problem with the use of medfilt2

i want to reduce the noise of my image after i apply histogram equalization but i cannot seem to make it work.

I1 = rgb2gray(image1);

i1 = histeq(I1);

med1 = medfilt2(i1)

axes(handles.axes7);

imshow(med1);

[Akiva Gordon]

Could you please elaborate on what you mean by, "I cannot seem to make it work."? Are you getting error messages or unexpected/undesirable results? What is your expected/desired outcome?

[Walter Roberson]

try

imshow(med1, [])

[Image Analyst]

Should not be necessary unless image1 was a floating point rgb image, which would be very rare/unusual. If image1 is uint8, then I1 and i1 and med1 will all be uint8 also, and so [] would just scale the image for display but it should have displayed even with out that.

Answer 1

[Image Analyst]

Try this code and see if it works.

image1 = imread('peppers.png');
I1 = rgb2gray(image1);
i1 = histeq(I1);
med1 = medfilt2(i1);
imshow(med1);

It's essentially your code and works fine for me.

Answer 2

[Nidhi Adakoli]

clc;

close all;

clear all;

f=imread('nid1.jpg');

% fg=rgb2gray(f);

figure(1);imshow(f,[]);

fn=imnoise(f, 'salt & pepper', 0.1);%add 10% salt & pepper noise

figure(2)

subplot(2,2,1);

imshow(f);title('original image');

subplot(2,2,2);

imshow(fn);title('10% salt & pepper noise');

% noise removal by using average filter

w=[1 1 1; 1 1 1;1 1 1]*(1/9);

f_avg1=imfilter(fn,w,'conv');

subplot(2,2,3);

imshow(f_avg1);title('average filtered image');

%noise removal by using median filter

f_med1=medfilt2(fn);

subplot(2,2,4);

imshow(f_med1);title('median filtered image');

I am finding problem with line number 19 that is using median Average filter, it shoots up an error!

[Image Analyst]

You forgot to attach nid1.jpg and the error message. You should probably start your own question for this rather than tack onto Joanna's discussion.