How do I find the offset in a tiff stack?
It is the value of tag 273 (StripOffsets), which you find by opening
the stack in ImageJ with "Debug Mode" checked in Edit>Options>Misc.
-wayne
On Nov 22, 2005, at 10:44 AM, Wayne Rasband wrote:
>> I am generating very large stacks and it would often be useful
>> when importing a stack of images to only open a subset of
>> the stack. Such as the first 100 slices or every third slice.
>> Is there a way to do this?
>
> You may be able to do this using the File>Import>Raw command if the
> images are uncompressed TIFFs, you know the offset to the first
> image, and the images are stored consecutively. For example, you
> can import the first 10 slices of a 100 slice stack of 512x512 16-
> bit images using the macro
>
> run("Raw...", "width=512 height=512 offset=768 number=10 gap=0")
>
> You can import every third slice using the macro
>
> run("Raw...", "width=512 height=512 offset=768 number=33
> gap=1048576")
>
> These macros assumes the TIFF stack was created by ImageJ, where
> the offset to the start of the image data is always 768. To import
> every third slice the gap must be set to 512*512*2*2 (1048576).
>
> -wayne
>
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