Method and system for volume determination using structure from motion algorithm

Abstract

The present invention provides a volume determination method and system using a structure recovery from motion algorithm. A method of volume determination of an object for a construction site includes moving the camera along a path around the object while repeatedly orienting the camera onto the object, during which time a series of images of the object are captured with the camera, the series of The images comprise a plurality of images captured from different points on the path with different orientations of the camera, the series of images being represented by the image data set collected, using the series of images to perform recovery from motion assessment using a defined algorithm and Generate a spatial representation therefrom, including the surface of the object (1), scale this spatial representation with the help of given information about known absolute references on the scale, define the ground surface for the object and apply it to the A spatial representation, and computes and outputs the absolute volume of the object based on the scaled spatial representation and the defined ground surface.

Description

technical field [0001] The present invention relates to a method and system for determining the volume of an object on a construction site. Background technique [0002] On construction sites it is often necessary to determine the volume of objects such as stockpiles or hollow spaces such as potholes, interstices or mines. [0003] A traditional method for determining such volumes is to scan the object with a measuring device such as a laser scanner, total station, stereo camera or a set of fixed mounted cameras. Since from one station only a part of the stockpile can be measured, while other surface points are blocked, it is necessary to have measuring devices at at least three different locations relative to, for example, the stockpile so that the stockpile can be measured in combination. the entire surface. The stockpile is captured from each station, ie the spatial position of the surface point of the stockpile is measured relative to the measuring device. Next, combi...

AI Technical Summary

Problems solved by technology

The main disadvantage of such an approach lies in the fact that cameras such as laser scanners, total stations, stereo cameras or multiple cameras are expensive hardware and need to be operated and positioned by a technician.

In addition, it is time consuming to set up such measuring devices in three different positions and to determine these positions at least relative to each other

In some cases, however, such an expenditure of time and money is relatively crude because it does not require high accuracy of position measurements performed by geodetic devices such as total stations and of the resulting volume determination. value would be sufficient and somewhat wasteful

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