Apparatus and method for normalizing face image used for detecting drowsy driving
First Claim
1. An apparatus for extracting and normalizing a face image to detect a driver'"'"'s state of alertness, the apparatus comprising:
- a lens for photographing a driver'"'"'s face;
a first motor for moving the lens in a forward or rearward direction in order to adjust a zoom parameter;
a second motor for moving the lens in a horizontal or vertical direction in order to adjust a pan parameter or a tilt parameter; and
a controller for extracting an initial face area from a photographed driver'"'"'s face image which is an input image and controlling operations of the first motor and the second motor if normalization of the face image is required by analyzing the extracted initial face area, wherein the pan parameter is adjusted by controlling movement of the lens with the second motor until a central x coordinate is positioned between two main vertical lines of the initial face area.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed are an apparatus and a method for normalizing an image of a driver'"'"'s face in a predetermined size on the center of a monitor by automatically controlling a lens when the image of the driver'"'"'s face is detected. The apparatus includes a lens for photographing a driver'"'"'s face, a first motor for moving the lens in a forward or rearward direction in order to adjust a zoom parameter, a second motor for moving the lens in a horizontal or vertical direction in order to adjust a pan parameter or a tilt parameter, and a controller for extracting an initial face area from a photographed image and controlling operations of the first motor and the second motor according to the extracted initial face area.
-
Citations
18 Claims
-
1. An apparatus for extracting and normalizing a face image to detect a driver'"'"'s state of alertness, the apparatus comprising:
-
a lens for photographing a driver'"'"'s face; a first motor for moving the lens in a forward or rearward direction in order to adjust a zoom parameter; a second motor for moving the lens in a horizontal or vertical direction in order to adjust a pan parameter or a tilt parameter; and a controller for extracting an initial face area from a photographed driver'"'"'s face image which is an input image and controlling operations of the first motor and the second motor if normalization of the face image is required by analyzing the extracted initial face area, wherein the pan parameter is adjusted by controlling movement of the lens with the second motor until a central x coordinate is positioned between two main vertical lines of the initial face area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for normalizing face image extraction in an apparatus for extracting the face image used for detecting a driver'"'"'s state of alertness, which includes a camera having lens enabling pan, tilt, and zoom parameter adjustment, the method comprising the steps of:
-
extracting an initial face area from an input image, via a controller of the apparatus; calculating face elements based on the extracted initial face area, via the controller of the apparatus; determining if adjustment of a pan parameter, a tilt parameter, and a zoom parameter are required by analyzing results of the calculated face elements, via the controller of the apparatus; and obtaining a normalized face image by adjusting at least one of the pan parameter, the tilt parameter, and the zoom parameter according to the determination result, wherein the pan parameter is adjusted by controlling movement of the lens in a predetermined direction until a central x coordinate is positioned between two main vertical lines of the initial face area. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
-
Specification