INTERREFLECTION DETECTION DEVICE, INTERREFLECTION DETECTION METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To appropriately detect an area in which interreflection is occurring.SOLUTION: An interreflection detection device comprises: irradiating means that irradiates light of a sinusoidal wave pattern in which a frequency is variable; image acquisition means that acquires an image of an object irradiated by the light from the irradiating means; phase determination means that determines a phase for each position from the image; and detection means that detects an area in which interreflection is occurring. The detection means obtains a phase difference between the phase obtained from the image on which a low frequency sinusoidal wave pattern is irradiated and the phase obtained from the image on which a high frequency sinusoidal wave pattern is irradiated, for a combination of a plurality of low frequencies and high frequencies, and determines that the interreflection is occurring in the area in which the phase difference for any of the plurality of combinations is more than or equal to a threshold value.SELECTED DRAWING: Figure 7