US Patent No: 4,882,629
Number of patents in Portfolio can not be more than 2000
Adaptive exposure control system
Stats
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Nov 21, 1989
Issued date -
Dec 9, 1988
filing date -
07/282,332
serial no -
Expired
status
Importance
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Abstract
An adaptive image acquisition system employing a hand-held optical scanner or camera is disclosed. The system includes an adaptive camera exposure control system to adjust the camera exposure time to the media's reflectivity characteristics. The system assembles a "film-strip" of images from compressed video data, wherein redundant image data appearing in successive image frames has been removed. The system employs a correlation process between successive frames to identify the redundant frame information and determine the camera velocity. By adapting the correlation process to the velocity of the camera, the effects of variations in the velocity may be substantially eliminated.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,402,088 OCR And bar code reading using area array | 25 | 1981 | |
| 4,408,344 OCR and Bar code reader using multi port matrix array | 31 | 1981 | |
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| 4,562,468 Adaptive predictive coding apparatus of television signal | 46 | 1983 | |
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| 4,760,464 Shading correction system for image scanning apparatus | 33 | 1987 | |
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| 4,551,717 Intelligent key display | 60 | 1982 | |