.
To configure the License plate recognition RR—Search in archive detector, do the following:
By default, the detector is enabled and set to recognize vehicle license plates in the archive.
If necessary, you can change the detector parameters. The list of parameters is given in the table:
| Parameter | Value | Description | |
|---|---|---|---|
| Object features | |||
| Check in lists | Yes | The Check in lists parameter is disabled by default. If you want to use this detector to check in lists of vehicle license plates, select the Yes value (see Checking in lists of LPs) | |
| No | |||
| Record objects tracking | Yes | The metadata of the video stream is recorded to the database by default. To disable the parameter, select the No value | |
| No | |||
| Video stream | Main stream | If the camera supports multistreaming, select the stream for which detection is needed. Selecting a low-quality video stream reduces the load on the server | |
| Second stream | |||
| Other | |||
| Enable | Yes | The detector is enabled by default. To disable the detector, select the No value | |
| No | |||
| Name | License plate recognition RR—Search in archive | Enter the detector name or leave the default name | |
| Decoder mode | Auto | Select a processing resource for decoding video streams. When you select a GPU, a stand-alone graphics card takes priority (when decoding with Nvidia NVDEC chips). If there is no appropriate GPU, the decoding will use the Intel Quick Sync Video technology. Otherwise, CPU resources will be used for decoding | |
| CPU | |||
| GPU | |||
| HuaweiNPU | |||
| Period of ignoring repeated recognitions (sec) (starting with Detector Pack 3.14) | 0 | Specify the period in seconds during which re-recognized license plates are ignored. The value must be in the range [0, 86400] | |
| Type | License plate recognition RR—Search in archive | Name of the detector type (non-editable field) | |
| Advanced settings | |||
| Frame size change | 1920 | The analyzed frames are scaled down to a specified resolution (1920 pixels on the longer side) by default. The value must be in the range [640, 10000]. The following algorithm is used:
| |
| GDPR policy | - | By default, on the layout and in the archive, the characters of a license plate are completely hidden "GDPR ON". To display the characters of a license plate, you must enter a value:
| |
| Minimum LP recognition quality (%) | 80 | Specify the minimum quality of license plate recognition as a percentage. The higher the minimum recognition quality, the fewer false events. The value must be in the range [0, 100] | |
| Track lifespan (starting with Detector Pack 3.14) | Yes | By default, the parameter is disabled. If you want to view the track lifespan for an object in seconds, select the Yes value | |
| No | |||
| Basic settings | |||
| Algorithm for detecting vehicle direction | By LP coordinates | The By LP coordinates algorithm is used by default. It works as follows: if the coordinates of the vehicle license plate shift from top to bottom (the vehicle moves towards the camera) and if the coordinates of the vehicle license plate shift from bottom to top (the vehicle moves away from the camera). Select the By LP scale change parameter if in the Surveillance window, the scale of the vehicle license plate increases (the vehicle moves towards the camera) and if the scale of the vehicle license plate decreases (the vehicle moves away from the camera) | |
| By LP scale change | |||
| Detection mode | CPU | Select a processor for the detector operation (see Selecting Nvidia GPU when configuring detectors).
| |
| Nvidia GPU 0 | |||
| Nvidia GPU 1 | |||
| Nvidia GPU 2 | |||
| Nvidia GPU 3 | |||
| Direction of movement (starting with Detector Pack 3.14) | Both | By default, an event is created when a vehicle moves in Both directions. If you want the event to be created when a vehicle moves from the camera (Outgoing) or to the camera (Incoming), select the corresponding value
| |
| Outgoing | |||
| Incoming | |||
| Country selection | |||
| Country 1 name | Armenia, Argentina, Austria, Azerbaijan, Bulgaria, Brunei, Belarus, Belize (starting with Detector Pack 3.14), Brazil, Belgium, China, Cyprus, Ivory Coast, Czech Republic, Germany, Colombia, Denmark, Estonia, Egypt, Finland, France, Georgia, Greece, Croatia, Hungary, Indonesia, Ireland, Italy, Kyrgyzstan, Kazakhstan, Lithuania, Luxembourg, Latvia, Malta, Malaysia, Mexico, Moldova, Myanmar, Netherlands, | In the corresponding fields, select from the list one or more countries whose license plates you want to recognize | |
| Country 2 name | |||
| Country 3 name | |||
| Country 4 name | |||
| Country 5 name | |||
| Country βeta (starting with Detector Pack 3.14) | Select one or more countries. The parameter is currently in beta | ||
In the window, specify the area in which license plate detection and recognition is performed. To do this, click in the preview window and select Detection area (polyline). You can adjust the area by moving the anchor points .
|
To save the parameters of the detector, click the Apply 
button. To cancel the changes, click the Cancel 
button.
Configuration of the License plate recognition RR—Search in archive detector is complete. If necessary, you can create and configure the necessary sub-detectors on the basis of License plate recognition RR—Search in archive (see Standard sub-detectors).
