# UJJWAL

### INRIA, Sophia Antipolis

I am a PhD student at INRIA, Sophia Antipolis, France.

Professional Interests: Signal Processing, Digital Communications, Wavelets, Image Processing and Pattern Recognition

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**Content Feed**

Question

Image Processing Noise differences

Hi, Suppose I want to add white gaussian noise to an image. I propose to do by following means :- a) imnoise(I,'ga...

5 years ago | 4 answers | 0

### 4

answersConfused about Karhunen-Loeve Transform

Ok.... Let me put it down one by one... Karhunen Loeve Transform relies on the covariance matrix of a set of observation vect...

7 years ago | 2

| accepted

Question

Extracting image patch within an oriented bounding box of MSER

I have a number of MSER regions obtained in an image. I have parameters of its bounding ellipse. I want to find out the image f...

7 years ago | 0 answers | 0

### 0

answersQuestion

What is the fastest way of ignoring MSER responses within a mask ?

Hello, For a given image IM, the MSER regions can be obtained by using detectMSERFeatures function. Now Suppose, there is a ...

7 years ago | 0 answers | 0

### 0

answersSubmitted

Discrete Fourier Transform over Hexagonally Sampled Data

Provided codes implement the DFT and IDFT for hexagonal lattices

9 years ago | 5 downloads |

Feature Extraction & Selection from a standard Face Image.

Your question is not very clear. What do you want to do with the face images? Is it a detection problem or recognition problem. ...

9 years ago | 0

write command for wavelet packet tree does not seem to work

I was able to solve this problem through debugging the internals of the write function. I found that the write function is recur...

9 years ago | 0

| accepted

To separate a set of data into two groups

You need to mention whether you want data to be divided randomly or is there a certain sequence or rule following which you want...

9 years ago | 0

| accepted

For loop or if condition?

First of all, this is not a correctly asked question. Put your code in a correct format and be of a more explanatory nature. ...

9 years ago | 0

| accepted

Question

write command for wavelet packet tree does not seem to work

Hi, I am trying to create an empty wavelet packet tree and filling up its terminal nodes with coefficients. In short followin...

9 years ago | 1 answer | 0

### 1

answerSolved

Finding Perfect Squares

Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

10 years ago

Solved

Pizza!

Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

10 years ago

Solved

Fibonacci sequence

Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

10 years ago

Solved

Swap the first and last columns

Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

10 years ago

Solved

Triangle Numbers

Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

10 years ago

Solved

Column Removal

Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

10 years ago

Solved

Select every other element of a vector

Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

10 years ago

Solved

Determine if input is odd

Given the input n, return true if n is odd or false if n is even.

10 years ago

Solved

Find the sum of all the numbers of the input vector

Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

10 years ago

Solved

Make the vector [1 2 3 4 5 6 7 8 9 10]

In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

10 years ago

Solved

Times 2 - START HERE

Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

10 years ago

how to add constant noise in image in matlab function?

There is nothing like a constant noise. If you are willing to add noise with constant statistics, you might want to explore the ...

10 years ago | 0

Segmenting a low contrast image

@Kittu Please ask the question in a clear language that makes sense to all. I understand that you want to do some kind of se...

10 years ago | 0

Matlab imshow() not showing the image properly

I would really request you to post the image file so that others could also try it.

10 years ago | 0

calculating the intensity

It is not a problem which is simple. It is a complicated problem of biomedical image processing. I would not comment over the so...

11 years ago | 0

Matlab curve fitting toolbox

You want to do it programmatically and it can be done but being a new user you may find it a bit difficult. There is a curve fit...

11 years ago | 0

Specify one dimension as variable size in Matlab Coder

Hi, Although i did not understand your question very well but this is i think is your question :- If you want to create a ...

11 years ago | 0