Attitude Measurement Method Based On Projection Matching Study

The attitude angle, as one part of the exterior parameters of aircraft, has very importantfunction.It is extensively applied in many realms, such as flight test, satellite remote sensingand aerospace machine fixed position etc.Currently, the usual attitude angle instrumentscontain gyro, INS(Inertiao Navigation System), GPS, numerical compass and specialattitudes sensor. All of these measurements need to be installed in measured object.But inflight test and true wars, these sensors can’t be installed in measured objects. This thesis aimsat this problem, realizes processing and calculating of aircraft’s attitude angles throughuntouched image measurement technique.The paper’s main content is as follows, first expound the research condition of the aircraftattitude angle measurement, then detailedly analyzed the various principles of attitudemeasurement methods, image pretreatment before measuring attitude and the core content,attitude measurement based on projection matching. According to three dimension model ofmeasured object, projection mapping method from three dimesion to two dimension image,the course of the outlines calculate from true images and emulation images, outlines matchesand emulation of attitude data etc.. The main arithmetics and theories in the paper areimitated and experimented.In the end, the paper carried on the summary to this technique andapplication expectation.This text adopts the three dimension modeling, three dimension imitation and mapping, theprojection match etc. to achieve attitude angle measuring of the target.It overcame theweakness of the traditional method that according to the image characteristic of symmetry toanalyze and compute the attitude angle.(That method can’t process when the object iscomplex or unsymmetrical.) Three attitude angles can be measured through single camerauntouched. It has lowered the test cost and improved the test speed.