comp.lang.idl-pvwave archive: archive » Re: HIST

Home » Public Forums » archive » Re: HIST_EQUAL

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

Re: HIST_EQUAL [message #23008 is a reply to message #23007]

Sat, 16 December 2000 12:24

Karl Young
Messages: 31
Registered: April 1996

Member

Hey David,

Every once in a while some of us use histograms for something other
than image intensity analysis; i.e. I just wanted to try and restore the
good name of histograms re. not only being used to generate misleading
information ! ;-) And also histogram equalization is pretty useful in
isolating dynamic range problems (i.e. problems for which most of your
data is in a very small part of the entire range of possible values)

David Fanning wrote:

> "Sergio Ahumada N." ("Sergio Ahumada N." <san[@]inf.utfsm.cl>) writes:
>
>> I need to know what's the difference between HISTOGRAM and
>> HIST_EQUAL functions, I don't find so much info about this.
>>
>> Is HIST_EQUAL a graphics of density distribution ?
>
> HIST_EQUAL is a histogram equalization method, whereby
> the pixel values in an image are changed and re-distributed
> in such as way that if you took a histogram of a histogram-
> equalized image, there would be approximately the same
> number of pixels in each histogram bin.
>
> HISTOGRAM is a function for performing black magic on
> IDL arrays...

Report message to a moderator

[Message index]

		Re: HIST_EQUAL By: davidf on Sun, 17 December 2000 05:49
		Re: HIST_EQUAL By: Karl Young on Sat, 16 December 2000 12:24
		Re: HIST_EQUAL By: davidf on Fri, 15 December 2000 12:15

Previous Topic:	dumb surface plot question
Next Topic:	Polygon hull

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sat Nov 29 05:54:40 PST 2025

Total time taken to generate the page: 0.14573 seconds