STATE MONITORING APPARATUS
First Claim
1. A state monitoring apparatus mounted in a vehicle, comprising:
- at least one light emission part that emits light to project illumination light having a wavelength including at least a near infrared wavelength to a predetermined area that is defined as an area where a face of an occupant of the vehicle is positioned in space in a compartment of the vehicle;
an image pickup part that generates a picture image by receiving light incident from the predetermined area with an image sensor having a plurality of pixels;
a state monitoring section that monitors a state of the occupant based on a result of processing the picture image generated by the image pickup part; and
an optical control part that controls light distributionto cause an intensity of light incident on each pixel included in an image pickup predetermined areato be equal to or greater than an intensity reference value that is predetermined as an intensity of light providing a picture image suitable for image processing by the state monitoring section andto cause a distribution of the intensity of light incident on each pixel included in the image pickup predetermined areato be within a predetermined first reference range,the image pickup predetermined areabeing at least a part of a light receptive surface of the image sensor in the image pickup part, andcorresponding to the predetermined area.
1 Assignment
0 Petitions
Accused Products
Abstract
In an image pickup system, illumination light emitted by a light emission part is collected and reflected by an optical member and is distributed to a predetermined area. This light distribution to the predetermined area permits a constituent point farther away from the light emission part to receive illumination light having a greater intensity of light being equal to or greater than a predetermined reference value. The image pickup system thus distributing the illumination light enables the intensity of light incident on each pixel constituting an image pickup predetermined area to be equal to or greater than an intensity reference value while enabling the distribution of the intensity of light incident on each pixel constituting the image pickup predetermined area to be within a first reference range.
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Citations
26 Claims
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1. A state monitoring apparatus mounted in a vehicle, comprising:
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at least one light emission part that emits light to project illumination light having a wavelength including at least a near infrared wavelength to a predetermined area that is defined as an area where a face of an occupant of the vehicle is positioned in space in a compartment of the vehicle; an image pickup part that generates a picture image by receiving light incident from the predetermined area with an image sensor having a plurality of pixels; a state monitoring section that monitors a state of the occupant based on a result of processing the picture image generated by the image pickup part; and an optical control part that controls light distribution to cause an intensity of light incident on each pixel included in an image pickup predetermined area to be equal to or greater than an intensity reference value that is predetermined as an intensity of light providing a picture image suitable for image processing by the state monitoring section and to cause a distribution of the intensity of light incident on each pixel included in the image pickup predetermined area to be within a predetermined first reference range, the image pickup predetermined area being at least a part of a light receptive surface of the image sensor in the image pickup part, and corresponding to the predetermined area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A state monitoring apparatus mounted in a vehicle, comprising:
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at least one light emission part that emits light to project illumination light having a wavelength including at least a near infrared wavelength to a predetermined area that is defined as an area where a face of an occupant of the vehicle is positioned in space in a compartment of the vehicle; an image pickup part that generates a picture image by receiving light incident from the predetermined area with an image sensor having a plurality of pixels; a state monitoring part that monitors a state of the occupant based on a result of processing the picture image generated by the image pickup part; and an optical control part that includes an incident part that collects the illumination light projected by the light emission part, and a projecting part that performs, at a projecting surface, light distribution that projects the illumination light collected by the incident part to the space in the compartment to cause an intensity of light incident on each pixel included in an image pickup predetermined area to be equal to or greater than an intensity reference value predetermined as an intensity of light providing a picture image suitable for image processing by the state monitoring part and to cause a distribution of the intensity of light incident on each pixel included in the image pickup predetermined area to be within a predetermined first reference range, the image pickup predetermined area being at least a part of a light receptive surface of the image sensor in the image pickup part and corresponding to the predetermined area. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. An optical member used in a state monitoring apparatus that is mounted in a vehicle and includes
at least one light emission part that emits light to project illumination light having a wavelength including a near infrared wavelength to a predetermined area defined as an area where a face of an occupant of the vehicle is positioned in space in a compartment of the vehicle, an image pickup part that generates a picture image by receiving light incident from the predetermined area with an image sensor having a plurality of pixels, and a state monitoring part that monitors a state of the occupant based on a result of processing the picture image generated by the image pickup part, the optical member comprising: -
an incident part that collects illumination light emitted projected by the light emission part; and a projecting part that performs, at a projecting surface, light distribution that projects the illumination light collected by the incident part to the space in the compartment to cause an intensity of light incident on each pixel included in an image pickup predetermined area to be equal to or greater than an intensity reference value predetermined as an intensity of light providing a picture image suitable for image processing by the state monitoring part and to cause a distribution of the intensity of light incident on each pixel included in the image pickup predetermined area to be within a predetermined first reference range, the image pickup predetermined area being at least a part of a light receptive surface of the image sensor in the image pickup part and corresponding to the predetermined area.
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Specification