how to get average rgb pixel and hue saturation value?

i want to compare between 2 images and make an analysis for 2 picture using rgb and hsv

Answer 1

[Image Analyst]

See my color demos in my File Exchange There are several demos where I get the values of RGB and HSV in several places. Basically you just index into an array or else use impixel().

[saiful]

for each pixel i use same methods that you use. but, what about average rgb value for whole picture. can i use impixel() to get average rgb value?

[saiful]

is it ok if i use mean(reshape(YourImage, [], 3)) to get the average rgb ?

[Image Analyst]

What would be the point of that? You can get each channel and get the mean of the whole channel one at a time:

% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);

% Get means
redMean = mean2(redChannel);
greenMean = mean2(greenChannel);
blueMean = mean2(blueChannel);

[student1275]

Hello Image Analyst!

I'm just wondering what units the redMean, greenMean and blueMean would be in?

[Image Analyst]

Gray levels.

[Tasneem Al-Tmimi]

Am wondering if finding the mean values of RGB channels helps in finding what is the color of an object using MATLAB ??

[Image Analyst]

Yes, especially if the object takes up the whole image.