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The Face Detection object is created on the basis of the Camera object in the Hardware tab of System settings dialog box.
To configure Face detection tool, do the following:
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If the Process color video checkbox is unset, the color video image will be converted to black and white image to generate the vectors by the black-and-white frames. This function is supported by Tevian 2.3.0 face recognition module only. It reduces the CPU load, insignificantly affecting face capture and recognition quality (see Face Intellect Administrator's Guide for details).
The video image resolution received by the Face Detection from the camera can be changed using the ResizeWidth registry key (for details, see Registry keys reference guide) |
By default the Face detection tool processes a video with the resolution set for the Camera parent object. To process a video with 320x240 pixels resolution, set the Process video in low resolution checkbox (7).
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| Enabling this option reduces the load of the Server’s processor, but the probability of face detection also reduces. |
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| The Process video in low resolution setting is not relevant in case, when a high resolution is set for a Camera parent object. |
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Set approximate width of face on the video image in pixels;
In the From field enter minimally allowable width of face on the video image (8).
In the To field enter maximally allowable width of face on the video image (9).
Set approximate height of face on the video image in pixels;
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In the From field enter minimally allowable height of face on the video image (10).
In the To field enter maximally allowable height of face on the video image (11).
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| Faces won't be detected if specified minimal sizes highly differ from actual sizes. For example, if there are big faces (15-30%) on the video and minimal size is 5% and maximal size is 80%, then faces won't be detected. But if minimal size is 12% and maximal size is 80%, then faces will be detected. So, detection won't detect big faces if it is configured for detection of small faces, and vice versa. |
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If all face sizes are set to 0, the Face Detection tool uses similar parameters set on the Face Recognition Server object settings panel being part of the Face Intellect software. |
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- To enable the pixelate function set the Pixelate area checkbox (12).
Set the Grain size cursor in position corresponding to the pixilation grain size in pixels (13).
Set the Face capture area’s scaling slider to the position corresponding to the required scaling of a face in the frame for recording (14). The current scale value is displayed in the field above the slider and ranges from 1 (only the face is recorded) to 5 (the whole frame is recorded).
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| This setting is relevant in case of installed Face-Intellect system. A frame with a face is recorded to the < Face-Intellect>\ Bmp\ person\ folder. |
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