The principle behind the pseudo color transformation is to map the intensity value in the image to the result of three distinct transformations—RED, BLUE, and GREEN—on a grayscale or intensity image. Now we can see an example of this procedure using Matlab.
Example 1:
% READ A IMAGE INSTALLED
X = imread('GeeksForGeeks.tif');
%PREFACE A MATRIX
Output = zeros([size(X,1) size(X,2) 3]);
%Characterize a colormap
map = colormap(jet(256));
%Assign 1-D RED, GREEN, and BLUE to the columns.
Red = map(:,1);
Green = map(:,2);
Blue= map(:,3);
%MAP THE COLORS IN RELATION TO THE IMAGE'S INTENSITY
Output(:,:,1) = Red(X);
Output(:,:,2) = Green(X);
Output(:,:,3) = Blue(X);
Output = im2uint8(Output);
% SHOW THE IMAGES
imshow(Output);
Save the image as either a PNG or a JPEG.
imwrite(Output,'pseudo_color.jpg');
Output:
