how to count pixels

i just want to count how many number of pixels in the selected(manually) portion of the image...can anyone help me with matlab code

[Michael Haderlein]

Please specify your question. How do you select manually? Do you give min and max of x and y? Then it's (max_x-min_x+1)*(max_y-min_y+1). Guess that's not the solution, so please give details.

[James Tursa]

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer