Fundamentals of Electronic Imaging Systems: Some Aspects of Image Processing |
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Page 16
... illumination . Note that at low frequencies , the curves merge , according to Weber's Law . The curves reach a peak when the adaptation time constant equals one half the period of the stimulus . The final high frequency limitation is ...
... illumination . Note that at low frequencies , the curves merge , according to Weber's Law . The curves reach a peak when the adaptation time constant equals one half the period of the stimulus . The final high frequency limitation is ...
Page 23
... illumination on direct viewing . Color slides , however , in which the effect is increased by high contrast and film deficiencies , are sometimes disappointing for this reason . The appearance of scenes is greatly influenced by the ...
... illumination on direct viewing . Color slides , however , in which the effect is increased by high contrast and film deficiencies , are sometimes disappointing for this reason . The appearance of scenes is greatly influenced by the ...
Page 30
... illumination is Gaussian rather than uniform . This produces a Gaussian3 profile in the image plane , whose " width " is inversely propor- tional to the " width " of the aperture illumination . For example , if I ( r ) = A exp 1 HOT 1 1 ...
... illumination is Gaussian rather than uniform . This produces a Gaussian3 profile in the image plane , whose " width " is inversely propor- tional to the " width " of the aperture illumination . For example , if I ( r ) = A exp 1 HOT 1 1 ...
Contents
Introduction | 1 |
Light and Optical Imaging Systems | 20 |
1 | 54 |
Copyright | |
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Common terms and phrases
achieved aliasing amplitude analog aperture average bandwidth baseband bits per sample bits/pel bits/sample block camera tube channel channel capacity coding systems color companding contours contrast curve display DPCM dynamic range edge points effect efficiency electronic entropy entropy coding error example exposure flicker flux Fourier frequency response function Gaussian graphics halftone harmonics illumination image processing impulse response input intersymbol interference lens letterpress light linear log2 low-pass filter lumen luminance methods modulation moiré patterns motion rendition nonlinear object optical system output Paper Density photons picture plate possible printing produce pseudorandom noise pulse quantization noise random repeating area reproduction resolution result sampled signal sampling density scanners scanning screen signal sensitivity sharpening sharpness shot noise shown in Fig spatial frequency spectral spectrum statistical steradian surface techniques temporal tone scale transform transmission transmitted two-dimensional vertical video signal visual wavelength