41 total contributions since 2016

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...

nästan 2 år ago | 2 answers | 0

Question

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? ...

nästan 2 år ago | 1 answer | 0

Question

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...

ungefär 2 år ago | 0 answers | 0

Question

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...

ungefär 2 år ago | 2 answers | 0

Question

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? ...

nästan 3 år ago | 1 answer | 0

Question

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...

nästan 3 år ago | 1 answer | 0

Question

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)', ...

nästan 3 år ago | 2 answers | 0

Question

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...

nästan 3 år ago | 1 answer | 0

Question

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...

nästan 3 år ago | 1 answer | 0

Question

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....

nästan 3 år ago | 1 answer | 0

Question

hslider=findobj('Tag', 'xText') returns 0x0 empty GraphicsPlaceholder array.

>> SliderTool >> hslider=findobj('Tag', 'xText') hslider = 0x0 empty GraphicsPlaceholder array. >> Why is t...

nästan 3 år ago | 2 answers | 0

Question

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...

nästan 3 år ago | 1 answer | 0

Question

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 ...

ungefär 3 år ago | 1 answer | 0

Question

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) ...

ungefär 3 år ago | 1 answer | 0

Question

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...

ungefär 3 år ago | 1 answer | 0

Question

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...

ungefär 3 år ago | 1 answer | 0

Question

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...

ungefär 3 år ago | 1 answer | 0

Question

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); ...

ungefär 3 år ago | 1 answer | 0

Question

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...

mer än 3 år ago | 1 answer | 0

Question

Why is empty string test failing?

<</matlabcentral/answers/uploaded_files/75690/Untitled.png>> . This GUI's source code is giving me error message: func...

mer än 3 år ago | 1 answer | 0

Question

Image processing code explanation.

lambda = 4;%8 theta = 0; psi = [0 pi/2]; gamma = 0.5; bw = 1; N = 12; ...

mer än 3 år ago | 1 answer | 0

Question

Edge detection error message

Why isn't the following code working? >> str=sprintf('Scratch1.jpg'); >> img_ORG = imread(str); >> fsc = edge(img_OR...

mer än 3 år ago | 1 answer | 0

Question

Image enhancement MATLAB code.

% Adjust image intensity values or colormap. f = imadjust(uint8(scratched_image), stretchlim(scratched_image), [0 1]); ...

mer än 3 år ago | 2 answers | 0

Question

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...

mer än 3 år ago | 1 answer | 0

Question

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...

mer än 3 år ago | 1 answer | 0

Question

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...

mer än 3 år ago | 1 answer | 0

Question

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...

mer än 3 år ago | 1 answer | 0

Question

Multi objective optimization of a 2D function.

I need to optimize the following function, <</matlabcentral/answers/uploaded_files/67093/Untitled.png>> . I have writte...

mer än 3 år ago | 1 answer | 0

Question

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); ...

mer än 3 år ago | 2 answers | 0

Question

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...

mer än 3 år ago | 2 answers | 0