JPS59101641A - Film picture observing device - Google Patents

Abstract

PURPOSE:To execute delicately the determination of an exposure quantity by setting a frame corresponding to print picture size to a picture of a monitor television, picturing an observed picture in this frame, and determining a correct light distribution quantity of photograph printing. CONSTITUTION:A frame 34 corresponding to a printing frame of a print picture or a negative film 21 is set to a picture 33 of a monitor television 31, a frame picture of the negative film 21 is pictured in the frame 34, and also a compared picture of luminance corresponding to a standard print density of, for instance, a human face is set in advance to the outside frame. Subsequently, the density of both is compared and in case when excess or shortage exists in the picture density, a correct exposure quantity is calculated by operating differentially a correcting operating circuit 28. Its result of operation is inputted to a correcting amplifier 30, and an operator observes it as a variation of a picture density of the monitor television 31. The operator 6 repeats said operation, depresses an exposure key when an appropriate light emitting quantity is determined, drives a filter shutter drive 32, and executes printing without causing a printing error.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a film image observation device used in a photographic printing apparatus and for determining the exposure amount for photographic printing by correcting the brightness of a positive image displayed on a monitor television.

In conventional photographic printing equipment, the image density of negative film is generally set to 1. Photometry was performed using ATD, and the exposure amount was determined according to the photometric value. In this case, the photometric value is measured mechanically, and the photometric value is determined by empirical rules, ignoring the various characteristics of the photographed image. This method is suitable for general photographic images, but may cause defective prints if the two images have a special color distribution or have extreme brightness areas. Become. In the case of such an image, the operator performs correction and determines the appropriate exposure amount, but this requires a great deal of experience and skill, and even then it is difficult to eliminate defective prints.

The present invention has been created in view of the above, and its first purpose is to clarify a film image observation device for determining the exposure amount while observing a visible image. Other objects of the invention will become apparent from the following description and the accompanying drawings.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A photographic printing apparatus using the film image observation apparatus of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram showing an example of a photographic printing apparatus in which a black and white positive image is projected on a monitor television, in which a negative film 1 is transported in the direction of the arrow by a transport device (not shown) and placed in an exposure section 2. Image density measurement and exposure are performed at the location. It should be noted that whether the negative film is a regular long film or a disc film, there is no difference in the use of the apparatus of the present invention, except for the film conveying or feeding device. 3 is a light source, 4 is a filter, and 5 is a lens barrel. The negative film 1 is fixed onto a mask 6 placed in the optical path by a presser frame (not shown). 7 is an enlarger lens, 8 is a dark shutter,・
Reference numeral 9 denotes photographic paper, which is conveyed in the direction of the arrow and printed on the printing mask 10 area. 11 is LATD
The photometric light receiving element 12 is a three-color separation filter. 13
is an image pickup tube or an image pickup device, which passes an image of the negative film 1 located at the mask 6 position through a mirror 14 and an ND filter 15 used if necessary, and then captures the image through a lens 16 and converts it into an electrical signal. This electrical signal is processed by an electrical circuit (not shown) and displayed on a monitor television as a black and white positive image. Note that when the mirror 14 is not used, the image pickup tube 13 and the like are arranged on the extension of the optical path A. In the case of what is shown in the drawing, since the negative image is imaged diagonally, the screen is in a shrunken state, so it is desirable to use an internal motor circuit or the like to correct it so that it resembles the original image.

Furthermore, although not shown, in the case of a photo printing device in which the exposure section and the photometry section are located in separate locations, other configurations are also possible, such as the image pickup tube 13 may be placed in the photometry section (submitted on the same day). (See FIGS. 2 to 4 and 8 of Patent (4) and their explanations).

Next, referring to FIG. 2, a method for determining the exposure amount in a photographic printing apparatus using the film image observation apparatus of the present invention will be explained.

Light projected from the light source 20 and transmitted through the negative film 21 is converted into an electrical signal by the LATD photometry light receiving element 23 and the image pickup tube or image pickup element 24. At this time,
The ND filter drive 22 is driven as necessary so that the transmitted light is approximately in the middle of the dynamic range of the image pickup tube 24. The output of the light receiving element 23 for LATD photometry is stored in the memory 26 of the central processing unit 25, and at the same time, the output is stored in the memory 26 of the central processing unit 25.
The exposure amount is calculated using T. 2B is a correction arithmetic circuit. On the other hand, the output of the image pickup tube 24 is amplified by an amplifier 29. At this time, the output of the amplifier 29 is controlled by the output signal of the arithmetic circuit 27 described above, and the amplifier 29 also has the function of inverting a negative image into a positive image. 30 is a correction amplifier, and 31 is a monitor television, which displays a black and white image according to the input signal from the amplifier 29.

The operator observes the black and white image on the monitor television 31 and if there is an excess or deficiency in image density (brightness), presses the correction key 2.
Press 8K to differentially operate the correction calculation circuit 2B to calculate the correction exposure amount. The calculation result is input to the correction amplifier 30 and observed by the operator as a change in image density (brightness) on the monitor television 31. The operator repeats the above operations, and when the appropriate exposure amount is determined, presses the exposure key and selects Y, M, 0, . D shutter drive 32
is driven to perform printing.

In the film image observation apparatus of the present invention, image observation on the monitor television 31 by an operator is performed as follows.

That is, as shown in FIG. 3, the screen 33 of the monitor television 31
A frame 34 corresponding to the print screen or the printing frame of the negative film 21 is set, and the negative film 2 is placed in the frame 34.
In addition to projecting the first frame image, a brightness comparison screen corresponding to the standard print density of, for example, a human face as the main subject is set in the outer frame, and the appropriate exposure can be determined by comparing the density (brightness) of the two. Determine the amount. In this case, the standard brightness displayed on the comparison screen may be based on at least one general subject, such as the color of the sky, the sea, or the color of trees, in addition to the human face described above.

Next, FIG. 4 shows one means for synthesizing a negative film frame image and an outer frame comparison screen, and FIG. 5 shows a screen division configuration when this synthesizing means is used.

A composition method when a television camera is used to capture negative film frame images will be described below with reference to FIGS. 4 and 5.

A vertical synchronizing signal is extracted by a circuit 36 from the composite video signal from the television camera 35, and is used as a reset signal for the first counter 37 and the second counter 3B. The reset counters 37 and 3B count the horizontal synchronizing signal separated by the circuit 39 from the composite video signal, and when the count up reaches a preset value, generate a coincidence pulse, and the Q of the flip-flop circuit 40. As a result of the signal, a horizontal signal corresponding to 33b in FIG. 5 is obtained. Here, the mono multivibrator 41c.
41d is set to generate a signal corresponding to the part 33d in FIG. 5, and 41ea 41f is set to generate a signal corresponding to the part 33e in the same figure.

Signals corresponding to portions 33a and 33c in FIG. These screens 33a-33cm
By performing anage switching on the luminance data stored in the memory 26 only at times corresponding to portions 33d and 33f, a composite video signal to which an outer frame comparison screen is added can be obtained.

Furthermore, the image of the negative film displayed on the screen of the monitor television includes cases where it is a single frame image and cases where it is a plurality of frame images. In the latter case, for example, images are taken and stored at the exposure position or prior to exposure for each fixed unit of negative film requested for printing, and the series of images is monitored all at once or continuously. It is displayed on the TV screen. By doing this,
It is possible to compare overexposure and underexposure, color tone, and whether strobes are used or not used between common photographic scenes, making it possible to more precisely determine the amount of exposure. That is, as shown in the specification of Japanese Patent Application No. 56-107633, 1
The adaptation of the eye caused by observing a single frame can be reduced by comparing and observing a large number of images, improving observation accuracy, allowing the observer to easily observe defective images from a large number of frames, and improving image quality during printing. Since only the defective frames need to be dealt with, the work becomes easier. Furthermore, as shown in the specification, by using an image observation device that has means for specifying a defect image from among the plurality of images observed here, and a storage means for storing information related to the defect image in correspondence with each other, It is possible to eliminate the occurrence of defective prints in photographic prints.

In this invention, a frame corresponding to the frame size of the film or the print screen size is displayed on the monitor TV screen, so that it is possible to know the extent of the burn on the film by observing the screen of the monitor TV. Ta. For this reason, printing is useful for eliminating mistakes, and
By making effective use of the screen outside the frame of the monitor TV, it can also help eliminate defective prints.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a photoprinting device incorporating the film image observation device of the present invention, FIG. 2 is a boot diagram, and FIGS. The figure is a block diagram showing an example of a framework synthesis method. In the figure, 1 is negative film, 2 is exposure section, 3 is light source, 4 is filter, 5 is lens barrel, 6 is mask, 7 is enlarger lens, 8 is dark shutter, 9 is photographic paper, 10 is printing frame , 11 is a light receiving element for LATD photometry, 12 is a three-color separation filter, 13 is an image pickup tube or image sensor, 14 is a mirror, 1
5 is an ND filter, 16 is a lens, 20 is a light source, 21 is a negative film, 22 is an ND filter drive, 23 is L
A T ]) Light receiving element for photometry, 24 is an image pickup tube or image sensor, 26 is a memory, 27 is an arithmetic circuit, 28 is a correction arithmetic circuit, 28 is a correction key, 29 is an amplifier, 3θ is a correction amplification 31 is a monitor TV, 32 is Y, M. 0. D, filter drive, 33 and 33a to 33e are monitor TV screens, 34 is a frame, 35 is a TV camera, 36 is a vertical synchronization separation circuit, 37 and 38 are counters,
39 is a horizontal synchronization separation circuit, 40 is a flip-flop circuit, and 41a to 41f are mono-multivibrators.Applicant: Konishiroku Photo Industry Co., Ltd. Representative Patent Attorney Nobuaki Sakaguchi (and 1 other person) ffi 1 □ Fig. 2, 725 Fig. 3 Illustrated handbook (spontaneous) January 31, 1980 Director-General of the Patent Office Kazuo Wakasugi 1 Display of the case 1983 Patent application fJrJ209319 2 Name of the invention Film image Observation device 3 Relationship with the case of the person doing the compensation Applicant Address Name (12'7) Roku Konishi Photo Industry Co., Ltd. 4 Agent 105 6 Number of inventions increased by amendment 7 Specification subject to amendment (invention column for detailed explanation and brief explanation of drawings)
Drawing 8 Contents of the amendment, as shown in the appendix Contents of the amendment C Patent Application 1982-20931
9) The description shall be amended as follows. 1. On page 6, line 6, replace rY, M, c, D, J with “
Filter・'' and correct it. 2. In lines 12 and 13 of page 6, the phrase "print screen...in the skewer printing frame" is corrected to "print screen size or frame size of Neka Film 21". 3 Correct "r33fJ" to "r33e" on page 8, line 7. 4. Correct the phrase "exposure amount" in the second line of page 9 to read "appropriate exposure amount." 5. In the 1st and 2nd lines of page 11, the text "rY, M, C, D, filter drive" is corrected to "filter shutter drive." 6.Amend the drawings as shown in Figure 4 and the attached drawings. that's all

Claims (2)

[Claims] (1) In a device that determines the appropriate exposure amount for photographic printing by capturing an image of a negative film and correcting the brightness of the positive image displayed on a monitor TV, there is no print on the screen of the monitor TV. A film image observation device characterized in that a frame corresponding to a screen size or a negative film frame size is set, and an observed image is projected within the frame. (2) A brightness comparison screen corresponding to a standard print density of a small number of general subjects (both ＼ 1) is formed on the monitor TV screen around the frame on which the observation image is projected. A film image observation device described in Scope 1.