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Tutorial 21
EN Camera
Series
3.2 Image Transfer
3.2.1 FTP Image Transfer
To transfer images via FTP, first make sure to set up the FTP server properly. Please check the
following items:
The username/password or anonymous login must be set for FTP server.
Set the permission of the read/write/create directory.
First, type the IP address of the FTP server (destination IP). If you have a second FTP server, enter
that IP address as well. If the EN camera detects that the first FTP server is down, then it will
automatically send images to the second FTP server.
Enter the User name and Password that the FTP server gives permission to.
Type image type (TIF or JPEG). “Image1 Data” is an image triggered by the first TTL trigger,
Ethernet trigger, or RS-485 serial trigger. If the second FPGA trigger is set (Config Address=28), then
the FPGA automatically generates the second hardware trigger predefined delay after the first
hardware TTL trigger. “Image 2 Data” defines image type of the second triggered image. Normally,
you should ignore the “Image 2 Data.”
“Subdirectories” is normally set to 1000. The EN creates subdirectories under a single Destination
DIR. When the number of files in the subdirectory reaches 1000, then the EN automatically creates
another subdirectory. Naming conventions of the subdirectory can be found in the LC-to-EN
interface document.
“Destination DIR” is a name of the directory where all “Subdirectories” are located.
Please refer to Troubleshooting “Problem 9: FTP servers switch between primary server and second
server, even if the hard disk is not full.” on page 42.
3.3 ADR (Automatic Dynamic Range) Control
3.3.1 Light Sensor Connection
ADR control is a process that runs inside the EN camera. It controls the camera every 1/10 second to
ensure that when the camera is triggered, it produces a high quality image of the license plate and
the vehicle it is mounted on, in all ambient lighting conditions. The ADR also decides when to turn
on/off auxiliary lighting as required to maintain proper plate illumination at night and during
dawn/dusk transitions. ADR uses an external light sensor to provide the information required to