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Corner feature matching remains a difficult task for wide-baseline images because of viewpoint distortion, surface discontinuities, and partial occlusions. In this paper, we propose a robust Harris corner matching method based on the quasi-homography transform (QHT) and self-adaptive window. Our method is divided into three steps. First, high-quality Harris corners were extracted from stereo images...
In the reconstruction, the misaligned geometry will cause streak artifacts which influence image quality. Here we propose a method to calibrate all the parameters simultaneously with the matrix form. In some cases, the relative position between the X-ray source and the detector is known and invariant, and then we can build a Cartesian coordinate system for the source and the detector. At the same...
Circular cone-beam CT is one of the most popular configurations in both medical and industrial applications. The FDK algorithm is the most popular method for circular cone-beam CT. However, with increasing cone angle the cone-beam artifacts associated with the FDK algorithm deteriorate because the circular trajectory does not satisfy the data sufficiency condition. Along with an experimental evaluation...
In order to accelerate imaging process and lower overall system cost, many practical CT systems use single slice detectors and big-pitch helical scanning, especially in next generation Baggage Scanning system. Geometry shape detection is a very important function in this kind of systems. In this paper, we present an online 3D-plane detection solution for this kind of systems. We improved traditional...
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