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Since traditional criteria for window design, e.g. the daylight factor, have lost their force, interest in re-evaluating the function of windows has been growing rapidly. The concept of spaciousness as an alternative criterion is introduced, and observations in scale models differing in spaciousness under an artificial sky have been carried out. From these, spaciousness for different sky luminances has been shown to be a function of interior illuminance, room size and window size. Observations in full scale interiors were also made to confirm the validity of the results. From additional experiments, it has been found that a lower limit of just acceptable spaciousness does exist. This would be a useful criterion for use in design.

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A fast and accurate algorithm for computing color gamuts has been developed. In the form presented here for illustration, color gamuts are computed from the dye amounts of subtractive color mixtures. Based on the one‐to‐one correspondence between dye amount space and color space, the simple four‐step algorithm performs a boundary search in dye amount space and a map over to color space. Application to block dyes and commercial reversal film dyes on a desktop computer demonstrates the algorithm's validity, accuracy, applicability, and exceptional speed. © 1993 John Wiley & Sons, Inc.

No abstract