# Youssra

### Mohemmed Ben Abdellah University

Active since 2015

Followers: 0   Following: 0

Master Degree

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Question

How to implement ABC algorithm for image watermarking?
Hello, I'm working on image watermarking, and I'm trying to use ABC (Artifical Bee Colony) algorithm to optimize scaling facto...

7 years ago | 1 answer | 0

### 1

Question

Why the division of two positive values gives negative value?
Hello,I'm using the following code to find a positive factor: [U S V] = svd(image, 'econ'); % calculate the SVD of the imag...

8 years ago | 1 answer | 0

### 1

Question

How to choose non sensitive coefficients for watermarking?
Hello, I'm working on image watermarking, I'm working with DWT and SVD and I want to embed a watermark in some coefficients that...

8 years ago | 0 answers | 0

### 0

Question

Convert binary values to a decimal matrix
Hello, Suppose that I have a matrix a= [1 3; 4 2], I convert this matrix to binary format using this code: a=magic(2...

8 years ago | 1 answer | 0

### 1

Question

convert a binary image to RGB color space
Hello, I have RGB image that I converted to binary to do some processing and I want to reconvert it back to its original color R...

9 years ago | 2 answers | 0

### 2

Question

Getting many outputs using blockproc
I want to apply SVD for each 4*4 blocks using the "blockproc" and get 3 outputs: U, S and V so I can reconstract all blocks toge...

9 years ago | 3 answers | 0

### 3

Question

how to detect a watermark
Hello, How do we know if an image is watermarked? Is there any function helps us to detect a waetermak before extracting it? ...

9 years ago | 0 answers | 0

### 0

Question

Problem with Watermarking in HSV color space
I'm trying to apply a DWT-SVD watermaking in HSV color space, but the final watermarked image is defenitely different than the o...

9 years ago | 0 answers | 0