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Configure Face Detection for Best Results

The face detector has three parameters that you can use to tune its performance.

  Description Default value Example
FaceSizeMin

The smallest size of face (from top to bottom) that Image Server attempts to detect, as a fraction of the smallest image dimension (width or height).

Setting FaceSizeMin to smaller values causes face detection to take longer. Setting FaceSizeMin to a value that is too large is a common cause of face detection failure.

0.15

FaceSizeMin=0.15

For an image of 1024x768 pixels, this value limits face detection to faces that are equal to, or greater than, 115 pixels high.

ColorAnalysis Whether to assess the color of face candidates, in order to reduce false positives. False -

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