The effect of under-exposure on the performance of gray scale projection algorithm is studied by synthetic and real video experiments.
通过合成视频实验探讨、实际视频实验论证相结合的研究方法，探讨曝光量不足对灰度投影算法性能的影响。
Results Optimal tube voltage and milliampere parameters of the full-length leg projection was acquired in terms of the distribution of spatial resolution under different parameters of exposure.
结果根据不同摄影参数下的空间分辨率分布情况，获取优化的CR下肢全长摄影的管电压和毫安量参数。
Plate projection system: a plat exposure system which works by projecting the image from microfilm or compact roll film rather than by the same-size one-to-one contact printing of films.
投影制版系统：用微摄菲林或小型卷筒菲林内的影像投射于印版上的晒版系统，有别于用原大菲林和接触晒印的方法。
Plate projection system: a plat exposure system which works by projecting the image from microfilm or compact roll film rather than by the same-size one-to-one contact printing of films.
投影制版系统：用微摄菲林或小型卷筒菲林内的影像投射于印版上的晒版系统，有别于用原大菲林和接触晒印的方法。
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