To provide an ortho-image creation method and system as well as a three-dimensional model creation method and system which easily examine a road state on the basis of a photographed image captured from the sky even when a part of a road surface is covered by an obstacle when viewed from the sky.SOLUTION: An ortho-image creation method includes the steps of: acquiring a plurality of first photographed images by a first imaging device from the altitude higher than an obstacle; acquiring a plurality of second photographed images by a second imaging device from the altitude lower than the obstacle; acquiring three-dimensional coordinates for a first feature point that is outside a region covered by the obstacle but is included in the plurality of first photographed images; acquiring three-dimensional coordinates for a second feature point that is in the region covered by the obstacle and is included in the plurality of second photographed images; and creating a corrected ortho-image obtained by correcting the region covered by the obstacle on a road surface to the region not covered by the obstacle on the basis of the plurality of first photographed images, the plurality of second photographed images and the three-dimensional coordinates of the first feature point and the second feature point.SELECTED DRAWING: Figure 5
【課題】上空から見たときに道路表面の一部が障害物により覆われている場合でも、上空から撮影した撮影画像に基づいて道路状態を容易に調査するオルソ画像作成方法及びシステム並びに3次元モデル作成方法及びシステムを提供する。【解決手段】オルソ画像作成方法は、障害物より高い高度から第1撮影装置により撮影して複数の第1撮影画像を取得し、障害物より低い高度から第2撮影装置により撮影して複数の第2撮影画像を取得し、障害物により覆われた領域以外にあり且つ複数の第1撮影画像に含まれた第1特徴点についての3次元座標を取得し、障害物により覆われた領域にあり且つ複数の第2撮影画像に含まれた第2特徴点についての3次元座標を取得し、複数の第1撮影画像、第2撮影画像と第1特徴点、第2特徴点の3次元座標とに基づいて、道路表面の障害物により覆われた領域を、障害物に覆われてない領域に補正した補正オルソ画像を作成する。【選択図】図5
ORTHO-IMAGE CREATION METHOD, ORTHO-IMAGE CREATION SYSTEM, THREE-DIMENSIONAL MODEL CREATION METHOD, THREE-DIMENSIONAL MODEL CREATION SYSTEM, AND MARKER USED THEREFOR
オルソ画像作成方法、オルソ画像作成システム、3次元モデル作成方法、3次元モデル作成システム及びそれに使用される標識
2024-04-16
Patent
Electronic Resource
Japanese
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