Denso Corporation

Masahiro Iida

Nobuhiro Mizuno

Tadao Nojiri

Hisashi Shigekusa

Masami Tanaka

Ikuro Sato

Kensaku Harada

A curve-shape modeling device that divides multiple sampling points along a route into a linear section, a relaxation curve section and a steady section, and models a curve shape of the route, includes: a curve extraction unit that extracts a curve from the sampling points based on a curvature of the sampling points; a steady section curvature determination unit that determines a curvature of the steady section based on a curvature of sampling points included in an extracted curve; and a curve entry and exit determination unit that sets a predetermined curvature range including the curvature of the steady section, and determines a start point and an end point of the steady section based on the curvature range.

Curve-shape modeling device, vehicle information processing system, curve-shape modeling method, and non-transitory tangible computer readable medium for the same

A curve modeling device includes a curvature calculation unit, a curvature correction unit, and a node information generation unit. The curvature calculation unit calculates a curvature of each sampling point on a route based on location information of each sampling point. The curvature correction unit corrects the curvature at each sampling point and approximates the route by a straight line interval, an arc interval, or a smooth curve interval. The node information generation unit builds a shape model of a curve included in the route by generating node information indicative of a node location on a road corresponding to the route based on the corrected curvature of the sampling point. The curvature correction unit corrects the curvature under a condition that an orientation difference defined by the calculated curvatures maintains a constant value.

Curve modeling device, curve modeling method, and vehicular navigation device

A travel trace storage apparatus includes a location detection device, a positioning trace generation device, a movement distance detection device, a travel direction detection device, a dead reckoning trace generation device for generating a dead reckoning trace, in which each vector determined by a vehicle movement distance and a vehicle travel direction is chronologically arranged, a correction positioning trace generation device for generating a correction positioning trace obtained by removing a location distant from the dead reckoning trace by a predetermined distance or more, a correction dead reckoning trace generation device for generating a correction dead reckoning trace obtained by correcting the dead reckoning trace, an absolute trace generation device for generating an absolute trace obtained by synthesizing the correction positioning trace and the correction dead reckoning trace, an absolute trace memory for storing the absolute trace.

Travel trace storage apparatus

When determining that a subject vehicle traveled a curve, a road shape learning apparatus amends an entrance coordinate, a middle coordinate, and an exit coordinate of the curve based on predetermined amendment values to thereby obtain a post-amendment entrance coordinate, a post-amendment middle coordinate, and a post-amendment exit coordinate. The road shape learning apparatus computes a radius of a circular arc which passes through the post-amendment entrance coordinate, the post-amendment middle coordinate, and the post-amendment exit coordinate and designates the computed radius as a curvature radius of the curve.

Road shape learning apparatus

An in-vehicle device for detecting a driving condition includes: first and second sensors for detecting one of acceleration and angular speed; first and second determination units for determining whether a detection signal from each sensor is varied with a frequency equal to or larger than a predetermined determination frequency and with a variation amount larger than a predetermined variation threshold; and a vibration noise removal unit for determining that a vibration noise is superimposed on each detection signal. The vibration noise removal unit removes the vibration noise from each detection signal.

In-vehicle device for detecting driving condition and computer program product for use in the same

An image region of an image data memory is dissected into a plurality of search sections. Brightness change points in each of the search sections are counted based on image data of each search section. A candidate region having a likelihood of involving an information code is detected based on the count value of the brightness change points. And, the candidate region is identified as the existing area of the information code.

Method for detecting a two-dimensional code existing area, method reading two-dimensional code, and a recording medium storing related programs

An image of a region is taken which includes a two-dimensional code. A two-dimensional code area is determined in the image. The two-dimensional code area corresponds to the two-dimensional code. Inspection lines are set which connect opposite sides in two pairs among four sides indicating boundaries of the two-dimensional code area in cases where the two-dimensional code is of a cell matrix type. Inspection lines are set which connect opposite sides in one pair among four sides indicating boundaries of the two-dimensional code area in cases where the two-dimensional code is of a bar-code stack type. Information is read from the two-dimensional code area on the basis of the inspection lines. Division points are set on the opposite sides in response to a ratio in length between sides adjacent to the opposite sides and a number of arrangements of cells in the two-dimensional code in cases where the two-dimensional code is of the cell matrix type. Division points are set on the opposite sides in response to a ratio in length between sides adjacent to the opposite sides and a number of stacked bar codes in the two-dimensional code in cases where the two-dimensional code is of the bar-code stack type. The inspection lines are set which connect corresponding ones of the division points.

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Kariya, Japan

Masahiro Iida