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63
Figure 5-26 Isotherm
5.3 Configuring IVS
5.3.1 Scene-Selecting Requirements
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The target should occupy no more than 10% of the whole image.
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The target size in the image should be no more than 10 × 10 pixels. The size of abandoned object
in the image should be no less than 15 × 15 pixels (CIF image). The target height and width
should be no more less than a third of the image height and width. The recommended target
height is 10% of the image height.
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The brightness difference of the target and the background should be no less than 10 gray levels.
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The target should be continuously present in the image for no less than 2 seconds, and the
moving distance should be larger than its width and no less than 15 pixels (CIF image) at the
same time.
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Reduce the complexity of surveillance scene as much as you can. Intelligent analysis functions
are not recommended to be used in scene with dense targets and frequent illumination change.
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Avoid areas such as glass, reflective ground, water surface, and areas interfered by branch,
shadow and mosquito. Avoid backlight scene and direct light. Control image proportion of
objects that are with high relative ambient temperature.
5.3.2 Configuration Flow
Figure 5-27 Configuration Flow
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