Enable Vehicle and Vehicle Attribute Recognition

FindFace Server allows you to recognize a single vehicle and its attributes.

The vehicle attributes are as follows:

license plate number (for selected countries),

Note

Currently, the following countries are supported:

Europe: Russia, Lithuania, Latvia, Estonia, Finland, Czech Republic, Serbia, Belarus, Ukraine, Moldova, Georgia, Azerbaijan, Armenia.

Asia: the UAE, Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, Uzbekistan, Saudi Arabia, Vietnam, India, Pakistan, Thailand.

North America: Mexico.

South America: Argentina, Brazil.
color,
make,
model,
body style,
vehicle category,
vehicle orientation (front, rear, or side),
special vehicle type (taxi, route transport, carsharing, ambulance, police, rescue service, gas service, military, road service, other special),
vehicle weight and body size.

Note

Special vehicle recognition as well as vehicle weight and body size recognition work for selected countries only and may not work for your country. For more information please contact your manager or our support team (support@ntechlab.com).

This section describes how to enable vehicle and vehicle attribute recognition.

To enable recognition of vehicles and their attributes, do the following:

Specify neural network models for vehicle recognition and vehicle attribute recognition in the /opt/ffserver/configs/extraction-api.yaml configuration file.

Important

Be sure to choose the right acceleration type for each model, matching the acceleration type of extraction-api: CPU or GPU. Be aware that extraction-api on CPU can work only with CPU-models, while extraction-api on GPU supports both CPU- and GPU-models.

Open the extraction-api.yaml configuration file.

sudo vi /opt/ffserver/configs/extraction-api.yaml

Specify the vehicle detector model in the detectors -> models section by pasting the following code:

GPU

detectors:
  ...
  models:
    ...
    gustav:
      aliases:
      - car
      - efreitor
      model: detector/cardet.kali.008.gpu.fnk
      options:
        min_object_size: 32
        resolutions:
        - 2048x2048
  ...

CPU

detectors:
  ...
  models:
    ...
    gustav:
      aliases:
      - car
      - efreitor
      model: detector/cardet.kali.008.cpu.fnk
      options:
        min_object_size: 32
        resolutions:
        - 2048x2048
  ...

Make sure that the objects -> car section contains the quality_attribute: car_quality and the base_normalizer: facenorm/cropbbox.v2.gpu.fnk or the base_normalizer: facenorm/cropbbox.v2.cpu.fnk, depending on your acceleration type:

GPU

objects:
  ...
  car:
    base_normalizer: facenorm/cropbbox.v2.gpu.fnk
    quality_attribute: car_quality
  ...

CPU

objects:
  ...
  car:
    base_normalizer: facenorm/cropbbox.v2.cpu.fnk
    quality_attribute: car_quality
  ...

Specify the normalizers required for the extractors. If you need license plate recognition, specify the carlicplate normalizer. For other extractors, specify the cropbbox normalizer.

Normalizer	Normalizer model	Used for extractors
carlicplate	`carnorm/carnorm.briacon.v2.gpu.fnk` `carnorm/carnorm.briacon.v2.cpu.fnk`	`car_license_plate`
cropbbox	`facenorm/cropbbox.v2.gpu.fnk` `facenorm/cropbbox.v2.cpu.fnk`	`car_license_plate_quality`, `car_description`, `car_quality`, `car_special_types11`, `car_categories`, `car_orientation`, `car_weight_types7`

GPU

normalizers:
  ...
  models:
    ...
    carlicplate:
      model: carnorm/carnorm.briacon.v2.gpu.fnk
    ...
    cropbbox:
      model: facenorm/cropbbox.v2.gpu.fnk
    ...

CPU

normalizers:
  ...
  models:
    ...
    carlicplate:
      model: carnorm/carnorm.briacon.v2.cpu.fnk
    ...
    cropbbox:
      model: facenorm/cropbbox.v2.cpu.fnk
    ...

Specify the extraction models in the extractors -> models section, subject to the extractors you want to enable:

GPU

extractors:
   ...
   models:
     car_categories:
       default:
         model: carattr/carattr.categories.v1.gpu.fnk
     car_description:
       default:
         model: carattr/carattr.description.v1.gpu.fnk
     car_emben:
       default:
         model: carrec/bottas.gpu.fnk
     car_license_plate:
       default:
         model: carattr/carattr.license_plate.v9.gpu.fnk
     car_license_plate_quality:
       default:
         model: carattr/carattr.license_plate_quality.v3.gpu.fnk
     car_orientation:
       default:
         model: carattr/carattr.orientation.v0.gpu.fnk
     car_quality:
       default:
         model: carattr/carattr.quality.v1.gpu.fnk
     car_special_types11:
       default:
         model: carattr/carattr.special_types11.v1.gpu.fnk
     car_weight_types7:
       default:
         model: carattr/carattr.weight_types7.v0.gpu.fnk
   ...

CPU

extractors:
   ...
   models:
     car_categories:
       default:
         model: carattr/carattr.categories.v1.cpu.fnk
     car_description:
       default:
         model: carattr/carattr.description.v1.cpu.fnk
     car_emben:
       default:
         model: carrec/bottas.cpu.fnk
     car_license_plate:
       default:
         model: carattr/carattr.license_plate.v9.cpu.fnk
     car_license_plate_quality:
       default:
         model: carattr/carattr.license_plate_quality.v3.cpu.fnk
     car_orientation:
       default:
         model: carattr/carattr.orientation.v0.cpu.fnk
     car_quality:
       default:
         model: carattr/carattr.quality.v1.cpu.fnk
     car_special_types11:
       default:
         model: carattr/carattr.special_types11.v1.cpu.fnk
     car_weight_types7:
       default:
         model: carattr/carattr.weight_types7.v0.cpu.fnk
   ...

The most used extraction models are the following:

Extractor	Configure as follows
vehicle feature vector	`car_emben: carrec/bottas.cpu.fnk`
vehicle feature vector	`car_emben: carrec/bottas.gpu.fnk`
license plate number	`car_license_plate: carattr/carattr.license_plate.v9.cpu.fnk` `car_license_plate_quality: carattr/carattr.license_plate_quality.v3.cpu.fnk`
license plate number	`car_license_plate: carattr/carattr.license_plate.v9.gpu.fnk` `car_license_plate_quality: carattr/carattr.license_plate_quality.v3.gpu.fnk`
set of attributes: make / color / model / body style	`car_description: carattr/carattr.description.v1.cpu.fnk`
set of attributes: make / color / model / body style	`car_description: carattr/carattr.description.v1.gpu.fnk`
vehicle image quality	`car_quality: carattr/carattr.quality.v1.cpu.fnk`
vehicle image quality	`car_quality: carattr/carattr.quality.v1.gpu.fnk`
special vehicle	`car_special_types11: carattr/carattr.special_types11.v1.cpu.fnk`
special vehicle	`car_special_types11: carattr/carattr.special_types11.v1.gpu.fnk`
vehicle category	`car_categories: carattr/carattr.categories.v1.cpu.fnk`
vehicle category	`car_categories: carattr/carattr.categories.v1.gpu.fnk`
vehicle weight and body size	`car_weight_types7: carattr/carattr.weight_types7.v0.cpu.fnk`
vehicle weight and body size	`car_weight_types7: carattr/carattr.weight_types7.v0.gpu.fnk`
vehicle orientation	`car_orientation: carattr/carattr.orientation.v0.cpu.fnk`
vehicle orientation	`car_orientation: carattr/carattr.orientation.v0.gpu.fnk`

Modify the /opt/ffserver/configs/video-worker.yaml configuration file.

In the models section, specify the vehicle detector, normalizer, and extractor models as shown in the example below:

GPU

sudo vi /opt/ffserver/configs/video-worker.yaml

models:
  ...
  detectors:
    ...
    car:
      fnk_path: /usr/share/findface-data/models/detector/cardet.kali.008.gpu.fnk
      min_size: 60
    ...
  normalizers:
    ...
    car_norm:
      fnk_path: /usr/share/findface-data/models/facenorm/cropbbox.v2.gpu.fnk
    car_norm_quality:
      fnk_path: /usr/share/findface-data/models/facenorm/cropbbox.v2.gpu.fnk
    ...
  extractors:
    ...
    car_quality:
      fnk_path: /usr/share/findface-data/models/carattr/carattr.quality.v1.gpu.fnk
      normalizer: car_norm_quality

CPU

sudo vi /opt/ffserver/configs/video-worker.yaml

models:
  ...
  detectors:
    ...
    car:
      fnk_path: /usr/share/findface-data/models/detector/cardet.kali.008.cpu.fnk
      min_size: 60
    ...
  normalizers:
    ...
    car_norm:
      fnk_path: /usr/share/findface-data/models/facenorm/cropbbox.v2.cpu.fnk
    car_norm_quality:
      fnk_path: /usr/share/findface-data/models/facenorm/cropbbox.v2.cpu.fnk
    ...
  extractors:
    ...
    car_quality:
      fnk_path: /usr/share/findface-data/models/carattr/carattr.quality.v1.cpu.fnk
      normalizer: car_norm_quality

Make sure that the objects -> car section is included:

objects:
  ...
  car:
    normalizer: car_norm
    quality: car_quality
    track_features: ''

Open the /opt/ffserver/configs/video-manager.yaml configuration file and make sure it contains the car section in detectors that looks similar to the example below. Note that the filter_min_quality parameter is set to 0.65 by default. You can increase it to get more accurate results from cameras and other video sources. The best practice is to set this value to 0.73.

sudo vi /opt/ffserver/configs/video-manager.yaml

detectors:
  ...
  car:
    filter_min_quality: 0.65
    filter_min_size: 100
    filter_max_size: 8192
    roi: ''
    fullframe_crop_rot: false
    fullframe_use_png: false
    jpeg_quality: 95
    overall_only: true
    realtime_post_first_immediately: false
    realtime_post_interval: 1
    realtime_post_every_interval: false
    track_interpolate_bboxes: true
    track_miss_interval: 1
    track_overlap_threshold: 0.25
    track_max_duration_frames: 0
    track_send_history: false
    post_best_track_frame: true
    post_best_track_normalize: true
    post_first_track_frame: false
    post_last_track_frame: false
    tracker_type: simple_iou
    track_deep_sort_matching_threshold: 0.65
    track_deep_sort_filter_unconfirmed_tracks: true
    track_object_is_principal: false
    track_history_active_track_miss_interval: 0