There are two parameters in the motion detection settings: Threshold and Percentage. Pixel difference between two continuous images are calculated and compared to the parameter value "threshold." If the difference is larger than the threshold, this pixel is marked as "alerted". The processes will be done for all pixels in the motion detection window.

A higher sensitivity will detect slow movement more easily while a low sensitivity will only detect fast movement.

If the percentage of the "alerted" pixels is larger than the parameter value "percentage," the window will be indicated as motion occurred. A low percentage will detect objects that are smaller relative to the window size and a high percentage will only detect objects that are larger relative to the window size.

In the example, the pixels that are different from the first image and the second image are found (highlighted boxes). Each of these pixels is compared with their corresponding pixel in the other image and if the difference between the two pixels is greater than the chosen threshold, which in this case is 30%, the pixel is marked as "alerted." If more than the chosen percentage of pixels are "alerted," or in this case 30%, motion detection will be triggered. (Sen and Per.bmp)

Before use the FTP or email to get the snapshot, you have to add the motion windows.

1. Go to Motion Detection page and add a motion window. Remember to check the "Enable motion detection" item.
2. Go to the Application page; check the schedule for when you want to send snapshots, and choose Motion trigger and send snapshots by email.

Different models has different interface of the Application page, you have to check the Application page.

First, make sure the "Enable motion detection" item is enabled on the motion diction page. Second, please check there is no mask in the motion detection windows.