MATLAB: How to generate some random lines with known width/ diameter value

Question

I want to generate a simulated thick line network like the following image, where the line thickness is known. How can I draw such kind of network with known line width and different orientation? Please help me.

Answer 1

See this demo:

% Demo to burn lines the user draws into an image.  
% Multiple lines may be drawn and they all get burned in.
%----- Initializing steps -----
% Clean up
clc;
clear all;
close all;
workspace; % Display the workspace panel.
fontSize = 20;
hasIPT = license('test', 'image_toolbox');
if ~hasIPT
  % User does not have the toolbox installed.
  message = sprintf('Sorry, but you do not seem to have the Image Processing Toolbox.\nDo you want to try to continue anyway?');
  reply = questdlg(message, 'Toolbox missing', 'Yes', 'No', 'Yes');
  if strcmpi(reply, 'No')
    % User said No, so exit.
    return;
  end
end
% Display images to prepare for the demo.
monochromeImage = imread('pout.tif');
subplot(2, 2, 1);
imshow(monochromeImage);
title('Original Image', 'FontSize', fontSize);
subplot(2, 2, 2);
imshow(monochromeImage);
title('DRAW LINE HERE!!!', 'FontSize', fontSize);
subplot(2, 2, 4);
imshow(monochromeImage);
title('Original Image with lines burned into image', 'FontSize', fontSize);
set(gcf, 'units','normalized','outerposition',[0 0 1 1]); % Maximize figure.
set(gcf,'name','Image Analysis Demo','numbertitle','off') 
%----- Burn line into image -----
burnedImage = monochromeImage;
% Create a binary image for all the lines we will draw.
cumulativeBinaryImage = false(size(burnedImage));
subplot(2, 2, 3);
imshow(monochromeImage);
title('Binary Image', 'FontSize', fontSize);
% Create line mask, h, as an ROI object over the second image in the bottom row.
axis on;
again = true;
lineCount = 0;
while again && lineCount < 20
  promptMessage = sprintf('Draw line #%d in the upper right image,\nor Quit?', lineCount + 1);
  titleBarCaption = 'Continue?';
  button = questdlg(promptMessage, titleBarCaption, 'Draw', 'Quit', 'Draw');
  if strcmpi(button, 'Quit')
    break;
  end
  lineCount = lineCount + 1;
  subplot(2, 2, 2);
  hLine = imline(gca);
  caption = sprintf('DRAW HERE.  Original Image with %d lines in overlay.', lineCount);
  title(caption, 'FontSize', fontSize);
  % Create a binary image ("mask") from the ROI object.
  singleLineBinaryImage = hLine.createMask();
  % Thicken the line by a random amount
  radius = round(20*rand);
  se = strel('disk', radius, 0);
  singleLineBinaryImage = imdilate(singleLineBinaryImage, se);
  % OR it in to the "all lines" binary image mask we're building up.
  cumulativeBinaryImage = cumulativeBinaryImage | singleLineBinaryImage;
  % Display the lines mask.
  subplot(2, 2, 3);
  imshow(cumulativeBinaryImage);
  caption = sprintf('Binary mask of the %d lines', lineCount);
  title(caption, 'FontSize', fontSize);
  
  % Burn line into image by setting it to 255 wherever the mask is true.
  burnedImage(cumulativeBinaryImage) = 255;
  % Display the image with the "burned in" line.
  subplot(2, 2, 4);
  cla;
  imshow(burnedImage);
  caption = sprintf('New image with %d lines burned into image', lineCount);
  title(caption, 'FontSize', fontSize);
end