User`s guide

x Contents

Working with Acquired Image Data

Image Acquisition Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Bringing Image Data into the MATLAB Workspace . . . . . . . 7-3

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

Moving Multiple Frames into the Workspace . . . . . . . . . . . . 7-4

Viewing Frames in the Memory Buffer . . . . . . . . . . . . . . . . . 7-6

Bringing a Single Frame into the Workspace . . . . . . . . . . . 7-10

Working with Image Data in MATLAB Workspace . . . . . . . 7-11

Understanding Image Data . . . . . . . . . . . . . . . . . . . . . . . . . 7-11

Determining the Dimensions of Image Data . . . . . . . . . . . . 7-12

Determining the Data Type of Image Frames . . . . . . . . . . . 7-15

Specifying the Color Space . . . . . . . . . . . . . . . . . . . . . . . . . 7-16

Viewing Acquired Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-22

Retrieving Timing Information . . . . . . . . . . . . . . . . . . . . . . . 7-23

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-23

Determining When a Trigger Executed . . . . . . . . . . . . . . . . 7-23

Determining When a Frame Was Acquired . . . . . . . . . . . . . 7-24

Determining the Frame Delay Duration . . . . . . . . . . . . . . . 7-25

Using Events and Callbacks

Using Events and Callbacks . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

Using the Default Callback Function . . . . . . . . . . . . . . . . . . . 8-3

Event Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

Retrieving Event Information . . . . . . . . . . . . . . . . . . . . . . . . . 8-8

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8

Event Structures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8

Accessing Data in the Event Log . . . . . . . . . . . . . . . . . . . . . 8-10