Image sensor, image signal processor and electronic device including the same

The present invention relates to an image sensor, an image signal processor, and an electronic device including the same. The image sensor includes: a plurality of operation blocks which supplies an image signal in response to an incident light; and a power supply block which selectively supplies power to one or more operation blocks among the operation blocks based on a selected operation mode or an operation section. According to the present invention, the image sensor, the image signal processor, and the electronic device including the same are able to perform an image recognition operation or a movement recognition operation at low power.