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Important Announcement Digital Cameras
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Image Transmission Over Wireless Networks
* Wireless networks
o Wireless technology
o Acoustic waves and electrical signals
o Radios
* Image capture and compression
o Inner-workings of a digital camera
o Manipulating & transforming a matrix of pixels
o Implementing a variant of JPEG compression
* Video over wireless networks
o Video compression and quality
o Transmitting video over wireless
o Controlling a car over a radio link
Traditional Photography
* A chemical process, little changed from 1826
* Taken in France on a pewter plate
* … with 8-hour exposure
The world’s first photograph
Image Formation in a Pinhole Camera
* Light enters a darkened chamber through pinhole opening and forms an image on the further surface
Aperture
* Hole or opening where light enters
o Or, the diameter of that hole or opening
* Pupil of the human eye
o Bright light: 1.5 mm diameter
o Average light: 3-4 mm diameter
o Dim light: 8 mm diameter
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Category : Digital CameraSource : www.cs.princeton.edu
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