I want to ask how can i compare intensity values of images with its database? and name them as high intensity and low intensity ? please help me out :)

.problem i am facing that how can i compare the intensity of images? and name them as high intensity or low intensity

Answer 1

[Image Analyst]

% Read in the image.
grayImage = imread(yourFileName);
[rows. columns, numberOfColorChannels] = size(grayImage)
if numberOfColorChannels > 1
  % It's color so convert to grayscale (luminance).
  grayImage = rgb2gray(grayImage);
end
% Get it's mean with mean2().
meanValue = mean2(grayImage);
% Compare the image's mean with your definition of what is high or low.
if meanValue < 142 % or whatever...
  classification = 'Low Intensity';
else
  classification = 'High Intensity';
end

[maria ahmed]

Thanks...:)) it help me out..sir, but i want to compare it wi th data base of images ? so for this this what should i do in this code more?

[Image Analyst]

Yes of course. You'll have to analyze all your images that you want to be in the database and find their means and store them in the database. Then "compare" a test image to each of the others in the database. You can use save() to create a simple database. You can compare in whatever way you'd like, for example by subtracting the means.