Mahmoud Hassan asked . 2023-02-04

how to know if image is rgb?

i want to set an if condition to know if the image i am reading is rgb image or not

image processing , medical image processing , rgb

Expert Answer

Kshitij Singh answered . 2025-03-28 23:56:56

To check if an image is an RGB image in MATLAB, you can examine the dimensions of the image matrix. An RGB image will typically have three dimensions: height, width, and three color channels (red, green, and blue).

Here's a simple way to check if an image is RGB:

Load the image into MATLAB.
Examine the size of the image matrix.

Here's an example:

matlab

% Load the image
img = imread('your_image_file.jpg');

% Get the size of the image
[height, width, numChannels] = size(img);

% Check if the image is RGB
if numChannels == 3
    disp('The image is RGB.');
else
    disp('The image is not RGB.');
end

In this example, numChannels will be 3 for an RGB image. If it's not 3, the image might be grayscale or have a different color representation.

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