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JPEG2000 compression [message #43496]

Tue, 12 April 2005 10:48

Roberto Monaco
Messages: 11
Registered: August 2002

Junior Member

I have a question regarding JPEG2000:

How do you control compression ratio when you save an image as JPEG2000
using the IDL object?

The following is curious: within a Photoshop plug-in I use to save JPEG2000
images, "they" define a compression factor. If I save the same image with
different compressions ratios (e.g. 1:1, 1:10, 1:40) I obviously get big
differences in the resulting file sizes. But if you read these files into
IDL objects, surprisingly all properties are exactly the same!! Same
dimensions for the data array, same bit_depth, same number of layers, etc.
?? This does not make any sense to me ... I must be overlooking at something
stupid?

Thanks for any tips.
Roberto

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[Message index]

		JPEG2000 compression By: Roberto Monaco on Tue, 12 April 2005 10:48
		Re: jpeg2000 compression By: Jean H. on Wed, 13 May 2009 06:21

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