Device and method for seat supervision in motor vehicles
First Claim
1. A device for seat supervision in motor vehicles comprising:
- a pulsed monochromatic light source for the short-time illumination of a supervised space;
an image sensor array for recording an image of the supervised space which has a global electronic shutter which enables the illumination time of the image sensor array to be adjusted independently of a readout clock of the image sensor array;
a synchronizer for synchronizing the operation of the pulsed light source and the image sensor array;
a controller for controlling the light source and the image sensor array so as to create a first image of the supervised space during illumination of the supervised space at a first time and to create a second image of the supervised space without illumination of the supervised space a second time; and
a difference image former for creating a difference image from the first and the second image.
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Accused Products
Abstract
A device for seat supervision in motor vehicles has a pulsed monochromatic light source for the short-time illumination of a supervised space. An image sensor array (ISA) is also provided for recording an image of the supervised space. The ISA is provided with a global electronic shutter unit which permits the illumination time of the ISA to be adjusted independently of a readout clock of the ISA. A synchronization unit for synchronizing the operation of the pulsed laser source and the ISA is provided. Also provided is a control unit for controlling the light source and the ISA so as to create a first image of the supervised space during illumination of the same at a first time and to create a second image of the supervised space without illumination of the same at a second time. Finally, a unit for creating a difference image from the first and second images is also provided.
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Citations
9 Claims
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1. A device for seat supervision in motor vehicles comprising:
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a pulsed monochromatic light source for the short-time illumination of a supervised space;
an image sensor array for recording an image of the supervised space which has a global electronic shutter which enables the illumination time of the image sensor array to be adjusted independently of a readout clock of the image sensor array;
a synchronizer for synchronizing the operation of the pulsed light source and the image sensor array;
a controller for controlling the light source and the image sensor array so as to create a first image of the supervised space during illumination of the supervised space at a first time and to create a second image of the supervised space without illumination of the supervised space a second time; and
a difference image former for creating a difference image from the first and the second image. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for seat supervision in motor vehicles, comprising the following steps:
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a) illuminating a supervised space using a pulsed monochromatic light source employing an illumination time in the microsecond or nanosecond range;
b) recording a first image of the supervised space during the illumination in step a) using an image sensor array;
c) recording a second image of the supervised space, without illuminating the supervised space with the light source, a maximum of 10 ms before or after the first image; and
d) creating a difference image from the first and the second image. - View Dependent Claims (8, 9)
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Specification