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Question
1d Convolution using Matlab's conv() function
According to the documentation(https://www.mathworks.com/help/matlab/ref/conv.html), len(output) = len(input) + len(kern...
6 years ago | 2 answers | 0
2
answersQuestion
Can anyone explain this output of 1d conv() function?
>> u = [1 2 3]; >> v = [1 2 3]; >> w = conv(u, v) w = 1 4 10 12 9 >> Can anyone explain this output? ...
6 years ago | 1 answer | 0
1
answerQuestion
Why is this Gaussian function has nonconformant arguments error?
function m=gaussian(med, var, n) if ( mod(n, 2)==0 ) n=n+1; end; med=double(med); var=double(var); m...
6 years ago | 0 answers | 0
0
answersQuestion
2D convolution in in Matlab.
I = imread ("lena.jpg"); %imshow(I); K = I; C = conv2(I, K); imshow(C); I am expecting something like the follo...
6 years ago | 2 answers | 0
2
answersQuestion
Explanation of source code written in Matlab
What does the following function accomplish? Can anyone tell me what the following code is doing and how is it doing that? ...
7 years ago | 1 answer | 0
1
answerQuestion
How do I know when to use loops and when to use vectorization?
In *<https://www.mathworks.com/matlabcentral/answers/359415-how-can-i-convert-matrix-to-cell-array-of-strings this question>*, t...
7 years ago | 1 answer | 0
1
answerQuestion
How can I convert matrix to cell array of strings?
I want to convert the following: mat = [1 2 3; 4 5 6 ; 7 8 9]; into the following array of strings, arr = {'1,2(3)', ...
7 years ago | 2 answers | 0
2
answersQuestion
What does the following code do?
If we have, [row_num, col_num] = size(img); What does the following code do? function length_vec = compute_angular_l...
7 years ago | 1 answer | 0
1
answerQuestion
Is this the proper way of using ListBox?
I am learning Matlab GUI programming. I have written the following basic program to test ListBox GUI control. The following p...
7 years ago | 1 answer | 0
1
answerQuestion
what is repmat() doing in the following code?
function handles = Open_Image(hObject, eventdata, handles, type, axesIm) % if the file-name and path-name are not epty....
7 years ago | 1 answer | 0
1
answerQuestion
hslider=findobj('Tag', 'xText') returns 0x0 empty GraphicsPlaceholder array.
>> SliderTool >> hslider=findobj('Tag', 'xText') hslider = 0x0 empty GraphicsPlaceholder array. >> Why is t...
7 years ago | 2 answers | 0
2
answersQuestion
Undefined operator '*' for input arguments of type 'matlab.ui.control.UIControl'.
The following function is giving an error, function tf = GUI_ListBoxAdd(vH, bUni, vStr, vID); % Add an entry to a GUI li...
7 years ago | 1 answer | 0
1
answerQuestion
How can I eliminate as many loops as possible from the following code?
The following source code uses 4 loops at a time. My program is deadly slow. *How can I eliminate as many loops as possible ...
7 years ago | 1 answer | 0
1
answerQuestion
How can I vectorize the following code?
*main.m* I = imread('bear.png'); J = rgb2gray(imread('marked_bear.png')); mask = I-J; for r=1:size(I,1) ...
7 years ago | 1 answer | 0
1
answerQuestion
Showing multiple images in one window in Matlab
Why doesn't the following code show the images? clear all; image_name = 'woman.png'; I = gray_imread(image_nam...
7 years ago | 1 answer | 0
1
answerQuestion
How can I reduce the space between images?
The following source code has three problems: # it can't show only one image. # it doesn't preserve the original aspect rati...
7 years ago | 1 answer | 0
1
answerQuestion
Drawing a white line on an image using (rho, theta).
I want to draw a line on the following image using |(| |rho| |,| |theta| |)| of the detected line using the Hough transformation...
7 years ago | 1 answer | 0
1
answerQuestion
Finding the angle of inclination from two end points of a line.
<</matlabcentral/answers/uploaded_files/80859/Scratch1.png>> point1 = [22, 114]; point2 = [693, 233]; x1 = point1(1); ...
7 years ago | 1 answer | 1
1
answerQuestion
Hough Transform source code explanation
I couldn't understand the following code's *|for|* loop. What is the purpose of the for loop here? Why is *|for|* iterati...
7 years ago | 1 answer | 0
1
answerQuestion
Why is empty string test failing?
<</matlabcentral/answers/uploaded_files/75690/Untitled.png>> . This GUI's source code is giving me error message: func...
7 years ago | 1 answer | 0
1
answerQuestion
Image processing code explanation.
lambda = 4;%8 theta = 0; psi = [0 pi/2]; gamma = 0.5; bw = 1; N = 12; ...
8 years ago | 1 answer | 0
1
answerQuestion
Edge detection error message
Why isn't the following code working? >> str=sprintf('Scratch1.jpg'); >> img_ORG = imread(str); >> fsc = edge(img_OR...
8 years ago | 1 answer | 0
1
answerQuestion
Image enhancement MATLAB code.
% Adjust image intensity values or colormap. f = imadjust(uint8(scratched_image), stretchlim(scratched_image), [0 1]); ...
8 years ago | 1 answer | 0
1
answerQuestion
Convolution of a color image to itself.
'Untitled.png' is a color image of 48x48 size. >> i = imread('Untitled.png'); >> v = i(:); >> c = conv2(v, v); War...
8 years ago | 1 answer | 0
1
answerQuestion
Why is the colormap not working as expected?
In the following program *|cellImage|* and *|spineImage|*, both are being displayed in *|jet|*. One of them should be gray an...
8 years ago | 1 answer | 0
1
answerQuestion
Error using besselj. NU and Z must be the same size or one must be a scalar.
What is wrong with the following program? Z = (0:0.2:9)'; NU = 0:5; y = besselj(NU, Z); % Bessel function plo...
8 years ago | 1 answer | 0
1
answerQuestion
Optimization is generating error plotting pareto front
The following code is generating the following error, >> main Optimization terminated: average change in the spread of P...
8 years ago | 1 answer | 0
1
answerQuestion
Multi objective optimization of a 2D function.
I need to optimize the following function, <</matlabcentral/answers/uploaded_files/67093/Untitled.png>> . I have writte...
8 years ago | 1 answer | 0
1
answerQuestion
Finding Pareto Front of Shaffer's 2nd function.
I couldn't understand what was wrong with the following code of mine, *|main.m|* x = -5:0.1:5; y = schaffer2(x); ...
8 years ago | 2 answers | 0
2
answersQuestion
Objective function vs fitness function.
What is the difference between an Objective Function and a Fitness Function? Are Objective Functions only used in Linear Prog...
8 years ago | 2 answers | 0