Method of positioning image frame and photographic film carrier
US5555181A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 1992 |
| Grant date | Sep 10, 1996 |
| Priority date | — |
| Expiry date | May 27, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/462
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method is provided for positioning an image frame recorded on a photographic film at a predetermined position for printing process. In the method, an image frame edge is detected depending on a quantity of transmitted light passing through the photographic film during carrying. If there is a faulty image frame having an undetectable frame edge, a film carrying amount is determined depending on a recording tendency of normal image frames preceding the faulty image frame. Therefore, it is possible to compensate, for example, a feed pitch error by a camera, and to position the image frame accurately. Further, it can be established whether the image frame is a standard size image frame or a panoramic size image frame depending on the quantity of transmitted light. Thus, the printing process can be consecutively performed by positioning only one of the two type image frames so that an operation efficiency can be improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.