Mobile detection, translated as&quota; Motion detection technology"， Also known as motion detection, it is commonly used for unmanned surveillance recording and automatic alarm. The images captured by the camera at different frame rates will be calculated and compared by the CPU according to a certain algorithm. When there is a change in the image, such as someone walking by and the lens being moved, the calculated comparison result will exceed the threshold and indicate that the system can automatically make corresponding processing. In short, when a person is moving, the machine will detect and push messages and alarm prompts to the user's app.

Taking the Jinding Weishi light bulb camera and the same device as a certain house as an example, let's talk about the differences between the two machines in motion detection and tracking, so that everyone can choose a more suitable home camera.

Mobile detection comparison

Two devices are tested in the same environment at the same time. Every minute, the tester simulates pedestrian passing and triggers detection. If the message push is successful or there is an alarm, the tester records it once. Each gear is triggered 5 times. Device default enable function: only mobile detection.

We can see that in the same gear and distance environment, a certain viewing device is triggered at 11:01 and only triggers again after a 12 minute interval. After triggering detection at 11:01, Jinding Weishi equipment maintains a triggering frequency of approximately 1 minute intervals thereafter.

In the 8-meter distance test, a certain surveillance device no longer triggered detection until 11.41 approached the device. Jinding Weishi equipment is still stable in triggering detection.

Product comparison conclusion: The effective detection distance of a certain viewing device is about 5 meters, and the false alarm rate is relatively high. It is difficult to trigger the detection of smaller moving objects or objects with smaller movement amplitude. There is no significant difference in sensitivity between low, medium, and high gears of its equipment. During the testing process, there were situations that were difficult to trigger and the detection effect was unstable. The effective detection distance of Jinding Weishi equipment is about 8 meters, with high accuracy. Some objects with small body size or movement range can basically trigger motion detection. In the second set of tests, we changed the default enabled functions to: motion detection, humanoid algorithm, and presented the following screen:

In 5 testing tasks at a low gear of 1 meter, a certain watcher device had already missed a trigger event at 14:17. All Jinding devices are stably triggered.

14: At 28-14:32, during the five testing tasks of detecting human figures at a 1-meter high gear, the detection alarm of a certain viewing device has been missed three times, namely 14:29, 14:30, and 14:32. The Jinding Weishi device is still stably triggered.

At the same time, when the character first appears on the screen, Jinding Weishi equipment can immediately make a judgment and remind the user. The equipment of a certain watchman is slower.

15: At 46-15:50, during the testing task at a high gear of 5m, the humanoid detection alarm of a certain viewing device has been missed three times. The time periods are 15:46, 15:49, and 15:50 respectively. 15：51 -16：14，  In the distance tests of 6m and 7m, the humanoid detection of a certain viewing device is almost not triggered in the low, medium, and high gears, and only the middle gear is triggered once during the 6m and 7m tests. The Jinding device is still stably triggered.

Mobile tracking comparison

Mobile tracking is the process of cameras tracking people as they move. Two devices, Jinding Vision and a certain watcher, are tested simultaneously in the same environment, with an interval of 1 meter. The tester simulates pedestrians passing by and triggers tracking until the device cannot detect and track them. The test is divided into three levels: low, medium, and high, in order to test the mobile tracking sensitivity of a certain Kanjia and Jinding Weishi device. During detection, the default feature is enabled: only mobile detection.

Comparison conclusion: The effective distance for tracking low gear movement of a certain viewing device is about 5 meters. The effective distance for tracking movement in the middle and high gears is about 6 meters, and movement tracking is ineffective at a distance of about 8 meters. The effective distance for tracking the movement of Jinding Weishi equipment in low, medium, and high gears is all 15 meters, and there is no actual difference in the final effect among the three gears.

In the second experiment, we changed the default activation function to enable movement tracking and humanoid effects. The test results are as follows:

Comparative conclusion:

After activating the humanoid effect on a certain viewing device, the effective distance for tracking low, medium, and high gear movements is around 4 meters. There may be no tracking within a range of 5-6 meters.

After activating the humanoid effect on the Jinding Weishi device, the effective distance for low gear movement tracking is about 6 meters; The effective distance for tracking middle gear movement is about 13 meters, and the effective distance for high gear is about 15 meters.