JPH0786636B2 - camera - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a camera having a device for recording information when taking a picture.

(Background of the Invention) In a silver salt color developing system for obtaining a color image from a color negative film that has been photographed, there are roughly two steps: "film developing" and "stretching".

In these processes, various measures have been taken in order to faithfully reproduce the color tone and contrast of the subject on the color print, but sometimes a color print that is different from the impression when shooting the subject is created. There is a case. In particular, in an automatic printing system that creates 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 color prints with contrast and contrast far from that of the subject. Are often created.

The current daylight type color negative and color printing system are designed to reproduce the color tone of the subject best when photographed under an illumination with a color temperature of about 5500K.

Therefore, when shooting with a camera other than under lighting with a color temperature of about 5500K, install a color temperature conversion filter in front of or inside the shooting lens to convert the color temperature of the illumination light source to about 5500K. Or, it is necessary to perform color correction during the "stretching" process by the color printing system.

Further, the reproducible exposure allowable range (density range with respect to the exposure amount range) in the color negative film and the color print has a drawback that it is narrowed in a region where the exposure amount is large or small. Therefore, for example, when a person is photographed in clear weather and the current exposure amount is not appropriate in the automatic printing system, the color print may have very strong contrast and poor skin texture.

Therefore, in order to optimally adjust the color tone and contrast of color prints, the color tone and density of each color negative film is measured before the "stretching" process, and the printing exposure amount and color are measured based on the measurement results. A method for determining a correction amount is used, and recently, an automatic printing system using a divided photometric method is becoming popular.

In this method, the screen of each color negative film is divided into a plurality of pixels, photometry is performed, and the color tone and density of each measurement site are statistically analyzed to determine the printing exposure amount and color correction amount.

However, even in this case, the color tone and contrast of the color print are not always optimally corrected, and the scene is backlit, the setting sun, the shade, the window, the seaside, and the scene under a tungsten lamp. In many cases, color correction and contrast are not completely corrected.

Therefore, at the photo lab, a skilled worker visually checks each color negative immediately before stretching and corrects the printing exposure amount and color correction amount instructed by the measuring machine according to the situation of the shooting scene, or the finished color. The work involves visually inspecting prints and recreating poor quality prints.

On the other hand, some technologies for improving the reproducibility of color tone and contrast in color printing have been published.

For example, in JP-A-59-162532, by recording information on whether or not a strobe was used at the time of shooting on the camera side and feeding this information back to the "stretching" process,
Techniques for improving the quality of color prints have been disclosed.

Also, in "JP-A-57-185777", a color thermometer is built in the shooting camera, color temperature information about the subject is recorded, and this color temperature information is used during the "stretching" process to improve the quality of color printing. Techniques for enhancing are disclosed.

Normally, the color temperature of strobe light is about 5500K, so by using the above information, the color correction during the "stretching" process can be performed regardless of the color tone of the negative or the color temperature information of the subject in the frame using the strobe during shooting. It can be omitted.

(Problems to be solved by the invention) However, the conditions for using the strobe are not only at night and indoors, but also under conditions where the subject is backlit due to the shade of a tree or the window side even in a relatively bright daytime. May be used. When performing such daytime synchronized shooting, the subject is illuminated with a mixture of strobe light and ambient light, so color correction can be performed correctly only with the information that the strobe is used and the color temperature information of the subject. It had the drawback that it would not be forgotten.

(Object of the Invention) The present invention solves this drawback, and provides a camera capable of determining whether or not the film was taken in a state in which strobe light and stationary light are mixed, as in daytime synchronized shooting. With the goal.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the invention of claim (1) is a camera having a recording means for recording on a recording medium whether or not the flash device is used at the time of photographing. The recording device has a discriminating means for discriminating whether the device is in a normal flash photographing state or a daytime synchronized photographing state, and the recording means discriminates whether the flash device is used in the daytime synchronized photographing state by the judging means. Then, the fact that it is in the synchro photography state during the day is recorded in the recording medium.

The invention according to claim (2) is the camera according to claim (1), wherein the recording means stores, in the recording medium, illumination effect information indicating an illumination effect on a subject, which is determined based on the emission intensity of the flash device. It is characterized by recording.

Further, the invention of claim (3) is a camera having a colorimetric means for detecting a color tone of illumination light of an object to be photographed, and a recording means for recording the color information output from the colorimetric means on a recording medium, The flash unit has a discriminating unit for discriminating whether the flash unit is in a normal flash photographing state or a daytime synchronized photographing state, and the recording unit uses the discriminator to determine whether the flash unit is used in the daytime synchronized photographing state. When a certain determination is made, it is recorded on the recording medium as color information in which the color of the illumination light by the flash device is corrected based on the output of the colorimetric means.

(Operation) According to the inventions of claims (1) and (2), whether or not the flash device is used for the purpose of daytime synchronized photographing in a camera that records whether or not the flash device is used in a recording medium at the time of shooting. Is recorded on a recording medium so that color correction can be appropriately performed at a developing place, and the invention of claim (3) processes the color information to be recorded at the time of daytime synchronized photographing and records it on the recording medium. This makes it possible to appropriately perform color correction at the developing place.

(Embodiment) -First Embodiment-FIGS. 1 to 3 show the configuration of a camera according to a first embodiment of the present invention, and FIG. 1 shows a block diagram of the camera, and FIG. FIG. 3 is an explanatory diagram showing a state in which the recording device 6 according to the first embodiment of the present invention records the strobe light emission information 81 and the daytime synchronization information 82 on the recording medium 8, and FIG. FIG. 3 is an explanatory view showing a photometric device 2 for photometry divided into a part 21 and a peripheral part 22.

A first embodiment of the present invention will be described below with reference to FIGS.

The operation button 1 is provided on the camera body so as to be externally operable, and forcibly puts the strobe 5 in a light emission preparation state. The photometric device 2 measures the brightness of the subject and outputs the photometric output to the control device 4. The distance measuring device 3 measures the distance to the subject. The strobe 5 is configured to automatically emit light based on the photometric output of the photometric device 2 when the subject is a low-luminance subject having a predetermined value or less. The exposure control device 7 controls the shutter and the diaphragm based on the photometric output of the photometric device 2. The recording device 6 records the light emission information of the strobe 5 and the daytime synchronization information on the recording medium 8. The control device 4 is composed of a microcomputer, and controls the strobe 5, the recording device 6, and the exposure control device 7 based on information from the operation buttons 1, the photometric device 2, and the distance measuring device 3 and other input devices. ing. The operation of the control device 4 will be described below.

Generally, there are two cases when performing the daytime sync operation.

As a first case, it is conceivable that the strobe 5 is selected when the subject is not a low-luminance subject and the photographer selects a mode in which the operation button 1 is used to forcibly emit light during photography. At this time, if the brightness of the subject is brighter than a predetermined value based on the photometric information from the photometric device 2, the control device 4 determines that the strobe 5 emits light during daytime synchronized photography.

Then, as shown in FIG.
When is emitted during photographing, the strobe emission information 81 indicating that the strobe 5 has emitted and the daytime synchronization information 82 indicating that the strobe 5 was during daytime synchronization recording are recorded on the recording medium 8 by the recording device 6.

The recording device 6 is a device for recording on the recording medium 8 magnetically, optically, and electrically, for example. As the recording medium 8,
For example, a part of the film outside the photographing screen may be used as a medium, or a removable semiconductor element such as RAM or EEPROM may be used as a medium.

In the second case, as shown in FIG. 3, when the photometric device 2 for dividing the subject into the central portion 21 and the peripheral portion 22 of the screen is used, the control device 4 controls the central portion 21 If the brightness of the object is lower than the brightness of the peripheral portion 22 by a predetermined value or more and the brightness of the entire area is the predetermined value or more, it may be determined that the subject is backlit and the strobe 5 may be automatically emitted.

In this case as well, the control device 4 causes the recording device 6 to record the strobe light emission information 81 indicating that the strobe 5 has emitted light and the daytime synchronization information 82 indicating that it is the daytime synchronization.
To record.

In this way, the recording medium 8 on which the strobe light emission information 81 and the daytime synchronization information 82 and the like are recorded is detached from the camera body and sent to the developing station together with the film. Then, in the "stretching" step, the color of the illumination light is estimated from the color of the strobe light and the tone of the negative film using the information of the daytime synchronization recorded on the recording medium 8, and the illumination light of the estimated color is used. Color correction can be performed as if it was taken in.

-Second Embodiment- FIG. 4 shows a second embodiment of the present invention, showing a state in which the recording device 6 records information on the recording medium 8. In addition to the information of the first embodiment, FIG. The recording device 6 records the strobe effect information 83 on the recording medium 8.

The strobe effect information 83 indicates, for example, the ratio of the strobe light illuminated on the subject to the stationary light, and the brightness information of the subject from the photometric device 2, the distance information to the subject from the distance measuring device 3, It is calculated from the aperture value sent to the exposure control device 7 and the light emission amount of the strobe 5.

In this way, if the strobe effect information 83 is recorded on the recording medium 8 in addition to the information of the first embodiment, in the "stretching" process of the photo lab, if the strobe effect is strong, the strobe light color side is If the effect is weak, it is possible to perform color correction by making a balance on the color side of the illumination light estimated from the color tone of the negative film.

-Third Embodiment-Figs. 5 and 6 show a third embodiment of the present invention.
FIG. 6 shows the configuration of the camera, and FIG. 6 shows how the recording device 6 records information on the recording medium 8. In addition to the first embodiment, the control device 4 includes a colorimetric device 9
The color information of the illumination light of the subject to be photographed is input from.

The recording device 6 has strobe emission information 81 and daytime synchronization information 82.
At the same time, the color information 84 of the illumination light of the subject obtained from the color measuring device 9 is recorded in the recording medium 8.

In this way, if the color information 84 is recorded on the recording medium 8 in addition to the information of the first embodiment, the recorded subject is the color of the illumination light and the strobe light in the "stretching" process of the developing station. It becomes possible to perform color correction assuming that the light is mixed with.

Fourth Embodiment FIG. 7 shows a fourth embodiment of the present invention, showing a state in which the recording device 6 records information on the recording medium 8. In addition to the information of the third embodiment, the recording device 6 records the strobe effect information 83 on the recording medium 8 as in the second embodiment.

In this way, if the strobe effect information 83 is recorded on the recording medium 8 in addition to the information of the third embodiment, in the "stretching" process of the photofinishing laboratory, if the strobe effect is strong, the color side of the strobe light will be displayed. If the effect is weak, it is possible to perform color correction by balancing the color of the illumination light of the recorded subject.

—Fifth Embodiment— FIG. 8 shows a fifth embodiment of the present invention, showing a state in which the recording device 6 records information on the recording medium 8. Normally, the color information 85 of the subject obtained from the color measuring device 9 is recorded on the recording medium 8. However, in this embodiment, when the control device determines that it is the daytime synchronized photographing, the subject is illuminated. The color information 85 is recorded on the recording medium 8 as the optimum color information in which the color change due to the strobe is added to the color information of the light.

The amount of color change due to the strobe is calculated from the luminance information of the subject from the photometric device 2, the distance information to the subject from the distance measuring device 3, the aperture value sent to the exposure device 7, and the light emission amount of the strobe 5.

(Effect of the invention) As described above, according to the present invention, in order to record the daytime synchronization information on the recording medium, it is assumed that the photographed color negative film was photographed by the mixed illumination of the strobe light and the constant light, and Color correction can be performed, and if strobe effect information is used, finer color correction can be performed according to the degree of strobe effect, and a color print with excellent color tone can be provided.

Also, when color correction is performed using color information, the color is corrected according to the degree of the effect of the strobe, so even with a color negative film shot with mixed lighting of strobe light and constant light, excellent color tone printing is possible. It becomes possible to provide.

[Brief description of drawings]

1 to 3 show the configuration of a camera according to a first embodiment of the present invention. FIG. 1 shows a block diagram of the camera, and FIG. FIG. 3 is an explanatory view showing how the strobe light emission information 81 and the daytime synchronization information 82 are recorded, and FIG. 3 is an explanatory view showing a photometric device 2 for dividing the subject into a central portion 21 and a peripheral portion 22 of the screen and performing photometry. Is. FIG. 4 is a second embodiment of the present invention and is an explanatory diagram showing a state in which the recording device 6 records information on the recording medium 8. FIG. 5 and FIG. 6 show a third embodiment of the present invention.
The figure shows a block diagram of the camera, and FIG. 6 is an explanatory view showing how the recording device 6 records information on the recording medium 8. FIG. 7 is a fourth embodiment of the present invention and is an explanatory view showing a state in which the recording device 6 records information on the recording medium 8. FIG. 8 is a fifth embodiment of the present invention and is an explanatory view showing a state in which the recording device 6 records information on the recording medium 8. (Explanation of symbols of main parts) 4 ... Control device (microcomputer) 6 ... Recording device, 8 ... Recording medium

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Toshihiro Sato 1-6-3 Nishioi, Shinagawa-ku, Tokyo Inside Nikon Oi Manufacturing Co., Ltd. (72) Inventor Shigeyuki Uchiyama 1-3-6 Nishioi, Shinagawa-ku, Tokyo Stock company Nikon Oi Manufacturing Co., Ltd. (56) References Japanese Patent Publication No. 58-53327 (JP, B2) Special Publication No. 56-500588 (JP, A)

Claims (3)

[Claims] 1. A camera having a recording means for recording on a recording medium whether or not a flash device is used at the time of shooting, to determine whether the flash device is used in a normal flash shooting state or a daytime synchronized shooting state. The recording means, when the determining means determines that the use of the flash device is in a daytime synchro photography state, records the recording medium in the daytime synchro photography state. Characteristic camera. 2. The camera according to claim 1, wherein the recording means records, on the recording medium, illumination effect information indicating an illumination effect on a subject, which information is determined based on a light emission intensity of the flash device. . 3. A camera comprising: a colorimetric means for detecting a color tone of illumination light of a subject to be photographed; and a recording means for recording color information output from the colorimetric means on a recording medium. Is a normal flash photography state or a daytime synchronized photography state, and the recording means determines that the use of the flash device is a daytime synchronized photography state by the determination means. A camera having recording means for recording on a recording medium as color information in which the color of illumination light from the flash device is corrected based on the output of the color measuring means.