Fundamentals of Electronic Imaging Systems: Some Aspects of Image ProcessingImage processing is a fascinating applications area, not a fundamental science of sufficient generality to warrant studying it for its own sake. In this area, there are many opportunities to apply art and experience, as well as knowledge from a number of sciences and engineering disciplines, to the creation of products and processes for which society has an expressed need. Without this need, work in the field would be sterile, but with it, image processing can readily provide the interested scientist or engineer with a professioilal lifetime of challenging problems and corresponding rewards. This point of view motivates this book and has influenced the selection and treatment of topics. I have not attempted to 1 be encyclopedic; this service has already been performed by others. It will be noted that the word "digital" is not in the title of this book. While much of present-day image processing is implemented digitally, this work is not intended for those who think of image processing as a branch of digital signal processing, except, perhaps, to try to change their minds. Image gathering and image display, vital parts of the field with strong effects on image quality, are inherently analog, as are all of the channels and media now used, or likely to be used in the future, to record TV signals and to transmit them to the home. |
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Page 109
... blocks of 6 reach 0.82 bits / sample , quite close to the entropy limit of 0.75 bits / sample . As a rule of thumb , the blocks should be long enough so the highest probability is no greater than 0.5.2 It is obvious that block coding is ...
... blocks of 6 reach 0.82 bits / sample , quite close to the entropy limit of 0.75 bits / sample . As a rule of thumb , the blocks should be long enough so the highest probability is no greater than 0.5.2 It is obvious that block coding is ...
Page 115
... Block Coding . Another method of utilizing vertical correlation is to divide the page into two - dimensional blocks , using a single code per block [ 5.17 ] . If the probability of all possible patterns of black and white in the block ...
... Block Coding . Another method of utilizing vertical correlation is to divide the page into two - dimensional blocks , using a single code per block [ 5.17 ] . If the probability of all possible patterns of black and white in the block ...
Page 248
... block dimensions , then the transform coefficients are samples of the subband signals . Such filters tend to have higher sharpness but more blocking effects than occur with those having a larger region of support . In both cases , the ...
... block dimensions , then the transform coefficients are samples of the subband signals . Such filters tend to have higher sharpness but more blocking effects than occur with those having a larger region of support . In both cases , the ...
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Fundamentals of Electronic Imaging Systems: Some Aspects of Image Processing William F. Schreiber No preview available - 1993 |
Common terms and phrases
achieved adaptive modulation addition amplitude analog areas audio bandwidth baseband bits/pel bits/sample block cable camera channel capacity chrominance coding color compatible components compression data rate decoder density developed digital transmission display DPCM dynamic range effect efficiency electronic entropy error factor filters flicker format frame rate frequency response function halftone HD-MAC HDTV higher horizontal IEEE image quality improvement input interference interlace interpolation intersymbol interference light linear lines luminance Megabits/s method monochrome MUSE NTSC objects OFDM optical output PALplus picture quality possible printing problem produce progressive scanning proposed quadrature modulation quantization noise receivers reduced reproduction result sampling satellite scanning screen sensitivity sharpness shown in Fig single-frequency networks space spatial frequency spectral spectrum standard subbands subcarrier system design television system temporal terrestrial broadcasting threshold tone scale transcoding transmitted tristimulus values vertical resolution video signal viewers visible visual