Question

downsampling an image without changing image content
Hi, I want to down-sample an image and produce 2 images from it like stereo. suppose I have an image with size 1000X1000 and I w...

8 years ago | 1 answer | 0

Question

how can i calculate psnr of special blocks of image
Hi, I have a 512x512 image and I want to calculate PSNR of part of image for example ROI region of it?for ROI region I have 12 b...

9 years ago | 0 answers | 0

Question

normalize corrolation between two images?
Hi, I want to calculate this formula in matlab. how can I do it? 1/(M×N) ∑∑W'(i,j)× W(i,j) which range of i an j is from...

9 years ago | 0 answers | 0

Question

finding block with minimum mean in cell array?
Hi, I have a problem with finding blocks with minimum mean in cell array. I have a cell array like salientMask_B128x1...

9 years ago | 1 answer | 0

Question

how can i produce svd inverse?
Hi,I want to use SVD function in matlab and make some changes on S matrix of svd then I want to reproduce the first matrix. how ...

9 years ago | 1 answer | 0

Question

perform function for neural network
Hi, I have a question about perform function in matlab. I do not know that this function shows error rate or accuracy rate for ...

9 years ago | 1 answer | 0

Question

classification images using knn
hi, I have some questions about knn. I have 2 different class of dogs and cats and I want to classify new images based on their ...

9 years ago | 1 answer | 0

Question

mnist classification using batch method
Hi. I want to train a neural network with mnist database using batch method. I use below code but my accuracy is very low. but I...

9 years ago | 1 answer | 0

Question

why i use trainlm function i get out of memory error?
hi I want to use neural network toolbox for training mnist and when i use trainlm with 50000 training data i get out of memory e...

9 years ago | 1 answer | 0

Question

why I get "out of memory" error when i use zeros(60000)?
Hi. when I use zeros(60000) I receive out of memory error.My matlab product is MATLAB R2014a 64 bit. can you help me please?

9 years ago | 2 answers | 0

Question

median edge detection predictor
Hi I need code for MED(or GAP) predictor for loss less compression please help me if you have any code for this? thanks in adv...

10 years ago | 0 answers | 0

Question

how can i build binary image in matlab?
Hi I want to produce an ieee logo with size 32x32 and 16x16 and use it for watermark how can i do it?is there any easy way in ma...

10 years ago | 2 answers | 0

Question

how do i obtain impulse response
hi I have some problems for calculating impulse response. I have a vector u(t)=[1,1,1,1,1,-1,-1,-1,-1,-1,-1]; and ...

10 years ago | 0 answers | 0

Question

watermark embedding in wavelet domain
Hi, I have some questions about wavelet; I want to embed a watermark in wavelet coefficient but i do not know which coefficients...

10 years ago | 0 answers | 0

Question

how can i load function in my code
hi i write a code and i have another code but i want to recall this code in other code for example i have l.m and a.m and i wan...

10 years ago | 0 answers | 0

Question

how save produced images in loop
hi i have a loop and produce blocks 32*32 with zeros now i want to save them in special folder how can i do it?

10 years ago | 1 answer | 0

Question

how can i find dense regions in an image
hi i have a question about sparse and dense region in image. i want to find regions in image which have texture and are dense be...

10 years ago | 1 answer | 0

Question

correlation between 2 matrix
hi i have 2 matrices and i want to calculate the correlation between 2 matrices how can i do it. also these matrices are 0-1 an...

10 years ago | 1 answer | 0

Question

divide an image to blocks
hi i have an 256*256 image and i want to divide it to 8*8 blocks without overlapping and then calculate DCT for each blocks. how...

10 years ago | 1 answer | 0

Question

what is image level
hi i have some questions about image 's levels i should insert a watermark in 0 ,3 and 7 level of an image and calculate robustn...

10 years ago | 1 answer | 0