Draw Austria flag using Matlab

Prerequisite: RGB image representation
A colored image can be represented as a 3 order matrix. The first order is for the rows, the second order is for the columns and the third order is for specifying the color of the corresponding pixel. Here we use the RGB color format, so the third order will take 3 values of Red, Green ans Blue respectively. The values of the rows and columns depending on the size of the image.


  • Make a 3 order zero matrix of dimensions 300 X 600 X 3. 300 denotes the number of pixels for rows, 500 denotes number of pixels for columns and 3 denotes the color coding in RGB format.
  • Paint the complete image in red. RGB code for red is (255, 0, 0)
  • Make the horizontal white bar. RGB code for white is (255, 255, 255).

Below is the implementation:





I = zeros(300, 600, 3);
% here image is of class ‘uint8’, the range of values
% that each colour component can have is [0 – 255]
I = uint8(I);
%painting the whole image red
I(:, :, 1) = 255;
%white bar 
I(101:200, :, 1:3) = 255; 
% show the image formed



Attention reader! Don’t stop learning now. Get hold of all the important CS Theory concepts for SDE interviews with the CS Theory Course at a student-friendly price and become industry ready.

My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.