Single-chip imaging sensor
5 March 2008
Opto-Electronics
STMicroelectronics has introduced an ultra-small single-chip camera sensor for mobile applications. The VD6725 is a 2 Megapixel, 1/5-inch optical-format imaging sensor, with an active pixel array of 1600 x 1200 (UXGA), a high-performance image processor and camera control functions on a single chip. ST's latest developments in pixel defect correction, adaptive noise reduction and sharpness enhancement ensure that the embedded image signal processor delivers outstanding picture quality. Advanced anti-vignetting algorithms (balancing uneven illumination) and automatic white-balance control support excellent colour rendition in varying light conditions. The camera sensor is also able to identify and neutralise defective (dead) pixels that fail to sense light levels correctly. The sensor produces digital video streams at 15 fps at full UXGA resolution and 30 fps at VGA resolution. It supports fast context switching, which means that the sensor switches quickly from preview to capture mode, minimising the delay of the capture control.
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