JPH11231410A - Camera used for silver salt photographing and also for electronic image pickup - Google Patents

Abstract

PROBLEM TO BE SOLVED: To confirm the exposure level of a subject and the blurred state of a background imprinted on a silver salt film by a liquid crystal monitor and to inform a photographer of appropriate exposure level and stop value. SOLUTION: This camera has an electronic image pickup device including an area sensor 15, a monitor display device 23 consisting of liquid crystal and a photographing device including a shutter 6 to expose the silver salt film 7, and the state of an image to be photographed on the silver salt film is previously confirmed by the monitor display device by executing luminance correction for the image of a subject image outputted by the photographing device or changing a diaphragm in the middle of an input optical path to an image pickup device stepwise and executing image pickup.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has both functions of an electronic image pickup device having an electronic image pickup device for converting a subject image into an electric signal and a silver halide photographing device for imprinting the subject image on a silver halide film. , A camera for both silver halide photography and electronic imaging.

[0002]

2. Description of the Related Art Conventionally, a camera for both silver halide photography and electronic imaging that exposes a subject image to a silver halide film and stores the subject image photoelectrically converted by an electronic image pickup device in a memory is known. For example, Japanese Unexamined Patent Publication No. 1-1330
No. 38 discloses a configuration in which a light beam is branched to a finder optical system by a half mirror when a shutter is closed, and the light beam is branched to an image sensor and a photosensitive material by rotating the half mirror when the shutter is opened. It is shown. Here, the image signal of the subject image obtained by the image sensor is displayed on a monitor provided in the camera in advance, so that the camera operator can immediately confirm the subject image at the time of shooting.

[0003]

In a silver halide camera, it is generally impossible to determine at the time of photographing whether or not an image photographed on a film is photographed as intended by the photographer. . That is, the camera operator cannot accurately determine whether or not the exposure level of the subject image projected on the film and the degree of blurring of the background are appropriate at the time of shooting. For this reason, in the recent silver halide camera market, cameras having a so-called auto bracket mode are sold. In the auto bracket mode, it is not possible to accurately determine whether or not the exposure level is at an appropriate level according to the operator's intention at the time of shooting, so that, for example, the exposure level is set to -1, ± 0, +1.
The photographing is automatically performed continuously for three frames while switching to the three stages. In other words, if you change the exposure level and shoot multiple frames, any of the shot frames
This is a mode in which photographing is performed with the expectation that the exposure level will be as intended by the camera operator.

On the other hand, in the configuration of Japanese Patent Laid-Open Publication No. Hei 1-133038, it is possible to check the composition at the time of photographing in advance, but the exposure level and the degree of blurring of the background when imprinted on the film are appropriate. There is no mention of prior confirmation as to whether or not this is the case. In a camera having the auto bracket mode, a plurality of frames must be shot, so that the film is wasted.

The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide an electronic image pickup means for converting a subject image into an electronic image and a silver halide photographing means for exposing the subject image to a silver halide film. With a simple configuration, it is possible to check in advance the exposure level of the subject to be photographed on the film and the degree of blurring of the background. It is an object of the present invention to provide a camera capable of informing a photographer of a value.

[0006]

According to a first aspect of the present invention, there is provided a camera for both silver halide photography and electronic imaging.
Electronic imaging means for converting a subject image into an electronic image; silver halide photography means for exposing the subject image to a silver halide film; and an imaging mode for setting a desired imaging mode among a plurality of imaging modes in the electronic imaging means Setting means, based on a desired imaging mode set by the imaging mode setting means, image processing of the electronic image obtained by the electronic imaging means, electronic image generation means to generate a plurality of different electronic images, Monitor means for simultaneously displaying a plurality of different electronic images generated by the image generation means on the same screen for each of the desired modes.

According to a second aspect of the present invention, there is provided a camera for both silver halide photography and electronic imaging, wherein electronic imaging means for converting a subject image into an electronic image, and silver for exposing the subject image to a silver halide film. Salt imaging means, an imaging mode setting means for setting a first imaging mode for performing one imaging operation and a second imaging mode for performing a plurality of imaging operations in an imaging mode of the electronic imaging means, When the first imaging mode is set by the imaging mode setting means, image processing is performed on an electronic image obtained by the one imaging operation to generate a plurality of different electronic images,
An electronic image generation unit configured to generate a plurality of different electronic images obtained by the plurality of imaging operations when the second imaging mode is set by the imaging mode setting unit; Monitor means for simultaneously displaying a plurality of different electronic images on the same screen for each of the imaging modes set by the imaging mode setting means.

According to a third aspect of the present invention, there is provided a camera for both silver halide photography and electronic imaging.
In the camera for both silver halide photography and electronic imaging described above, when the first imaging mode is set, a plurality of different electronic images generated by the electronic image generating means have different luminances.

According to a fourth aspect of the present invention, there is provided a camera for both silver halide photography and electronic imaging.
In the camera for both silver halide photography and electronic imaging described above, when the second imaging mode is set, a plurality of different electronic images generated by the electronic image generation means have different aperture values.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram illustrating a system according to the present embodiment. A photographic lens for forming a subject image includes a positive lens 1 and a negative lens 3,
An aperture mechanism 2 is disposed in the photographing lens, and the aperture mechanism 2 is driven and controlled by an aperture drive circuit 12. A half mirror 4 is provided behind the negative lens 3, and a part of the subject light reflected by the half mirror 4 forms an image on an area sensor 15 through an imaging lens system 14.

An area sensor 15 as an electronic image element is controlled by an area sensor drive circuit 13, converts the formed subject image into an analog video signal, and outputs it to a signal processing circuit 22. The signal processing circuit 22 performs predetermined signal processing required for a known camera including conversion of the analog video into a digital signal. The signal processing circuit 22 is connected to a video memory 21 and a liquid crystal (LCD) monitor 23, and is also connected to a nonvolatile memory 26 and the like via a data bus 24.

The signal processing circuit 22 transfers the processed signal to the video memory 21 and the non-volatile memory 26, and the electronic image stored in the video memory 21
3 is displayed. The non-volatile memory 26 is attachable to the camera body, can be electrically rewritten, and retains the storage of the electronic image even when the power of the camera body is turned off, and is used for recording the electronic image. Further, the luminance of the subject is measured using the analog signal of the area sensor 15,
This analog signal is digitized by the signal processing circuit 22 and then transmitted to the CPU 27 via the data bus 24.

Further, behind the half mirror 4, there is provided a movable mirror 5 whose central part is a half mirror. It is provided to reflect. A separator optical system 16 for separating two images, which is composed of two optical systems, is arranged in the direction of the reflection optical axis of the sub-mirror 32 and in the direction perpendicular to the drawing. A line sensor 17 is disposed at the position where the subject image is formed by the separator optical system 16, and the line sensor 17 is connected to a line sensor drive circuit 19. The sub-mirror 32, the separator optical system 16, the line sensor 17, and the like constitute a focus detection device based on a known phase difference method. The CPU 27 outputs two images based on a signal input via the line sensor drive circuit 19. The distance is obtained, and the driving amount of the photographing lens for driving to the focusing position is calculated.

Each of the lenses 1 and 3 of the photographing lens is provided with a zoom / focus drive circuit 11 for controlling a drive source for a focus adjustment operation and a zooming operation. The zoom / focus drive circuit 11 has an encoder (not shown) that generates a signal in accordance with the movement of each of the lenses 1 and 3, and the CPU 27 calculates the signal based on the calculated drive amount and the encoder output. Performs zoom adjustment and focus adjustment. On the reflected light path of the movable mirror 5, a focusing plate 29, a pentaprism 30, and a finder eyepiece optical system 31 are arranged. The reason why the optical finder is provided in addition to the LCD monitor 23 for monitoring the subject is that the camera operator takes a picture while looking through the optical finder rather than taking a picture while looking at the LCD monitor 23. , The holding performance of the camera has been improved,
This is because camera shake is unlikely to occur.

The movable mirror 5 is provided with a mirror driving circuit 18.
, And the shutter 6 is driven by a shutter drive circuit 20. When the movable mirror 5 is raised and the shutter 6 is opened, a subject image is formed on the silver halide film 7 and is exposed. The CPU 27 calculates the aperture value and the shutter speed of the aperture 2 for obtaining the proper exposure based on the subject luminance value output from the signal processing circuit 22 and the film sensitivity detected by a film sensitivity detection circuit (not shown). 6 is drive-controlled at the calculated shutter speed.

A magnetic recording layer is formed on the silver halide film 7, and a magnetic head 8 is arranged so as to be in contact with the magnetic recording layer. The magnetic head 8 has a function of magnetically recording various kinds of information and a function of reading out information magnetically recorded on the film, and the magnetic head drive circuit 9 controls writing and reading. Further, a film drive circuit 10 is provided in the camera body, and the film 7 is wound up for cueing when the film 7 is loaded into the camera, and the film 7 is wound up when one frame is shot. Then, after the film 7 has been photographed for all the frames, or when a forced rewind button (not shown) is operated, the entire feeding related to the rewinding operation is controlled. The magnetic recording by the magnetic head 8 is performed during this feeding operation.
The camera is provided with a strobe circuit 25 for illuminating the subject, and when the subject brightness is lower than a predetermined brightness, the CPU 27
, The light emission operation is performed as auxiliary light. The switch input block 28 includes a plurality of switches such as an operation switch (not shown) and a switch for detecting the operation of a mechanical mechanism.

The signal processing circuit 22, the strobe circuit 25, the nonvolatile memory 26, the video memory 21,
Signal processing circuit 22, CPU 27, magnetic head drive circuit 9, film drive circuit 10, shutter drive circuit 20,
The line sensor drive circuit 19, the mirror drive circuit 18, the aperture drive circuit 12, and the zoom / focus drive circuit 11 are connected by a data bus 24 to exchange data. The operation of these drive circuits is controlled by the CPU 27.

FIG. 2 is a perspective view of a camera according to the present invention. In the figure, reference numeral 33 denotes a camera body 33; 35, a photographing lens barrel including positive and negative lenses 1, 3 and an aperture 2; 34, a zoom up / down operation button; 37, a strobe housed in the body; A release button, 36 is a power switch, 40 is a color LCD panel (2 in FIG. 1) for monitoring an electronic image captured by the electronic imaging device.
3). Press buttons 42, 43, 44
The electronic dial 41 is an operation member for setting camera information. The push button 42 is a switching button for switching the exposure mode, and for example, switches among a program mode, an aperture priority mode, a shutter speed priority mode, and the like. The push button 43 is a switching button for switching a photographing mode, and switches between a mode in which the silver halide photographing device and the electronic imaging device are simultaneously operated and a mode in which only the electronic imaging device is operated. The push button 44 is a button for setting a bracket mode.
And bracket mode 2 are switched. The electronic dial 41 is
This is for manually setting an exposure correction value, an aperture value, a shutter speed value, and the like.

Next, FIGS. 3 and 4 show examples of electronic images obtained by applying the present invention. FIG. 3 shows a plurality of electronic signals obtained by subjecting an image signal of a subject obtained by the electronic imaging apparatus of the present invention to the luminance correction of the present invention in addition to the conversion characteristics of the imaging apparatus, the silver halide film, and the monitor. An image is shown. The conversion characteristics are disclosed by the present applicant in Japanese Patent Application No. 8-250361, and the description is omitted. First, a mode is set in which only the electronic imaging device is operated by operating the push button 43,
To set the camera to bracket mode 1. Next, when the release button 38 is pressed, a standard image (A) as an appropriate exposure based on the calculation of the CPU 27, and an under-image (B) displayed darker by a predetermined amount from the image (A) based on the exposure correction value. And an over image (C) displayed brighter by a predetermined amount than this image (A)
It is displayed on the monitor 23. The camera operator may select (A)
Obtaining an image according to the intention by selecting an image that matches the user's intention with reference to the images of (B) and (C) and determining the amount of exposure correction in the subsequent silver halide photography Can be.

FIG. 4 shows that the depth of field is changed.
FIG. 5 shows a plurality of electronic images obtained by changing the aperture 2 and capturing images at three levels of aperture values. In the same manner as above, the camera operator first operates the push button 43 to set the mode to operate only the electronic image pickup device.
4 is operated to set the camera to the bracket mode 2.
Next, when the release button 38 is pressed, an image (A ′) obtained by capturing an image at a standard aperture value is recorded in the first image capturing operation, and a predetermined amount of aperture (A ′) is recorded in the next image capturing operation. (B) obtained by closing and taking an image
'), And further, images (C') obtained by opening the aperture by a predetermined amount from the standardly set aperture in the next imaging operation are recorded, and these are displayed on the LCD monitor 23. Is done. The camera operator is (A ')
By looking at the images (B ′) and (C ′), an image suitable for the photographing intention is selected, and the aperture value for the subsequent silver halide photographing is determined. In the present embodiment, three imagings are performed by changing the aperture value. However, an image signal obtained by one imaging can be displayed by adjusting the degree of blurring by image processing. It is.

Next, the operation of the embodiment of the present invention configured as described above will be described with reference to the flowchart shown in FIG. First, when the first release (not shown) is pressed, the process proceeds to step S2. Here, the release switch of this camera is a two-stage push button, and
The release is called the second release. Next, focus adjustment is performed in step S2. In this focus adjustment, the drive amount from the interval between two images to the focus position of the photographing lens is calculated based on the output signal of the line sensor 17 to drive the photographing lens, as is known. At this time, the absolute distance to the subject is also calculated based on the number of encoder pulse signals from the reference position (for example, the position at infinity) of the taking lens. Next, in step S3, the luminance of the subject is measured based on the output from the area sensor 15, and the measured photometric value and the sensitivity of the area sensor 15 determine the imaging time and aperture for obtaining an appropriate exposure with the electronic imaging device. Calculate the value (step S
4).

Next, in step S5, it is determined whether or not the second release switch has been pressed, and if not, step S5 is repeated. On the other hand, if the second release switch has been pressed, the flow shifts to the imaging sequence of the electronic imaging device from step S6. Next, an electronic image is fetched from the area sensor 15 (step S6), a bracketing process described later is performed (step S7), and stored in the nonvolatile memory 26 (step S8). Next, the stored electronic image is displayed on the LCD monitor 23 (Step S).
9).

Next, the subroutine for taking in the area sensor image in step S6 will be described with reference to the flowchart in FIG. First, the bracket mode is determined in step S11. In the case of the bracket mode 1, the counter N is set to 1 (step S12), and in the case of the bracket mode 2, the counter N is set to 3 (step S13). That is, it is set so that one imaging operation is performed in the bracket mode 1 and three imaging operations are performed in the bracket mode 3.

Next, the diaphragm driving circuit 12 drives the diaphragm 2 so as to attain the set diaphragm value (step S1).
4). In driving the aperture, the bracket mode 2
Is set to “aperture value at which the aperture is set as a standard” and “aperture that is reduced by a predetermined amount (for example, one stop of the aperture) from the aperture value set at a standard value” for each of the three imaging operations. The aperture value is changed and set in the order of “value” and “aperture value opened by a predetermined amount (for example, one stop of aperture) from the standardly set aperture value”. Next, an electronic image is captured by the area sensor 15 (Step S).
15). The signal processing circuit 22 performs predetermined signal processing on the fetched image (step S16), converts the fetched image into an electronic image that has been converted into digital data, stores it in the video memory 21 (step S17), and decrements the counter N. Then, it is determined whether or not the counter N is 0 (step S19), and if it is 0, the subroutine ends (step S20). In step S19,
If the counter N is not 0, the mode is the bracket mode 2, so that the aperture value is reset to a different value as described above, and the sequence from step S14 is executed again.
An image signal corresponding to (B ′) · (C ′) is captured.

Next, a subroutine of the bracketing process in step S7 will be described with reference to the flowchart of FIG.
explain. First, in step S21, it is determined whether the mode is the bracket mode 1 or the bracket mode 2, and if the mode is the bracket mode 1, the process proceeds to step S22.
The following flow is executed. If the mode is the bracket mode 2, the flow from step S25 is executed. In the case of the bracket mode 1, the conversion characteristics corresponding to the film 7 loaded in the camera, the conversion characteristics of the area sensor 15,
A conversion formula is created in consideration of the conversion characteristics of the LCD monitor 23 (step S22). At this time, images (A), (B),
(C) Correction for giving a predetermined luminance difference (for example, image (A) has a luminance difference of ± 0 with respect to appropriate luminance, image (B) has a luminance difference of -1 step, and image (C) has a luminance difference of +1 step). Add coefficient.
Thereby, the images (A), (B), and (C) of FIG. 3 having different luminances are generated from one image data stored in the video memory 21 according to the conversion formula (step S2).
3) These images (A), (B) and (C) are combined and displayed on the LCD monitor 23 as shown in FIG. 8 (step S2)
4).

In the case of the bracket mode 2, similarly to the bracket mode 1, the film 7 loaded in the camera is used.
A conversion formula is created in consideration of the conversion characteristics corresponding to the above, the conversion characteristics of the area sensor 15, and the conversion characteristics of the LCD monitor 23 (step S25). By performing the imaging operation three times with the different aperture values described above, the image data of three images stored in the video memory 21 in accordance with the above-described conversion formula is converted into an image having a different degree of blur according to the aperture value in FIG. (A '), (B'), and (C ') are generated (step S26), and the images (A'), (B '), and (C') are combined to form the LCD monitor 23 as shown in FIG. (Step S27).

That is, when the camera operator wants to determine an appropriate exposure level, he or she can determine the exposure correction amount by looking at the bracket mode 1 image ((A), (B), (C) in FIG. 3). If it is desired to determine an appropriate aperture value, an image of the bracket mode 2 ((A ′), (B ′), (C
It is only necessary to determine the aperture value by looking at (1)).

As described above, the present invention provides both an electronic imaging device having an electronic imaging device for converting a subject image into an electric signal and a silver halide photographing device for projecting the subject image on a silver halide film. In the camera combined with silver halide photography and electronic imaging having the function of, with a simple configuration, whether the exposure level of the subject to be photographed on the film or the degree of blur of the background is reflected as intended by the photographer, It is possible to judge at the time of shooting. Further, since the film is not wastefully consumed, an economical camera can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a system according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the appearance of the camera in the embodiment.

FIGS. 3A and 3B are views showing a first display state in the embodiment, wherein FIG. 3A is an appropriate state, FIG. 3B is an exposure under state, and FIG. 3C is an exposure over state; It shows.

FIGS. 4A and 4B are diagrams showing a second display state in the embodiment, where FIG. 4A shows a case where the depth of field is normal and FIG.
Shows a case where the depth of field is deep, and (C) shows a case where the depth of field is shallow.

FIG. 5 is a flowchart showing the entire sequence in the embodiment.

FIG. 6 is a flowchart showing an image capturing portion in the embodiment.

FIG. 7 is a flowchart showing a bracket processing portion in the embodiment.

FIG. 8 is a diagram showing a first display state on a monitor screen in the embodiment.

FIG. 9 is a diagram showing a second display state on the monitor screen in the embodiment.

[Explanation of symbols]

 2 Aperture mechanism 13 Area sensor drive circuit 15 Area sensor 21 Video memory 22 Signal processing circuit 23 LCD monitor 40 LCD panel 41 Electronic dial 44 Bracket mode setting button

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04N 5/781 H04N 5/781 510C

Claims (4)

[Claims] An electronic imaging unit that converts a subject image into an electronic image; a silver halide photography unit that exposes the subject image to a silver halide film; and a desired imaging mode among a plurality of imaging modes in the electronic imaging unit. And an image processing unit that performs image processing on an electronic image obtained by the electronic imaging unit based on a desired imaging mode set by the imaging mode setting unit to generate a plurality of different electronic images. A silver salt photographing and electronic device comprising: an image generating means; and a monitor means for simultaneously displaying a plurality of different electronic images generated by the image generating means on the same screen for each of the desired modes. An imaging camera. 2. An electronic image pickup means for converting a subject image into an electronic image; a silver halide photographing means for exposing the subject image to a silver halide film; Imaging mode setting means for setting a first imaging mode for performing the first imaging mode and a second imaging mode for performing a plurality of imaging operations; and, when the first imaging mode is set by the imaging mode setting means, Image processing is performed on an electronic image obtained by one imaging operation to generate a plurality of different electronic images, and when the second imaging mode is set by the imaging mode setting means, the plurality of imaging operations are performed. Electronic image generating means for generating a plurality of different electronic images obtained by the operation, and a plurality of different electronic images generated by the image generating means are set by the imaging mode setting means. Silver salt photography and electronic imaging combined camera characterized by comprising a monitor unit, the simultaneously displaying on the same screen on the imaging mode each have. 3. A plurality of different electronic images generated by said electronic image generating means having different luminances when said first imaging mode is set. A camera for both silver halide photography and electronic imaging. 4. A plurality of different electronic images generated by said electronic image generating means having different aperture values when said second imaging mode is set. The camera for both silver halide photography and electronic imaging described in the above.