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# Elysi Cochin

314 total contributions since 2012

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edge detection(YCbCr transformation) what should i do??
edge function works on 2D images only so if you want to find edge from ycbcr image, take the y-channel u = edge(YCBCR(:,:,1),...

10 Tage ago | 0

Question

get all image files from nested folder
how to get all image files in such a directory ( folders inside folders )

14 Tage ago | 1 answer | 0

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Question

delete empty cells from cell array
how to delete the empty cells and get back 4x4 matrix i tried out = ca(~cellfun('isempty', ca)); but i'm getting output ...

15 Tage ago | 1 answer | 0

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Question

How to create a white rotated box inside a black box
How to create a white rotated box inside a black box as shown in image

22 Tage ago | 1 answer | 0

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Question

find a vector in a cell array
AP = {[1,2,14];[1,5,14]} P = {[1,5,14]}; i wanted to check if P is in AP i did as IsInAp = find(cellfun(@(x) ismember(path,x...

24 Tage ago | 1 answer | 0

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Question

select rows satisfying a particular condition
having a matrix of dim 5 x 10 if i give start_index = 1, and end_index = 3, i wanted to get rows starting with value of start...

26 Tage ago | 2 answers | 0

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Question

how to find all possible path between 2 nodes
knowing the connectivity between nodes, how can i find the possible path between 2 nodes?

27 Tage ago | 2 answers | 0

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how to select neighbouring 5 pixels of an image
I wanted to take one pixel from an image say im(x,y) then take the neighbouring 5 pixels of position im(x,y) find the maximum ...

27 Tage ago | 1 answer | 0

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Question

size of video file and audio file
how to find size of video file and audio filesize of video file and audio file? i saw for audio file we can use siz = wavread...

28 Tage ago | 1 answer | 0

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Question

find the shortest path
i have 2 set of coordinates S1-S25 (set 1) and D1-D10 (set2) i have connection between coordinates my start points are from se...

etwa ein Monat ago | 3 answers | 0

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Question

draw multiple lines based on coordinates
P1 P2 P2 P1,P3 P3 P2 i have 3 points P1, P2, P3 the connection between points is given above. How to draw lines based on th...

etwa ein Monat ago | 1 answer | 0

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Question

create a cell array with incrementing values
how to create a cell with values like a1 a2 a3 a4 a5 ........ a25 i need to get the above values into a row cell array and col...

etwa 2 Monate ago | 1 answer | 0

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Question

concatenate values from matrix and cell array
i have a matrix and a cell array mtric = 1 2 3 4 5 6 7 8 9 cell_array = aa bb cc dd ee ff gg hh ii i wanted to combi...

etwa 2 Monate ago | 2 answers | 0

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Question

split a rectangular matrix
i have a matrix as input = [1 0 0 0; 0 1 0 0; 0 0 1 0]; how can i split a the input matrix as output1 = [1 0 0 0; 0 0 0 0; 0 ...

etwa 2 Monate ago | 1 answer | 0

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Question

create custom filter to image
create custom filter using mean and covariance

etwa 2 Monate ago | 1 answer | 0

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Question

shortest path between 2 set of coordinates
I have 2 set of coordinates --> set_1 and destination If i select a cordinate in set_1 and destination (eg: from set_1 [10.5, 4...

etwa 2 Monate ago | 1 answer | 0

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Question

plot coordinates in the center of grid
xy = [ 11.2871990000000 75.8008150000000 11.2826320000000 75.8033060000000 11.2648170000000 75.8115220000000 11.287192000000...

etwa 2 Monate ago | 1 answer | 0

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Question

how to get back numerical value
V = [-0.00153846153846154; 0; -0.000769230769230769; -0.0126923076923077; 0.00384615384615385]; M = dec2bin(typecast(double(V),...

etwa 2 Monate ago | 1 answer | 0

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Question

get common position in cell array and replace with specific values
idx = [ 3 6 7 ] ; ids = [ 2 3 5 6 7 ] ; i have a cell of size 1 x 8 Initially all values in cell_array of size 1 x 8 is...

2 Monate ago | 1 answer | 0

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Question

split a diagonal matrix
v = [2 1 4]; D = diag(v) Having a diagonal matrix, i wanted to split the diagonal matrix as below M1 = [ 2 0 0 ...

2 Monate ago | 2 answers | 0

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Question

retrieve binary data back
I have a binary data as 00 10 11 01 10 11 11 01 I need to replace this data as if 00 = 0 01 = 1 10 or 11 = * if i get a ...

2 Monate ago | 3 answers | 0

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Question

create a new matrix from a vector
create a new matrix from v = [1 1 1 2 2 2 3 3 4]; u=unique(v); R=arrayfun(@(x)v==u(x),1:numel(u),'un',0); M=+vertcat(R{:}) ...

2 Monate ago | 1 answer | 0

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Question

create vector based on string data
cell_array = { 'FA.EA'; 'FA.EB'; 'FA.EC'; 'FA.EA'; 'FA.EB'; 'FB.EC'; 'FB.EA'; 'FB.EB'; 'FC.EC'; 'FC.ED'; 'FC.EA'; 'F...

2 Monate ago | 2 answers | 0

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Question

hide numerical values in image
how to hide a matrix into an image and retrieve it. i used the lsb code from the link https://in.mathworks.com/matlabcentral/...

3 Monate ago | 1 answer | 0

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Question

how to hide 2 images as same size of cover image
i have 3 gray images g1, g2 and g3 of size 512 x 512. I wanted to hide g2 and g2 in g1 to get watermarked image w1 using any m...

3 Monate ago | 1 answer | 0

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PCA in Matlab reduce dimensionality
[coeff, score] = pca(ingr); requiredResult = score(:,1:2); or if you want to change coeff to 13 x 2 matrix, you'll have to us...

3 Monate ago | 0

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How to train ann with multiple input data
% Create a network (i have used feed-forward backpropagation) net = newff(TrainFeatures, Trainlabels, num_of_hidden_Neurons); ...

3 Monate ago | 0

| accepted

Question

what does the L-shaped bracket mean?
N1 = N2 = 4 xi = ith pixel of 4 x 4 block What does the 'L - shaped bracket' mean? How to write code for alpha and beta?

3 Monate ago | 2 answers | 0

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Question

get grayImage from bitImage
% Compute mean in 4-by-4 blocks kernel = ones(4); meanImage = conv2(double(grayImage), kernel, 'same') / numel(kernel); % Com...

3 Monate ago | 1 answer | 0

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Question

convert image to bitmap map image without using for loop
Partition an image into 4 × 4 pixel blocks and compute average for the block N1 = N2 = 4 xi = ith pixel now replace the...

3 Monate ago | 1 answer | 0