US4650316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for detecting image information
Assignee: Fujifilm Holdings Corp
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Filing: 1986-02-20
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Granted: 1987-03-17
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Expires: 2006-02-20
Abstract
Abstract It is necessary to photographically measure the density of an original film or to measure the size of a film manually or automatically for input in photographic printing system in order to determine printing exposure amount or correction amount therefor. Image sensors are usually used as a means in such measurement, but image information should be detected always under the same conditions irrespective of the size of negative film frames. This invention method allows effective detection of the whole frame of an original film with substantially the whole area of an image sensor as the method can make the sizes of light receiving areas on the image sensor constantly substantially identical to each other.
Inventors
- 👤 Fumio Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:18
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72; G03B27/73; G03B27/735
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
An image information detecting method comprising the steps of: illuminating an original film with light from a light source; receiving the light through an aperture of a film carrier and a zoom lens set at a reference magnification with a two-dimensional image sensor; detecting image information of the whole area of said two-dimensional image sensor which receives the light for each pixel segment; discriminating the size of the original film by comparing said detected characteristic values with a reference value; and adjusting the light receiving areas of said two-dimensional image sensor in accordance with the result of said discrimination by driving said zoom lens thereby to detect image information in the area of substantially the same number of pixels irrespective of the size of said original film frame.
Claim 2
Dependent Claim
128 words
An image information detecting method comprising the steps of: illuminating an original film with light from a light source; receiving the light through an aperture of a film carrier and a zoom lens set at a reference magnification with a two-dimensional image sensor; detecting image information of the whole area of said two-dimensional image sensor which receives the light for each pixel segment; discriminating the size of the original film by comparing said detected characteristic values with a reference value; and adjusting the light receiving areas of said two-dimensional image sensor in accordance with the result of said discrimination by driving said zoom lens thereby to detect image information in the area of substantially the same number of pixels irrespective of the size of said original film frame.
Claim 3
Dependent Claim
17 words
The image information detecting method as claimed in claim 1, wherein said characteristic values are digital values.
Claim 4
Dependent Claim
17 words
The image information detecting method as claimed in claim 2, wherein said characteristic values are density values.
Claim 5
Dependent Claim
17 words
The image information detecting method as claimed in claim 2, wherein said characteristic values are anti-logarithmic values.
Claim 6
Dependent Claim
17 words
The image information detecting method as claimed in claim 1, wherein said zoom lens is continuously driven.
Claim 7
Dependent Claim
17 words
The image information detecting method as claimed in claim 1, wherein said zoom lens is driven stepwise.
Claim 8
Dependent Claim
31 words
The image information detecting method as claimed in claim 1, wherein the optical axis of said image sensor and zoom lens is inclined from the optical axis of said original picture.
Claim 9
Dependent Claim
22 words
The image information detecting method as claimed in claim 7, wherein said image sensor is arranged in parallel to said original picture.
Claim 10
Dependent Claim
106 words
An image information detecting method comprising the steps of: illuminating an original picture with light from a light source; receiving the light transmitting or reflected from the original picture via zoom lens; detecting image information in the whole area of said two-dimensional image sensor which receives light including the periphery of the original picture for every pixel segment; driving said zoom lens in a manner to make the detected characteristic value coincided with a reference value; and adjusting the light receiving area of said two-dimensional image sensor thereby to detect image information in substantially the same number of pixels irrespective of the size of original pictures.
Claim 11
Dependent Claim
106 words
An image information detecting method comprising the steps of: illuminating an original picture with light from a light source; receiving the light transmitting or reflected from the original picture via zoom lens; detecting image information in the whole area of said two-dimensional image sensor which receives light including the periphery of the original picture for every pixel segment; driving said zoom lens in a manner to make the detected characteristic value coincided with a reference value; and adjusting the light receiving area of said two-dimensional image sensor thereby to detect image information in substantially the same number of pixels irrespective of the size of original pictures.
References Cited (Backward Citations)
US3469105A
Cited
US3708676A
Cited
US3829214A
Cited
US3873201A
Cited
US4375916A
Cited
US4218133A
Cited
US4268165A
Cited
US4383274A
Cited
US4532602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |