Creating a pseudo-color image from a grayscale image
조회 수: 28 (최근 30일)
이전 댓글 표시
How would I create a pseudo-color image from a grayscale image? I need to use the attached formulas to map the intensity to three color channels R, G, B. Then, I need to merge the channels to get the pseudocolor image.
I am very lost so any help would be appreciated!
댓글 수: 0
채택된 답변
yanqi liu
2021년 9월 26일
sir, may be you can ref the follow code
clc; clear all; close all;
im = imread('cameraman.tif');
x = double(im);
c1 = 0.5; c2 = 0.8; c3 = 0.3; c4 = 0.6;
rx = x .* (1 + c1*sin(pi*x./255) + c2*(1-cos(2*pi*x./255)));
gx = x .* (1 + c3*sin(pi*x./255) + c4*(1-cos(2*pi*x./255)));
bx = 3*x - rx - gx;
rgb = mat2gray(cat(3, rx, gx, bx));
figure; imshow(rgb)
댓글 수: 0
추가 답변 (2개)
Sulaymon Eshkabilov
2021년 9월 25일
(1) Embed these three equations for variable x and c1, c2, c3, c4 values
(2) Concatenate R, G, B that becomes the pseudocolor image.
댓글 수: 1
Walter Roberson
2021년 9월 25일
In particular,
RGB = cat(3, R, G, B);
Depending on the range of values of R, G, B, and the data type, you might need to normalize the matrix.
Image Analyst
2021년 9월 25일
R = .....
G = .....
B = .....
cmap = [R(:), G(:), B(:)]
coloredImage = ind2rgb(grayImage, cmap);
댓글 수: 0
참고 항목
카테고리
Help Center 및 File Exchange에서 Image Processing Toolbox에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!