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印刷图像处理. 上海理工大学 —— 出版印刷学院 樊丽萍 [email protected]. 成绩评定方式. 教材 :. 印刷图像处理 —— 印刷工业出版社. 参考书 :. 1. 数字图像处理 —— 电子工业出版社. 2.MATLAB 图像处理 —— 电子工业出版社. 3. 印刷图像处理 —— 上海科学技术出版社. 使用软件 :. Adobe Photoshop 、 MATLAB. 第三章 图像的编码与压缩. 一、基本概念. 1.图像压缩的发展. 带宽压缩 (模拟方法). 数字压缩. 2. 数据压缩. 压缩标准. - PowerPoint PPT Presentation
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**
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15%215%20%50%
**::1.2.MATLAB 3.:Adobe PhotoshopMATLAB
** 2.1.
** n1 n2RDCRn1=n2,CR =1,RD =0 n2n1,CR0,RD -
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rk12r0=00.190003112r1=1/70.250013102r2=2/70.210103012r3=3/70.1601130013r4=4/70.08100300014r5=5/70.061013000015r6=6/70.0311030000016r7=10.0211130000006
-
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** 234,223,231,238,235 234,-11, 8, 7, -3
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**1. A. B. C. D. 2 . A. CT B. C. D. GIS3.100,120,140,160..100,20,20,20.., A. B. C. D.
**4. A. B. C. D.5. A. B. 6. 100*1008bit20000bit A.2:1 B.3:1 C.4:1 D.1:2
**.1.Entropy
** :
**1.a2a6a1a4a3a50.40.30.10.10.060.04
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0.40.30.10.10.060.040.40.30.10.10.10.40.30.20.10.40.30.3
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0.60.4
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0.60.4
0101010101a2=1a2a6a1a4a3a5
0.40.30.10.10.060.040.40.30.10.10.10.40.30.20.10.40.30.3
0.60.4
0101010101a6=00a2a6a1a4a3a5
0.40.30.10.10.060.040.40.30.10.10.10.40.30.20.10.40.30.3
0.60.4
0101010101a1=011a2a6a1a4a3a5
0.40.30.10.10.060.040.40.30.10.10.10.40.30.20.10.40.30.3
0.60.4
0101010101a4=0100a2a6a1a4a3a5
0.40.30.10.10.060.040.40.30.10.10.10.40.30.20.10.40.30.3
0.60.4
0101010101a3=01010a2a6a1a4a3a5
0.40.30.10.10.060.040.40.30.10.10.10.40.30.20.10.40.30.3
0.60.4
0101010101a5=01011a2a6a1a4a3a5
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** {xy}{1/32/3}NxNyxyxy1.58bit0.588bit,{xy}011y;
** : 0~101;
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abcd0.40.20.20.2
**(2) (3) 1d [0.8 1.0) (4) 2a[0.8 1.0)a[0.8 1.0)[0.0 0.4) StartN =0.8+0.0(1.0-0.8)=0.8 EndN=0.8+0.4(1.0-0.8)=0.88
**(5) 3c[0.8 0.88)c[0.8 0.88)[0.6 0.8) StartN =0.8+0.6(0.88-0.8)=0.848 EndN =0.8+0.8(0.88-0.8)=0.864 (6) 4b[0.848 0.864)b[0.848 0.864)[0.4 0.6) StartN =0.848+0.4(0.864- 0.848)=0.8544 EndN =0.848+0.6(0.864- 0.848)=0.8576
**(7) 5a[0.8544 0.8)a[0.8544 0.8576)[0.0 0.4) StartN =0.8544+0.0(0.85760.8544)=0.8544 EndN =0.8544+0.4(0.8576-0.86544)=0.85568{dacba}[0.8544 0.85568){dacba}[0.8544 0.85568){dacba}
**[0.8544 0.85568)[0.1101101010000110 0.1101101100001101)0.110110111101101111011011{dacba} 8/5=1.6 bit/
[ ] X = 1011 [ ] (1) 01Qe =1/4Pe = 1 Qe = 3/4.
(2) C A 0[0,1/4), 1[1/4, 1)
(3) [0, 1), C=0, A=1, C A1 1 0+1*1/4=1/4 1*3/4=3/4 2 0 1/4 3/4*1/4=3/163 1 1/4+3/16*1/4=19/64 3/16*3/4=9/644 1 19/64+9/64*1/4=85/256 9/64*3/4=27/256
01/4119/6485/25610117/16112/256
() C = ( 85/256)d = (0.01010101)b() C+A = (112/256) d = (0.01110000) b
0.011, 01141011011
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4485129
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3939393912612612612639-39256126-12625839-39-126260126-3925939-126257126126
**2. PCMPulse Code ModulationDPCMDifferential Pulse Code ModulationADPCMAdaptive Differential Pulse Code Modulation
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** AlphaLZWZIPJPEG ICC
**
** PostScriptEPS2.EPSEncapsulated PostScript.eps EPS JPEG ASC
** PhotoshopPage Setup PhotoshopPage Setup TransferICC
** EPSDesktop Color Separations)PS
** JPEGJoint Photographic Experts Group)3.JPEG.jpg Baseline ProcessExtended ProcessDCTSequential EncodingProgressive Encoding
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**
** PSD 450KBEPS 640KBTIFF 348KBGIF 64KBJPEG 38KBJPEG 56KB
**8 JPEG2000JPEG, RGBCMYKLabAlpha
** PDF4.PDF(Portable Document Format)PostScript PDFPSPS
** PDFICC JPEGLZWRun Length
**
** PDF/XPDFPDF/X-1CMYK p63PDF/X-2PDF/X-3
**5.SVGScalable Vector Graphics SVGXML/XML DOMW3C
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** 4 X = 10011 JPEG
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******MMMatorolaIntel**DE>254FE>32768(8000AldusTIFF1ASC1248
**Image Pyramid1987************DCT2(n-1)64,,.,.JPEG2000,.******JPEG2000JPEG********WebWebGIFJPEGSVGSVGJPEGGIFSVGWeb**