8 bit of size 256*256 grey image for testing

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hi every one please I want copy of 8 bit of size 256*256 grey image for such as lena, Baboon, Peppers

Accepted Answer

Walter Roberson
Walter Roberson on 24 Nov 2015
imread() the color image, rgb2gray() it, imresize() it to 256 x 256 or imresize() it to 256 on the shorter side and imcrop() the rest of the longer side away if the image is not originally square.

More Answers (1)

Image Analyst
Image Analyst on 24 Nov 2015
Lena is available here: http://www.cs.cmu.edu/~chuck/lennapg/ or here: http://www.lenna.org/full/len_full.html. Note: the second link is the full image which contains nudity. Playboy has given permission to use the cropped version in research.
Peppers is a standard demo image that ships with the Image Processing Toolbox. You can get a gray scale version like this
rgbImage = imread('peppers.png');
grayImage = rgb2gray(rgbImage);
imwrite(grayImage, 'grayPeppers.png');
To get the mandrill baboon demo image in gray scale, do this:
storedStructure = load('mandrill.mat')
rgbImage = ind2rgb(storedStructure.X, storedStructure.map);
grayImage = rgb2gray(rgbImage);
imwrite(grayImage, 'grayMandrill.png');


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