| A variety of evidence in the crime scenes is very important.Measuring object of the crime scenes accurately is the basic means of collecting all kinds of evidence.Therefore,it is of great significance for the police to keep the information of the crime scenes and to carry out the threedimensional measurement.According to the actual needs of the investigation in the crime scenes for the police,this article obtained the images of the crime scenes by fisheye camera.It processed and analyzed these images to get the panoramic image,and measured the sizes of the objects in the crime scenes.The main work and innovation are as follows:Firstly,do measurement on the panoramic image.Get the images of the crime scenes by fisheye camera.Because of the large viewing angle,the fisheye camera can get much more information of the crime scenes than the normal one.It can get panoramic image form several images.The fisheye camera rose 20 cm vertically,and got two panoramic images of the same scene from different perspectives.Applying the triangulation principle,it can obtain the sizes of the objects in the crime scenes.Secondly,in the study of the basic knowledge of binocular vision measurement system,it combined the binocular vision measurement system theory and the fisheye camera to put forward the research on 3D measurement technology based on fisheye camera.In the research,do the calibration experiments of the fisheye camera to get the internal parameters and external parameters.Then apply the spherical coordinate projection methods to get the Corrected image.Do some study and analysis on the methods of detecting feature points and matching images,after that,do image mosaic and fusion to get the panoramic images,and do stereo matching on the panoramic images.Solve the pixel coordinates of the selected points and the points to be matched.Finally,the least square method is used to obtain the coordinates of the spatial points.Obtain the three-dimensional information of the spatial objects. |
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