Method for finding all frontal faces in arbitrarily complex visual scenes
AssigneeJustsystem Pittsburgh Research Center
InventorsShumeet Baluja, Henry Rowley
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Abstract
A method for detecting a face in an image includes the steps of applying the image to a first classification tool that determines a rotational angle for rotating the image that makes the image most resemble an upright face; rotating the image by the rotational angle determined by the first classification tool; and applying the rotated image to a second classification tool, which determines whether the rotated image represents a frontal face or not.
Claims21
A method for detecting a face in an unknown input image, comprising the steps of:
- applying the unknown input image to a first classification tool that determines a rotational angle for rotating the unknown input image to a position that makes the unknown input image most resemble an upright face;
- rotating the unknown input image by the rotational angle determined by the first classification tool;
- and
- applying the rotated unknown input image to a second classification tool which determines whether the rotated unknown input image represents a frontal face.
A method for detecting one or more faces in an unknown input image displayed by a pixel array, comprising the steps of:
- selecting from the unknown input image a subimage of a predetermined array size of pixels centered around a first pixel of the pixel array;
- applying the subimage to a first classification tool which determines a rotational angle for rotating the subimage to a position that makes the subimage most resemble an upright face;
- rotating the subimage by the rotational angle determined by the first classification tool;
- applying the rotated subimage to a second classification tool which determines whether the rotated subimage represents a frontal face;
- and
- repeating the above steps for each pixel in the pixel array of the unknown input image.
Dependencies are inferred from the claim text.