An image sensor operable to vary the output spatial resolution according to a received light level while maintaining a desired signal-to-noise ratio. Signals from neighboring pixels in a pixel patch with an adjustable size are added to increase both the image brightness and signal-to-noise ratio. One...http://www.google.ca/patents/US5909026?utm_source=gb-gplus-sharePatent US5909026 - Integrated sensor with frame memory and programmable resolution for light adaptive imaging
