choosing locations in an image to take pixels

Hello,

If I take an image and I want to do an average of the pixels across the entire image, how do I do that? Right now when I do imshow(image) then it gives me locations where I click on the image. I just want to do the entire image.

Thanks

Answer 1

[Image Analyst]

meanGrayLevel = mean(grayImage(:)); % Take mean of entire image.

[Image Analyst]

Or

meanGrayLevel = mean2(grayImage); % Take mean of entire image.

[Rick]

what if the image is not gray? I take the image as RGB, then convert it to HSV, then take the HSV average.

This is what I have

RGB = imread(image);
hsv_image = rgb2hsv(RGB);
imshow(hsv_image);
pixel_values = impixel(hsv_image);
AverageHSV = mean(pixel_values);

When I do this command a figure appears with the image, and I have to manually click on points. I just want the entire image to automatically be averaged instead of the points that I click. I would like it to be a 1 by 3 array with average H, average S, and average V over the whole image.

[Image Analyst]

meanh = mean2(hsv_image(:,:,1));
means = mean2(hsv_image(:,:,2));
meanv = mean2(hsv_image(:,:,3));