Simplified Human Visual MTF Measurements

概要

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This investigation concerns themeasurement method of the human visual MTF properties using a computer display. In this paper, simplified visual MTF measurement was discussed. This paper compares the simplified measurement with the more precise measurement which has been known as general measurement. The test pattern used in the simplified measurement was a grating which had horizontally varied spatial frequencies and vertically varied contrast values. The sensitivity obtained by the simplified measurement is extremely low and the curvature is tranquil compared with the results measured by the precise measurement. This result suggests the pattern must be improved because the lower contrast area is too narrow to obtain an accurate value on the pattern, Latter evidence suggests the subject observed several different spatial frequency gratings simultaneously in his one glance. Taking these into account, the improved pattern was developed. After the MTF properties measurement by the improved simplified MTF pattern, the original MTF properties (precise measurement MTF properties) were estimated.
社団法人照明学会の論文