TIFF 1500x1125 1500x1125+0+0 8-bit CMYK 3.72MB 0.020u 0:00.019
identify: Incompatible type for "RichTIFFIPTC"; tag ignored. `TIFFFetchNormalTag' @ warning/tiff.c/TIFFWarnings/837.

Usually this is just a warning, but it may be that this tag is malformed and has important information in it about the layers.

Also EXIFTOOL thinks it has an alpha channel and shows no information about layers


1006 AlphaChannelsNames : Alpha 1

1024 LayerStateInfo :
1026 LayersGroupInfo :


I do not know enough about this to say if it is relevant or not.

[tlichev]

What info do you need?
Also I wonder why the cases from 2. TIFF to JPG differ: