资料介绍
Analog_TVl Introduction l Analog TV systems l Progressive and interlaced systems l Synchronism signals l Composite signal l Components signal l NTSC and PAL systems l Sampling of the TV signal
1
Camera
Amplitude
Transmitter
0
Real world
Electrical signal
Visual system TV screen Receiver
2
Sclera
Vitreous humor Iris Cornea Lens Fovea
Aqueous humor
Retina
Optic nerve
Blind spot
Glare limit
0.01 Sensibility to contrast 0.02 0.05 0.1 0.2 0.5 1 1.5 2 3 4 6 8 12 16 24 Temporal frequency (Hz) 1 2 4 8
Subjective brightness
Adaptation range
(cy cle s/d egr ee)
Ba Bb
0.5
Spa tial fre que ncy
Scotopic
Scotopic threshold
Photopic
Log of intensity
3
Number of lines per image: Depends on desired vertical definition Number of images per second: No flicker > 50 Motion sensation > 15
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