how to convert rgb image to 11*92 grayscale image of type 'pgm' ?
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wen I try to conert an image using photo editor, the converted image size will b 112 92 3.. i.e. dimension wil b 3,, how can make it 1D?
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Answers (2)
David Sanchez
on 19 Dec 2013
First use
gray_image = rgb2gray(RGB_image);
The rescale the image:
B = imresize(gray_image, scale)
Take a look at
doc rgb2gray
doc imresize
The order of the operations can be reverse.
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Image Analyst
on 19 Dec 2013
% Convert to grayscale.
grayImage = rgb2gray(rgbImage);
% Resize to 11*92 or 112*92 (whatever is wanted), if necessary.
grayImage = imresize(grayImage, [112, 92]);
% Convert to pgm format disk file
imwrite(grayImage, 'myFile.pgm');
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