comp.lang.idl-pvwave archive: archive » Q: uniq value in an image?

Home » Public Forums » archive » Q: uniq value in an image?

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Q: uniq value in an image? [message #11926 is a reply to message #11835]

Sun, 31 May 1998 00:00

steinhh
Messages: 260
Registered: June 1994

Senior Member

In article <MPG.fd92945577ce4819897bf@news.frii.com>
davidf@dfanning.com (David Fanning) writes:

David Fanning wrote:

> I I'm too tired tonight to test this, but how about something
> like this:
>
> unique_values = Where(Histogram(image) EQ 1)
> Print, (Histogram(image))[unique_values]

I think (?) Herbert Tsang wants "all distinct values" present in
his image, in that case it would mean:

min = min(image)
hist = histogram(image,min=min)
values = min + where(hist)

But of course, this only works if his image consists of integers
only. Floating point valued images would be a real mess to do
properly! If it does make sense to speak of discrete values
from a floating point image, then do convert your image to an
integer image in the first place.

Regards,

Stein Vidar

Report message to a moderator

[Message index]

		Q: uniq value in an image? By: htsang on Fri, 29 May 1998 00:00
		Re: Q: uniq value in an image? By: steinhh on Sun, 31 May 1998 00:00

Previous Topic:	Re: ION Experiences?
Next Topic:	ION Experiences?

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sat Oct 11 05:13:58 PDT 2025

Total time taken to generate the page: 1.92020 seconds