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Urmila


Active since 2013

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Student at college of engg, pune,

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pixel acessing in xillinx using vhdl
I have stored pixels of image in brom in xilinx using vhdl , now i dont understand how to acess each pixel.plz help me.

10 years ago | 0 answers | 0

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Question


1D dct equation implementation
i have written a code to implent 1D dct formula. but the results are not matching with result of inbuilt function 'dct' for the ...

10 years ago | 0 answers | 0

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answers

Question


pixel scrambling of image
I have done image scrambling by exchanging pixels using following method: 1. pn sequence is generated 2.For every bit value ...

10 years ago | 0 answers | 0

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answers

Question


image scrambling in matlab
I have a frame of size 144*176 and i have generated pn sequence of same size. now i want to scramble image by using following me...

10 years ago | 1 answer | 0

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answer

Question


pn sequence generation using independent seed
how to generate pn sequence using independent seed, and for the same seed the same sequence should be generated.i want to use it...

10 years ago | 1 answer | 0

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answer

Question


xor operation using loop
i have 1 dimentional array say p=[1 0 1 0 1 1 1 0 0], now i want to xor its bits like Q(l)= xor(p(i))...... where i=l,l+N,l+...

11 years ago | 1 answer | 0

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Question


dividing image into blocks and access them seperately
I am diving image into 8x8 blocks 1) using loop kk=0; for i=1:(r/bs) for j=1:(c/bs) Block(:,:,kk+j)=...

11 years ago | 2 answers | 0

2

answers

Question


Problem in blockwise zigzag processing of frame
I have two frames and i am dividing each frame into 8x8 blocks now i want to apply zigzag on each 8x8 block of both frames.here ...

11 years ago | 0 answers | 0

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Answered
How to convert video into Frames
you can use mmreader(filemame) function. see matlab documentation on mmreader function.

11 years ago | 0

Question


feedback with carry shift register.I have tried to write fcsr code. can anybody tell whether it is write or I should have to do changes in that.
I have tried to write fcsr code. can anybody tell whether it is write or I should have to do changes in that.also I want help fo...

11 years ago | 0 answers | 0

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answers

Question


Bitwise addition if bit is 1.but not gettin answer.
I am taking one number and converting it into binary and checking each bit whether it is 1 and if it is 1 then is added to next ...

11 years ago | 2 answers | 0

2

answers

Question


image compression using dct,zigzag scan and runlength coding.
hello, I am trying to compress an image by applying dct, zigzag scan and run length coding. but I am stuck at zigzag coding.so ...

11 years ago | 1 answer | 0

1

answer

Question


Can anybody tell me how to apply cover up attack in matlab?
Actually i want to do tamper detection and for that i want to tamper the image by cover up attack.But i am very confused how to ...

11 years ago | 1 answer | 0

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Question


why i am getting error in mmreader function?
when i write the following piece of code i am getting error. clc obj=mmreader('wildlife.wmv') vedio=rea...

11 years ago | 1 answer | 0

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Question


I am trying to implement LSB watermarking in matlab.But i am getting the error=> Assignment has more non-singleton rhs dimensions than non-singleton subscripts Error in ==> watermarked_image(ii,jj)=bitset(watermarked_image,1,watermark(ii,jj));
here is the code=> clc file1='C:\Users\Public\Pictures\Sample Pictures\Chrysanthemum.jpg'; [cover_image,map]=imread(file1);...

11 years ago | 1 answer | 0

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Question


I have 4*4 known matrix.i m converting it into binary and i want to embed text 'abc' into that. i am also converting it into binary.but i am getting error:Undefined function or method 'bitset' for input arguments of type 'char'.
%here is my code..what wrong i am doing? clc; a=[1:4;5:8;9:12;13:16] b=dec2bin(a,8) c=size(b,1) d=size(b,2) text...

11 years ago | 1 answer | 0

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