how to mask an image?

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sheno39
sheno39 il 19 Set 2013
I = imread('E:\M.E 3rd semester\project\coding\flower.jpg');
I = rgb2gray(I);
J=ones(3,3)/9;
K = conv2(I,J,'same');
Warning: CONV2 on values of class UINT8 is obsolete. Use CONV2(DOUBLE(A),DOUBLE(B)) or CONV2(SINGLE(A),SINGLE(B)) instead.
Can anyone help to correct the error?
  2 Commenti
Image Analyst
Image Analyst il 19 Set 2013
That's not masking an image - that's blurring it with a box (or sliding mean) filter. But like the others said, you need to case to double before convolving. Masking would be like setting inside or outside a region to some value or creating an ROI. For example you could mask your image so that the blurring just occurred inside a big circle in the middle of your image. Let me know if you want a masking demo.
sheno39
sheno39 il 20 Set 2013
Thanks for your explanation. As am new to image processing in matlab it would be more helpful to me.

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Risposta accettata

Anand
Anand il 19 Set 2013
I = im2double(imread('..'));
I = rgb2gray(I);
J = ones(3)/9;
K = conv2(I,J,'same');

Più risposte (2)

Image Analyst
Image Analyst il 20 Set 2013
Modificato: Image Analyst il 20 Set 2013
Regarding your comment asking for a masking demo, one of mine is attached. Click on it below to see it.

Matt J
Matt J il 19 Set 2013
I = double(rgb2gray(I));
  3 Commenti
Matt J
Matt J il 19 Set 2013
I = imread('E:\M.E 3rd semester\project\coding\flower.jpg');
I = double(rgb2gray(I));
sheno39
sheno39 il 20 Set 2013
thank you..

Accedi per commentare.

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