using other image following error is coming.lena.jpg is not giving any error

Error using medfilt2 Expected input number 1, A, to be two-dimensional.

Error in medfilt2>parse_inputs (line 107) validateattributes(a, ...

Error in medfilt2 (line 48) [a, mn, padopt] = parse_inputs(varargin{:});

Error in maingui1>noisyimg_Callback (line 124) median_image=medfilt2(im_n)

Error in gui_mainfcn (line 95) feval(varargin{:});

[Walter Roberson]

Your lena.jpg is not producing an error for you because you are not reading it properly. You should be using

[im, cmap] = imread([p f]);
if ~isempty(cmap); im = ind2rgb(im, cmap); end

After that even lena.jpg will start producing problems, because you are not prepared to deal with color images.

Your lena.jpg is not a JPEG image: it is a BMP that has been named as if it were a JPEG image.

[Komal Gaikwad]

OK thnx,but i need black and white image coz making changes in code will lead to problem.

[Walter Roberson]

You should be editing your code to have the above lines, and then either

if ndims(im) > 2; im = rgb2gray(im); end

or else

im = im2bw(im, graythresh(im));

Answer 1

[Image Analyst]

You probably had your image as a color image. You need to call medfilt2 on each color channel one at a time, or else convert your image to grayscale with rgb2gray().

[Komal Gaikwad]

Sir Image analyst what does 225x225x3 ("3"means)

[Image Analyst]

It means your array (image) is 225 rows and 225 columns, and 3 color channels (red, green, and blue).

[Komal Gaikwad]

i dnt want 3 color channels how to convert,i want only 256rows and 256 coloumns??

[Komal Gaikwad]

sir i want only gray image withou 3 channels,i searched but could not find ,also i cant convert coz it will lead to change my code on most of the places so can u please give the source of some black and white images having no color channes or share some images with me.

[Ameer Hamza]

Use rgb2gray() to convert 3 channels to single-channel grayscale image

[Komal Gaikwad]

Sir i tried using this command ,but in my code it is giving error for different function.

[Walter Roberson]

Once you use rgb2gray() then what is the new error that shows up?