Question

how i can make a part of image black

I would like to crop an image that is, make a small block of an encrypted image black. How can i do that?

2 years ago | 1 answer | 0

Question

How to scramble an image?

I need to scramble an image and want to get back the orginal image. So i used the below code im = imread('cameraman.tif'); ...

2 years ago | 1 answer | 0

Question

How to multiply every pixels?

I need to find the product of every all the pixel values in a matrix. That is, if an image of size 256×256×3 is taken... i need ...

2 years ago | 1 answer | 0

Question

How to shuffle an image diagonally?

I need to shuffle an image of size 256x256x3 along diagonally. That is the pixel value of upper left corner must come at the low...

2 years ago | 2 answers | 0

Question

Is it an integer value?

1.7008e+05. IS this value considers as an integer in matlab.I found such values and when performing bitxor operation there occur...

2 years ago | 2 answers | 0

Question

How to check whether all the elements are integer?

I had a vector of size (1 x 65536). How can i check whether all the elements in that vector is an integer.

2 years ago | 1 answer | 0

Question

"Error using bitxor Double inputs must have integer values in the range of ASSUMEDTYPE.

While running my code there occurs an error like "Error using bitxor Double inputs must have integer values in the range of ASSU...

2 years ago | 1 answer | 0

Question

Binary string must be 52 bits or less error?

I had some values in RRbin of size 65536 x 36 and type double.Then i xor-ed them with sybin(65536 x 36 double) The result of xor...

2 years ago | 1 answer | 0

Question

How to solve the error "In an assignment A(I) = B, the number of elements in B and I must be the same."

for i = 1:65535 RR(i+1)=mod((double(R(i))+GG(i)+BB(i)),256); GG(i+1)=mod((RR(i)+double(G(i))+B...

2 years ago | 0 answers | 0

Question

Why i didnt get the image back during decryption using this inverse code ?

I used the below code for image scrambling and unscrambling. But i didnt get the exact image in unscrambling. In the decrypted i...

2 years ago | 1 answer | 0

Question

saving the output image

Ineed to save my output image using a filename in one folder? How is it possible?

2 years ago | 1 answer | 0

Question

How to divide an image into 8x8 blocks?

I had an image of size 256*256 which is in ycbcr color space.I need to divide that input image into 8x8 blocks and need to apply...

2 years ago | 2 answers | 0

Question

XOR operation of double values?

I have a chaotic sequence of 65536 values in sy and the binary equivalent is stored in sybin as type double. Sybin has 65536 bin...

2 years ago | 1 answer | 0