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Thread Subject:
Nlfilter_extremely slow

Subject: Nlfilter_extremely slow

From: doug kopet

Date: 22 Aug, 2010 07:33:04

Message: 1 of 1

Hello guys,

With the help of ImageAnalyst, I am using 2 functions below for using nfilter. but the problem is that its very slow...too slow.

I'd like to ask for some help on a faster option for processing time.

You can get my image at :

http://yfrog.com/j6dougyspicp

or

http://img690.imageshack.us/i/dougyspic.png/


%=========================================
clc;
clear all;
close all;


A = imread('dougyspic.png');

IM_Original = rgb2gray(A) ;


Block = [ 500 500];
 
standardDeviationFunction = @(x) std2(x(:));
standardDeviationImage = nlfilter(IM_Original, Block, standardDeviationFunction);


MeanFilterFunction = @(x) mean2(x(:));
meanImage = nlfilter(IM_Original, Block, MeanFilterFunction);
%=========================================


cheers
dougy

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