Television – Camera – system and detail – Combined image signal generator and general image signal...
Reexamination Certificate
2005-08-09
2005-08-09
Garber, Wendy R. (Department: 2612)
Television
Camera, system and detail
Combined image signal generator and general image signal...
C348S297000
Reexamination Certificate
active
06927793
ABSTRACT:
The method for forming an image with a wide dynamic range makes use of an image sensor containing subsets of pixels that can be individually reset. After an initial reset (21), a pixel or row of pixels is exposed (22) for a first time interval and the gray value(s) (Plong(255)) are read out (23) and stored (24). The pixel or row of pixels is then reset (25) and exposed (26) for a second, shorter time interval. The second gray value(s) (Pshort(255)) is/are read out (27) and either stored or immediately combined (28) with the first gray value(s) (Plong(255)) by means of a merging function (ƒ). The merging function (ƒ) ensures a monotonic, smooth change in output from the lowest to the highest gray values. The procedure is repeated for all pixels or rows of pixels in the image sensor, thus obviating the need for the storage of complete images. The method reduces temporal aliasing to a minimum and eliminates spatial aliasing.
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Aizawa K et al: “Computational Image Sensor for on Sensor Compression” IEEE Transactions on Electron Devices, vol. 44, No. 10, Oct. 1997, pp. 1724-1730, XP000703886.
Blanc Nicolas
Lang Graham K.
Seitz Peter
CSEM - Centre Suisse d'Electronique et de Microtechnique SA
Garber Wendy R.
Oppedahl & Larson LLP
Wilson Jacqueline
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