[Support]: Setting threshold using 2 decimal numbers make frigate ignoring it

[peppe-terra]

Checklist

• I have updated to the latest available Frigate version.
• I have cleared the cache of my browser.
• I have tried a different browser to see if it is related to my browser.
• I have tried reproducing the issue in incognito mode to rule out problems with any third party extensions or plugins I have installed.

Describe the problem you are having

I'm using a model built with Frigate+.

I try to set a decimal value for threshold using a value with two decimal number (0.85), but I get true positives under the default threshold value, which is 70% (e.g. 56%).

If I set a value with one decimal number (0.8) the threshold work as expcected.

Steps to reproduce

1. Use a model built with Frigate+.
2. Set a threshold value with two decimal numbers (e.g. 0.85)
3. Wait for object revelation for the type you setted the threshold for.
   ...

Version

0.14.1-f4f3cfa

In which browser(s) are you experiencing the issue with?

No response

Frigate config file

auth:
  enabled: true

mqtt:
  host: 192.168.1.29
  user: hidden
  password: hidden

snapshots:
  enabled: true

detectors:
  ov:
    type: openvino
    device: GPU

model:
  path: plus://9e9082428a404f6917af731cbfdc2b3a

ffmpeg:
  hwaccel_args: preset-vaapi

cameras:

  SantaMarina: # <--- this will be changed to your actual camera later
    enabled: true

    ffmpeg:
      inputs:
        - path: 
            rtsp://admin:[email protected]:554/cam/realmonitor?channel=1&subtype=0&unicast=true&proto=Onvif
          roles:
            - detect

      output_args:
        record: preset-record-generic-audio-aac

    onvif:
      host: 192.168.1.105
      port: 80
      user: admin
      password: pass

    objects:
      filters:
        person:
          threshold: .75
          mask: 0.349,0.427,0.413,0.421,0.401,0.213,0.345,0.218
          min_area: 6000
        cow:
          min_area: 7000
        car:
          threshold: 0.85    
    motion:
      mask: 0.873,0.041,0.875,0.119,0.974,0.112,0.974,0.046

  Ingresso:
    enabled: true
    ffmpeg:
      inputs:
        - path: 
            rtsp://admin:[email protected]:554/cam/realmonitor?channel=1&subtype=0&unicast=true&proto=Onvif
          roles:
            - detect

      output_args:
        record: preset-record-generic-audio-aac

    onvif:
      host: 192.168.1.104
      port: 80
      user: admin
      password: pass

    objects:
      filters:
        car:
          threshold: 0.85
          mask: 0,0.45,0.429,0.395,0.618,0.988,0,1  
        sheep:
          min_area: 6000
        person:
          mask: 0.031,0.689,0.074,0.553,0.135,0.678,0.113,0.847
    motion:
      mask:
        - 0.875,0.056,0.96,0.056,0.961,0.094,0.878,0.096
        - 0.48,0,0.476,0.4,0.787,0.748,0.932,0.007
      threshold: 30
      contour_area: 10
      improve_contrast: 'true'
 
objects:
  track:
    - person
    - car
    - dog
    - sheep
    - cow
    - cat
    - goat

go2rtc:
  streams:
    SantaMarina: # <- for RTSP streams
      - rtsp://admin:[email protected]:554/cam/realmonitor?channel=1&subtype=0&unicast=true&proto=Onvif # <- stream which supports video & aac audio
  # <- copy of the stream which transcodes audio to the missing codec (usually will be opus)   
    Ingresso:
      - rtsp://admin:[email protected]:554/cam/realmonitor?channel=1&subtype=0&unicast=true&proto=Onvif
  
record:
  enabled: true
  retain:
    days: 3
    mode: motion
  events:
    retain:
      default: 3
      mode: motion
version: 0.14

docker-compose file or Docker CLI command

version: "3.9"
services:
  frigate:
    container_name: frigate
    restart: unless-stopped
    image: ghcr.io/blakeblackshear/frigate:0.14.1 
    shm_size: "256mb"
    volumes:
      - ./config:/config
      - ./storage:/media/frigate
      - ./letsencrypt/live/host.mydomain.net:/etc/letsencrypt/live/frigate:ro
      - type: tmpfs # Optional: 1GB of memory, reduces SSD/SD Card wear
        target: /tmp/cache
        tmpfs:
          size: 1000000000
    ports:
      - "5000:5000"
      - "8554:8554" # RTSP feeds
      - "8555:8555/tcp" # WebRTC over tcp
      - "8555:8555/udp" # WebRTC over udp
      - "8971:8971"
    devices:
      - /dev/dri/renderD128
    extra_hosts:
      - "host.docker.internal:host-gateway"
    privileged: true
    secrets:
      - PLUS_API_KEY
    environment:
      - SECRET_FILE=/run/secrets/my_secret

secrets:
  PLUS_API_KEY:
    file: ./apiKey

Relevant Frigate log output

No relevant output

Relevant go2rtc log output

No relevant output

Operating system

Other Linux

Install method

Docker Compose

Network connection

Wired

Camera make and model

Imou

Screenshots of the Frigate UI's System metrics pages

Any other information that may be helpful

No response

[NickM-27]

This is not a bug, I use similar filters and they have worked correctly. We will need to see visual examples to help suggest what you are seeing specifically

[peppe-terra]

Is this good?

[NickM-27]

This is a single detection (snapshot), which can be selected for a score below the threshold. That is not what the threshold is used for. I would suggest reading the docs https://docs.frigate.video/configuration/object_filters#object-scores

[peppe-terra]

Another...

[NickM-27]

The new Explore view in 0.15 makes this scoring difference more clear

[peppe-terra]

Ok. I undesrtand. I already red this doc https://docs.frigate.video/configuration/object_filters#object-scores.
For me was not clear that snapshots are selected under the threshold value too.
Are snaphosts selected using min_score value as the lower value to be selected?

[NickM-27]

snapshots are selected by a number of criteria including score, object size, etc.

Given that you are using frigate+ you might want to add face and license_plate to the objects track list, because in this case the license plate will be used to choose the best snapshot for a car, and same for face <-> person.