Community Profile # Rawan hamdi

### GUC

Active since 2013

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Question

how to plot a hyperspectral image in matlab?
Hi, I've used these 2 lines SIZE = [1208,307 ,191]; X = multibandread('dc.tif', SIZE, 'int16',1, 'bsq', 'ieee-le'); ...

mer än 6 år ago | 1 answer | 1

### 1

Question

How to perform rotation of an image around it's center?
Hi, I want to rotate an image around it's center by the following steps: 1)Translate the image to the origin so that it's cent...

mer än 8 år ago | 1 answer | 0

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Question

How to apply wavelet shrinkage denoising on gray scale images?
Hi, i've tried using wden function to denoise an image but it's only used for 1D signals,any help?

mer än 9 år ago | 0 answers | 0

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Question

How to implement the augmented lagarangian method?
Hi, i have a function like this x = ||g-u||.^2 + lambda.*R where g,u and R are matrices of same size,and l...

mer än 9 år ago | 0 answers | 0

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Question

how to apply augmented lagarangian method to optimize an equation?
Hi, i'm having an equation : x = argmin ||g-u|| where g and u are 2 matrices of size [280,307,191] and i would like to optim...

mer än 9 år ago | 0 answers | 0

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Question

How to get arg min of an N-dimensional Matrix ?
Hi, i'm having an image of size[280,307,191] and i want to get the argmin of it,Any help?

mer än 9 år ago | 4 answers | 0

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Question

How to get a matrix from a least squares equation?
Hi, If i have this term arg min ||Ax-b|| and i used this code to get x x = lsqnonneg(A,b) How can i obtain x in a matrix...

mer än 9 år ago | 0 answers | 0

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Question

How to optimize a function ?
Hi, i'm running a denoising algorithm on an image which is 3D image and i'm trying to implement some equations and i need help h...

mer än 9 år ago | 1 answer | 0

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Question

how to get SNR for 2 images
hi, i have 2 images and i would like to get SNR between these 2 images. i have an original clean image which is X0, i added ...

mer än 9 år ago | 1 answer | 0

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Question

How can i implement least squares of the difference between 2 matrices?
Hi, I'm trying to get the least squares of the difference between 2 matrices argmin ||g-u|| both g and u are matrices of ...

mer än 9 år ago | 1 answer | 0

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Question

How to raise the tolerance in 'lsqnonneg'
Matlab Exiting: Iteration count is exceeded, exiting LSQNONNEG,Try raising the tolerance (OPTIONS.TolX).

mer än 9 år ago | 0 answers | 0

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Question

how can i get the PSNR for an multibanded image?
Hi, I have an image which is [307,280,191] and i added some noise to it and i want to get the PSNR between the 2 images (origin...

mer än 9 år ago | 1 answer | 0

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Question

How to implement the cost function?
Hi, Can anyone help me understand how to implement the cost function: u = arg min(||g-u||).^2 + lambda.R(u) where the term "...

mer än 9 år ago | 0 answers | 0

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Question

How to multiply elements of a matrix by a number
Hi, I'm having a matrix of size X= [280,307,191] and i want to restore the matrix such that the 3rd dimension of the matrix is ...

mer än 9 år ago | 2 answers | 0

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How to loop on a data cube of an image
I've tried this: x= squeeze(X(1,:,1)); y =squeeze(X(:,1,1)); b = X(1,1,:); for i=1:x for j =1 : y ...

mer än 9 år ago | 0

how to get gradient of an image
i'm using version 2010a of Matlab and there's no function called 'imgradient' Any help?

mer än 9 år ago | 0

Question

How to loop on a data cube of an image
Hi, I'm trying to calculate gradient at each pixel in a data cube of an image an i'm getting this error "index out of bounds be...

mer än 9 år ago | 0 answers | 0

### 0

Question

How to loop on a data cube of an image
Hi, I'm trying to calculate gradient at each pixel in a data cube of an image an i'm getting this error "index out of bounds be...

mer än 9 år ago | 3 answers | 0

### 3

Question

how to get gradient of an image
hi im having a hyperspectral image and im trying to get the gradient operators of the horizontal and vertical directions but i c...

mer än 9 år ago | 4 answers | 0