Guidance for high-altitude parabolic engineering survey and commissioning
The high-altitude parabolic function is mainly realizedDetection of high-altitude falling targets and their trajectory information, an alarm is generated when an object falls from top to bottom in the specified detection area, and its fall trajectory is drawn.
Device Model:IPC-P244 and IPC-P248 series
Recommended Scenarios:
The scene is open, unobstructed, no strong light, backlight, etc., and the picture quality is clean; Avoid objects occluding, such as leaves, flags and other shaking bodies, as well as pillars, billboards, etc., if there are a small number of objects occluding, you can add shielding areas to avoid; Try to face the building scene as much as possible; Scenario example:
Restricted Scenes:
Camera shake or movement, affecting target detection; Abnormal weather such as windy days, rain and snow days affect the detection of targets; In scenarios with severe occlusion, there are few effective detection areas, and even adding shielding areas will affect target detection. If the distance is too far and the target is too small, there is less information that can be obtained, which affects the detection of the target. If the angle is too tilted, the acquisition of target information will be affected. Example of a restricted scenario:
*The inner installation angle is for reference only, please start from the actual site for specific angle installation.
Draw according to the effective area of the building, and the edge part of the building is included in the area as much as possible; The lower edge of the area should be as close as possible to the lower edge of the building in the camera frame (the lower edge of the camera screen may not be included when there are areas where people and vehicles move such as the ground or entrances and exits); Make sure that the vertical distance of the object is more than 150-225 pixels (8MP) in the area; Sensitivity: 50 is recommended, if you pay more attention to the detection rate, you can appropriately increase the sensitivity, but it will increase the false detection rate, if you pay more attention to the false detection rate, you can appropriately adjust the sensitivity, but it will also reduce the detection rate; Confidence: 50 is recommended, the higher the confidence, the fewer false positives. If false positives are encountered, they can be moderately increased; If it is not detected, it can be moderately reduced; Enable Trajectory Overlay: The trajectory of the object's motion can be marked on the image; 
Example:
When there are objects such as leaves and flags in the screen, a shielding area is added to filter the interference targets.
Example: