Dahua N41C1P User Manual page 217

Figure 5-163 Video quality analytics settings
The value range of threshold is 0–100, and the default value is 30. When the value
exceeds the set threshold, an alarm will be triggered.
Table 5-46 Video quality analytics parameters
Parameter
Stripe
Noise
Color Cast
Defocus
Overexpose
Step 5 Click OK.
Step 6 Click Setting next to Schedule to configure the arming period.
The system triggers corresponding alarm actions only during the arming period.
Description
Stripes refer to the striped interferences in the video which might
be due to device aging or signal interference. The stripe might be
horizontal, vertical, or oblique.
Video noise refers to the distortion of optical system or the
degradation of image quality caused by hardware equipment
during transmission.
An image in the video is generally a colorful image that contains
color information, such as RGB. When these three components
appear at some unusual scale in an image, the image is biased.
An image with high resolution contains more details, but image
blur is a common problem of image quality decrease which is
caused by many factors in the process of image acquisition,
transmission and processing, and is defined as virtual focus in
video diagnosis.
The brightness of the image refers to the intensity of the image
pixels. Black is the darkest and white is the brightest. Black is
represented by 0 and white is represented by 255. When the
brightness value exceeds the threshold, the image is over
exposed.
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