An information processing device comprising: a scan optical component which emits an electromagnetic ray while changing an emitting direction thereof; an absorber which is arranged in a predetermined emitting direction and which absorbs the electromagnetic ray; a receiving unit which receives, through the scan optical component, a reflective ray that is the electromagnetic ray reflected by an object; a first estimation unit configured to estimate a first noise signal based on an output signal of the receiving unit generated in an emitting period when the emitting direction by the scan optical component is the predetermined emitting direction; a second estimation unit configured to estimate a second noise signal, which is generated due to reception of background light, which is generated through the irradiation of the object by the sun, by the receiving unit, based on the output signal of the receiving unit generated in a pre-trigger period when the electromagnetic ray is not emitted, and a processing unit configured to process the output signal of the receiving unit based on the first noise signal and the second noise signal, wherein the second estimation unit estimates the second noise signal based on: the output signal of the receiving unit generated in the pre-trigger period when the emitting direction by the scan optical component is the predetermined emitting direction; and the output signal of the receiving unit generated in the pre-trigger period when the emitting direction by the scan optical component is a target emitting direction for detection of the object. a scan optical component which emits an electromagnetic ray while changing an emitting direction thereof; an absorber which is arranged in a predetermined emitting direction and which absorbs the electromagnetic ray; a receiving unit which receives, through the scan optical component, a reflective ray that is the electromagnetic ray reflected by an object; a first estimation unit configured to estimate a first noise signal based on an output signal of the receiving unit generated in an emitting period when the emitting direction by the scan optical component is the predetermined emitting direction; a second estimation unit configured to estimate a second noise signal, which is generated due to reception of background light, which is generated through the irradiation of the object by the sun, by the receiving unit, based on the output signal of the receiving unit generated in a pre-trigger period when the electromagnetic ray is not emitted, and a processing unit configured to process the output signal of the receiving unit based on the first noise signal and the second noise signal, wherein the second estimation unit estimates the second noise signal based on: the output signal of the receiving unit generated in the pre-trigger period when the emitting direction by the scan optical component is the predetermined emitting direction; and the output signal of the receiving unit generated in the pre-trigger period when the emitting direction by the scan optical component is a target emitting direction for detection of the object. the output signal of the receiving unit generated in the pre-trigger period when the emitting direction by the scan optical component is the predetermined emitting direction; and the output signal of the receiving unit generated in the pre-trigger period when the emitting direction by the scan optical component is a target emitting direction for detection of the object.