Patent US842444A successfully refreshed from Google Patents.
Patent US5920652A successfully refreshed from Google Patents.
US5920652A
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US
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Method and apparatus for dividing an input image into a plurality of images of different frequency bandwidths
Assignee: Sony United Kingdom Ltd
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Filing: 1997-03-12
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Granted: 1999-07-06
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Expires: 2017-03-12
Abstract
Abstract A method and apparatus for processing an input image by converting an input frame of a predetermined number of pixels into a plurality of output frames, the spatial frequency spectrum of each of said plurality of output frames being that of a respective predetermined frequency band of the spatial frequency spectrum of the input frame, the processing including filtering the input frame in one direction so as to produce a first output frame of said predetermined number of pixels, the first output frame having only one of the high spatial frequencies and the low spatial frequencies of said input frame in said one direction, and subtracting said first output frame from said input frame so as to produce a second output frame of said predetermined number of pixels, the second output frame having the other of the high spatial frequencies and the low spatial frequencies of said input signal in said one direction.
Inventors
- 👤 James Hedley Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:57
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/60; H04N19/63; H04N5/00; H04N5/14
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
268 words
A method of processing an input image by converting an input frame of a predetermined number of pixels into a plurality of output frames, the spatial frequency spectrum of each of said plurality of output frames being that of a respective predetermined frequency band of the spatial frequency spectrum of the input frame, the method comprising: filtering the input frame in one direction so as to produce a first output frame of said predetermined number of pixels, the first output frame having only one of the high spatial frequencies and the low spatial frequencies of said input frame in said one direction; subtracting said first output frame from said input frame so as to produce a second output frame of said predetermined number of pixels, the second output frame having the other of the high spatial frequencies and the low spatial frequencies of said input signal in said one direction; filtering each of said first and second output frames in a direction perpendicular to said one direction so as to produce respectively third and fourth output frames of said predetermined number of pixels, the third and fourth output frames each having only one of the high spatial frequencies and the low spatial frequencies of said input frame in said perpendicular direction; and subtracting said third and fourth output frames from said first and second output frames respectively to produce fifth and sixth output frames of said predetermined number of pixels, the fifth and sixth output frames each having the other of the high spatial frequencies and the low spatial frequencies of said input signal in said perpendicular direction.
Claim 2
Independent Claim
268 words
A method of processing an input image by converting an input frame of a predetermined number of pixels into a plurality of output frames, the spatial frequency spectrum of each of said plurality of output frames being that of a respective predetermined frequency band of the spatial frequency spectrum of the input frame, the method comprising: filtering the input frame in one direction so as to produce a first output frame of said predetermined number of pixels, the first output frame having only one of the high spatial frequencies and the low spatial frequencies of said input frame in said one direction; subtracting said first output frame from said input frame so as to produce a second output frame of said predetermined number of pixels, the second output frame having the other of the high spatial frequencies and the low spatial frequencies of said input signal in said one direction; filtering each of said first and second output frames in a direction perpendicular to said one direction so as to produce respectively third and fourth output frames of said predetermined number of pixels, the third and fourth output frames each having only one of the high spatial frequencies and the low spatial frequencies of said input frame in said perpendicular direction; and subtracting said third and fourth output frames from said first and second output frames respectively to produce fifth and sixth output frames of said predetermined number of pixels, the fifth and sixth output frames each having the other of the high spatial frequencies and the low spatial frequencies of said input signal in said perpendicular direction.
Claim 3
Dependent Claim
44 words
A method of processing an input image comprising: repeating the method according to claim 1 using the output frame having the low spatial frequencies in said one and said perpendicular directions as the next input frame and using filtering with a lower cut-off frequency.
Claim 4
Dependent Claim
47 words
A method according to claim 1, wherein the filtering of at least one of the input frame, the first output frame, and the second output frame has a cut-off frequency of 2 -n times the Nyquist frequency of the input frame, where n is a positive integer.
Claim 5
Dependent Claim
31 words
A method according to claim 1, wherein the filtering of at least one of the input frame, the first output frame, and the second output frame is a low pass filtering.
Claim 6
Dependent Claim
39 words
A method according to claim 1, further comprising: selectively processing and filtering a respective one or ones of the first to sixth output frames; and reconstructing a processed and filtered input frame by summing processed and filtered output frames.
Claim 7
Dependent Claim
36 words
A method according to claim 1, further comprising: selectively processing or filtering respective one of the first to sixth output frames; and reconstructing a processed or filtered input frame by summing process or filtered output frame.
Claim 8
Independent Claim
276 words
An apparatus for processing an input image by converting an input frame of a predetermined number of pixels into a plurality of output frames, the spatial frequency spectrum of each of said plurality of output frames being that of a respective predetermined frequency band of the spatial frequency spectrum of the input frame, the apparatus comprising: means for filtering the input frame in one direction so as to produce a first output frame of said predetermined number of pixels, the first output frame having only one of the high spatial frequencies and the low spatial frequencies of said input frame in said one direction; means for subtracting said first output frame from said input frame so as to produce a second output frame of said predetermined number of pixels, the second output frame having the other of the high spatial frequencies and the low spatial frequencies of said input signal in said one direction; means for filtering each of said first and second output frames in a direction perpendicular to said one direction so as to produce respectively third and fourth output frames of said predetermined number of pixels, the third and fourth output frames each having only one of the high spatial frequencies and the low spatial frequencies of said input frame in said perpendicular direction; and means for subtracting said third and fourth output frames from said first and second output frames respectively to produce fifth and sixth output frames of said predetermined number of pixels, the fifth and sixth output frames each having the other of the high spatial frequencies and the low spatial frequencies of said input signal in said perpendicular direction.
Claim 9
Independent Claim
276 words
An apparatus for processing an input image by converting an input frame of a predetermined number of pixels into a plurality of output frames, the spatial frequency spectrum of each of said plurality of output frames being that of a respective predetermined frequency band of the spatial frequency spectrum of the input frame, the apparatus comprising: means for filtering the input frame in one direction so as to produce a first output frame of said predetermined number of pixels, the first output frame having only one of the high spatial frequencies and the low spatial frequencies of said input frame in said one direction; means for subtracting said first output frame from said input frame so as to produce a second output frame of said predetermined number of pixels, the second output frame having the other of the high spatial frequencies and the low spatial frequencies of said input signal in said one direction; means for filtering each of said first and second output frames in a direction perpendicular to said one direction so as to produce respectively third and fourth output frames of said predetermined number of pixels, the third and fourth output frames each having only one of the high spatial frequencies and the low spatial frequencies of said input frame in said perpendicular direction; and means for subtracting said third and fourth output frames from said first and second output frames respectively to produce fifth and sixth output frames of said predetermined number of pixels, the fifth and sixth output frames each having the other of the high spatial frequencies and the low spatial frequencies of said input signal in said perpendicular direction.
Claim 10
Dependent Claim
39 words
An apparatus according to claim 7, further comprising: means for providing the output frame having the low spatial frequencies in said one and said perpendicular directions as the input frame having means for filtering with a lower cut-off frequency.
Claim 11
Dependent Claim
52 words
An apparatus according to claim 7, wherein at least one of the means for filtering the input frame and the means for filtering each of said first and second output frames uses a cut-off frequency of 2 -n times the Nyquist frequency of the input frame, where n is a positive integer.
Claim 12
Independent Claim
39 words
An apparatus according to any one of claims 7, wherein at least one of said means for filtering the input frame and the means for filtering each of said first and second output frames comprises a low pass filter.
Claim 13
Dependent Claim
43 words
An apparatus according to claim 7, further comprising: means for selectively processing and filtering a respective one or ones of the first to sixth output frames; and means for reconstructing a processed and filtered input frame by summing processed and filtered output frames.
Claim 14
Dependent Claim
61 words
An apparatus according to claim 7, further comprising: means for providing the output frame having the low spatial frequencies in said one and said perpendicular directions as the input frame having means for filtering with a lower cut-off frequency which uses a cut-off frequency of 2 -n times the Nyquist frequency of the input frame, where n is a positive integer.
Claim 15
Dependent Claim
40 words
An apparatus according to claim 7, further comprising: means for selectively processing or filtering respective one of the first to sixth output frames; and means for reconstructing a processed or filtered input frame by summing processed or filtered output frames.
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) | 2002-07-05 | 2003-01-04 | 2003-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-07-05 | 2007-01-04 | 2007-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-07-05 | 2011-01-04 | 2011-07-06 | $7700.00 | Window Closed / Lapsed |