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Re: Byte-Scaling Tiff Stacks [message #49425 is a reply to message #49346]

Fri, 21 July 2006 11:36

Magdalena83
Messages: 2
Registered: July 2006

Junior Member

Thanks for replying; here are my answers for your inquiries:
> Could you post to the news group the following...
>
> print, SIZE(image_name)
3 512 170 492 1 42823680
print, MIN(image_name)
0
> print, MAX(image_name)
255
> DEVICE, GET_DECOMPOSED = thisDecomp
> print, thisDecomp
0
>
> Also, what do you mean by "black and white images"? Do you really mean
> greyscale or do you mean bilevel (like 0 and 1 or 0 and 255)?
Sorry, I meant 16-bit grayscale images.

IDL can read them fine if I convert the tiffs to 8-bits in ImageJ
beforehand, but I am worried that I will lose too much info by doing
this. I believe that byte-scaling should fix the problem, but "bytscl"
isn't working.

Basically, I am looking for the best way to read in stacks of 16-bit
tiff images so that I can perform alignment procedures on them and then
FFT certain pixels to search for oscillations in intensity.

The data was originally .fits format, but I flatted and dark-subtracted
them in ImageJ, which can't write .fits files. Thus, I now have a stack
of 2500 .tif frames ready to be aligned, but IDL doesn't read them
correctly.
Thanks for any advice you can give.

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[Message index]

		Byte-Scaling Tiff Stacks By: Magdalena83 on Thu, 20 July 2006 07:54
		Re: Byte-Scaling Tiff Stacks By: btt on Fri, 21 July 2006 12:34
		Re: Byte-Scaling Tiff Stacks By: Magdalena83 on Fri, 21 July 2006 11:36
		Re: Byte-Scaling Tiff Stacks By: btt on Fri, 21 July 2006 06:47

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