The mask acts as a low frequency spatial filter whose effect is to enhance rendition of fine detail . 掩模就象一个低频空间滤波器,其效果是增强细节的重现。
Study and design of spatial filter in high power femtosecond laser system 高能飞秒激光系统中空间滤波器的研究和设计
Understanding the effects of motion correction and spatial filtering on the outcome of statistical analysis of fmri data 了解移动校正及空间滤波对功能性磁振造影资料统计分析结果的影响。
In the facet of pre - transact of ir image , the traditional smooth spatial filter and histogram equalization are analyzed and intruded first 论文在红外图像预处理方面,首先分析了传统的空间滤波技术,并着重介绍了平滑空间滤波器。
( 6 ) the spatial filter is introduced to avoid the damage from the hot - image . it is indicated by the numerical results that this work is valuable ( 6 )引入了空间滤波器抑制热像效应对光学元件造成的破坏,从数值模拟来看,这种方法是行之有效的。
A spatial filter is an optical device which uses the principles of Fourier optics to alter the structure of a beam of coherent light or other electromagnetic radiation. Spatial filtering is commonly used to "clean up" the output of lasers, removing aberrations in the beam due to imperfect, dirty, or damaged optics, or due to variations in the laser gain medium itself.