### Object detection

In this section, we will learn how we can use the function regionprops in MATLAB to detect various properties of objects that can be detected using steps in the previous sections. The input to the regionprops function is a binary image, with the object marked in white and the background marked in black.

This command creates a 'struct' variable in which it stores various properties for every region. The default properties are Area, Centroid, BoundingBox. The function also allows extracting a wide range of other properties that can be found in the MATLAB help or by typing in doc regionprops in the MATLAB command window.

Here's the syntax for using the function regionprops.

% Code to extract default properties of objects
Stats = regionprops(out2);

% Code to extract only centroids of objects
Stats = regionprops(out2, 'Centroid');