Stream vision: a digital imaging and display technology

William J. Mandl; Chyau N. Shen; John W. Yang

doi:10.1117/12.372680

6 December 1999 Stream vision: a digital imaging and display technology

William J. Mandl, Chyau N. Shen, John W. Yang

Proceedings Volume 3759, Infrared Spaceborne Remote Sensing VII; (1999) https://doi.org/10.1117/12.372680
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

On focal plane analog to digital conversion, A/D has matured to such an extent that large low power arrays are now being built. Recently Amain developed a cooled MWIR 640 X 480 staring focal plane array with an A/D at each pixel. The technology, MOSAD$CPY, Multiplexed OverSample A/D, allowed the placement of over 300,000 converters on the focal plane on 27 micron centers with 12 bits dynamic range. A unique one bit digital data format, Stream Vision$CPY, was generated on focal plane and transmitted directly to a Ferroelectric LCD for real time viewing of the IR scene. This data stream produces apparent gray to the eye by rapidly modulating the on/off density of the display pixel in concert with the corresponding pixel on the focal plane array. To correct for detector nonuniformity (NUC), a systolic array of parallel processing elements was developed that provided offset and gain correction while preserving the dynamic range of the Stream Vision data. The benefits of this new digital format is that no transformation is required for processing and displaying the image data and there is no analog electronics in the system. Compared to present displays using either PCM to analog or PCM to pulse width modulation. Stream Vision uses less electronics and substantially lower switching bandwidth for the equivalent dynamic range. This development was sponsored by Naval Air Warfare Center under a Phase II SBIR program.

Citation Download Citation

William J. Mandl, Chyau N. Shen, and John W. Yang "Stream vision: a digital imaging and display technology", Proc. SPIE 3759, Infrared Spaceborne Remote Sensing VII, (6 December 1999); https://doi.org/10.1117/12.372680

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KEYWORDS

Nonuniformity corrections

Analog electronics

Modulation

Staring arrays

Sensors

LCDs

Cameras

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