Active Pixel image Sensor with Motion Detection

This 256x256 active pixel sensor (APS) is designed for consumer multimedia applications requiring low-cost, high-functionality, compact cameras capable of acquiring highquality images at video frame rates. This sensor allows random access of the image data, permitting a simple implementation of electronic pan and zoom. Use in portable equipment is simplified by standard operatingvoltages andlow power (8OmW@5V, [email protected]). Fabrication in a standard CMOS process allows the integration of a variety of new and existing digital circuits with the image sensor. In addition, by making use of the implicit dynamic frame buffer provided by the active pixel structure, the sensor cangenerate a signal that represents the difference between sequential frames. This may be used for motion detection, image stabilization, and compression purposes.