How can I link the color of an image to a defined temperature?

1 次查看（过去 30 天）
Enne
Enne 2021-4-28
回答： Sanju 2024-2-29
I'm working on this image as following:
RGB = imread('Flame1.jpg');
[X,map] = rgb2ind(RGB,3);
imagesc(X)
cmap = colormap(map);
colormap('hsv')
axis off
axis image
c = colorbar;
c.Limits = [-4 4];
c.Ticks = [-4 1 4];
c.TickLabels = {'800\circ C','900\circ C','1000\circ C'};
In this way on the colorbar to each temperature (800 °C, 900 °C and 1000 °C) it will correspond red, green and blue respectively as it's showed in the colormap. However, what I did is a manual assignement since I customize the colorbar manually. I was wondering if there is a way to link the colors of the colorbar and the colormap to the temperature.
If not, is there a better way to link the colors to the assigned temperature?
  6 个评论
显示 4更早的评论
Enne
Enne 2021-5-19
Thank you @Adam Danz, I tried to run this code with the examples given by the user itself but apparently it doesn't work

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Sanju
Sanju 2024-2-29
Hi Enne,
I understand that you want to link the colour of an image automatically to a defined temperature,
Currently there is no built-in functionality in MATLAB that directly links the colors of the colorbar and the colormap to the temperature values. The manual assignment you have done is a common approach in such cases.
However, if you have a specific temperature-to-color mapping that you would like to achieve, you can create a custom colormap using the colormap function. By defining a colormap that smoothly transitions between colors, you can visually represent the temperature values with corresponding colors.
To create a custom colormap you may refer to the following code:
% Define the temperature values and their corresponding colors
temperature = [-4, 1, 4];
colors = [1 0 0; 0 1 0; 0 0 1]; % Red, Green, Blue
% Create a custom colormap
custom_cmap = interp1(temperature, colors, linspace(-4, 4, 256));
% Apply the custom colormap
colormap(custom_cmap);
%Add your code here
....
You can also refer to the following link for more information,
https://www.mathworks.com/help/matlab/ref/colormap.html
Hope this helps!

类别

在 Help Center 和 File Exchange 中查找有关 Red 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by