Navigation system, portable terminal device, and peripheral-image display method

Abstract

A navigation system (10) constructed from a portable terminal device (20) having a route search server (30) provided with route search means (33) for searching for a guidance route from a start point up to a destination; GPS receiving means (21) for positioning a current position; imaging means (22); and display means (28) for displaying, along with a peripheral image captured by the imaging means (22), a guidance route, a guidance image in the direction of advance, or an image representing a place of interest. The portable terminal device (20) further has display control means (25) for controlling display of the peripheral image displayed on the display means (28). The display control means (25) controls the position of display of the peripheral image, captured by the imaging means (22), so that the center of optical axis of the imaging means (22) is below the center of the display screen. Even if the direction of the optical axis of the imaging means (22) is directed downward from a horizontal line, the horizontal direction of the peripheral image is displayed on the display screen.

Description

technical field [0001] The present invention relates to a communication-type pedestrian navigation system that searches for a guidance route from a departure point to a destination, uses image information displayed on a display device of a portable terminal device, and guides the guidance route. In particular, it relates to a navigation system for pedestrians that uses The photographing device of the portable terminal device captures the surrounding scenery of the intersection, and displays it on the display device as a surrounding image, and displays a route guide image or a direction guide image on the displayed surrounding image. In the posture, even if the optical axis direction of the photographing device is horizontally downward, the horizontal direction of the surrounding image will be displayed on the display screen. Background technique [0002] In the past, when looking for a destination in an unfamiliar place, with the help of tools such as an atlas, confirm the m...

AI Technical Summary

Problems solved by technology

In addition, in a communication-type navigation system, the communication load between the terminal device and the route search server increases, and the communication time also becomes longer.

For this reason, various problems such as requiring extremely high processing capacity to a route search server that provides services to many terminal devices arise.

Images