有30亿部带摄像头的手机正在使用中,我们眼前充斥着可视化信息。摄像机比以往任何时候都更轻、更小、更便宜且无处不在,几乎任何人都能观看、创造、分享和摄录视频。摄像机的扩散正在改变我们的生活,其中最引人注目的是在执法领域。行车记录仪已经面市多年了,而且越来越受欢迎。奥巴马总统呼吁地方警察局开始让警官佩戴徽章摄像机。公民也有摄像机,通常是 There are 3 billion mobile phones with cameras in use, and we are now full of visual information. Cameras are lighter, smaller, cheaper and ubiquitous than ever before and almost anyone can watch, create, share and videotape. The proliferation of cameras is changing our lives, most notably in law enforcement. Tachographs have been around for many years and are becoming more and more popular. President Obama called on the local police to start putting police cameras on badges. Citizens also have video cameras, usually yes