Road measurement device and method for measuring road

Abstract

In a road measurement device, a calibration unit (48) generates a formation parameter used for formation of a scale image from a result of picking-up a calibration figure for calibration by an image pick-up means (10). An image acquisition unit (44) acquires a road image at every predetermined running distance from the image pick-up means (10). In this event, a coordinate information acquisition unit (56) relates coordinate information acquired from a coordinate acquisition device (12) to the road information. An image pick-up height and angle acquisition unit (46) acquires from an image height and angle measurement unit (11) a height from the road surface and an angle defined between an image pick-up direction and a direction in parallel with the road plane when the image pick-up means (10) picks up the road image. A scale formation unit (50) selects the formation parameter in accordance with the height and the angle, at which the image pick-up direction is parallel to with the road surface, acquired by the image pick-up height and angle acquisition unit (46), and generates a scale image based on the formation parameter.

Description

technical field [0001] The present invention relates to a road measuring device and a road measuring method, and more particularly to a road measuring device and a road measuring method which photograph a road surface and along a road, and generate a scale image on the road image for checking the width of the road. Background technique [0002] Conventionally, techniques have been proposed that capture images of various points on roads and generate map information used for road management, vehicle operation management, and the like. For example, Patent Document 1 below discloses a map creation support system that acquires position information and images by measuring vehicles to create a map. [0003] [Patent Document 1] Japanese Patent Laid-Open No. 2007-206099 [0004] However, the above-mentioned conventional technology does not have a configuration for measuring the width of a road or the like from an image captured by a photographing means. Therefore, when the imaging ...

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Problems solved by technology

[0004] However, the above-mentioned conventional technology does not have a structure for measuring the width of a road, etc., from an image captured by a photographing means.

Therefore, when the imaging conditions (the height from the road surface and the imaging direction) of the imaging means (height from the road surface and imaging direction) of the imaging mechanism such as a video camera mounted on the vehicle change with the weight of the driver of the vehicle and the posture during driving, the road to be imaged This does not take into account the length change in the image of the object such as

In addition, four-wheeled vehicles have traditionally been equipped with imaging devices, GPS receivers, etc. to take pictures of roads, etc., and perform road measurements. In some cases, obstacles may occur in the passage of measurement vehicles, and road measurement cannot be carried out

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