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Renjith V Ravi


19 total contributions since 2016

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Question


How to Write file names of multiple images to a csv file.?
From the code below,I got the file names of multiple images from a folder. clear all close all clc Directory = 'Im...

2 years ago | 1 answer | 0

1

answer

Question


How to read all types images from the folder regardless of file extension ?
The below is my code clear all close all clc Directory = 'Images_folder\'; % Read images from Images folder ...

2 years ago | 2 answers | 0

2

answers

Question


Which parameters ore metrics can be used to differentiate two simple speach signals recorded using the following code?
I have used the following code to record and write speech signals clc clear all close all % Record the voice passw...

2 years ago | 0 answers | 0

0

answers

Question


Which of the following method is correct for finding the image compression ratio in matlab
I am using Huffman coding for image compression.Here I have mentioned three methods for finding the compression ratio. ...

2 years ago | 0 answers | 0

0

answers

Question


Fasten the huffman coding
Is there any possibility to fasten the below code clear all clc %Read the input image Ao=imread('Lena.bmp'); Ao...

2 years ago | 0 answers | 0

0

answers

Question


Finding the compression ratio
I am using the code for SPIHT image compression shown in the link <https://in.mathworks.com/matlabcentral/fileexchange/4808-spih...

2 years ago | 1 answer | 0

1

answer

Question


Kindly help me to understand the following steps
Please help me to understand, what processing is happening for the variable ' *encoded_img* ' in the following code pos...

2 years ago | 0 answers | 0

0

answers

Question


bitmap size and file size
When I run the code shown in the link <http://in.mathworks.com/matlabcentral/fileexchange/13584-compression-ratio>, i got the ou...

2 years ago | 1 answer | 0

1

answer

Question


which one is the correct procedure for summation
I want to implement the following equation <</matlabcentral/answers/uploaded_files/69763/hd.PNG>> Kindly tell me,which met...

3 years ago | 1 answer | 0

1

answer

Question


Histogram deviation or MDMF
I am trying to calculate the histogram deviation(H.D) or Maximum Deviation Measuring Factor(M.D.M.F) as mentioned in <http://...

3 years ago | 0 answers | 0

0

answers

Question


Calculate Histogram deviation or MDMF
I am trying to calculate the histogram deviation(H.D) or Maximum Deviation Measuring Factor(M.D.M.F) as mentioned in <http:...

3 years ago | 1 answer | 0

1

answer

Question


Calculating difference between histograms
Can I use the command Z = imabsdiff(X,Y) for calculating the difference between histograms of two images.

3 years ago | 1 answer | 0

1

answer

Question


Pixel Shuffling and inverse shuffling
I have tried to shuffle the image using tinkerbell map and Henon Map and obtained the output.But I cant do the inverse shuffling...

3 years ago | 2 answers | 0

2

answers

Question


Pixel Shuffling using Chaotic Tinkerbell map(https://en.wikipedia.org/wiki/Tinkerbell_map) and Henon Map(https://en.wikipedia.org/wiki/H%C3%A9non_map)
I have tried to do double shuffling of pixels in an image using Tinkerbell mal and Henon Map.The code is shown below. It is show...

3 years ago | 1 answer | 1

1

answer

Question


How to implement the following equations in image encryption
Upto finding D(i,j),I have found below clear all close all clc im1 = imread('lena.bmp');% Read the input image ...

3 years ago | 1 answer | 0

1

answer

Question


Creation of matrix from loop
The following is a code for creation of matrix using for loop for r = 1:256; for c=1:256; m(r,c) = (r+c)^2; end; e...

3 years ago | 1 answer | 0

1

answer

Question


NIST Statistical Test suite SP 800-22
The 15 randomness tests by NIST coded in C language from the link http://csrc.nist.gov/groups/ST/toolkit/rng/documentation_so...

3 years ago | 0 answers | 0

0

answers

Question


I am trying to shuffle the pixels of an image using chaotic standard map.But I got an error "Subscript indices must either be real positive integers or logicals."
I am trying to shuffle the pixels of an image using chaotic standard map by modifying the code in the link https://in.mathworks....

3 years ago | 1 answer | 0

1

answer

Question


Is it possible to implement the 16 Randomness Tests in Matlab
Mentioned in Chapter 2 of http://csrc.nist.gov/groups/ST/toolkit/rng/documents/SP800-22rev1a.pdf

3 years ago | 1 answer | 0

1

answer