Create real colorbar pictures

Question

Lev Mihailov 2022-6-15

编辑： KSSV 2022-6-15

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

Answer 1

KSSV 2022-6-15

编辑：KSSV 2022-6-15

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