JPH01185532A - Camera with confirming function - Google Patents

Abstract

PURPOSE:To accomplish the confirmation of two images on the monitor of a screen by image-processing an image imprinted in a silver salt film by first shutter release and image-processing an image imprinted in an identical frame by second shutter release when photographing at a double exposure mode or at a single frame returning mode is performed. CONSTITUTION:First memory 41 and second memory 42 are provided when photographing at the double exposure mode or at the single frame returning mode is performed. The first memory 41 stores an image signal which responds to an object image image-formed in the silver salt film 26 fed from an image sensor 23b at the first shutter release. The second memory 42 stores an image signal which responds to the object image in the same way at the second shutter release. The image signals stored in the first memory 41 and in the second memory 42 are read out respectively and image-processed. The image at the first shutter release and the image at the second shutter release are overlapped each other and are displayed in the monitor 60. Thus, the overlapping condition of the two images can be confirmed by the monitor 60 when photographing is performed.

Description

[Detailed Description of the Invention] <Industrial Applications> The present invention processes an image signal that is sent from an image sensor installed in a camera to capture an image on a silver halide film, and confirms the image on a monitor. This camera is designed to be able to confirm in advance the image that will be printed on a silver halide film when photographing in double exposure mode or one-frame rewind mode.

<Conventional technology> With cameras that use silver halide film, the captured image cannot be seen until after the photographic lens is pointed at the subject and the silver halide film is chemically developed. Ta. For this reason, in recent years, it has become possible to process the image signal corresponding to the subject image formed on the silver halide film sent from an image sensor installed in the camera, and to check the image captured on the silver halide film on a monitor. A so-called camera with a confirmation function has been proposed.

<Problems to be Solved by the Invention> As described above, in the camera with the confirmation function, it is possible to confirm the image printed on the silver halide film at the time of photography on the monitor.

When shooting in double exposure mode or one-frame rewind mode with a conventional camera with a confirmation function, the image that is imprinted on the silver halide film in the first shirt release is output from the image sensor as described above. The image signals that are displayed can be processed and checked on a monitor. However, when the shutter is charged afterwards, the previous image displayed on the monitor disappears, and the image that will be imprinted on the silver halide film at the second shutter release is displayed, so the superimposed state of the two images cannot be confirmed on a monitor, and as in the past, it was not possible to confirm the overlapping state of the two images until after the silver halide film was developed.

The present invention has been made for the purpose of solving the above-mentioned problems, and it is an object of the present invention to provide a camera with a confirmation function that allows the user to check on a monitor the alignment status of two images when shooting in double exposure mode or one-frame backward mode. be.

Means for Solving the Problems> In order to solve the above problems, the present invention processes an image signal corresponding to a subject image formed on a silver halide film sent from an image sensor disposed in a camera, A camera with a confirmation function that allows you to check the image imprinted on the silver halide film on a monitor has either or both of a double exposure mode and a 1 frame rewind mode that rewinds the silver halide film by one frame. A first memory that stores an image signal corresponding to the subject image formed on the *salt film sent from the image sensor at the time of the first shirt release in exposure mode or one-frame return mode; A second memory stores an image signal corresponding to a subject image formed on a silver halide film sent from the image sensor at the time of shirt release, and reads image signals stored in the first and second memories, respectively. The present invention is characterized by comprising an image processing device that performs image processing and superimposes the image of the second shirt release on the image of the first shirt release and displays the superimposed image on the monitor.

Function> When shooting in double exposure mode or 1-frame return mode,
An image signal corresponding to the subject image is formed on the silver halide film sent from the image sensor when the shirt is released for the second time, and an image signal is formed on the silver halide film sent from the image sensor when the shirt is released for the second time. The two images are superimposed and displayed on the monitor by temporarily storing the image signal corresponding to the subject image in the memory device and then reading it out and processing the image signal in the image processing device.

Practical example Hereinafter, the present invention will be explained in detail with reference to an illustrated embodiment.

FIG. 1 is a configuration diagram showing a camera with a confirmation function according to the present invention. As shown in this figure, the lens barrel 10 is equipped with a photographing lens system 11 and an aperture 12, and the camera body 20 includes a total reflection mirror (hereinafter referred to as mirror) 21, a focal brain shutter 22, a focus plate 23, pentaprism 2
4, an eyepiece lens 25, a silver halide film 26, a double exposure button 27, a one-frame return button 28, a shutter button 29, and the like. The mirror 21 is rotatably supported by a pin 21a, and is normally in the position shown in FIG. As a result, the luminous flux A that enters through the photographic lens system 11
is reflected by the mirror 21 toward the focus plate 23 and forms an image on the focus plate 23. On the other hand, at the time of shutter release, the mirror 21 is raised by a mirror drive mechanism (not shown), and the light beam A if entering from the photographing lens system 11 is exposed and controlled by the focal plane shutter 22 and is imaged on the silver halide film 26 .

The focusing plate 23 has image sensors 23b arranged in a grid on a semi-transparent substrate 23a, as shown in FIG. 2 as seen from the mirror 21 side and FIG. The image capturing unit is formed by forming the image capturing unit. The area ratio of the image sensor 23b of the focus plate 23 and the semi-transparent part surrounding the image sensor 23b is approximately the same. In addition, in the figure,
Although the grid size of the image sensor 23b and the semi-transparent part surrounding it is roughly drawn, in reality, the image sensor 23b
The width of the translucent part is extremely narrow, the number of intersecting lines is large, and the translucent lines are minute. Therefore, the subject image formed on the focus plate 23 during photography is
For example, even if b does not transmit any light at all, it can be confirmed with the naked eye through the eyepiece lens 25 due to the subject image formed on the grid-like semitransparent substrate 23a. Image sensor 23b
includes a camera control unit 30 and a memory device 4.
0, image processing device 50. A monitor 60 is connected.

21! The exposure button 27 and the one-frame return button 28 are installed, for example, on the top of the camera body 20.

When the double exposure button 27 is pressed to set the double exposure mode, the silver halide film 26 is released after the first shirt release.
is not wound up, only shutter charging is performed, and after the second shutter release is performed, the double exposure mode is canceled. Furthermore, when the 1-frame rewind button 28 is pressed to set the 1-frame rewind mode, the M salt film 26 can be rewound by 1 frame manually or electrically, and after the shutter is charged and the shirt is released, the M salt film 26 can be rewound by 1 frame. The mode is canceled. In this way, when photographing in the double exposure mode and the one-frame return mode, the second image can be superimposed and imprinted on the first image that has been imprinted on the W1 salt film 26 in advance.

Next, the operation of the camera with a confirmation function according to the present invention will be explained. First, when the double exposure button 27 is pressed to set the double exposure mode and the shutter button 29 is released, the mirror 21 is raised and the focal plane shutter 22 is opened and closed, and an arbitrary image a (second image) is displayed on the salt film 26. 4
(see figure) will be imprinted. On the other hand, at this time, when 0N (No. 3) of the double exposure button 27 and shutter button 29 is inputted to the system control 31, a readout signal is sent to the image sensor 23b via the driver 32 in synchronization with it, and the image sensor 23b sends out an image signal corresponding to the image a imprinted on the silver halide film 26.The image signal sent out from the image sensor 23b is converted into a video signal by the signal processing circuit 33, and then sent to the A/D converter. 3
4, the signal is A/D converted and temporarily stored in the first memory 41 via the switch 35.

The image signal (digital signal) read out from the first memory 41 based on a command from the memory controller 43 is processed by the image processing device 50 and the image a is displayed on the monitor 60. Note that there is a slight difference between the image a imprinted on the silver halide film 26 and the image a displayed on the monitor due to double exposure due to the close-up time of the mirror 21 and the operating time of the focal plane shutter 22. In the present invention, where the main purpose is to confirm the positional relationship between two images, this is not a problem at all.

After this, since the double exposure mode is working, the above-mentioned 1.
After the first shirt release is performed, shutter charging is automatically performed, and settings are made so that the second shirt release can be performed subsequently. At this time, the silver halide film 26 is not rolled up and remains stationary. Next, when the system control 31 detects that the mirror 21 has returned to the predetermined position after the first shirt release, an arbitrary image b (see FIG. 4) that enters the image sensor 23b from the photographic lens system 11 is displayed. For example, the corresponding image signal is 176
It is sent out continuously at 0 sec intervals. Image sensor 2
The image signal sent from 3b is converted into a video signal by the signal processing circuit 33, A/D converted by the A/D converter 34, and temporarily stored in the second memory 42 via the switch 35. The second memory 42 has a memory control 43
Writing and reading of image signals is repeated at a cycle of 1/60 sec based on instructions from the controller. memory control 4
The switching of ffdJ a of No. 3 and the switch 35 is controlled by the system control 31. The image signal (digital signal) read out from the second memory 42 is superimposed on the image a that has already been read out from the first memory 41 by the image processing device 50 and displayed on the monitor 60 ( (See Figure 4). Image a on the monitor 60,
If the placement condition of b matches the photographer's intention, by releasing the shirt, the silver halide film 2 has already been released.
Can you superimpose a new image on both images a that have been imprinted on 6 and imprint it on the same china clay of the silver halide film 26?

In this embodiment, the image a displayed on the monitor 60 is a still image, and the image is a moving image (or a still image whose angle of view or composition may change every 1/60 sec).

Further, in this embodiment, a configuration was shown in which the output of the image sensor is converted into a video signal, A/D converted and stored in the memory, but after the output signal of the image sensor is A/D converted, it is stored in the memory. However, it goes without saying that the image may be converted into a video signal by the image processing unit after D/A conversion.

In this way, in this embodiment, when photographing in the double exposure mode, the monitor 60 monitors the image a that is imprinted on the silver halide film 26 in the first shirt release and the image that is superimposed on the second shirt release. You can check it above.

Further, in the above-mentioned embodiment, there are two images a.

b, but as shown in Figure 5, image C from the first shirt release and image d, which is duplicated on image C, are placed at arbitrary positions within the same frame. Even when doing so, you can easily adjust the positional relationship between both images while looking at the image displayed on the monitor 60. T! Be able to take pictures using light.

Further, in the above-described embodiment, shooting was performed in double exposure mode, but even when shooting in 1-frame rewind mode, the 1 [r! By pressing the return button 28, the arrangement of the two images can be confirmed on the monitor 60 as described above.

<Effects of the Invention> As specifically explained above in conjunction with the embodiments, according to the camera with the confirmation function of the present invention, when shooting in double exposure mode or one-frame return mode, the silver halide film is removed by the first shirt release. You can check the image imprinted on the same frame on the same screen as the image imprinted on the second shirt release and the image imprinted on the same piece during the second shirt release, so you can create a composition where the two images are arranged exactly as you want. images can be imprinted onto silver halide film.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing a camera with a confirmation function according to the present invention;
FIG. 2 is a plan view showing the focus plate, FIG. 3 is a sectional view taken along the line II in FIG. 2, and FIGS. 4 and 5 are explanatory diagrams showing images displayed on the monitor, respectively. In the drawing, 10 is a lens barrel, 11 is a photographing lens system, 20 is a camera body, 21 is a mirror, 22 is a focal plane shutter, 23 is a focus plate, 23b is an image sensor, 26 is a silver halide film, and 27 is a double exposure film. 28 is a one-frame rewind button, 29 is a shutter button, 30 is a camera control unit, 40 is a memory device, 50 is an image processing device, and 60 is a monitor. Patent application Agent: Fuji Photo Film Co., Ltd.

Claims (1)

[Claims] In a camera with a confirmation function that processes an image signal corresponding to a subject image formed on a silver halide film sent from an image sensor installed in the camera and confirms the image imprinted on the silver halide film on a monitor. , has either or both of a double exposure mode and a 1-frame rewind mode that rewinds the silver halide film by one frame, and the image sensor a first memory that stores an image signal corresponding to a subject image formed on a silver halide film sent from the first memory;
a second memory for storing an image signal corresponding to a subject image formed on a silver halide film sent from the image sensor at the time of a second shutter release; A camera with a confirmation function, characterized in that it is equipped with an image processing device that reads out the respective images, processes the images, superimposes the image from the first shutter release on the image from the second shutter release, and displays the superimposed image on a monitor.