Showing papers on "Quantization (image processing) published in 1979"
TL;DR: Results obtained indicate this two-dimensional image model is formulated using a seasonal autoregressive time series and could be used to code textures for low bit rates or be used in an application of generating compressed background scenes.
87 citations
TL;DR: Discusses the image compression technology where the aim is to narrow the transmitted band-width as much as possible to reduce the cost of transmission and for military use it reduces the susceptibility to interference.
Abstract: Discusses the image compression technology where the aim is to narrow the transmitted band-width as much as possible. Such compression reduces the cost of transmission and for military use it reduces the susceptibility to interference, but the problem is that the higher the compression, the greater the loss of image quality.
25 citations
TL;DR: A class of image representations that are appropriate for display of continuous-tone imagery with a wide range of digital devices is analyzed and Quantization and Fourier domain aliasing are shown to be important factors in the degradations introduced by the nonlinear display process.
Abstract: A class of image representations that are appropriate for display of continuous-tone imagery with a wide range of digital devices is analyzed. Special cases include pulse-amplitude modulation, ordered dither, and pulse-surface-area modulation. Quantization and Fourier domain aliasing are shown to be important factors in the degradations introduced by the nonlinear display process. The severity of these degradations may be minimized by proper design of the dot profile. Using a simple measure of image quality, the required information density and display resolution are calculated as a function of the number of display luminance levels for a well-known dot profile. Some experimental results are also presented.
20 citations
TL;DR: A natural generalization of two-dimensional digital pulsecode modulations has been used to handle the compression of images for human eyes only and shows that by ignoring the mean-square error (MSE) and wisely arranging the errors in the right place, a simple method can achieve very good results.
Abstract: A natural generalization of two-dimensional digital pulsecode modulations (DPCM) has been used to handle the compression of images for human eyes only. It shows that by ignoring the mean-square error (MSE) and wisely arranging the errors in the right place, a simple method can achieve very good results.
6 citations
01 Jan 1979
3 citations
01 May 1979
TL;DR: In this article, a number of image coding methods were implemented and applied to aerial reconnaissance photos for relative ranking evaluations by experienced photo-analysts, including two-dimensional transform, one-dimensional hybrid, and spatial.
Abstract: : In this study a number of image coding methods were implemented and applied to aerial reconnaissance photos for relative ranking evaluations by experienced photo-analysts. These coding methods were of three broad types: two-dimensional transform, one-dimensional hybrid, and spatial. The compression rates used were 1.6 and 0.5 bits/pixel. The effects of channel errors at a .001 error rate were also simulated and evaluated.
1 citations