JPH01280733A - Camera - Google Patents

Abstract

PURPOSE:To obtain a color copy on which the intention of a photographer is reflected by recording information when photographing is performed and processing feedback by means of information which follows instructions to repeal information and decides whether correction is necessary or not when the feedback is performed in an enlarging stage. CONSTITUTION:Every time the frame of a film is photographed, color temperature correction information, printing grade information and information on which correction is necessary or not regarding the frame are recorded in an information recording part 90. When all the frames of the film are photographed, the film is sent to a processing laboratory. After film developing stage is finished, information on the frame of the film to be enlarged is read out by means of the information recording part 90 in the enlarging stage. When the information on which correction is necessary or not decides that correction is necessary, a color copy is formed based on the color temperature correction information and the printing grade information. When the information on which correction is necessary or not decides that correction is not necessary, the color copy is formed assuming that photographing is performed under light the color temperature of which is 5,500K although printing exposure quantity is set by means of the printing grade information. Thus a color copy on which the intention of the photographer is reflected can be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a camera that takes photographs and records information at the time of photography.

(Prior Art) In the silver halide color development method for obtaining color prints from photographed color negative film, there are two main steps: "film development" and "enlargement."

In these two processes, various efforts have been made to faithfully reproduce the color tone and contrast of the subject on the color print, but sometimes the color print produced differs from the impression when the subject was photographed. There may be cases where

In particular, in automatic printing systems that produce color prints from a large amount of negative film at a time, it is important to efficiently obtain high-quality color prints in a short time, but it is important to efficiently obtain high-quality color prints in a short time. Color prints are often made.

Current daylight type color negative and print systems are designed so that the tones of the subject are best reproduced when the image is photographed under lighting with a color temperature of approximately 5,500 degrees.

Therefore, if a photograph is taken under lighting with a color temperature lower than 5500, such as a household incandescent light bulb, the color print will have a strong reddish tone, and if the color temperature is lower than 5500, such as on a cloudy sky.
500, a color print with a strong bluish tone is created when the photograph is taken under high illumination.

Therefore, when shooting under illumination with a color temperature other than 5500K, you must attach a color temperature conversion filter in front of the film to convert the color temperature of the illumination light source to approximately 5500K, or use "enlarger". It is necessary to perform color correction during the JT process.Also, there is a drawback that the reproducible exposure tolerance range (density range relative to the exposure range) for color negative film and color photographic paper is narrowed in areas with small or small exposure doses. Therefore, for example, when photographing a person under clear sunlight, with the current automatic printing system, if the exposure level is inappropriate, the result may be a color print with very strong contrast and poor skin texture. .

In order to optimally adjust the tone and contrast of color prints, we measure the tone and density of each color negative film at the surface stage of the enlarging process, and then adjust the exposure and color correction amounts for printing based on the measurement results. Recently, automatic printing systems using a divided measurement method have become popular.This method divides the screen of each color negative film into multiple pixels and measures the color tone and density of each measurement area. The image is analyzed like a gunshot wound, and the print determines the amount of exposure and color correction.However, even in this case, the tone and contrast of color prints are not necessarily corrected optimally, and Color correction and contrast are often not completely corrected in scenes such as sunset scenes, scenes behind trees, scenes by a window, seaside scenes, snowy mountain scenes, and scenes under tungsten lights.

For this reason, at the photofinishing laboratory, skilled workers visually inspect the color negative one frame at a time just before enlarging, and adjust the exposure and color correction amount as instructed by the measuring machine according to the conditions of the shooting scene. Or, the completed color prints are inspected before being inspected, and poor quality prints are made and repaired.

In response, several techniques have been announced to improve the reproducibility of tone and contrast in color printing. For example, in "Unexamined Japanese Patent Publication No. 57-185777 J,
A technology has been disclosed that improves the quality of color printing by incorporating a color thermometer into a photographic camera, recording color temperature + ILF information about the subject, and using this color temperature information during the enlargement process.

In addition, "Unexamined Japanese Patent Publication No. 59-162532 J records information on whether or not a strobe was used during shooting on the camera side,
A technique has been disclosed that improves the quality of color prints by feeding this information back to the enlarging process.

(Problems with the Prior Art) However, in the prior art, there is a problem for the photographer in that the effect intended at the time of photographing cannot be reflected in the color print.

For example, in situations with a high color temperature such as rainy or cloudy weather, you can deliberately make the color tone bluish to emphasize the chilly feeling.
In order to emphasize that it is a sunset scene by making the color tone of the subject illuminated by the setting sun with a low color temperature reddish, the photographer may not use a color temperature conversion filter or intentionally set the color temperature to 5500. Even if a color temperature conversion filter is used in the direction of separation, color temperature correction is performed in the enlarging process based on color temperature information obtained from a color temperature meter inside the camera, and both scenes in the above are shown as if it were daylight. The result will be a color print with tones similar to the one photographed below.

On the other hand, a photometer in a camera outputs an appropriate amount of exposure to the film assuming that the subject is an object with a reflectance of about 18% (corresponding to gray). Therefore, if you photograph a subject with high reflectance, such as a white wall, or a subject with low reflectance, such as a black wall, using the exposure output by the photometer, a gray wall will be recorded on the film. Become. Therefore, in order to photograph a black subject as black, the photographer must make exposure compensation to reduce the exposure amount compared to the exposure output by the photometer, and conversely, to photograph a white subject as white, the exposure amount must be high. You can adjust the exposure compensation accordingly. Exposure compensation can be done by the photographer or by operating the exposure compensation command means in automatic exposure mode, in which the camera automatically sets the shutter speed and aperture based on the exposure output from the photometer.
Alternatively, in manual mode, the shutter speed and aperture are set by the photographer, and the photographer himself or herself sets the shutter speed and aperture by adding exposure compensation to the exposure output from the photometer.

However, in the enlarging process, the exposure amount for printing is determined by automatically reading the density of the negative film. Therefore, as mentioned above, even if you perform exposure compensation to increase the exposure to make a white subject white, the density of the negative film will be too high, so in the enlarging process, the exposure will be set to a lower value. This results in a color print in which a white subject becomes gray, and even if you try to make a black subject black by adjusting exposure compensation to reduce the amount of exposure, the density of the negative film is too low, resulting in color prints. The exposure value is set too high, resulting in either a black subject or a gray color print.

(Purpose) The present invention has been made to solve these problems, and it is an object of the present invention to provide a camera that can reflect the photographer's intentions in color prints.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a camera that records information at the time of photographing and feeds it back to the enlarging process, which is equipped with a command means for invalidating the information. are doing.

(Function) According to the present invention, the information at the time of photography can be invalidated by the photographer operating the invalidation command means, so the photographer can obtain color prints that reflect his or her intentions. Things are coming.

(Example) The figure is a diagram showing the configuration of an embodiment of the present invention.

In the figure, an information processing section 10 has a function of receiving one or two pieces of information from the outside, performing arithmetic processing on the information, converting it into a certain predetermined format, and recording it in an information recording section 90.

The information processing unit 1O receives the aperture value from the aperture setting unit 30, the shutter speed from the shutter speed setting unit 80, the brightness information of the object from the photometer 40, and the color temperature information of the object from the colorimeter 50. , distance information from the distance measuring means 60 to the subject, a signal indicating whether or not the strobe has emitted light from the strobe light emission detection section 70, correction necessity setting means 20
A signal indicating whether or not color correction is to be performed in the enlarging process is input from .

Color temperature correction information, degree of burning information, and correction necessity information are inputted to the information recording section 90 from the information processing section 10 . The color temperature correction information is set by adding information from a section other than the correction necessity setting means to the color temperature information of the embellishing device 50, and during the enlarging process, color temperature correction is performed based on this color temperature correction information, and the color A print is created.

The printing degree information is set based on information from parts other than the embellishing device 50 and the correction necessity setting means 20, and is set during the enlarging process when a negative film photographed with an appropriate exposure amount is enlarged. A correction amount for a predetermined burn-in amount is determined based on this burn-in degree information.

The correction necessity information is set by the correction necessity setting means 20,
During the enlargement process, it is determined whether or not to perform color temperature correction based on the color temperature correction information based on this correction necessity information.

The information recording section 90 and the recording method include, for example, a method of optically imprinting information on the part of the film outside the photographic screen as an information recording section, or a method of providing a magnetic tape outside the photographing screen and magnetically imprinting the stiffness as an information recording section. There is a method of recording information, and a method of incorporating an EEPROM in a film cassette or the like and using this as an information recording section to electrically write information.

Next, the present invention will be explained in detail.

First, by pressing the shutter release button (not shown) halfway, the photometer 40, the colorimeter 50, the distance measuring means 60,
The aperture setting section 30 and shutter speed setting section 80 start operating. When the photographer fully presses the shutter release button, a shutter device and an aperture device (not shown) are activated, and the film is exposed. Then, the information processing section 10 sets color temperature correction information, degree of printing information, and correction necessity information based on each piece of information manually inputted immediately before the shutter device and the aperture device are operated, and records them in the information recording section 90.

Here, an example of how to set the degree of baking information will be explained. For example, if the exposure amount of the film determined by the settings of the shutter speed setting section 80 and the aperture setting section 30 is not appropriate for the brightness information of the subject from the photometer 40, the overexposure or underexposure will be corrected. It is considered as degree information. Furthermore, when the strobe light detection section 70 detects that the strobe has emitted light, the exposure is performed when the subject distance obtained by the distance measuring means 60 is far from the appropriate exposure distance given by (strobe guide number) ÷ (aperture value). If it is underexposed or close to overexposure, it is assumed to be overexposure and is used as exposure information.

Next, an example of how to set color temperature correction information will be given.

In normal cases, the color temperature correction information is simply the color temperature value itself of the object field obtained by the colorimeter 50, or the difference from 5500. However, the colorimeter 50 cannot measure the color temperature of a strobe that emits light instantaneously after the shutter device is activated, and even when the strobe is used, it measures the color temperature of the illumination light before the strobe is emitted. Therefore, when the strobe light emission detection section 70 detects that the strobe has emitted light, and the subject distance obtained by the distance measuring means 60 is equal to or close to the predetermined appropriate exposure distance, the color temperature information from the embellishing device 50 is ignored. The color temperature of a predetermined strobe light is used as color temperature correction information. When the subject distance is farther than the appropriate exposure distance, the influence of illumination light other than the strobe light becomes strong, so the color temperature of the strobe light and the color measurement device 50 are determined based on the subject distance and the aperture value from the aperture setting section 30. A weighted average of the color temperatures of the object scene output by the camera is used as color temperature correction information.

The correction necessity information is set by the correction necessity setting means 20. The correction necessity setting means 20 consists of a manual member such as a switch, and normally outputs a "correction type signal" to the information processing section 10.As mentioned above, since the photographer is aiming for an intentional effect, When color temperature correction is not required during the enlarging process, the "correction stand" can be adjusted by operating the manual section.
The signal is output to the information processing section 10. The information processing section 10 records this "correction stand" or "correction required" signal in the information recording section 90 as correction necessity information. Here, when the correction necessity setting means 20 uses "correction base" to take a picture, it is a special case when the photographer is aiming for an intentional effect, as mentioned above, and therefore it is considered to be infrequent. For example, the correction necessity setting means 20 normally indicates “correction required.”
If you make a switch that acts as a "correction stand" only while it is pressed, and if the photographer wants to decide whether or not to correct it, he or she can press the release button while holding down this switch to take a picture. This will prevent you from accidentally taking multiple shots without realizing that you are using the "correction stand".

Or, each time you press the switch, "Correction Required" and "Correction Base" are switched, and when the shutter release button is fully pressed to activate the shutter device and the shooting is finished, it is automatically set to "Correction Required". Other formats are also possible.

As described above, each time a frame of film is photographed, the information recording section 90 records color temperature correction information, degree of exposure information, and correction necessity information regarding that one frame. After all frames of the film have been shot, the photographer sends the film to a processing laboratory. Since the information recording section 90 is located within the film or within the film cassette as described above, it is sent to the processing laboratory together with the film. After the film development process is completed, information regarding the frames of the film to be stretched in the stretching process is read out from the information recording section 90. When the correction necessity information is "Correction required", a color print is created based on the color temperature correction information and printing intensity information, and when the correction necessity information is "Correction base", the exposure amount is It is set by the baking information, but the color temperature is set by color temperature 5.
A color print is created assuming that the photograph was taken with an illumination F of 500 degrees.

In the operation described above, the color temperature correction information is the same information regardless of whether the correction necessity setting means 20 is set to "correction required" or "correction table", that is, as described above, the color temperature correction information is the same regardless of whether the correction necessity setting means 20 is set to "correction required" or "correction table". Information based on a signal such as 70 is set. On the other hand, when the signal from the correction necessity setting means 20 is "'correction not required", a color print is created at a color temperature of 5500 during the enlarging process, but the color temperature is 550.
The method of setting and recording the color temperature correction information assuming that the color temperature is 0, but not recording the correction necessity information is abandoned. However, with this method, if the finished color print is very unsightly, or if you want to correct the color temperature later, the color temperature information at the time of shooting is not corrected by the information recording section 9.
Since the color temperature does not remain at 0, it is difficult to optimally correct the color temperature in reprint [. In this regard, in the present invention, even if the signal from the correction necessity setting means 20 is "correction not required", the information recording section 90 stores the color temperature information at the time of photographing or the color temperature correction information.
, so you can perform optimal color temperature correction when reprinting.

Note that in this embodiment, the correction necessity information is used only to determine whether color temperature correction is necessary based on the color temperature correction information.
The printing based on the printing degree information may be used to determine whether or not the exposure amount needs to be corrected. In this way, for example, even if the photographer intentionally overexposes or underexposes the image, it will not be corrected during the enlarging process.
If this is combined with the necessity of color temperature correction, the photographer's intentions can be more reflected in the color print. In this case, the following four combinations of color temperature and exposure amount correction are required for printing.

1. Color temperature correction required, exposure correction required for burn-in 2. Color temperature correction required, exposure correction not required for burn-in 3. Color temperature correction not required, exposure correction required for burn-in 4. Color temperature correction not required, burn-in Therefore, as the correction necessity setting means 20, a switch or the like that outputs four states may be used.

In addition, the photographer's intentional overexposure or underexposure is equivalent to performing exposure compensation as explained in the problem section of the prior art. However, when the exposure mode of the camera is automatic exposure mode and the exposure compensation is performed by the exposure compensation command means, the image burn-in is performed when the exposure compensation is "correction 1 or not".
It is also possible to set "Correction required" when no exposure compensation is being performed, and always set burn-in exposure compensation to "Correction not required" in manual mode.In this case, there are two options: whether or not color temperature compensation is required. A switch for outputting the state of exposure, exposure compensation command means such as an exposure compensation dial for performing exposure compensation in automatic exposure mode, and means for switching to manual mode each constitute correction necessity setting means 20 in the present invention.

In this embodiment, color temperature correction information,
The degree of baking information corresponds to the information in claim 1 of the present invention.

(Effects of the Invention) As described below, according to the present invention, while taking a photograph,
A camera that records information at the time of photographing and feeds back this information during the enlarging process is equipped with a command means for invalidating the information, so that a color print that reflects the photographer's intention can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings are diagrams showing the configuration of an embodiment of the present invention. (Explanation of symbols of main parts) 10---1 information processing unit, 20---1 correction necessity setting means, 30---1 aperture setting unit, 40---m-photometering device, 50---1 color measuring device, 60---- distance measuring means, 70---- strobe light emission detection section, 80---- shutter speed setting section, 90---- one information recording section,

Claims (1)

[Scope of Claims] 1. A camera that takes photographs, records information at the time of photography, and feeds back the information during the enlarging process, characterized by comprising a command means for invalidating the information. camera. 2. The camera according to claim 1, wherein the information invalidation command means is an exposure correction command means in automatic exposure mode.