Rank: 310 based on 356 downloads (last 30 days) and 5 files submitted
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Vinay Kumar Tadepalli

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Bits-Pilani

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Professional Interests:
Image Processing, compression techniques

 

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Files Posted by Vinay Kumar View all
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22 Apr 2013 K means clustering for Image Compression K-means clustering is a popular vector quantization method for data compression. Author: Vinay Kumar Tadepalli image processing, simulation, demo, mathematics, signal processing, matrix 51 8
  • 3.0
3.0 | 1 rating
25 Apr 2012 Arithmetic Encoding & Decoding Arithmetic coding is a popular encoding technique in compression engines. Author: Vinay Kumar Tadepalli signal processing, data import, simulation, mathematics 57 12
  • 5.0
5.0 | 1 rating
17 Apr 2012 Panning Effect on a Mono-Audio Input Panning effect is implemented for both an audio file and any audio input device such as microphone. Author: Vinay Kumar Tadepalli communications, data import, signal processing, simulation, matrix 20 0
07 Feb 2012 Compression Techniques Huffman, Extended Huffman, Arithmetic, LZ78, Run Length Encoding, Run Length Decoding, DCT Author: Vinay Kumar Tadepalli image processing, communications, statistics, mathematics 43 2
  • 4.33333
4.3 | 3 ratings
07 Feb 2012 Screenshot JPEG Compression (DCT) JPEG compression using Discrete Cosine Transform Technique Author: Vinay Kumar Tadepalli image processing, simulation, signal processing, communications, thanks for code, but when i run it i h... 185 19
  • 3.66667
3.7 | 6 ratings
Comments and Ratings by Vinay Kumar View all
Updated File Comments Rating
01 Dec 2013 Arithmetic Encoding & Decoding Arithmetic coding is a popular encoding technique in compression engines. Author: Vinay Kumar Tadepalli

Dear Rathnam,

Bitplane coding is nothing but chopping off bits for each image plane (incase of color image) to reduce amount of memory utilized. And important point is that most signifcant bit contains the most information, while the least signifcant bit contains only minute information of image. For example, if you set the 2 LSBs to 0, then you will see a blurred version of the image.
After using bit-plane coding, you may use run-length/level encoding to perform compression.

06 Mar 2013 GetFullPath Full path name for partial or relative path Author: Jan Simon

04 Mar 2013 Arithmetic Encoding & Decoding Arithmetic coding is a popular encoding technique in compression engines. Author: Vinay Kumar Tadepalli

Dear Le Hung,

Its working fine. I have checked after you commented. Please tell me your issue with the execution of code!!

23 Feb 2013 JPEG Compression (DCT) JPEG compression using Discrete Cosine Transform Technique Author: Vinay Kumar Tadepalli

Dear Andrew,

The n indicate the pixel depth of the input image. So, for an RGB Color image, it is 24, and for a monochrome image (gray scale image), it is 8 bits. And m indicates the amount of compression that you can afford. The range of m should be [1, n]. For example, when you are computing DCT for an 8-bit image, the DCT coefficients you obtain are normalized with normalization matrix and then rounded off (normalization+rounding off = quantization). And then these Quantized coefficients are converted to binary form and NOW you have a choice whether to retain all the bits of each DCT coefficient or only some. That will be specified by the user as m.

Note that both m and n are positive integers.

Hope it cleared your doubts.

12 Jan 2013 JPEG Compression (DCT) JPEG compression using Discrete Cosine Transform Technique Author: Vinay Kumar Tadepalli

Dear Mehdi, the code is not generalized for Images of arbitrary sizes. So, you have to include a code for padding additional rows and columns to make row number and column number a multiple of 2. That should solve the problem. If you have any other issues, let me know.

Comments and Ratings on Vinay Kumar's Files View all
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13 Aug 2014 JPEG Compression (DCT) JPEG compression using Discrete Cosine Transform Technique Author: Vinay Kumar Tadepalli fateh

i got error at this line..
Error using dct1 (line 11)
Not enough input arguments.

07 Jul 2014 JPEG Compression (DCT) JPEG compression using Discrete Cosine Transform Technique Author: Vinay Kumar Tadepalli khosravi, hediye

dear Vinay,thanks for your usful code,but when i run it this error acure:
??? Error using ==> minus
Matrix dimensions must agree.

Error in ==> dct1 at 325
diff=im2double(I)*255-I_rec;

plz help me to run your code!

13 May 2014 JPEG Compression (DCT) JPEG compression using Discrete Cosine Transform Technique Author: Vinay Kumar Tadepalli Panjaitan, Christin

I want to compress Depth Map 16-bit.
Is it possible ?

26 Apr 2014 K means clustering for Image Compression K-means clustering is a popular vector quantization method for data compression. Author: Vinay Kumar Tadepalli amir

23 Apr 2014 Arithmetic Encoding & Decoding Arithmetic coding is a popular encoding technique in compression engines. Author: Vinay Kumar Tadepalli priya

respected sir,
how to display an image in the form of a matrix?
how to find the probability of each of the intensities of the image?

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