while converting a gray scale image to tif file for edge detection ;it is showing that the dimension of tif file has changed .how can i make a tif file to 2d image

colormap(gray)
I = imread('grayimage.tif');
imshow(I)

in this the size of colormap(gray) showing 2d image while size(I) showing 3d image

Answer 1

[Nut]

Hi,

try with "rgb2gray":

http://it.mathworks.com/help/matlab/ref/rgb2gray.html

Example for your case:

 colormap(gray)
 I = imread('grayimage.tif');
 I = rgb2gray(I);
 imshow(I)