This section lists the settings found in the Camera Motion detection tab, in the Video task.
In the Motion detection tab, you can define multiple motion detection configurations for your camera. Each configuration is based on a different schedule.
- Motion detection
- Turns motion detection ON or OFF for the time periods covered by the schedule.
- Detection is done on
- Specifies whether motion detection is performed on the Archiver (always available), or on the video unit (not all units support this feature).
- Controls how much difference must be detected in a block between two consecutive frames before it is highlighted as a motion block. With the sensitivity set to the maximum (100%), the slightest variation in an image block is detected as motion. Lowering the sensitivity reduces the number of motion blocks detected in the video. You can decrease the sensitivity when your equipment is prone to generate noise.
- Auto calibrate
- Automatically set the sensitivity to determine what constitutes positive motion.
- Consecutive frame hits
- A frame where the number of motion blocks reaches the Motion on threshold is called a hit. Setting this parameter higher than 1 helps avoid false motion detection hits, such as from video noise in a single frame. This setting ensures that positive motion detection is only reported when a hit is observed over a certain number of consecutive frames. When enough consecutive hits have been observed, the first hit in the series is marked as the beginning of motion.
- Advanced settings
- When an H.264 stream is selected as the recording stream, the Advanced settings button is available. Click this button to open the H.264 advanced motion detection settings dialog box where you can refine your motion detection settings for an H.264 stream.
- Vector emphasis
- Sets motion detection based on the difference in motion vector values (movement) between consecutive frames.
- Luma emphasis
- Sets motion detection based on the difference in luma values (brightness) between consecutive frames.
- Allows you to customize your settings using the available sliders, if the
Vector and Luma emphasis presets do not provide desirable results (if
you are getting too many, or too few motion events). Adjust the following slider
values between 0 and 100, until you achieve desirable results. The higher the value,
the more motion is detected.
- Luma weight. Sets motion detection based on the difference in luma values (brightness) between consecutive frames.
- Chroma weight. Sets motion detection based on the difference in chroma (color) values between consecutive frames.
- Vectors weight. Sets motion detection based on the difference in vector values (movement) between consecutive frames.
- Macroblocks weight. Sets motion detection based on the presence of intra-macroblocks in your frame. This setting is useful when you notice motion detection indicators on still frames. For example, some units generate frames completely comprised of intra-macroblocks as a new reference point. When this happens, you will see motion detection blocks covering your whole image. Setting the Macroblocks weight to 0 helps prevent this from happening.
- Motion zones
- A motion zone defines where on the video image motion should be detected. Up to six different motion zones can be defined per configuration.
- For the purpose of motion detection, the video image is divided into a large number of blocks (1,320 for NTSC encoding standard and 1,584 for PAL). Each of these blocks can be individually turned on/off for motion detection. A block where motion detection is turned on is represented by a semi-transparent blue square overlay on the video image.
- Motion on threshold
- Indicates the minimum number of motion blocks that must be detected before the motion is significant enough to be reported. Together with the Consecutive frame hits, positive motion detection is made.
- Motion off threshold
- In the same way the Motion on threshold detects the beginning of motion, the Motion off threshold detects the end of motion. Motion is considered stopped when the number of motion blocks drops below the Motion off threshold for at least 5 seconds.
- Test zone
- The motion zone is displayed as blue overlays. The motion blocks are displayed as green overlays. The number of motion blocks is updated in real time. When the number of motion blocks reaches the Motion threshold, it is displayed in red.
- Test all zones
- In this mode, all motion zones are displayed at once, with the number of motion blocks in each displayed separately.
- View all motion
- Test the entire video image for motion. All motion anywhere on the image is displayed as motion blocks (green overlays). The total number of motion blocks is updated in real time. Use this mode to test the sensitivity setting for this camera.
- Select the events related to motion detection generated by the system (default or custom events).