Helicopter Landing Double Photogrammetry Algorithms And Dsp Digital Image Processing Technology

Based on the background of the "Ten-Five" Technology Project, this thesis introduced the design of the helicopter safely landing system design with Double CCD Photometry and technology of DSP digital image processing in detail.In this paper we made a systemic analysis and study of the accurate orientation technology in the process of helicopter landing-photogrammetry, made the model of using double CCD to measure the exact position of helicopter based Four Latent Points photogrammetry, educed formula about beaconing position, analyzed the computing error, and particularly computed the information of beaconing position of the helicopter's landing by experiment emulation. In the result, the error between a computed value and a measurement value was less than 5 centimeters. Moreover, this text showed a 3D emulated animation for the whole process of helicopter's landing with DCP. This paper is made up of 5 chapters, including as follows:The first chapter introduces the last development of helicopter's landing systems and opt electronic guiding equipments, contrasts recent technologies of opt electronic landing.Chapter 2 detailed introduces the principle and execution of DCP, discusses whether the way to directly calculate the equations is right from both on theory and practice, and studies the cause to position calculation error.Chapter 3 narrates the applied process concerning the technique of digital image processing and software and hardware system of DSP for image collection and calculation, and we try to debug the software and hardware.Chapter 4 describes the manufacture method of emulated animation showing system of helicopter landing process, helped to understand DCP livelier. The last chapter shows two experiment systems to validate the double CCD photometry program, the first system primarily makes use of computer software tool to verify it, the second system proves the photometry's accuracy according to experiment data and error result, and brings up a prospect for next work.This text provides a brief viable project for helicopters secure landing, and the accuracy of DCP is high, offers the important referenced value to develop the actual helicopter landing system.