부산대학교 도서관

A visualizing imitation system of typical intense X-ray radiation process which uses the Light Emitting Diode (LED) light source, the Liquid Crystal Display (LCD) panel, and the Charge Coupled Device (CCD) camera is proposed. Both the radiation processes of spot and wire array are investigated. First, two imitation devices are developed. A LED light producer is designed to imitate the spot source. A microcontroller is utilized for its output control. A LCD panel and a raspberry pi circuit are employed for the radiation imitation of wire array. Second, two radiation imitation methods are proposed. An exponential attenuation function and a particle system-based simulation are proposed. Third, a CCD camera is used to observe the imitation devices above, and many image datasets can be created. Because the shutter response speed of normal camera cannot reach to the change speed of the actual radiation source, a time-lapse capture technique is developed. Finally, some image features, including the statistic and the geometric metrics, are computed to evaluate the imitation effect. Many experiment results have shown the effectiveness of propose method. This system can help radiation researcher understand the transient radiation processes and study the initial image processing algorithms for them to some extent.