随着数码相机的普及和越来越便宜(甚至免费)、以及大量图片网站的存在，越来越多的人开始在演示的时候使用图片。
As digital cameras have become ubiquitous, and cheap (or free) photo websites plentiful, more people than ever are using images in presentations.
如今，随着数码相机、数码摄像机等数码设备的普及，又一次迎来了图像增强技术的研究浪潮。
Nowadays, with the prevalence of digital Cameras, digital Videocon and other digital devices, a tidal wave of image enhancement techniques comes forth for a second time.
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