1 1. 1 1. 1. 1 image I(x,y,z,t) object to image 1. 1. 2 1
X Rays, Gamma-Rays, X Rays CT 1. 1. 3 INPUT Processing OUTPUT 1. 1. 4 Anolog Image Processing 2
25 / 1. 1. 5 Digital Image Processing Digitizing, : 3
Digitized picture element, or pixel: The smallest image-forming unit of a video display. Scanning Sampling Quantization Scanning ( Scanning Sampling ( Quantization ( ADC / DisplayingDigitizing Operation gray-scale resolution,,, 4
n 2 2 2 = 4 n 2 8 2 8 = 256 8 bit 2 8 = 256 12 bit 16 bit Contrast M N, M N 2 256 256, 512 512 n 1024 1024, 2048 2048 256 256 8 64kB ~ 524288b = 524kb 512 512 8 256kB 1024 1024 8 1MB 2048 2048 8 4MB N M 1024 x-ray 64 256kb 3240 2340 4 30Mb π y = Acos( x + ωt + ϕ) λ 2 5
1. 1. 6 100Mips : 512 512 8 bit 2048 2048 12 bit 1. 1. 7 6
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1. 1. 8 X-Y 1. 1. 9 10
2001 2000 IT 15 2012 1300 09 11 2002 MVC-4AVS, http://www.sbl.sh.cn/home.html MVC-4AVS 1 4 AVS401C 11
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3) (1) x 3.51/mm x 12 10s, 20s CCD /(R/F) 800mm x 13
(2)B (VGA) A/D B 14
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