Patent US5249015A successfully refreshed from Google Patents.
US5249015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exposure calculation device
Assignee: Nikon Corp
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Filing: 1992-08-26
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Granted: 1993-09-28
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Expires: 2012-08-26
Abstract
Abstract An exposure calculation device comprises: first composite photometered value calculation apparatus means for classifying areas of divisional photometering means to a first pattern and calculating a composite photometered value for each classified area based on the photometered values of the divisional photometering areas contained in each classified area; first exposure value calculation means for calculating a first exposure value based on the calculated composite photometered value; second composite photometered value calculation means for classifying the areas of the divisional photometering means to a second pattern and calculating a composite photometered value for each classified area based on the photometered values of the divisional photometering areas contained in each classified area; second exposure calculation means for calculating a second exposure value based on the calculated composite photometered value; contribution factor calculation means for calculating contribution factors of the first and second exposure values in accordance with a photographing condition; and third exposure value calculation means for combining the first exposure value and the second exposure value in accordance with the contribution factors calculated by the contribution factors calculation means to calculate an exposure value to control the exposure.
Inventors
- 👤 Tadao Takagi
- 👤 Hiroyuki Iwasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:19
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/099; G03B7/0993; G03B7/0997; G03B7/09971; G03B7/09976; G03B7/09979; H; H04; H04N; H04N23/00; H04N23/70; H04N23/71
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
228 words
An exposure calculation device comprising: divisional photometering means for photometering a plurality of divided areas of an object field to produce photometered outputs of the respective divisional photometering areas; first composite photometered value calculation means for classifying the areas of said divisional photometering means to a first pattern and calculating a composite photometered value for each classified area based on the photometered values of the divisional photometering areas contained in each classified area; first exposure value calculation means for calculating a first exposure value based on the composite photometered value calculated by said first composite photometered value calculation means; second composite photometered value calculation means for classifying the areas of said divisional photometering means to a second pattern and calculating a composite photometered value for each classified area based on the photometered values of the divisional photometering areas contained in each classified area; second exposure calculation means for calculating a second exposure value based on the composite photometered value calculated by said second composite photometered value calculation means; contribution factor calculation means for calculating contribution factors of the first and second exposure values in accordance with a photographing condition; and third exposure value calculation means for combining the first exposure value and the second exposure value in accordance with the contribution factors calculated by said contribution factor calculation means to calculate an exposure value to control the exposure.
Claim 2
Dependent Claim
228 words
An exposure calculation device comprising: divisional photometering means for photometering a plurality of divided areas of an object field to produce photometered outputs of the respective divisional photometering areas; first composite photometered value calculation means for classifying the areas of said divisional photometering means to a first pattern and calculating a composite photometered value for each classified area based on the photometered values of the divisional photometering areas contained in each classified area; first exposure value calculation means for calculating a first exposure value based on the composite photometered value calculated by said first composite photometered value calculation means; second composite photometered value calculation means for classifying the areas of said divisional photometering means to a second pattern and calculating a composite photometered value for each classified area based on the photometered values of the divisional photometering areas contained in each classified area; second exposure calculation means for calculating a second exposure value based on the composite photometered value calculated by said second composite photometered value calculation means; contribution factor calculation means for calculating contribution factors of the first and second exposure values in accordance with a photographing condition; and third exposure value calculation means for combining the first exposure value and the second exposure value in accordance with the contribution factors calculated by said contribution factor calculation means to calculate an exposure value to control the exposure.
Claim 3
Dependent Claim
46 words
An exposure calculation device according to claim 1, wherein said contribution factor calculation means calculates a difference between a maximum photometered value and a minimum photometered value of the divisional photometering areas as said photographing condition, and calculates the contribution factor in accordance with said difference.
Claim 4
Dependent Claim
40 words
An exposure calculation device according to claim 1, wherein said contribution factor calculation means detects a maximum photometered value of the divisional photometering areas as said photographing condition, and calculates the contribution factor in accordance with the maximum photometered value.
Claim 5
Dependent Claim
40 words
An exposure calculation device according to claim 1 wherein said contribution factor calculation means calculates a mean photometered value of the divisional photometering areas as said photographing condition and calculates the contribution factor in accordance with the mean photometered value.
Claim 6
Dependent Claim
28 words
An exposure calculation device according to claim 1 wherein said contribution factor calculation means calculates the contribution factor in accordance with a photographing distance as said photographing condition.
Claim 7
Dependent Claim
32 words
An exposure calculation device according to claim 1 wherein said contribution factor calculation means calculates the contribution factor in accordance with a focal distance of a photographing lens as said photographing condition.
Claim 8
Dependent Claim
32 words
An exposure calculation device according to claim 1 wherein said contribution factor calculation means calculates the contribution factor in accordance with a defocusing distance of a photographing lens as said photographing condition.
Claim 9
Dependent Claim
28 words
An exposure calculation device according to claim 1 wherein said contribution factor calculation means calculates the contribution factor in accordance with a photographing software as said photographing condition.
Claim 10
Dependent Claim
157 words
An exposure calculation means comprising: first divisional photometering means for photometering a first divisional pattern of an object field to produce a photometered value for each divisional photometering area; first exposure value calculation means for calculating a first exposure value based on the photometered values of said first divisional photometering means; second divisional photometering means for photometering a second divisional pattern of the object field to produce a photometered value for each divisional photometering area; second exposure value calculation means for calculating a second exposure value based on the photometered values of said second divisional photometering means; contribution factor calculation means for calculating contribution factors of the first and second exposure values in accordance with a photographing condition; and third exposure value calculation means for combining the first exposure value and the second exposure value in accordance with the contribution factors calculated by said contribution factor calculation means to calculate an exposure value to control the exposure.
Claim 11
Dependent Claim
157 words
An exposure calculation means comprising: first divisional photometering means for photometering a first divisional pattern of an object field to produce a photometered value for each divisional photometering area; first exposure value calculation means for calculating a first exposure value based on the photometered values of said first divisional photometering means; second divisional photometering means for photometering a second divisional pattern of the object field to produce a photometered value for each divisional photometering area; second exposure value calculation means for calculating a second exposure value based on the photometered values of said second divisional photometering means; contribution factor calculation means for calculating contribution factors of the first and second exposure values in accordance with a photographing condition; and third exposure value calculation means for combining the first exposure value and the second exposure value in accordance with the contribution factors calculated by said contribution factor calculation means to calculate an exposure value to control the exposure.
Claim 12
Dependent Claim
46 words
An exposure calculation device according to claim 9 wherein said contribution factor calculation means calculates a difference between a maximum photometered value and a minimum photometered value of the divisional photometering areas as said photographing condition, and calculates the contribution factor in accordance with said difference.
Claim 13
Dependent Claim
40 words
An exposure calculation device according to claim 9 wherein said contribution factor calculation means detects a maximum photometered value of the divisional photometering areas as said photographing condition, and calculates the contribution factor in accordance with the maximum photometered value.
Claim 14
Dependent Claim
40 words
An exposure calculation device according to claim 9 wherein said contribution factor calculation means calculates a mean photometered value of the divisional photometering areas as said photographing condition and calculates the contribution factor in accordance with the mean photometered value.
Claim 15
Dependent Claim
28 words
An exposure calculation device according to claim 9 wherein said contribution factor calculation means calculates the contribution factor in accordance with a photographing distance as said photographing condition.
Claim 16
Dependent Claim
32 words
An exposure calculation device according to claim 9 wherein said contribution factor calculation means calculates the contribution factor in accordance with a focal distance of a photographing lens as said photographing condition.
Claim 17
Dependent Claim
32 words
An exposure calculation device according to claim 9 wherein said contribution factor calculation means calculates the contribution factor in accordance with a defocusing distance of a photographing lens as said photographing condition.
Claim 18
Dependent Claim
28 words
An exposure calculation device according to claim 9 wherein said contribution factor calculation means calculates the contribution factor in accordance with a photographing software as said photographing condition.
Claim 19
Dependent Claim
136 words
An exposure calculation device comprising: first exposure value calculation means for dividing an object area into a first number of areas and calculating exposure values of the divisional areas; second exposure value calculation means for dividing the object area into a second number of areas smaller than the first number and calculating exposure values of the divisional areas; contribution factor calculation means for calculating a contribution factor in accordance with a photographing condition; third exposure value calculation means for combining an output of said first exposure value calculation means and an output of said second exposure value calculation means in accordance with the contribution factor calculated by said contribution factor calculation means to calculate an exposure value; and exposure control means for controlling the exposure by using an output of said third exposure value calculation means.
Claim 20
Dependent Claim
136 words
An exposure calculation device comprising: first exposure value calculation means for dividing an object area into a first number of areas and calculating exposure values of the divisional areas; second exposure value calculation means for dividing the object area into a second number of areas smaller than the first number and calculating exposure values of the divisional areas; contribution factor calculation means for calculating a contribution factor in accordance with a photographing condition; third exposure value calculation means for combining an output of said first exposure value calculation means and an output of said second exposure value calculation means in accordance with the contribution factor calculated by said contribution factor calculation means to calculate an exposure value; and exposure control means for controlling the exposure by using an output of said third exposure value calculation means.
Claim 21
Dependent Claim
172 words
An exposure calculation device comprising: divisional photometering means for photometering a plurality of divided areas of an object field to produce photometered outputs of the respective divisional photometering areas; first exposure value calculation means for calculating a first exposure value based on the photometered values said divisional photometering areas; composite photometered value calculation means for classifying the areas of said divisional photometering means and calculating a composite photometered value for each classified area based on the photometered values of the divisional photometering areas contained in each classified area; second exposure calculation means for calculating a second exposure value based on the composite photometered value calculated by said composite photometered value calculation means; contribution factor calculation means for calculating contribution factors of the first and second exposure values in accordance with a photographing condition; and third exposure value calculation means for combining the first exposure value and the second exposure value in accordance with the contribution factors calculated by said contribution factor calculation means to calculate an exposure value to control the exposure.
Claim 22
Dependent Claim
172 words
An exposure calculation device comprising: divisional photometering means for photometering a plurality of divided areas of an object field to produce photometered outputs of the respective divisional photometering areas; first exposure value calculation means for calculating a first exposure value based on the photometered values said divisional photometering areas; composite photometered value calculation means for classifying the areas of said divisional photometering means and calculating a composite photometered value for each classified area based on the photometered values of the divisional photometering areas contained in each classified area; second exposure calculation means for calculating a second exposure value based on the composite photometered value calculated by said composite photometered value calculation means; contribution factor calculation means for calculating contribution factors of the first and second exposure values in accordance with a photographing condition; and third exposure value calculation means for combining the first exposure value and the second exposure value in accordance with the contribution factors calculated by said contribution factor calculation means to calculate an exposure value to control the exposure.
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) | 1996-09-27 | 1997-03-29 | 1997-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-27 | 2001-03-29 | 2001-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-27 | 2005-03-29 | 2005-09-28 | $7700.00 | Window Closed / Lapsed |