As is known to us, conventional photogrammetry uses the double phase stereopair for forward intersection, but this paper proposed a new method for 3D coordinates acquisition based on single camera. Under the defined relationship of the object relative position, three-dimensional coordinates can be obtained by space resection through single photo. The principle of this method is simple but practical, especially suitable for measuring the overall mobile objects. Experiments show that within1500mm, plane normal direction is better than 0.02°in the measurement accuracy , and can replace stereopair measurement in certain conditions for its higher measurement accuracy.
Photogrammetry technology is used in the automatic deformation monitoring of foundation pit firstly and method proposed to reflect the deformation with the differences of two direction of monitoring points in the image plane. The method combined with the basic principle of photogrammetry, unified the spot observation data under monitoring camera coordinate system to calculate, simple and quick. Experiment shows that, the accuracy in X direction (horizontal direction along the pit) is superior to sub-millimeter and Z direction (the vertical direction in the pit) could achieve sub-millimeter, which can completely meet the needs of the deformation monitoring.
Based on multi-thread technology, completed a set of real-time dynamic measurement system apply on binocular vision principle. Real time measurement require of system efficiency higher, multithreaded programming can greatly improve the efficiency of program. Binocular dynamic real-time detection is based on closed-loop control system, puts forward a multithreaded programming technology which is based on the binocular vision high-speed dynamic measurement method. The data acquisition, processing, display are using multithreading technology.
The attitude information is indispensable to realize the full range of navigation part. Besides, in aerial remote sensing, photogrammetry and laser scanning, we can get exterior orientation elements by attitude of device. Based on Picard solving quaternion differential equation realized the real-time dynamic attitude matrix updating and attitude solution. Comparison of IMU three axis output, calculation error of heading is 0.036183°, pitch is 0.007969° and roll is 0.009627°. Finally, verify the feasibility and stability of Picard solving attitude.
According to the basic principle of GPS and the characteristics of inclinometer in measuring angle, this paper proposed a new method based on the combination of double GPS with inclinometer to measure the rotation parameters of coordinate transformation. Firstly, model coordinate system is established which associated with the GPS and inclinometer, then the three rotation angles between model coordinates system and Station Local Cartesian Coordinate System (SLCCS) can be get by biaxial inclinometer output and the projection of double GPS coordinates in the SLCCS. Experiment shows that, the method is simple, fast, effective, and accuracy fully meets the engineering measurement needs. Compared with the common points conversion method, this method has great improvement in the aspects of accuracy, efficiency etc..
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.