The invention relates to computer-implemented method for the 3D reconstruction of a ground surface area by stereophotogrammetry, comprising the steps of: determining corrected Rational Polynomial Camera, RPC, models by performing bundle adjustment (BA) of original RPC models each provided with an image of a set of images of the ground surface area acquired by a remote imaging sensor and each associated to a corresponding original projection function ({P.sub.m}) from a 3D object space to a 2D image space, wherein determining the corrected RPC models comprises determining corrected projection functions ({P.sub.m.sup.cor}) from the 3D object space to the 2D image space; and determining (PC) a 3D point cloud representative (3DPC) of the ground surface area by triangulation, based on the corrected RPC models, of stereo correspondences within images of the set of images.

In accordance with the invention, determining the corrected projection functions comprises determining, for each of the original projection function, a 3D corrective rotation around a remote imaging sensor center to be applied in the 3D space before performing the original projection function.

The invention relates to computer-implemented method for the 3D reconstruction of a ground surface area by stereophotogrammetry, comprising the steps of: determining corrected Rational Polynomial Camera, RPC, models by performing bundle adjustment (BA) of original RPC models each provided with an image of a set of images of the ground surface area acquired by a remote imaging sensor and each associated to a corresponding original projection function ({P.sub.m}) from a 3D object space to a 2D image space, wherein determining the corrected RPC models comprises determining corrected projection functions ({P.sub.m.sup.cor}) from the 3D object space to the 2D image space; and determining (PC) a 3D point cloud representative (3DPC) of the ground surface area by triangulation, based on the corrected RPC models, of stereo correspondences within images of the set of images.

In accordance with the invention, determining the corrected projection functions comprises determining, for each of the original projection function, a 3D corrective rotation around a remote imaging sensor center to be applied in the 3D space before performing the original projection function.

A parts processing assistance system includes a three dimensional measurement unit for acquiring a three dimensional measured data about a part, a display unit for displaying the part based on the three dimensional measured data, and a virtual assembly unit for virtually assembling the part displayed by the display unit on the display unit. According to this system, assembly error can be confirmed before an actual assembly work of parts.

Embodiments of the present invention discloses a metering adjustment method, apparatus and device and a storage medium. The method includes: acquiring brightness information of a current image frame and a previous image frame captured by a shooting apparatus of an unmanned aerial vehicle (UAV); determining whether the brightness information of the current image frame changes relative to the brightness information of the previous image frame; if so, acquiring motion state information of the shooting apparatus; and adjusting a metering mode of the shooting apparatus according to the motion state information of the shooting apparatus.

Embodiments of the present invention discloses a metering adjustment method, apparatus and device and a storage medium. The method includes: acquiring brightness information of a current image frame and a previous image frame captured by a shooting apparatus of an unmanned aerial vehicle (UAV); determining whether the brightness information of the current image frame changes relative to the brightness information of the previous image frame; if so, acquiring motion state information of the shooting apparatus; and adjusting a metering mode of the shooting apparatus according to the motion state information of the shooting apparatus.

A measuring system configured to measure a position of an object is provided with an imaging apparatus and an information processing apparatus, wherein: the imaging apparatus is a camera having a frame rate of 100 fps or higher, and is configured to image the object included in the angle of view of the camera, as an image; the information processing apparatus is provided with a communication unit, an IPM conversion unit, and a position measuring unit; the communication unit is connected to the imaging apparatus, and is configured to receive the image captured by the imaging apparatus; the IPM conversion unit is configured to set at least a part of the image including the object as a predetermined area, and to perform an inverse perspective projection transportation of the image to generate an IPM image limited to the predetermined area. Here, the IPM image is an image in which a predetermined area including the object is rendered as seen from overhead; and the position measuring unit is configured to measure the position of the object on the basis of the IPM image.

A measuring system configured to measure a position of an object is provided with an imaging apparatus and an information processing apparatus, wherein: the imaging apparatus is a camera having a frame rate of 100 fps or higher, and is configured to image the object included in the angle of view of the camera, as an image; the information processing apparatus is provided with a communication unit, an IPM conversion unit, and a position measuring unit; the communication unit is connected to the imaging apparatus, and is configured to receive the image captured by the imaging apparatus; the IPM conversion unit is configured to set at least a part of the image including the object as a predetermined area, and to perform an inverse perspective projection transportation of the image to generate an IPM image limited to the predetermined area. Here, the IPM image is an image in which a predetermined area including the object is rendered as seen from overhead; and the position measuring unit is configured to measure the position of the object on the basis of the IPM image.

A method for taking partially overlapping images of a ground surface from a camera arranged in an aircraft or a spacecraft, the method including: while the aircraft or the spacecraft is moving, acquiring images at different instants in time, separated by time intervals; detecting, during the moving, position information representative of a position and orientation information representative of an orientation of the aircraft of the spacecraft; using the position information, the orientation information, and the camera's viewing angle to determine maximal values of time intervals for which images with a predetermined amount of spatial overlap can be obtained; and adjusting the intervals towards the maximal values so as to minimize the number of the acquired images while maintaining the predetermined amount of spatial overlap.

A method for taking partially overlapping images of a ground surface from a camera arranged in an aircraft or a spacecraft, the method including: while the aircraft or the spacecraft is moving, acquiring images at different instants in time, separated by time intervals; detecting, during the moving, position information representative of a position and orientation information representative of an orientation of the aircraft of the spacecraft; using the position information, the orientation information, and the camera's viewing angle to determine maximal values of time intervals for which images with a predetermined amount of spatial overlap can be obtained; and adjusting the intervals towards the maximal values so as to minimize the number of the acquired images while maintaining the predetermined amount of spatial overlap.

The invention relates to computer-implemented method for the 3D reconstruction of a ground surface area by stereophotogrammetry, comprising the steps of: determining corrected Rational Polynomial Camera, RPC, models by performing bundle adjustment (BA) of original RPC models each provided with an image of a set of images of the ground surface area acquired by a remote imaging sensor and each associated to a corresponding original projection function ({P.sub.m}) from a 3D object space to a 2D image space, wherein determining the corrected RPC models comprises determining corrected projection functions ({P.sub.m.sup.cor}) from the 3D object space to the 2D image space; and determining (PC) a 3D point cloud representative (3DPC) of the ground surface area by triangulation, based on the corrected RPC models, of stereo correspondences within images of the set of images. In accordance with the invention, determining the corrected projection functions comprises determining, for each of the original projection function, a 3D corrective rotation around a remote imaging sensor center to be applied in the 3D space before performing the original projection function.