1. An image capturing device, comprising: an electronic image sensor; a memory including a dark frame buffer that stores one or more dark frames generated by said electronic image sensor; and a processor communicating with said electronic image sensor and said memory, with said processor controlling said electronic image sensor to substantially continuously capture and store a newest dark frame from said electronic image sensor when said electronic image sensor is not performing an image capture and subtracting said newest dark frame from an image upon an image capture.