Device, method, and computer readable medium for area identification using motion from a projected pattern

摘要

An area identifying device includes a projecting unit, an image capturing unit, a calculating unit, and an identifying unit. The projecting unit is configured to project a pattern so that the pattern performs a predetermined movement. The image capturing unit is configured to capture, in sequential order, multiple images of a projection area on which the pattern is projected, each image including a plurality of image areas. The calculating unit is configured to calculate an amount of change of pattern appearances for each image area in the multiple images. The identifying unit is configured to identify, as a reflective area, at least one image area having a different amount of change of the pattern appearances from a reference amount of change of the pattern appearances based on the predetermined movement, among the calculated amounts of change of the pattern appearances.

主权项

1. An area identifying device comprising:
a projecting unit configured to project a pattern so that the pattern performs a predetermined movement; an image capturing unit configured to capture, in time-sequential order, images of projection areas on which the pattern is projected; and a processor configured to execute a program to implement a calculating unit and an identifying unit,
the calculating unit being configured to calculate, based on pixel values of the images, an amount of change of pattern appearances for each of multiple image areas in the images, andthe identifying unit being configured to identify, as a spatial location of a reflective area of a physical item that has a constant reflectance ratio, at least one image area having a different amount of change of the pattern appearances from a reference amount of change of the pattern appearances based on the predetermined movement, among the calculated amounts of change of the pattern appearances.