lab color space is (0-100),(-128-127),(-128-127), given an image under lab color space, how to show it suitably (imshow is not appropriate)?
MATLAB: How to show lab space image
color lab spaceimage processingImage Processing Toolboximshow
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The missing lines are just being subsampled away when you go to display. They're still in the image, just use the magnifying glass to zoom in and you'll see them.
How about this:
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 = 20;image1 = imread('image1.jpg');% 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(image1);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.
image1 = rgb2gray(image1); % 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% This image is supposed to be binary.
image1 = image1 > 128;imshow(image1);hp = impixelinfo();% Display the image.
subplot(2, 2, 1);imshow(image1, []);axis on;hold on;title('Image1', 'FontSize', fontSize, 'Interpreter', 'None');drawnow;hold onimage2 = imread('image2.jpg');% Display the image.subplot(2, 2, 2);imshow(image2, []);hp = impixelinfo();axis on;hold on;title('Image2', 'FontSize', fontSize, 'Interpreter', 'None');drawnow;h3 = subplot(2, 2, 3:4);% Mask the image using bsxfun() function
% maskedRgbImage = bsxfun(@times, image2, cast(image1, 'like', image2));
imshow(image1, []);hp = impixelinfo();hold on;h=imshow(image2);set(h,'Alphadata', 0.6);axis on;theColorMap = jet(256);theColorMap(1,:) = 0; % First row is black.
theColorMap(end,:) = 1; % last row is white.
colormap(h3, theColorMap);colorbar(h3);caxis([0,0.6]);title('Image1 with Image2 in overlay', 'FontSize', fontSize, 'Interpreter', 'None');% Set up figure properties:
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0, 0.05, 1, .95]);% 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')
It's probably a floating point image. Cast to uint8 and then try it
uint8Image = uint8(255 * mat2gray(yourImage));imwrite(uint8Image, filename);
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