Abstract
One measurement of rotation angle about rotating object was proposed, it can realize precise and non-contact measurement. This measurement was executed as follow: firstly, select one image that it has abundant information, and the object which need rotation was pasted by this image. Secondly, when this object is begin to rotation, use CCD to collect the external images of the object before and after rotation respectively. Lastly, convert these two collected images from Descartes coordinate to polar coordinate, then calculate these two images in polar coordinate with phase correlation. The rotated angle was found by these steps. The result of this measurement experiment shows that this method can measure the rotated angle correctly. So this measurement method is worth to research and apply according to the theory and the experiment.
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