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US4365304A
Expired / Lapsed
US
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Method and apparatus for on-line data enhancement
Assignee: Yeda Research and Development Co Ltd
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Filing: 1980-07-16
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Granted: 1982-12-21
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Expires: 2000-07-16
Abstract
Abstract Apparatus for on-line data enhancement including apparatus for receiving data, apparatus for applying a histogram transformation to the received data including a look-up table embodied in a rewritable memory; apparatus for determining the histogram transformation in response to a histogram of the received data; and apparatus for producing a histogram of the received data.
Inventors
- 👤 Smil Ruhman
- 👤 Zvi Orbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:53
CPC Classifications
G; G06; G06T; G06T5/00; G06T5/40; G06T5/90; G06T5/92
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
71 words
Apparatus for on-line data enhancement comprising: means for receiving input data; means for gathering a histogram of said input data; means for providing a histogram transformation function operative to convert said input data to output data having a desired one of a plurality of selectable output histograms, said plurality of selectable output histograms including non-flat histograms; and a look up table for applying said histogram transformation function to said input data.
Claim 2
Dependent Claim
71 words
Apparatus for on-line data enhancement comprising: means for receiving input data; means for gathering a histogram of said input data; means for providing a histogram transformation function operative to convert said input data to output data having a desired one of a plurality of selectable output histograms, said plurality of selectable output histograms including non-flat histograms; and a look up table for applying said histogram transformation function to said input data.
Claim 3
Dependent Claim
12 words
Apparatus according to claim 1 and wherein said data comprises image data.
Claim 4
Dependent Claim
82 words
Apparatus according to claim 2 and also comprising controllable means for selectably determining what portion of the input data is subject to transformation and selectable bypass means for bypassing said look-up table, said controllable means producing an output signal to said bypass means for defining a selectable window extending over at least part of an image, within which window image data is subject to transformation and outside of which window image data is not subject to transformation and bypasses said look-up table.
Claim 5
Dependent Claim
40 words
Apparatus according to claim 3 and wherein said means for selectably determining also determines what portion of the image data is used for determining the histogram transformation function and provides an output signal indicating said window to said providing means.
Claim 6
Dependent Claim
16 words
Apparatus according to claim 1 and wherein said look-up table is embodied in a rewritable memory.
Claim 7
Dependent Claim
23 words
Apparatus according to claim 1 and wherein said means for providing said histogram transformation function comprises means for periodically updating said transformation function.
Claim 8
Dependent Claim
27 words
Apparatus according to claim 1 and wherein said means for providing comprises means for sampling said received data and basing said histogram transformation function on said sampling.
Claim 9
Dependent Claim
16 words
Apparatus according to claim 1 and also comprising microprocessor control apparatus for governing the operation thereof.
Claim 10
Dependent Claim
16 words
Apparatus according to claim 1 and wherein said providing means also comprises means for data compression.
Claim 11
Dependent Claim
16 words
Apparatus according to claim 1 and wherein said providing means also comprises means for adaptive quantization.
Claim 12
Dependent Claim
16 words
Apparatus according to claim 1 and wherein said providing means also comprises means for bit truncation.
Claim 13
Dependent Claim
13 words
Apparatus according to claim 1 and wherein said data is video image data.
Claim 14
Dependent Claim
25 words
Apparatus according to claim 1 and wherein said means for gathering includes selectably operable means for gathering a histogram over a selectable number of fields.
Claim 15
Independent Claim
86 words
A method for applying a histogram transformation to received data comprising the steps of: receiving input data; gathering a histogram of said input data; providing a histogram transformation function operative to convert said input data to output data having a desired one of a plurality of selectable output histograms, said plurality of selectable output histograms including non-flat histograms; inserting said histogram transformation function into a look-up table embodied in a rewritable memory; and applying said input data to said look-up table for desired histogram transformation thereof.
Claim 16
Independent Claim
86 words
A method for applying a histogram transformation to received data comprising the steps of: receiving input data; gathering a histogram of said input data; providing a histogram transformation function operative to convert said input data to output data having a desired one of a plurality of selectable output histograms, said plurality of selectable output histograms including non-flat histograms; inserting said histogram transformation function into a look-up table embodied in a rewritable memory; and applying said input data to said look-up table for desired histogram transformation thereof.
Claim 17
Dependent Claim
16 words
A method according to claim 14 and also comprising the step of compressing the input data.
Claim 18
Dependent Claim
18 words
A method according to claim 14 and also comprising the step of truncating bits of said input data.
Claim 19
Dependent Claim
27 words
A method according to claim 14 and also comprising the step of limiting the application of the histogram transformation to a selected portion of the received data.
Claim 20
Dependent Claim
13 words
A method according to claim 14 and wherein said data is image data.
Claim 21
Dependent Claim
14 words
A method according to claim 14 and wherein said data is video image data.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-20 | 1986-06-21 | 1986-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-20 | 1990-06-21 | 1990-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-20 | 1994-06-21 | 1994-12-21 | $7700.00 | Window Closed / Lapsed |