Abstract: An optical information detection method includes: acquiring a first image captured by a first imaging device, wherein the first image comprises a target full-field projection pattern; extracting features from the first image to obtain first feature information; acquiring second feature information and first graphic information of a reference full-field projection pattern, wherein the first graphic information comprises zero-order information and/or secondary information; calculating a first mapping relationship between the first feature information and the second feature information; mapping the first graphic information to the target full-field projection pattern according to the first mapping relationship, to obtain second graphic information corresponding to the target full-field projection pattern; and calculating target optical information according to the second graphic information.

Abstract: An optical information detection method includes: acquiring a first image captured by a first imaging device, wherein the first image comprises a target full-field projection pattern; extracting features from the first image to obtain first feature information; acquiring second feature information and first graphic information of a reference full-field projection pattern, wherein the first graphic information comprises zero-order information and/or secondary information; calculating a first mapping relationship between the first feature information and the second feature information; mapping the first graphic information to the target full-field projection pattern according to the first mapping relationship, to obtain second graphic information corresponding to the target full-field projection pattern; and calculating target optical information according to the second graphic information.

Abstract: A relay lifter comprises a hook switch unit for turning ON/OFF a hook switch in response to a talk switch, a voice switching unit for switching connection of an aural signal in said corded telephone set between a transmitter/receiver of said corded telephone set and a cordless telephone set, and a bell sound detection signal transfer unit, a bell sound is outputted from said cordless telephone set when a bell sound is detected and an incoming call is accepted, a hook switch is turned ON/OFF using a hook switch ON/OFF unit, and connection of an aural signal in said corded telephone set is switched to said cordless telephone set for transmitting and receiving voice using said cordless telephone set.

Abstract: The is provided by the present invention a telephone system with high versatility comprising a corded telephone set, a cordless telephone set, and a relay lifter, wherein said relay lifter comprises a hook switch unit for turning ON/OFF a hook switch of the corded telephone set according to a first control signal responding to the talk switch, and a voice switching unit for switching connection of an aural signal in the corded telephone set according to a second control signal between a transmitter/receiver of the corded telephone set and the cordless telephone set, and switches connection of an aural signal in the corded telephone set to the cordless telephone set using the voice switching unit to transmit or receive voice using the cordless telephone set.