# UJJWAL

### INRIA, Sophia Antipolis

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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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Domanda

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...

circa 6 anni fa | 4 risposte | 0

### 4

risposteConfused 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...

oltre 8 anni fa | 2

| accettato

Domanda

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...

oltre 8 anni fa | 0 risposte | 0

### 0

risposteDomanda

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 ...

oltre 8 anni fa | 0 risposte | 0

### 0

risposteFeature 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. ...

oltre 10 anni fa | 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...

oltre 10 anni fa | 0

| accettato

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...

oltre 10 anni fa | 0

| accettato

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. ...

oltre 10 anni fa | 0

| accettato

Domanda

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...

oltre 10 anni fa | 1 risposta | 0

### 1

rispostahow 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 ...

oltre 11 anni fa | 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...

oltre 11 anni fa | 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.

oltre 11 anni fa | 0

CAN I GET A CODE FOR AUTOMATIC THRESHOLDING OF IMAGES

Try Otsu's method

circa 12 anni fa | 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...

circa 12 anni fa | 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...

circa 12 anni fa | 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 ...

circa 12 anni fa | 0

Analysis

No . There are no general ways (like inbuilt functions) to compare the performance of algorithms.

circa 12 anni fa | 0

| accettato

Trouble with LL in DWT2

Hi, Jagdeesh, Ok. Now I understand. Previously i was thinking that maybe you are referring to the idwt image of the toolbox. ...

circa 12 anni fa | 0

Convert an image to a matrix and convert to gry scale?

hi, It is so simple. Probably you should refer to the technical support documentations online. Btw the simple answers ar...

circa 12 anni fa | 0

| accettato

Trouble with LL in DWT2

Hi, The problem is with your understanding of the Wavelet Theory. The yy which you are showing is basically the approximatio...

circa 12 anni fa | 0

Image processing problem

Before imshow(y); enter this statement y = uint8(y); Now you will get the correct result. This is because x is of t...

circa 12 anni fa | 1

Help using For and IF loop

I thought it can be done without using a loop. Maybe I could not understand your question properly because you did not elaborate...

circa 12 anni fa | 0

Solution of System of Two First-Order Differential Equation

Go and Look for DSolve in MATLAB Documentation. It will make it clear. In case you still have problems , come back ans ask again...

circa 12 anni fa | 0

| accettato

looking for an explicit answer to my integral

Hi Amir , To solve the integral of a sin(1-1/x), follow the following steps, a) Expand sin(1-1/x) and then integrate. b) ...

circa 12 anni fa | 0

looking for an explicit answer to my integral

The explicit closed form answer exists. It is following , a * (cos(1)*ci(1/x) + sin(1)*si(1/x)+x*sin(1)*cos(1/x)-x*cos(1)*si...

circa 12 anni fa | 0

detecting the corners

MATLAB supports two standard methods for corner detection. Harris and MinimumEigenvalue ?? What method are you using ?? I ...

circa 12 anni fa | 0

need syntax

Hi, Since you mentioned that you just have to add the cyclic prefix, I am writing a code to add the cyclic prefix. The code can...

circa 12 anni fa | 0

| accettato

Signal Processing

Hi, I don't know still exactly how I can help u as the whole GUI thing and all is difficult to post in one answer here. For...

circa 12 anni fa | 1

| accettato

LMS algorithm

Hi, Here is a thought. Suppose the noisy image is im_noisy.jpg. Initially apply a suitable filter or denoising method to den...

circa 12 anni fa | 0

Problem in using IDWT2

The input image is of the type Unsigned Integer of 8 bits (uint8). The output image y is of the type double. So due to the di...

circa 12 anni fa | 0

| accettato