Olympus Corporation

Honda Motor Co., Ltd.

Toshiaki Matsuzawa

Yoshiaki Kobayashi

Yuya Goto

Hiroyuki Urabe

Takayuki Toyoshima

Toru Takenaka

Terumasa Morita

Yukio Eda

Go Ryu

Kimiyoshi Kusaka

Kenta Kakutani

Hideki Kakinuma

Ittoku Hirashima

A driving assistance apparatus according to the present disclosure includes: a vehicle acceleration detection unit configured to detect vehicle acceleration including lateral acceleration and longitudinal acceleration of a vehicle; a calculation unit configured to calculate for each wheel a friction circle, and a lateral force generated at each wheel and a longitudinal force generated at each wheel on the basis of a result of detection by the vehicle acceleration detection unit; and a display unit configured to display an image based on the friction circle, and a magnitude and/or a direction of a resultant force of the lateral force and the longitudinal force generated at each wheel based on a result of calculation by the calculation unit.

Driving assistance apparatus, recording medium having driving assistance program recorded thereon, and driving assistance method

Provided is a driving evaluation device that enables evaluation of driving for the purpose of improving a driving time in a circuit racecourse, for example. The driving evaluation device includes an evaluation section extractorthat detects a deceleration section and an acceleration section in cornering, a section average classifierthat calculates, based on a front-rear acceleration and a lateral acceleration, an acceleration norm average value in the deceleration section and that in the acceleration section, and a skill deficiency evaluatorthat evaluates driving skill based on the acceleration norm average value in the deceleration section and that in the acceleration section.

Driving evaluation device and driving evaluation method

Provided is a driving evaluation device that enables evaluation of driving for the purpose of improving a driving time in a circuit racecourse. The driving evaluation device includes an evaluation section extractorthat detects a deceleration section and an acceleration section in cornering, a tire friction circle-load factor calculatorthat calculates, based on a front-rear acceleration and a lateral acceleration, a tire friction circle and a tire load factor in the deceleration section and those in the acceleration section, and a skill deficiency evaluatorthat evaluates driving based on the tire friction circle and the tire load factor in the deceleration section and those in the acceleration section.

The present disclosure relates to a hub bracket structure wherein a hub bracket that connects a trailing arm and a hub includes a hub mounting surface, a front connecting surface that connects a front portion of the hub mounting surface and the trailing arm, and a rear connecting surface that connects a rear portion of the hub mounting surface and the trailing arm, each of the front connecting surface and the rear connecting surface is formed in a plate shape extending in up-down and vehicle width directions, and an angle formed by the hub mounting surface and the front connecting surface is greater than an angle formed by the hub mounting surface and the rear connecting surface.

Hub bracket structure

A hub bracket structure includes a hub bracket that connects a trailing arm and a hub carrier, wherein the hub bracket includes a bracket body that includes a mounting surface mounted with the hub carrier, and a rear connector that extends from the bracket body toward the trailing arm behind a ground contact point of a rear wheel, and the rear connector is extended to a position to overlap with a rear surface of the trailing arm in a front-rear direction and is joined to the rear surface of the trailing arm.

A calibration device includes: a two-dimensional image conversion element having a plurality of pixels; and an optical system for forming an image-formation relationship between the two-dimensional image conversion element and a three-dimensional world coordinate space, the calibration device including a computer, the computer being configured to: acquire calibration data indicating a correspondence between two-dimensional pixel coordinates in the image conversion element and three-dimensional world coordinates in the world coordinate space; and calculate parameters of a camera model by fitting, to the acquired calibration data, the camera model representing two coordinate values of the two-dimensional pixel coordinates as functions of three coordinate values of the three-dimensional world coordinates, wherein the camera model represents the two coordinate values of the two-dimensional pixel coordinates by means of a linear sum of a plurality of two-dimensional vector functions having, as elements, the functions of the three coordinate values of the three-dimensional world coordinates.

Calibration device, calibration method, optical device, image-acquisition device, and projection device

A calibration apparatus is configured to acquire calibration data indicating a correspondence between two-dimensional pixel coordinates of the image-conversion device and three-dimensional world coordinates of the world coordinate space and calculate parameters by fitting, to the acquired data, a camera model in which two coordinate values of the two-dimensional pixel coordinates are expressed as a function of three coordinate values of the three-dimensional world coordinates. When a projection relationship between an angle of view and an image height of the optical system is roughly expressed by a predetermined expression by using a projection focal distance, the apparatus is configured to convert three-dimensional world coordinates of the acquired data to two-dimensional coordinates and, subsequently, by fitting a camera model in which the two coordinate values of the two-dimensional pixel coordinates are expressed as a function of two coordinate values of the two-dimensional coordinates, calculate the parameters of the camera model.

Calibration apparatus, calibration method, optical apparatus, image capturing apparatus, and projection apparatus

Provided is a calibration device for an optical device including a two-dimensional image conversion element having a plurality of pixels and including an optical system that forms an image-forming relationship between the image conversion element and a three-dimensional world coordinate space, the calibration device including: a computer, wherein the computer is configured to: obtain calibration data representing the correspondence between two-dimensional pixel coordinates of the image conversion element and three-dimensional world coordinates of the world coordinate space; and fit a camera model representing the direction of a principal ray in the world coordinate space, corresponding to the pixel coordinates, as a function of the pixel coordinates, to the calibration data obtained, thereby calculating parameters of the camera model.

Calibration device, calibration method, optical device, photographing device, projecting device, measurement system, and measurement method

A calibration device for an optical device including a two-dimensional image conversion element having a plurality of pixels and an optical system that forms an image-formation relationship between the image conversion element and the three-dimensional world coordinate space. The calibration device includes: a calibration-data acquisition unit that acquires calibration data representing the correspondence between two-dimensional pixel coordinates in the image conversion element and three-dimensional world coordinates in the world coordinate space; and a parameter calculating unit that calculates parameters of a camera model by applying, to the calibration data acquired by the calibration-data acquisition unit, a camera model in which two coordinate values of the three-dimensional world coordinates are expressed as functions of the other one coordinate value of the world coordinates and the two coordinate values of the two-dimensional pixel coordinates.

Calibration device, calibration method, optical device, image-capturing device, projection device, measuring system, and measuring method

An apparatus is for evaluating optical characteristics of an optical system based on an image forming position of a point image formed through the optical system. The apparatus includes a point image producing unit that forms a point image through the optical system in each point light source; an imaging unit that images the point images to produce a point image distribution image; and a moving unit that changes relative distance between the optical system and the point light source or the imaging unit in an optical axis direction. The apparatus also performs processing of detecting an image forming position in each different relative distance of the point image based on image information of the point image distribution images, the processing including calculating a regression expression for the detected image forming positions to obtain a shape parameter of the image axis in each of the point images.

Apparatus and method for evaluating optical system

This lens evaluation device comprises a plurality of point light sources arranged on the plane, an imaging unit for picking up an object and obtaining its image, a movement unit for changing the relative distance between the point light source or the imaging unit and the optical system to be evaluated, a storage medium for recording stack images obtained by the imaging unit picking up the images of the plurality of point light sources via the optical system every time the movement unit changes the relative distance, an image position calculation unit for calculating a plurality of image positions from the plurality of pieces of point light source image in the stack image recorded on the storage medium and an aberration acquisition unit for fitting an aberration model function to the plurality of image positions calculated and obtaining an aberration measurement value.

Growing community of inventors

Tokyo, Japan

Toshiaki Matsuzawa