Question

Masking in DCT Compression

I am trying to do image compression in DCT. Can someone please help me understand how masking affects bit per pixel in DCT? How ...

6 years ago | 0 answers | 0

Question

How does MSB affect the compression ratio of an image?

I would like to ask if there is a way the Most Significant Bit(MSB) in DCT compression affects the quality of the image or the i...

6 years ago | 0 answers | 0

Question

I would like to apply DCT to each element in a matrix

I have a code where i take every 8*8 block of a 512*512 image and find its average, and subtract it away, storing the result int...

6 years ago | 1 answer | 0

Question

Explanation to do with image bitrate(bpp) allocation

I would like someone to help me with an explanation of how bit allocation is done in the DCT image compression technique. I have...

6 years ago | 0 answers | 0

Question

Reading a double image

I have encoded and decoded a 256*256 image. At first i did it using the image in "*uint8" precision and everything works well. b...

6 years ago | 1 answer | 0

Answered

Form a matrix from a structure

Thanks to Azzi and Cedric o was able to get a step forward. however my question now is, i have managed to extract all the binary...

Form a matrix from a structure

Thanks to Azzi and Cedric o was able to get a step forward. however my question now is, i have managed to extract all the binary...

6 years ago | 0

Question

Form a matrix from a structure

I have a 32*32 data structure. There are 1*1 structures in each of those 32*32 cells. However, i would like to extract all the b...

6 years ago | 3 answers | 0

Question

Extracting data from a structure

I have performed DCT on an image(256×256) and the the compressed data is saved in a file. When i open this file in workspace, th...

6 years ago | 1 answer | 0

Question

How to save a c++ readable Mat file

I am running a DCT code in matlab and i would like to read the compressed file(.mat) into a c code. However, am not sure this is...

6 years ago | 1 answer | 0

Question

How to calculate the Compression ratio

Hi, could someone explain to me how to calculate the compression ratio of an image from the quantization bit allocation? I tho...

6 years ago | 1 answer | 0

Question

Not enough input arguments.

I am trying to implement DCT compression and save the quantized coefficients into a file that will be read into another program....

7 years ago | 0 answers | 0

Question

I have these two codes. Can someone help me determine whats wrong with them.

For the "jpegcomp" code, i get an error message telling me to "% load file of variables containing a gray image matrix" even whe...

7 years ago | 1 answer | 0

Question

How do i calculate the affine transformations of an image?

I am doing some research on fractal image compression but i am not well conversant with many things yet. I would like to ask how...

7 years ago | 1 answer | 0

Question

I need help with the Matlab R2007b commands

I am researching on image compression ans i happen to be using matlab version r2007b but i realize that some of the matlab comma...

7 years ago | 2 answers | 0