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The developing of photon counting detectors makes it is feasible to obtain multi energy information from one X-ray source. Based on the photon counting system, this paper proposes a simulation of multi energy BMD method, which can lead to the promotion of current BMD accuracy as well as providing multi information of human tissue. In our simulation, we generalize the conic surface equation fitting...
In this paper, we focus on camera calibration problem of circular markers. We propose the iterative method to calculate the coordinates of tangency points, and then get the camera parameters due to the imaging model. To reduce the error, we preprocess the original image using loG edge Detection. At last, we simulate and test this method. The results show that the method has a higher accuracy.
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