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amitesh kumar


Active since 2011

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Professional Interests: Image processing

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Question


Normalised Correlation Value after applying DCT
Hello everyone i am applying image normalization technique and DCT technique for embedding and extraction watermark image. he...

bijna 14 jaar ago | 0 answers | 0

0

answers

Question


CDMA based using multiple PN sequences embeded into whole object
hii everyone I am trying to run this watermark embedding code. my cover image size is 512x512, watermark image is 64x64 and...

bijna 14 jaar ago | 0 answers | 0

0

answers

Question


Image extraction from Watermarked image
Hello everyone... I am trying to extract "watermark image" from a watermarked image. For this i am selecting original image o...

bijna 14 jaar ago | 1 answer | 0

1

answer

Question


watermark Embedding in Blocks
hello everyone i want to embed watermark in image of size 512*512 & watermark size is 64*64. first of all i am converting origi...

bijna 14 jaar ago | 3 answers | 1

3

answers

Answered
Error in Image Embedding....
thnku so much *Walter*...got executed prog successfully...i am getting original image, watermark image in perfect manner ..but t...

bijna 14 jaar ago | 0

Answered
Error in Image Embedding....
Thnx sir for ur answer. w(m,n)=0; planes{8}=ones(m,n); planes{8}= and(planes{8},w); % Adding the WaterMark ...

bijna 14 jaar ago | 0

Question


Error in Image Embedding....
Hello i am trying to run following code... i=imread('lena.tif'); s=double(i); j=imread('watermark.bmp'); w=double(j); ...

bijna 14 jaar ago | 3 answers | 0

3

answers

Question


DCT transformation
hello i am trying to apply DCT transformation on image of size 512*512. for applying DCT i use following code I = im2doub...

ongeveer 14 jaar ago | 1 answer | 0

1

answer

Answered
How do I fix a "Subscripted assignment dimension mismatch."
%This program decode the watermark from the single embed watermarked image clc c=1; t=1; %To read in the watermarked image ...

ongeveer 14 jaar ago | 0

Question


How do I fix a "Subscripted assignment dimension mismatch."
clc c=1; t=1; % To read in the watermarked image [watermarked_image cmap]=imread('lsb_image.bmp'); waterma...

ongeveer 14 jaar ago | 3 answers | 0

3

answers

Question


how to get low pass filter from image
When I am trying to run the following code, it is giving an error [ ??? Input argument "P" is undefined. Error in ==> idealf...

ongeveer 14 jaar ago | 1 answer | 0

1

answer

Question


Low-pass filter for image
When I am trying to run the following code, it is giving an error [ ??? Input argument "P" is undefined. Error in ==> i...

ongeveer 14 jaar ago | 2 answers | 0

2

answers

Question


Image retrieving
is it possible to get the original image back after applying fft and log polar transformation on image and its inverse .plz rep...

ongeveer 14 jaar ago | 1 answer | 0

1

answer

Question


Hadamard Transformation
Hello everyone I would like to know that how to generate *Complex Hadamard Transformation Matrix* for N*N matrix . Is it poss...

ongeveer 14 jaar ago | 1 answer | 0

1

answer

Question


Complex to Imaginary & Vice -Versa
Hello everyone I am applying fft on image which giving me complex value . for getting magnitude i am using " X = abs(Y)" f...

ongeveer 14 jaar ago | 2 answers | 0

2

answers

Question


log-polar mapping conversion
I want to change 512*512 pixel gray image into log-polar format. What is the exact procedure to convert it. I tried this with th...

ongeveer 14 jaar ago | 2 answers | 0

2

answers