US4447154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for detecting focus of image
Assignee: Fujifilm Holdings Corp
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Filing: 1981-06-19
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Granted: 1984-05-08
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Expires: 2001-06-19
Abstract
Abstract The focus of a picture image on a color film is evaluated by dividing the picture image into minute picture elements, detecting those portions of the picture image which are of flesh color from the separated color transmission factor or the color density of the picture elements, and using the information obtained regarding the flesh color portions to detect whether or not the picture image is out of focus.
Inventors
- 👤 Takashi Fukui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:09
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/28; G02B7/30; G02B7/32; G03; G03B; G03B27/00; G03B27/72; G03B27/80
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
77 words
A method for detecting whether a picture image recorded on a color recording medium is out of focus comprising the steps of: dividing the picture image into minute picture elements, detecting which portions of the picture image are of flesh color by separating the picture elements according to color transmission factor or color density of the picture elements, and detecting whether or not the picture image is out of focus from measurements on the flesh color portions.
Claim 2
Independent Claim
77 words
A method for detecting whether a picture image recorded on a color recording medium is out of focus comprising the steps of: dividing the picture image into minute picture elements, detecting which portions of the picture image are of flesh color by separating the picture elements according to color transmission factor or color density of the picture elements, and detecting whether or not the picture image is out of focus from measurements on the flesh color portions.
Claim 3
Dependent Claim
32 words
A method according to claim 1 wherein the separated color transmission factor or the color density of the picture image is detected through two types of blur masks having different sized apertures.
References Cited (Backward Citations)
US4203671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |