Dalsa Falcon 4-CLHS Series User Manual

Falcon™ 4-CLHS Series Operational Reference  75
Using Cycling Presets—a Simple Example
As presented in this category’s overview, the cycling preset features allow setting up camera
configurations that can change dynamically and repeatedly, with minimum overhead. The features
that change along with the trigger for the feature change are preprogrammed in the camera.
Additionally, a set of preset features can be updated while the camera is acquiring with a different
preset. Such dynamic feature changes allow applications to perform tracking algorithms.
The following example describes a simple cycling sequence (using free running acquisitions) with
exposure change steps that will repeat until stopped by the user. This example uses the Sapera
CamExpert tool to set features and test the sequence.
Multi-Exposure Cycling Example Setup
In the Camera Control category, set the following features as follows:
 Acquisition Frame Rate: 4.0
 Exposure Time: 1000 µs (somewhat short).
In the Cycling Preset category, set the following features as follows:
 Cycling Preset Mode: Active. This feature enables the Cycling Preset Module.
 Cycling Preset Count: 4. This represents the number of presets which will be configured and
used.
 Cycling Preset Incremental Source: Start Of Frame. This event will be used to increment the
cycling presets index, and is a logical choice in a free-running acquisition setup.
 Cycling Preset Repeater: 4. This represents the number of incremental source events to count
before switching to the next preset. In this example we are counting Start Of Frame events,
thus a value of 4 (with a test setup of 4 fps) will switch preset every 1 second.
 (Optional) Cycling Preset Reset Source: Acquisition End. This feature defines the event that will
reset the preset index back to 1. In this example, setting the feature to Acquisition End returns
the cycling preset index to the start (1) when the Acquisition Stop feature is clicked in
CamExpert to stop the acquisition.
 Features Activation Selector: Exposure Time.
 Features Activation Mode: Active. The Exposure Time field now controls the camera exposure
time. The primary exposure time field in the Camera Control Category is now indicating a read
only field.
 Cycling Preset Selector: 1.
 Exposure Time: leave as is. The feature shows the last exposure time used by the camera
(before cycling was enabled, namely 1000 µs).
 Cycling Preset Selector: 2.
 Exposure Time: higher value than the previous setting. This will increase acquisition brightness.
 Repeat for Cycling Preset Selector 3 and 4, each with a longer exposure.
Test the Example
 With 4 different exposure times saved in four presets, click the CamExpert Grab button to start
the cycling free-running acquisition.
 The CamExpert live display window will show a live grab of 4 fps, where each second shows a
step increase in exposure, which then returns to the first exposure after 4 seconds, cycling
continuously until stopped by the user.

Dalsa Falcon 4-CLHS Series Specifications

General

Brand	Dalsa
Model	Falcon 4-CLHS Series
Category	Digital Camera
Language	English