IMAGE CAPTURING DEVICE, OPERATOR MONITORING DEVICE, METHOD FOR MEASURING DISTANCE TO FACE, AND PROGRAM
First Claim
1. An imaging device, comprising:
- a camera unit that respectively captures, by using at least two optical systems, images of the same object;
a face part detection unit that detects, from each of the images captured by the camera unit, a plurality of face parts composing a face included in the image;
a face part luminance calculation unit that calculates luminance of the detected plurality of face parts;
an exposure control value determination unit that determines an exposure control value of the camera unit based on the luminance of the plurality of face parts; and
a distance measurement unit that measures distances to the plurality of face parts based on the at least two images captured by the camera unit using the corrected exposure control value, whereinthe exposure control value determination unit determines the exposure control value of the camera unit so that the maximum one of the luminance of the plurality of face parts becomes a predetermined target luminance.
1 Assignment
0 Petitions
Accused Products
Abstract
An imaging device (1) includes a camera unit (3) that captures images of the same object, respectively, using two optical systems, a face part detection unit (9) that detects a plurality of face parts composing a face included in each of the images captured by the camera unit (3), a face part luminance calculation unit (10) that calculates luminance of the detected plurality of face parts, and an exposure control value determination unit (12) that determines an exposure control value of the camera unit (3) based on the luminance of the plurality of face parts. A distance measurement unit (17) in the imaging device (1) measures distances to the face parts based on the images captured by the camera unit (3) using the exposure control value. Thus, the imaging device (1) can measure the distances to the face parts with high accuracy.
-
Citations
12 Claims
-
1. An imaging device, comprising:
-
a camera unit that respectively captures, by using at least two optical systems, images of the same object; a face part detection unit that detects, from each of the images captured by the camera unit, a plurality of face parts composing a face included in the image; a face part luminance calculation unit that calculates luminance of the detected plurality of face parts; an exposure control value determination unit that determines an exposure control value of the camera unit based on the luminance of the plurality of face parts; and a distance measurement unit that measures distances to the plurality of face parts based on the at least two images captured by the camera unit using the corrected exposure control value, wherein the exposure control value determination unit determines the exposure control value of the camera unit so that the maximum one of the luminance of the plurality of face parts becomes a predetermined target luminance. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
-
-
2. (canceled)
-
10. A driver monitoring device, comprising:
-
a camera unit that respectively captures, by using at least two optical systems, images of a driver as an object of shooting; a face part detection unit that detects a plurality of face parts composing a face of the driver from each of the images captured by the camera unit; a face part luminance calculation unit that calculates luminance of the detected plurality of face parts; an exposure control value determination unit that determines an exposure control value of the camera unit based on the luminance of the plurality of face parts; a distance measurement unit that measures distances to the plurality of face parts of the driver based on the at least two images captured by the camera unit using the exposure control value; a face model generation unit that generates a face model of the driver based on distance measurement results of the plurality of face parts; and a face tracking processing unit that performs processing for tracking a direction of the face of the driver based on the generated face model, wherein the exposure control value determination unit determines the exposure control value of the camera unit so that the maximum one of the luminance of the plurality of face parts becomes a predetermined target luminance.
-
-
11. A method for measuring a distance to a face, comprising:
-
capturing respectively, by using at least two optical systems, images of the same object; detecting a plurality of face parts composing the face included in each of the captured images; calculating luminance of the detected plurality of face parts; determining an exposure control value for image capturing based on the luminance of the plurality of face parts so that the maximum one of the luminance of the plurality of face parts becomes a predetermined target luminance; and measuring distances to the faces based on the at least two images captured using the exposure control value.
-
-
12. A program for measuring a distance to a face, causing a computer to execute:
-
processing for detecting a plurality of face parts composing the face included in each of images of the same object, the images being respectively captured by at least two optical systems; processing for calculating luminance of the detected plurality of face parts; processing for determining an exposure control value for image capturing based on the luminance of the plurality of face parts so that the maximum one of the luminance of the plurality of face parts becomes a predetermined target luminance; and processing for measuring distances to the faces based on the at least two images captured using the exposure control value.
-
Specification