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umar siyab


studennt

Active since 2011

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luminance of an image
how can i take the luminance of an image in matlab if i have i 256x256 image and i want the luminance of gray scale... what proc...

12 years ago | 1 answer | 1

1

answer

Answered
adding noise
i want my matrix element to be 1 and -1 and matrix should be of 256 by 256

12 years ago | 0

Question


creating matrix of 1 nd -1
how can i generate random matrix of 1 and -1 ... thanks in advance

12 years ago | 2 answers | 0

2

answers

Question


how to add noise to image in frequency domain
if anyone have matlab code for adding noise like guassian exponential gamma salt and pepper religh uniform plz help me.. than...

13 years ago | 1 answer | 0

1

answer

Answered
adding noise
u can use the imnoise() function to add noise to your image ... you can consult the matlab help for further detail..

13 years ago | 0

Question


adding noise to image
how can iadd nosie to image e.g guassian nosie religh noise exponential noise unipolar ets ... can someone help me adding nose c...

13 years ago | 1 answer | 0

1

answer

Answered
peak value at the centre of F(0,0) in magnitude plot of fourier transform
when u want to centre the image u must use the fftshift function afterall your image will center at f(0,0)... the f(0,0) will co...

13 years ago | 0

Question


permutation of a watermark image
i have taken a watermark image and assign -1 value to black and 1 to white to whole watermark now i want permutation of this i...

13 years ago | 1 answer | 0

1

answer