JPS60185941A - Photographic printing method - Google Patents

Abstract

PURPOSE:To print off a photographed film by the method of trimming on enlargement basis and to obtain a print as if a lens having a longer focus than a lens in use were used. CONSTITUTION:A camera capable of printing a mark 12 for trimming information detection is used and the shutter release button is pressed while a part to be trimmed is set in the center of the image plane with a mark print button on. When print magnification is varied, a lens deck 51 and a paper deck 73 are moved so that automatic focusing is performed in the relation 1/a+1/b=1/f, where (a) is the distance from a negative film 30 to a lens 50 and the (b) is the distance from the lens 50 to photographic paper 70. Then, trimming information is detected with the mark 12 and respective mechanisms are put in a trimming print state when the corresponding frame 11 is guided to a printing position.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a novel photographic printing method, and more particularly to a photographic printing method in which negative film photographed with an ordinary camera can be printed as if photographed using a telephoto lens.

(Prior Art) The popularity of cameras in recent years has been remarkable, and this is largely due to what is commonly known as the "Vacation Camera." For this type of camera, the film used is 110, 12
6,135, and the equipped lens is a semi-wide-angle lens or a standard lens (for example, 35-50
mm), and lens-shutter cameras with no interchangeable lenses are common.

On the other hand, when taking photos, there are many cases where you want to use a telephoto lens, and in this case, technically you can use the cropping method, but once you request a photo print, you can specify the image composition for cropping based on the completed print. It is not a method that can be widely used because it is inefficient because it cannot process large quantities, it is not available at a limited number of stores, and it is expensive because it requires manual adjustment.

(Objective of the Invention) The present invention was created in view of the above, and it is possible to enlarge the photographed film using a trimming method and use a lens with a longer focal length than the lens used. The main purpose of the present invention is to clarify a photographic printing method that can obtain prints similar to the above, and other objects and benefits of the present invention will become apparent from the following description and drawings.

(Structure of the Invention) Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an example of a developed negative film used to make photographic prints of the present invention. A mark 12 is printed on the side of an image portion (frame) 11 of the negative film IO, for example. It's included.

The frame 11 on which the mark 12 is printed should be trimmed and enlarged before printing.

The illustrated mark 12 is displayed, for example, as a dot on the outside of the image area 11 using a known date imprinting method, but by improving the camera mechanism, it can be engraved or printed (including symbol printing), or even magnetically. It may be something that is input as information.

Further, the mark 12 may specify only trimming information, but it is preferable that the mark 12 specifies a plurality of pieces of information such as a trimming center position and an enlargement magnification.

To explain the above in more detail, as shown in FIG.
By setting 2 to a plurality of pieces of information so that a plurality of pieces of information can be specified, it becomes possible to specify an arbitrary print magnification.

In the device shown in FIG. 3, the trimming position is designated by a mark 12A, and the trimming range can be freely designated as shown by the chain line during photographing. For example, when taking a picture with a camera, it may be specified in the viewfinder, and the information may be marked with a symbol on the film.

Next, referring to FIG. 4, a photographic printer for printing photographs according to the present invention will be explained. In the figure, 20 is a light source, 21
22 is a heat absorption filter, 22 is a color filter, and 23 is a lens barrel. The negative film 30 is fed in the direction of the arrow by a feed roller 31 of a negative film transport mechanism, and its position is detected by a notch detector 32 and guided to a negative mask 33 position. 40 is a photometric detector, 50 is a lens, and 60 is a dark shutter. Reference numeral 70 designates photographic paper, which is the same as the one normally prepared in roll form for normal printing, is fed in the direction of the arrow by a feed roller 71 of a conveying mechanism, and guided to the paper mass foot 2 position. 80 is a detector for detecting the mark 12 shown in FIGS. 1-3.

The above-mentioned apparatus is basically the same as a known automatic photo printing apparatus, but the mechanism needs to be improved in order to perform the photo printing of the present invention, and will be explained in detail below.

(1) Detection of trimming information Detect the mark 12 shown in Figures 1 to 3, and
When the printer is guided to the print position, each mechanism described in detail below is moved to the trimming print state. In this case, as described above, the trimming range and magnification information are also detected. To detect this information, for example, a photoelectric detector 80 shown in FIG. 4 is used, but various designs including mechanical ones are possible depending on the type of mark 12. .

Further, the position where the detector 80 is provided is not limited to the one shown in the figure, but may be located at the printing position, and furthermore, in the case of a model in which the image density measuring device is placed before the printing position. A detector 80 is placed at that position, and in this case, the trimming information is processed together with the image density information. For example, according to information that enlarges a specific range of the center position of a frame image, only that part is printed on the standard print.

(2) Change print magnification There are two types of print magnification: a fixed type and an optionally specified type.

In the former case, even in the case of trimming, printing is performed at a preset print magnification, and since there is a choice between standard printing and trimming printing, the device can be designed relatively simply.

When changing the print magnification, as shown in FIG. 4, if the distance from the negative film 30 to the lens 50 is a, and the distance from the lens 50 to the photographic paper 70 is b, then I/a
If the lens deck 51 and paper deck 73 are moved so that automatic focusing is achieved using the relational expression +1/b=l/f, the print magnification m is m1=bt/at, m2=b2
/a2 allows countless print magnifications to be obtained.

Other methods of changing the print magnification include using a zoom lens and controlling the rotation of the lens while keeping the lens position fixed to obtain an arbitrary print magnification; or, for example, changing the magnification on a rotatable lens base. There is a method of preparing a plurality of different lenses and selecting the lens to be used according to specified print magnification information.

(3) Determination of exposure amount, etc. When performing photographic printing according to the present invention, the area of the frame images used is naturally small and the printing magnification is high, so the exposure for standard printing is It is necessary to correct the amount.

The exposure amount is determined by calculating the exposure amount according to the information provided by the reference correction amount determining means, the negative photometry means, the density/color correction means, and the magnification determining means, but the method or device for determining the exposure amount is A variety of applications are possible that are used in conventional (automatic) photoprinting machines.

The same applies to color balance adjustment.

In the case of an arbitrary designation method for print magnification, the print magnification changes variously, so in order to do this with an automatic photo printer, for example, (A) at the time of setup work, set each print magnification and effective negative screen area in advance. (B) Perform the setup work in the same way as normal full-screen printing, and adjust the exposure as the print magnification changes. One possible method is to calculate and correct changes over time. In the former case, in order to perform printing using LATD photometry, a negative mask corresponding to the trimming range is required in order to block unnecessary negative transmitted light from outside the trimming range. If the trimming range (area) can be arbitrarily selected, prepare a plurality of negative masks and exchange them, or use a variable type. In the case of (B) above, the negative mask may be the same as that for full-screen printing, but it is necessary to improve the accuracy of correction of density and color balance with respect to changes in magnification.

The photographic print magnification method of the present invention is carried out by the various mechanisms described above, and the processing process will be explained.

(1) Shooting Using a camera that can print the mark 12 shown in Figures 1 to 3, all you need to do is turn on the mark burn button, position the area you want to trim in the center of the screen, and press the shutter. . As shown in FIG. 3, if the trimming position is off from the center of the screen, the mark burning button for specifying the trimming range must be operated.

(2) Reception of prints This can be done at the same agency as when accepting regular photo prints. In this case, we may accept requests to print the frame 11 on which the mark 12 for trimming is printed without trimming, or
2 has been completed, but you can cancel this and accept it.

(3) Photographic printing process in the laboratory After the negative film has been developed, it undergoes pre-processing to determine exposure, color adjustment, etc., and is then set in the above-mentioned automatic photographic printing machine for photographic printing. Note that this process can be executed not only by an automatic photo printer but also by a printer operated by an operator.

The photographic paper used is a roll of service size paper, which is the same as that used for regular printing, but photographic paper of a different size (rolled or cut) is used. It may be prepared separately and used. Also, when printing on prints of the same service size, the magnification is stepless (like a zoom telephoto lens) but stepless (
For example, negative street, center part 1.5 times, center part 2.0
double, etc.). Furthermore, the mark on the negative may be such that other marks such as the number of copies printed can also be recorded.

(Effects of the Invention) According to the photographic printing method of the present invention, it is possible to obtain an enlarged print of the portion shown by the chain line from the film 10 shown in FIG. This is made possible by the photographic print processing system of 2005, and in addition to the recent improvements in the sensitivity and image quality of photographic films, there is an advantage in that similar enlarged prints can be obtained at low cost without using a telephoto lens.

[Brief explanation of the drawing]

1 to 3 are plan views of a negative film for carrying out the photographic printing method of the present invention, and FIG. 4 is a schematic diagram of a photographic printing machine. In the figure, 10 is a negative film, 11 is a frame image,
12 and 12A are marks, 20 is a light source, 21 is a heat absorption filter, 22 is a color filter, 23 is a lens barrel, 30 is a negative film, 31 is a feed roller, 32 is a notch detector, 3
3 is a negative mask, 4o is a photometric detector, 5o is a lens,
51 is a lens deck, 8o is a dark shutter, 70 is photographic paper, 71 is a feed roller, 72 is a paper mask, 73
Patent applicant featuring a paper deck Patent attorney Nobuaki Sakaguchi (and 1 other person) Representative of Konishiroku Photo Industry Co., Ltd. s4 Figure J ((,8-,-20

Claims (3)

[Claims] (1) Detects the trimming designation mark recorded on the film, and when printing a photo of a frame with this mark recorded, the print magnification is made larger than that of the standard print size, and the trimmed enlarged print is printed. A photo printing method characterized by: (2) The photographic printing method according to claim 1, wherein correction of exposure amount, color adjustment, etc. are performed in response to changes in print magnification. (3) The photo printing method according to claim 1, wherein the trimming operation is performed in a simultaneous printing process.