초록 ▼

Methods and apparatus for accurately surveying and determining the physical location of objects in a scene are disclosed which use image data captured by one or more cameras and three points from the scene which may either be measured after the images are captured or may be included in the calibrate

Methods and apparatus for accurately surveying and determining the physical location of objects in a scene are disclosed which use image data captured by one or more cameras and three points from the scene which may either be measured after the images are captured or may be included in the calibrated target placed in the scene at the time of image capture. Objects are located with respect to a three dimensional coordinate system defined with reference to the three points. The methods and apparatus permit rapid set up and capture of precise location data using simple apparatus and simple image processing. The precise location and orientation of the camera utilized to capture each scene is determined from image data, from the three point locations and from optical parameters of the camera.

대표청구항 ▼

A method of measuring the absolute three dimensional location of a point D with respect to a coordinate system defined using three points, A, B and C, separated by known distances using image data comprising: a. capturing two images of a scene containing the points of B, C and D, using one or more c

A method of measuring the absolute three dimensional location of a point D with respect to a coordinate system defined using three points, A, B and C, separated by known distances using image data comprising: a. capturing two images of a scene containing the points of B, C and D, using one or more cameras of known principal distance, b. determining the location and orientation of said one or more cameras at the time each of said images was captured with reference to said coordinate system using 3 to 5 points from said images, principal distance and said known distances, c. using the locations of the one or more cameras at the time the images were captured to determine the location of said point D from image data.