Professional Interests: steganography

Question

blockproc and find best matching block with drms

i have problem with my work with matlab. i would like to know how to find best matching block with Drms. before that, i have to ...

3 years ago | 0 answers | 0

Question

matrix operation make matrix

i have matrix A = rand(64,4), i want to process them to make new matrix where B = (K-A(:,1))*2 . k is multiply every 8, example ...

6 years ago | 1 answer | 0

Question

GUI process calling variable

i have a GUI about steganography. hiding and extract. my program in extract have to call variable in hiding process. what kind o...

6 years ago | 1 answer | 0

Question

matrix operation make matrix

i want to make matrix. for manual way or the output A=[1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 ... 8 8 8 8 8 8 8 8...

6 years ago | 2 answers | 0

Question

matrix operation resize matrix

i have matrix, the size is 36x44. i want to process the matrix so the size is 48x48, but the different or the rest between 36x44...

6 years ago | 1 answer | 0

Question

binary process, biner to decimal

i have binary number 20 bit (uint8), i want to convert the binary number to decimal. i use bin2dec but before i must convert num...

6 years ago | 2 answers | 0

Question

least significant bit process

i have matrix A(64x72). A is bit number. i want to embed every number in A to last bits of image B(RGB) after dec2bin process. t...

6 years ago | 1 answer | 0

Question

cell operattion double to uint8

i have a cell A{64,4} and the type is double. i want to conversion double to uint8. but in matlab it is not possible because A i...

6 years ago | 2 answers | 0

Question

least significant bit process

i have matrix A, let we say, A=rand(1,256). A contains important coefficient. Because A is decimal like 0.xxxx, so i make B=A*10...

6 years ago | 1 answer | 0

Question

mat2cell operation coordinates cell

i have a program from my question in 14 feb 2013, answered by Azzi Abdelmalek. A=rand(4,4,4,4) [ii1,ii2,ii3,ii4]=size(A)...

6 years ago | 0 answers | 0

Question

operation array in cell

A=rand(13,13,8,8); B=rand(13,13,8,8); Z=mat2cell(Temp, [16 16 16 16 16 16 16 16 16 16 16 16 16] , ... [16 16 16 16 16 16 16 ...

6 years ago | 0 answers | 0

Question

operation array in cell

i have 2 matrix A and B and cell Z with 13*13 blocks. each blocks have 8*8 pixel. A=rand(13,13,8,8); B=rand(13,13,8,8); ...

6 years ago | 1 answer | 0

Question

operation array in cell

i have a problem. i have a cell A. cell A have 13*13 blocks (A{1,1},A{1,2},..., A{13,13})and every blocks have 8*8 pixels. i hav...

6 years ago | 1 answer | 0

Question

operation array in cell

i have problem with cell operation. i have 2 cells, first cell is A. A has 8*8 blocks and every blocks has 8*8 pixel. the seco...

6 years ago | 0 answers | 0

Question

mat2cell operation coordinates cell

i have problem with cell operation. i have 2 cells, first cell is A. A has 8*8 blocks and every blocks has 8*8 pixel. the second...

6 years ago | 1 answer | 0

Question

find the value matriks

this is my program. ihave 2 cells c and d. next, i got process rms in mintemp and i got the minimum value and the coordinate of ...

6 years ago | 0 answers | 0

Question

find value from matriks

i have matriks A with size (64,4), so the variables is part of A = [A1 A2 A3 A4] i want to process them, to find a value ei=A3-(...

6 years ago | 2 answers | 0

Question

find the location of minimum value

i have matrix with 4 variables, A=mintemp(a,b,c,d). i have find the minimum value especially at V=mintemp(:,:,1,1) dan the minim...

6 years ago | 3 answers | 0

Question

find the parameter of affine transform

how to find the parameter of affine transform, especially to get the coordinates the block to apply the affine transform to get ...

6 years ago | 0 answers | 0

Question

find the minimum value

i have a matrix A with double class type data. i have to find the minimum value of matrix, the problem is the min function on ma...

6 years ago | 1 answer | 0

Question

mat2cell operation - add operation every cell

i have an mat2cell A 12*12 blocks cell, each cell there's 8*8 pixel. then i have mat2cell B 8*8 blocks cell wih each cell there'...

6 years ago | 0 answers | 0

Question

how to divide image to overlapping blocks

how to divide image to overlapping blocks using blockproc or mat2cell.

6 years ago | 2 answers | 0

Question

how to divide image to overlapping blocks

i have an image 256*256, i want to divide the image to 16*16 every blocks. every 4 pixel, i want to take one blocks and continue...

6 years ago | 1 answer | 0

Question

part of fractal image compression

does anyone know how to partition YUV images to nonoverlapped blocks and overlapped blocks ?? then i have to find best matched b...

7 years ago | 0 answers | 0

Question

matlab code for fractal image compression ?

matlab code for fractal image compression ??

7 years ago | 0 answers | 0

Answered

how to downsample YUV colour image but downsample process only in U and V components ??

thank you for your help, and how about my next question ? about partition images into nonoverlapped blocks ?

how to downsample YUV colour image but downsample process only in U and V components ??

thank you for your help, and how about my next question ? about partition images into nonoverlapped blocks ?

7 years ago | 0

Question

how to downsample YUV colour image but downsample process only in U and V components ??

how to downsample YUV colour image but downsample process only in U and V components ?? and after that, i'm reaaly confused how ...

7 years ago | 2 answers | 0