Download Image Object Counter app from the page and install the app.
This app is capable of identifying the objects on image, together of measuring their characterics.
Click the app icon to start this app by opening a dialog. Then load an image as source image (If the active window is image window, this active image is used as the source image for analysis.), and then insert operations by using the menu. You can also save or load the operations to or from a file. And after getting the target objects on image, you can output the measurement results of these objects.