Image Processing Toolbox

Object-Based Operations

In a binary image, an object is any set of connected pixels with the value 1. (meaning that they are "on"). For example, this matrix represents a binary image containing a single object, a 3-by-3 square. The rest of the image is background.

0     0     0     0     0     0
0     0     0     0     0     0
0     1     1     1     0     0
0     1     1     1     0     0
0     1     1     1     0     0
0     0     0     0     0     0

This section discusses the types of neighborhoods used for object-based operations, and describes how to use toolbox functions to perform:

• Perimeter determination
• Binary flood fill
• Connected-components labeling
• Object selection

Related Operations

4- and 8-Connected Neighborhoods