Patent ID: 8289415
Filing Date: 2012-10-16
Classification: G06K

Abstract:
1. A blink signal detection circuit comprising: a plurality of storage media that record image information shot by an imaging device at respective times, the image information showing a light-dark change in brightness of a measurement target which is blinking; an image information enlargement unit that enlarges a plurality of pieces of image information at the respective different times with reference to a spatial axis, thereby generating a plurality of pieces of enlarged image information at the respective different times; and a correlation detection unit that performs correlation detection between the plurality of pieces of enlarged image information at the respective different times, wherein: the circuit detects a blink signal of the measurement target from a result of correlation detection obtained by the correlation detection unit; and the image information enlargement unit generates the enlarged image information by performing information conversion on information on peripheral pixels based on information on a target pixel, the peripheral pixels lying in a peripheral area of the target pixel among pixels constituting the image information, the target pixel showing tone information when the light-dark change in the brightness of the measurement target is in a light state.