上海海事大学 Shanghal Maritime University 信号采样的实例 Sampling allows the use of modern digital electronics to process, record, transmit, store, and retrieve CT signals audio: MP3, CD, cell phone pictures: digital camera, printer video: DVD everything on the web 合U4X 信号与系统
X 信号采样的实例 信号与系统 Sampling allows the use of modern digital electronics to process, record, transmit, store, and retrieve CT signals. audio: MP3, CD, cell phone pictures: digital camera, printer video: DVD everything on the web
上海海事大学 Shanghal Maritime University Sampling Sampling is pervasive Example: digital cameras record sampled images I(a,y) 合U4X 信号与系统
X 信号与系统
上海海事大学 Shanghal Maritime University Sampling Photographs in newsprint are half-tone" images. Each point is black or white and the average conveys brightness 合U4X 信号与系统
X 信号与系统
上海海事大学 Shanghal Maritime University sampling Zoom in to see the binary pattern 信号与系统 合U4>X
X 信号与系统
上海海事大学 Shanghal Maritime University sampling Every image that we see is sampled by the retina, which contains g 100 million rods and 6 million cones(average spacing A 3um) which act as discrete sensors Sclera Choroid 少 Optic nerve Ciliary bod Courtesy of Helga Kolb, Eduardo Femandez and Ralph Nelson Used with permissio http://webvision.med.utah.edu/imageswv/sagschem.jpeg 信号与系统 合U4>X
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