灰度畸变 meaning in English

tonal distortion

But influenced by a great deal of factors in laser and only strong stability scanning as one again , for instance , the un - stability of laser instrument , inconsistency of decaying to the laser of every part , etc . in the scanner , can lead to the fact intensity of laser on piece fluctuate , cause , scan systematic formation of image quality drop finally
另外,又针对激光扫描系统中的由于扫描非线性等固有因素的存在,所导致扫描成像灰度畸变的现象,提出了一种利用数字补偿校正技术对固有因素进行激光光束光强的逐点补偿的新方法。本设计不仅适用于激光扫描系统,对于其它各个应用领域,都有参考价值。