Abstract: There is provided a medical observation device that includes an imaging unit (200) that can image an environment inside an abdominal cavity of a living body, and the imaging unit includes a plurality of first pixels (302) that are aligned in a matrix, and an event detection unit (308) that detects that a luminance change amount of light incident on each of the plurality of first pixels exceeds a predetermined threshold.

Abstract: There are provided a wiper control method and a wiper control device in which unnecessary wiping operation is not performed. When a fixed amount of water passing through a detection area 4, the water being carried by the wiping operation of a wiper 5b, is detected, the presence of impact of a raindrop on the detection area 4 is judged. When there is no impact of a raindrop on the detection area 4, it is judged that water that is carried by the wiper 5b and passes through the detection area 4 is caused by a factor other than rainfall, and control is carried out to decrease the frequency of wiping operation of the wiper.

Abstract: A signal processing method and a signal processing device are provided in which a signal obtained from an object as an input signal, a time lag signal is generated from the input signal, a difference between the input signal and the time lag signal, and the generation of the difference is detected, so that a portion of the object at a position where the difference is generated is featured.

Abstract: In a rain sensing device, a sensing device that can estimate the size of raindrops or the like without a large amount of hardware resources, and its sensing method, and a wiper controlling apparatus using the same can be provided. In a sensing device, light emitted from a light-emitting member is introduced to a transparent plate, reflected by a sensing surface of the transparent plate and then received by a photo-detector, thereby detecting a condition of the sensing surface.

Abstract: There are provided a wiper control method and a wiper control device in which unnecessary wiping operation is not performed. When a fixed amount of water passing through a detection area 4, the water being carried by the wiping operation of a wiper 5b, is detected, the presence of impact of a raindrop on the detection area 4 is judged. When there is no impact of a raindrop on the detection area 4, it is judged that water that is carried by the wiper 5b and passes through the detection area 4 is caused by a factor other than rainfall, and control is carried out to decrease the frequency of wiping operation of the wiper.

Abstract: In a rain sensing device, a sensing device that can estimate the size of raindrops or the like without a large amount of hardware resources, and its sensing method, and a wiper controlling apparatus using the same can be provided. In a sensing device, light emitted from a light-emitting member is introduced to a transparent plate, reflected by a sensing surface of the transparent plate and then received by a photo-detector, thereby detecting a condition of the sensing surface.

Abstract: A signal processing method and a signal processing device are provided in which a signal obtained from an object as an input signal, a time lag signal is generated from the input signal, a difference between the input signal and the time lag signal, and the generation of the difference is detected, so that a portion of the object at a position where the difference is generated is featured.

Abstract: An object sensor and object sensing method that sense the status of the sensing surface by detecting a dynamic impact of a rain drop, not by comparing the signal with a reference value. An object sensor sensing the status of a sensing surface by detecting a light with a photo detector, which light has been emitted by a photo emission element and reflected on the sensing surface, comprises: a means for generating a time lag signal from the output signal of the photo detector; a means for calculating a differential signal between the output signal of the photo detector and the time lag signal; and a means for judging the status of the sensing surface by detecting the generation of the differential signal.

Abstract: An object sensor and object sensing method that sense the status of the sensing surface by detecting a dynamic impact of a rain drop, not by comparing the signal with a reference value. An object sensor sensing the status of a sensing surface by detecting a light with a photo detector, which light has been emitted by a photo emission element and reflected on the sensing surface, comprises: a means for generating a time lag signal from the output signal of the photo detector; a means for calculating a differential signal between the output signal of the photo detector and the time lag signal; and a means for judging the status of the sensing surface by detecting the generation of the differential signal.