How do I remove a white background and only keep
How do I remove a white background and only keep certain objects in a binary image on MATLAB?
I would like the remove the white pixels in the background, but somehow keep the white lines. How would I go about doing that.
Sorry I didn’t mean to remove the question. I was trying to comment on my phone, but I must have unknowingly modified the question.
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are you still there? Perhaps you’re still struggling over this so I made a complete and fancy demo for you. Here it is:
clc; % Clear the command window.
close all; % Close all figures (except those of imtool.)
clear; % Erase all existing variables. Or clearvars if you want.
workspace; % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 25;%===============================================================================
% Get the name of the image the user wants to use.
baseFileName = 'concrete_inverted.png';
% Get the full filename, with path prepended.
folder = []; % Determine where demo folder is (works with all versions).
fullFileName = fullfile(folder, baseFileName);%===============================================================================
% Read in a demo image.
grayImage = imread(fullFileName);
% Get the dimensions of the image.
% numberOfColorChannels should be = 1 for a gray scale image, and 3 for an RGB color image.
[rows, columns, numberOfColorChannels] = size(grayImage)
if numberOfColorChannels > 1
% It's not really gray scale like we expected - it's color.
% Use weighted sum of ALL channels to create a gray scale image.
grayImage = rgb2gray(grayImage);
% ALTERNATE METHOD: Convert it to gray scale by taking only the green channel,
% which in a typical snapshot will be the least noisy channel.
% grayImage = grayImage(:, :, 2); % Take green channel.
end
% Display the image.
subplot(2, 2, 1);
imshow(grayImage, []);
axis on;
axis image;
caption = sprintf('Original Gray Scale Image');
title(caption, 'FontSize', fontSize, 'Interpreter', 'None');
drawnow;
hp = impixelinfo();% Set up figure properties:
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);
% Get rid of tool bar and pulldown menus that are along top of figure.
% set(gcf, 'Toolbar', 'none', 'Menu', 'none');
% Give a name to the title bar.
set(gcf, 'Name', 'Demo by ImageAnalyst', 'NumberTitle', 'Off')
drawnow;% Binarize the image by thresholding.
mask = grayImage > 128;
% For some reason, the top two lines of his image are all white. Blacken those 2 lines:
mask(1:2, :) = false;
% Display the mask image.
SEE COMPLETE ANSWER CLICK THE LINK
