# Renjith V Ravi

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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...

5 years ago | 1 answer | 0

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answerQuestion

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 ...

5 years ago | 3 answers | 0

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answersQuestion

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...

5 years ago | 0 answers | 0

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answersQuestion

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. ...

5 years ago | 1 answer | 0

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answerQuestion

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...

5 years ago | 0 answers | 0

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answersQuestion

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...

5 years ago | 1 answer | 0

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answerQuestion

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...

5 years ago | 0 answers | 0

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answersQuestion

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...

5 years ago | 1 answer | 0

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answerQuestion

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...

5 years ago | 1 answer | 0

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answerQuestion

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://...

5 years ago | 0 answers | 0

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answersQuestion

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:...

5 years ago | 1 answer | 0

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answerQuestion

Calculating difference between histograms

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

5 years ago | 1 answer | 0

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answerQuestion

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...

5 years ago | 2 answers | 0

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answersQuestion

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...

5 years ago | 1 answer | 1

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answerQuestion

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 ...

5 years ago | 1 answer | 0

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answerQuestion

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...

6 years ago | 1 answer | 0

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answerQuestion

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...

6 years ago | 0 answers | 0

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answersQuestion

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....

6 years ago | 1 answer | 0

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answerQuestion

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

6 years ago | 1 answer | 0