Wireless data technologies reference handbook phần 8 pptx

... the range from 60 kHz to 5 .8 GHz depending on application. Wireless Data Technologies. Vern A. Dubendorf  2003 John Wiley & Sons, Ltd ISBN: 0-470 -84 949-5 LMDS 185 networks such as T3 connectivity ... technology. Wireless Broadband offers tremendous flexibility and improving performance but it does have some limitations. Wireless broadband uses radio spectrum, which Wireless...

Ngày tải lên: 09/08/2014, 19:22

... in data. Generic lossless compression algorithms, which assure the perfect reconstruction of the initial data, could be used for images and video. However, these algorithms only achieve a data ... functions (Kelly, 1979b; Burbeck and Kelly, 1 980 ; Kelly, 1 983 ). A variety of artifacts can be distinguished in a compressed video sequence (Yuen and Wu, 19 98) :  The blocking effect or blo...

Ngày tải lên: 09/08/2014, 19:21

... ARTIFACTS 127 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 0 10 20 30 40 50 60 70 80 Scene 1 Scene 2 Scene ... 6 Scene 7 Scene 8 Scene 9 Condition DMOS 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1...

Ngày tải lên: 09/08/2014, 19:21

... Specification 205 2 26-control multiframes 47 5 52-multiframe 47 8 802.11 81 80 2.11a 81 80 2.11b 81 80 2.15 102 80 2.16 1 58 802.3 81 A access grant channel (AGCH) 43 AiroPeek 141 AirSnort 142 AJ Anti-Jam ... 141 W-INFOSEC 187 , 188 , 190, 192, 194, 196, 1 98, 200, 202, 204 Wired Equivalent Privacy, see WEP Wireless Application Protocol, see WAP Wireless Guru xix Wireless Lo...

Ngày tải lên: 09/08/2014, 19:21

... Local Contrast 76 4.1.4 Filter Design 80 4.2 Perceptual Distortion Metric 82 4.2.1 Metric Design 82 4.2.2 Color Space Conversion 84 4.2.3 Perceptual Decomposition 86 4.2.4 Contrast Gain Control 91 4.2.5 ... techniques. 3. Imaging systems—Image quality. I. Title. TK6 680 .5.W55 2005 006.6 0 96–dc22 2004061 588 British Library Cataloguing in Publication Data A catalogue record for...

Ngày tải lên: 09/08/2014, 19:21

... 5 6 7 8 5 10 15 20 25 30 D/H Visual angle [deg] 2 3 4 5 6 7 8 5 10 15 20 25 30 35 40 D/H Resolution [cpd] HDTV (1 080 lines) HDTV (720 lines) PAL (576 lines) NTSC ( 486 lines) CIF ( 288 lines) ... components for the reference image and the distorted image are the basis for an estimate of image distortion. The first video quality metric was developed by Lukas and Budrikis (1 982 ). It...

Ngày tải lên: 09/08/2014, 19:21

... defined on the basis of the subjective data to provide a quantitative upper limit on prediction performance (VQEG, 2003). 0.75 0 .8 0 .85 0.9 0.95 1 0.75 0 .8 0 .85 0.9 0.95 1 Pearson linear correlation Spearman ... Fuhrmann et al. (1995), Jacobson (1995), Eriksson et al. (19 98) , Li et al. (19 98) , Martens and Meesters (19 98) , Mayache et al. (19 98) , and Avcibas ˛ et al. (2002). The...

Ngày tải lên: 09/08/2014, 19:21

... resolution). Table 4.2 Contrast gain control parameters bk pq W-B 6.9 68 0.297 78 2.11 58 2 R-G 21.904 0.11379 2.3447 2 B-Y 13.035 0.07712 2.2 788 2 98 MODELS AND METRICS 10 –1 10 0 10 1 –45 –40 –35 –30 –25 –20 –15 Spatial ... psychophysical data (dots). (a) Contrast sensitivity data for blue-yellow gratings from Mullen (1 985 ). (b) Contrast masking data for red-green gratings fro...

Ngày tải lên: 09/08/2014, 19:21

... 5 6 0. 78 0.79 0 .8 0 .81 0 .82 0 .83 0 .84 0 .85 0 .86 Minkowski summation exponent Correlation Pearson Spearman Pearson Spearman 0 20 40 60 80 100 0.7 0.72 0.74 0.76 0. 78 0 .8 0 .82 0 .84 0 .86 Histogram ... spatio-temporal mechanisms in the visual system. As discussed in 0.7 0.75 0 .8 0 .85 0.9 0.73 0.74 0.75 0.76 0.77 0. 78 0.79 0 .8 0 .81 Pearson linear correlation S...

Ngày tải lên: 09/08/2014, 19:21

... the sharpness rating alone is smaller than for the VQEG data. Together with the 0.65 0.7 0.75 0 .8 0 .85 0.9 0.7 0.72 0.74 0.76 0. 78 0 .8 0 .82 0 .84 0 .86 0 .88 0.9 Pearson linear correlation Spearman rank–order ... Modelfest image/threshold database into the spatio- temporal domain. In Proc. SPIE Human Vision and Electronic Imaging, vol. 4662, pp. 1 38 1 48, San Jose, CA. Carpenter...

Ngày tải lên: 09/08/2014, 19:21