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Re: what is an efficient lossless compression way to store a gray-scale image [message #36255]

Wed, 27 August 2003 10:36

Stein Vidar Hagfors H[2] is currently offline

Stein Vidar Hagfors H[2]
Messages: 28
Registered: October 2002

Junior Member

Jonathan Boswell <jsb@ost.cdrh.fda.gov> writes:

> Julia wrote:
>> seems that there is no way to store gray-scale images in IDL
>> efficiently...
>
> I believe GIF is lossless if you have fewer than 256 "colors". What version of
> IDL do you have? There are licensing issues pertaining to the LZW compression
> used by the GIF standard, and recent versions of IDL will not run WRITE_GIF w/o
> additional expense.
>

See WRITE_PNG - 2D arrays work with or without a palette, on 8 or 16
bits per channel.

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Stein Vidar Hagfors Haugan
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		Re: what is an efficient lossless compression way to store a gray-scale image By: Stein Vidar Hagfors H[2] on Wed, 27 August 2003 10:36
		Re: what is an efficient lossless compression way to store a gray-scale image By: Jonathan Boswell on Tue, 26 August 2003 10:59

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