See3CAM_CU51
Application User Manual
06-August-2015
www.e-consystems.com
| Subject to change without notice
Page 15 of 21
6.4.1.2 Exposure control
The exposure control for See3CAM_CU51 is provided in the extension menu. The required
exposure value can be entered into the text box and this exposure value will be applied for both
preview and still image.
See3CAM_CU51 supports exposure levels ranging from 1 milli second to 30 seconds. This can
be input through the exposure set text box, i.e. for 1 milli second the value of 1 should be entered
in the text box, for 1 second the value of 1000 should be set, as 1 second = 1000 milli seconds.
Similarly for 30 seconds the value of 30000 should be set, as 30 seconds = 30000 milli seconds.
Note: For higher exposure values there will be a drop in the frame rate, which is the expected
behavior of the camera. For 1second exposure time new frame will be updated on screen for
every 1 second and for 30seconds exposure time new frame will be updated on screen for every
30 seconds.
6.4.1.3 Master mode
The Master Mode of operation can be considered as a free-running mode of the camera. The
camera is configured for a preview resolution and still resolution. The application is started and
the Master mode is chosen and the application starts streaming the video. This is a simple mode
of operation for the camera without any external trigger capability.
In the Master mode, the camera is configured for the specific preview resolution and frame rate.
The exposure for the still image capture can be controlled through extension unit menu, and will
be applied when the image is captured.
The still image pin can be configured for the required still capture resolution. The still image
capture can be done in two methods as described below:
Software Still Capture
Hardware Still Capture
When the user initiates the still capture operation, the still image is captured and stored. In the
Software Still Capture operation, the user is initiating the still capture operation from the
e-CAMView application.
In the Hardware Still Capture mode, the user can send a hardware trigger pulse to the TRIGGER
pin of the camera’s DIN connector. This trigger pulse could have been generated by pressing a
hardware switch connected to this TRIGGER pin. The camera controller recognizes this
TRIGGER command and then instructs the camera sensor to capture a still and this still image is
sent to the PC. This Hardware Still Capture operation can be more like a hardware switch that
initiates a Capture operation when pressed by the user.
In Master mode still image can be taken by using any of the methods, and also in both the
resolutions using any exposure or brightness value.
6.4.2 Trigger mode
In Trigger mode, See3CAM_CU51 camera is capable of synchronizing the exposure (or
integration) of the pixels of the camera to an external trigger pulse that can be given through the
DIN connector of the camera. Also the duration of the exposure depends on the pulse duration of
the trigger pulse. Since this is a global shutter camera, all the pixels start and stop integrating at
the same time, avoiding rolling skew during the capture of fast moving scenes. In addition to this,
the start of integration of pixels can be synchronized to an external event in Trigger mode.
