Create real colorbar pictures

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Lev Mihailov
Lev Mihailov on 15 Jun 2022
Edited: KSSV on 15 Jun 2022
There is a picture and I would like to create a real color bar, where yellow will be the maximum and white the minimum.
clc; close all ; clear all
[fileName1,path,indx] = uigetfile('*.png');
fileName=fullfile(path,fileName1);
fileName
I=imread(fileName)
imshow(I)
thanks in advance

Answers (1)

KSSV
KSSV on 15 Jun 2022
Edited: KSSV on 15 Jun 2022
You can make your colormap using the RGB color code values. Check the below example.
y = [255 255 0]/255 ; % yello RGB value
w = [255 255 255]/255 ; % white RGB value
n = 10 ; % number of variations, can be changed
cmap = [linspace(w(1),y(1),n)' linspace(w(2),y(2),n)' linspace(w(3),y(3),n)'] ;
% USe colormap
Z = peaks(100) ;
surf(Z)
shading interp
colormap(cmap)
colorbar

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