Facsimile and static presentation processing – Natural color facsimile – Color photography previewer
Patent
1993-12-16
1998-07-28
Coles, Sr., Edward L.
Facsimile and static presentation processing
Natural color facsimile
Color photography previewer
396 89, 355 55, 359354, 359813, G03B 1318, G03B 2752, G03B 1514, G03F 310
Patent
active
057869090
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
This invention relates to a printing and development apparatus that can print conventional as well as three dimentional (3D) photographs.
BACKGROUND OF THE RELATED ART
In 3D photography where lenticular sheets are used, there are several general methods for producing 3D photographs, and one of which is what is called the indirect method. In the indirect method, several frames of negatives are prepared for an object, which has a depth and consists of a main object, a foreground and a background, and with photographic angle varied, each negative is printed on a photographic paper containing lenticular sheets, which is then developed to obtain a 3D photograph.
The multiple frames of negatives that are prepared in advance in this method are those that are photographed from stations on either a straight line parallel to the object or a line drawn through the center of the object. Depending on the photographing station, it is possible to prepare negatives that differ with respect to the positions of images of the main object and foreground and the main object and background. Though it is good to increase the number of photographing stations and thus the number of frames of negatives for superior 3D photography, it is the normal practice to have 3 to 5 frames for the sake of simplicity in photographing.
Photographic papers containing lenticular lenses are prepared either by coating with sensitized material the back side of a transparent plastic sheet that acts as lenticular lenses, or by pasting on the plastic sheet a sheet, which is coated with sensitized material. Printing takes place using a set of negatives prepared beforehand by exposure from the side of lenticular lenses, starting from one end of a negative to other the end in the order of photographic stations.
As for varying photographic angle in printing, there are several methods, and frequently used are the printing apparatuses that are generally equipped with fixed-type negative masks and mechanisms to move horizontally lens and exposure station. If the image of each negative is printed onto a single sheet of photographic paper containing lenticular sheet, having varied for each negative the photographic angle, the images become discretized and contracted into line images by the lenticular lenses and are repetitively arranged on the photosensitive layer in correspondence with the direction of photographing.
Though, a negative generally consists of 3 to 5 frames, also frequently practiced are exposure of negatives more than once with the photographic angle changed for each negative, as a means of obtaining reasonably good 3D photographs in a minimum photographing effort. For instance, with regard to a three-frame negative, it is possible to obtain a 3D photograph at the fourth (No. 4) exposure, if negative frames one each obtained at the two extremes of the photographic stations are used in printing in No. 1 and No. 4 exposures, and a single frame of the negative obtained at the central photographic station is used twice in printing in No. 2 and No. 3 exposures.
When 7 exposures are to take place with regard to a three-frame negative, it is possible to obtain a 3D photograph if, the two frames of the negative each obtained at the two extremes of the photographic stations are each twice used in printing in No. 1, No. 2, No. 6, No. 7 and No. 4 exposures, and the single frame of the negative obtained at the central photographic station is thrice used in printing in No. 3, No. 4 and No. 5 exposures. When making the negatives, it is necessary to maintain the accuracy in each exposure by having the center of each exposure coincident with those of the others, and therefore, slight changes in the center of exposure arising from displacement errors in the lens and exposure station mechanisms are rectified.
The method of rectification is exemplified for a 3-frame negative in the case of a four-exposure printing. In order to correct the changes in the center of exposure, focuscharts with three kinds of patterns are prepared in
REFERENCES:
patent: 4656525 (1987-04-01), Norris
patent: 4716470 (1987-12-01), Levine
patent: 4823156 (1989-04-01), Shrader et al.
patent: 4903069 (1990-02-01), Lam
patent: 5023728 (1991-06-01), Nimura et al.
patent: 5028950 (1991-07-01), Fritsch
patent: 5151726 (1992-09-01), Iwashita et al.
patent: 5400096 (1995-03-01), Kamada et al.
patent: 5424801 (1995-06-01), Lo et al.
patent: 5502480 (1996-03-01), Kuga et al.
Akira Toshiro
Itojima Mitsuhiko
Maeda Hisahiro
Miyawaki Hiroshi
Nakao Hiroto
Coles Sr. Edward L.
Noritsu Koki Co., Ltd.
Williams Kimberly A.
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