Download Perception of Displayed Information by Lucien M. Biberman (auth.), Lucien M. Biberman (eds.) PDF

By Lucien M. Biberman (auth.), Lucien M. Biberman (eds.)

As this publication took shape, its contents provided the cloth for a graduate path on the collage of Rhode Island. towards the tip of that direction, the category reviewed the literature on demonstrate features and layout. The common feedback voiced in these experiences was once that there has been plenty of info yet no standards upon which you can still base a legitimate layout. notwithstanding you will examine all concerning the measurement and brightness of varied monitors, you'll now not shape any judgment approximately how ef­ fectively the exhibit transferred info to an observer. As I reviewed our approximately accomplished textual content, a statement crossed my table declaring that one of many expert societies in a seminar used to be to think about if one are not try to formulate a concept referring to info move from screens to an observer. That was once the 1st identify selected for our publication, ahead of our writer instructed us that "that used to be a paragraph, now not a name. " the gang of individuals to this booklet have worked lengthy within the conviction that there has been a true have to increase and current a consolidated thought dependent upon the paintings of a few pioneers, together with Barnes and Czerny, de Vries, Rose, Coltman and Anderson, Schade, Johnson, van Meeteren, and others, who proven many of the components of a considerable theoretical and experimental again­ floor that appeared ripe for consolidation.

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Sc. The arithmetical mean of threshold contrasts computed from individual probability curves, plotted as a function of adaptation brightness for seven stimulus areas. 'l Z 10 \ 1\ 1\ \ \ \ \ ~~ \\ f\... ~ ~ i'--.. \ '"..... 05 I '" ~ ;; 0 ..... o - ..... -05 -25 -20 ....... ~ '" ~ .......... t'i'--.. ~ ~ ~ ~ "-.. I'-....... ~ ......... 'l -1_030 "" '" ~~ ~ ""- - 15 ~~~ I i 100 '( I -10 -05 ........ )0- 1 0 05 10 15 lOG LIMINAL CONTRAST 10- 2 ........... I'-....... ~ 20 10- 3 25 t--- :----... 30 10- 4 35 10- 5 40 Fig.

Five appropriate stimulus contrasts were selected on the basis of preliminary observations. Both during preliminary observations and during the regular session, each of the stimuli was presented in random sequence an equal number of times. The five stimuli were detectable by the observers with varying probability. The largest stimulus contrast was usually detected with a probability of 95 percent and the smallest stimulus contrast, with a probability of 10 percent. Three additional stimuli were selected so that an adequate function relating probability of detection and stimulus contrast was obtained.

The shape of the spread function was held constant and was of the Gaussian form. Being Gaussian-shaped, the transfer functions are completely describable by one parameter. They selected that spatial frequency corresponding to a given modulation transfer factor. This is similar to the standard deviation of a normal distribution. They called it the characteristic frequency Vc (Fig. 7), discussed later. m-diameter scanning aperture. For their first experiment a series of 19 pictures was prepared with carefully controlled parameters of grain and MTF.

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