Recommendations on characteristics for choosing the cameras:
- Resolution 2~5 MP.
- Matrix size not less than 1/2.8".
- Possibility of shutter speed control (at least, values 1/2 ~ 1/1000 are required). Moving objects have to be clearly visible.
- The less distortion of the lens and of the picture - the better. The detection quality on distorted areas are worse.
- The more light sensitive will be the matrix - the better.
- RWDR 120 dB (camera hardware WDR), better 140 dB.
- Onvif-compliance (at least S).
Recommendations on camera settings:
- GOP level has to be equal to the detection frequency (Detector settings in Trassir VMS) or more frequent.
- Camera bitrate has to be sufficient for required resolution, fps an motion intensity. The camera picture has to be stable, without noise and glitches.
- Codec has to be H.264.
- Set correct aspect ratio.
- Disable OSD text on camera if possible.
- Disable camera software picture enhancements. Consider using only RWDR if WDR is required.
Factors other than camera characteristics and settings, affecting the Wear Detector performance:
- Highly not recommended to use outdoors since the lighting conditions are not constant.
- Highly not recommended to use on multicolor, black, white and blue uniforms.
- The lighting in the scene of detection. The lighting in the scene has to be sufficient and evenly distributed. The worse will be these parameters - the worse will be the color recognition.
- The positioning of the camera. Ideal vertical angle is 45 degrees, Permissible deviation is +-20 degrees.
Examples of good angles and image quality:
