Thread Subject: How to count the number of each intensity value?

Hi all,
I have 12-bit images, and I want to calculate the probability of each intensity value which appears in this image? Is there any good idea?

thanks a looooot :-)

Dear Milchkaffee!

> I have 12-bit images, and I want to calculate the probability of each intensity value which appears in this image? Is there any good idea?

help histc

Or equivalent function:
  S = sort(reshape(Image, 1, []));
  F = find([1, diff(S)]);
  A = S(F); % Sorted intensities
  N = diff([F, length(S) + 1]); % Number of occurrences

Kind regards, Jan

"Milchkaffee " <zhengzhu_@hotmail.com> wrote in message <heeceh$etj$1@fred.mathworks.com>...
> Hi all,
> I have 12-bit images, and I want to calculate the probability of each intensity value which appears in this image? Is there any good idea?
>
> thanks a looooot :-)

Use HIST or HISTC

Bruno

Dear Jan,
thank you very much for your fast answer, I'll try it immediately... :-D

best wishies!
"Jan Simon" <matlab.THIS_YEAR@nMINUSsimon.de> wrote in message <heefr1$hro$1@fred.mathworks.com>...
> Dear Milchkaffee!
>
> > I have 12-bit images, and I want to calculate the probability of each intensity value which appears in this image? Is there any good idea?
>
> help histc
>
> Or equivalent function:
> S = sort(reshape(Image, 1, []));
> F = find([1, diff(S)]);
> A = S(F); % Sorted intensities
> N = diff([F, length(S) + 1]); % Number of occurrences
>
> Kind regards, Jan