JPH11215409A - Camera and finder unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate an image, from which an index is eliminated by discriminating pixels corresponding to the index from an image which is equivalent to a finder image and interpolating them, based on index position information. SOLUTION: Index position information that denotes a position at which an index in a finder image is in existence and interpolation information of peripheral pixels to interpolate the index are stored in advance in an index information section 11, in a camera that takes a silver salt photograph and generates an electronic image. When a DSC mode in which an electronic image is generated is selected, a CPU 10 supports a main mirror 15 so that a luminous flux passing through an optical system 102 forms its image on a screen 105 and gives signal charges which are generated by the luminous flux passing through the screen 105 and forms its image again on a CCD 111 to a CCD processing circuit 13 via a register. The CPU 10 reads the index position information and the interpolation information from the index recording section 11 and supplied them to a CCD processing circuit 13, where linear interpolation is applied to x-y coordinates of the pixels of the index, and the interpolated image is recorded in a recording section 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera and a finder unit for capturing an image passing through a finder optical system.

[0002]

2. Description of the Related Art Conventionally, a camera capable of taking a silver halide photograph and generating an electronic image has been proposed. For example, in Japanese Patent Application Laid-Open No. 7-287160, in a silver halide single-lens reflex camera, a subject image formed on a focusing screen is re-imaged on an image sensor to display an image corresponding to a finder screen on a monitor screen. A system is disclosed.

FIG. 11 is a diagram showing a configuration example of a conventional camera of this type. In the figure, a photographing optical system 102 is arranged in a lens barrel 101, and a half mirror 104 is arranged in the camera body 103 on the optical axis of the photographing optical system 102. In the camera body 103, the focusing screen 1
05, condenser lens 106 and pentaprism 1
07, and the reflection direction of the pentaprism 107 is
A half mirror 108 and an eyepiece 109 are provided. Further, a re-imaging optical system 110 and a CCD 111 are arranged in the reflection direction of the half mirror 108.

In the camera body 103, a sub-mirror 112, a shutter 113 and a film 114 are arranged on the optical axis of the photographing optical system 102, and an AF sensor 115 is arranged in a reflection direction of the sub-mirror 112. Further, a CPU 116 is connected to the AF sensor 115.

In the camera having such a configuration, the light beam that has passed through the photographing optical system 102 of the lens barrel 101 is reflected by the half mirror 104, and is reflected by the focusing screen 10.
Form an image on 5. Focusing screen 105
After passing through the condenser lens 106, the image is turned into an erect image by the pentaprism 107, and then guided to the eyepiece lens 109 and the re-imaging lens 110 via the half mirror 108. The image guided to the eyepiece 109 reaches the eyes of the photographer as a finder screen, and the image guided to the re-imaging lens 110 is re-imaged on the CCD 111.

That is, in the camera shown in FIG.
11, an image corresponding to the finder screen is generated. When a release button (not shown) is pressed,
The sub-mirror 112 retracts out of the optical path, and the shutter 113
Is opened, and the film 114 is exposed. By the way, an index such as an AF point mark is engraved on the diffusion surface of the focusing screen 105, and such an index is displayed as a finder screen together with a subject image.
That is, the image generated by the CCD 111 includes the index, and cannot be used as it is as an image corresponding to the subject image.

[0007] Therefore, Japanese Patent Application Laid-Open No. 7-287160 describes in an embodiment that an AF point mark is recognized from an image generated by the CCD 111 and digitally deleted.

[0008]

However, Japanese Patent Application Laid-Open No. Hei 7-2
No. 87160 does not disclose any specific method for recognizing an AF point mark and no specific method for deleting an AF point mark.

For example, as a method of recognizing an AF point mark, a predetermined AF point mark color (usually,
Black. ) May be extracted. However, in such a method, a portion of the subject image that matches the color of the AF point mark is erroneously deleted, so that the image may break down.

[0010] By the way, with the recent multi-functionalization of cameras, the indices in the viewfinder screen have been diversified. For example, the finder optical system of a single-lens reflex camera has an index indicating a ranging range or an index indicating a photometry range, and the finder optical system of a camera having a so-called panorama shooting function indicates an imaging range in a panorama mode. Has an index. In addition, the finder optical system of the APS (Advanced Photo System) -compatible camera has an index indicating the photographing range because any one of the three photographing ranges is selected by the photographer.

Further, in a camera having a replaceable focusing screen, a focus screen on which an index indicating a grid, an index indicating a scale line, or the like may be mounted. In a camera such as a compact camera in which the photographing optical system and the viewfinder optical system are completely different, the shooting range that can be observed on the viewfinder screen varies depending on the shooting distance due to parallax. Has multiple indices.

Therefore, when an image corresponding to the above finder screen is generated, it is desirable to delete all such indices. However, Japanese Patent Application Laid-Open
In Japanese Patent No. 287160, only the deletion of the AF point mark is described, and there is no description about the case where a plurality of indexes exist. Therefore, the present invention according to claims 1 to 3 provides a camera capable of reliably determining a position where an index is present from an image corresponding to a finder screen and reliably generating an image in which the index is deleted. The purpose is to do.

Further, according to the present invention, it is possible to reliably determine the position where the index exists from the image corresponding to the finder screen and to surely generate the image from which the index is deleted. It is an object to provide a finder unit. In particular, an object of the present invention is to provide a camera that can reliably generate an image with an index removed even when there are a plurality of types of indexes included in the finder optical system. I do.

[0014] Further, the invention according to claim 6 provides a finder unit which can surely generate an image from which an index has been deleted even when there are a plurality of types of indexes included in the finder optical system. The purpose is to:

[0015]

According to a first aspect of the present invention, there is provided a camera which captures an image passing through a photographic optical system, a finder optical system having an index in a finder screen, and an image passing through the finder optical system. Imaging means for generating an image to be displayed, information storage means for holding index position information indicating a position of an index in the finder screen, and an image corresponding to the finder screen generated by the imaging means based on the index position information. Image processing means for determining a pixel corresponding to the index and interpolating a value of the pixel corresponding to the index to generate an image in which the index is deleted.

According to a second aspect of the present invention, in the camera according to the first aspect, the information storage means is used when interpolating a value of each pixel corresponding to the index among pixels around the index. The image processing unit holds interpolation information indicating a position of a pixel to be extracted, extracts a value of a pixel indicated by the interpolation information from an image corresponding to a finder screen generated by the imaging unit, and indicates an index based on the extracted pixel value. Is interpolated by the value of the pixel corresponding to.

That is, in the camera according to the second aspect,
For example, when the index is a straight line in the horizontal direction, it is possible to hold optimal interpolation information according to the shape of the index, such as using the position of a pixel vertically adjacent to the index as interpolation information. According to a third aspect of the present invention, in the camera according to the first or second aspect, when the finder optical system has at least one of a plurality of predetermined indices, each of the plurality of indices is provided. Based on the identification information corresponding to the index information, the finder optical system is provided with index identification means for identifying the index, the information storage means, the held information is associated with each of the plurality of indexes, the image processing means And referencing information associated with the index identified by the index identifying means from the information held in the information storage means.

The finder unit according to claim 4 is
A finder unit attached to a single-lens reflex camera, and a finder optical system having an index in a finder screen and an image passing through the finder optical system,
Imaging means for generating an image corresponding to a finder screen;
Information storage means for holding index position information indicating the position where the index in the finder screen is present, and determining a pixel corresponding to the index from an image corresponding to the finder screen generated by the imaging means based on the index position information, Image processing means for generating an image in which the index is deleted by interpolating the value of the pixel corresponding to the index.

The finder unit according to claim 5 is
5. The finder unit according to claim 4, wherein the information storage unit holds interpolation information indicating a position of a pixel to be used when interpolating a value of each pixel corresponding to the index among pixels around the index. The image processing unit extracts a value of a pixel indicated by the interpolation information from an image corresponding to the finder screen generated by the imaging unit, and interpolates a value of a pixel corresponding to an index based on the value of the extracted pixel. Features.

That is, in the finder unit according to the fifth aspect, for example, when the index is a straight line in the horizontal direction, the position of a pixel adjacent to the index in the vertical direction is used as interpolation information. Optimal interpolation information corresponding to the information can be held.

The finder unit according to claim 6 is
6. The finder unit according to claim 4, wherein at least one of a plurality of predetermined indices is selected.
In the case where the finder optical system has one index, based on identification information corresponding to each of the plurality of indexes, the finder optical system is provided with index identification means for identifying the index of the finder optical system. The image processing unit is associated with each of the plurality of indices, and the image processing unit refers to information associated with the indices identified by the index identification unit, among the information held in the information storage unit. .

[0022]

Embodiments of the present invention will be described below in detail with reference to the drawings. As an embodiment of the present invention, a single-lens reflex camera or a camera system capable of recording an image corresponding to a finder screen is used. FIG. 1 is a diagram illustrating the configuration of the first embodiment.

This embodiment corresponds to an embodiment corresponding to the first and second aspects of the present invention. 1, components having the same functions as those in FIG. 11 are denoted by the same reference numerals. The difference between the configuration of FIG. 11 and FIG.
A CPU 10 is provided instead of the CPU 116 in FIG.
Index information recording unit 11, recording medium changeover switch 12,
A CCD processing circuit 13 and a recording unit 14 (for example, a flash memory) are newly provided.
4 in that a main mirror 15 is provided in place of 4. Here, the index information recording unit 11, the recording medium changeover switch 12, the CCD processing circuit 13, and the recording unit 14
The CCD processing circuit 13 is connected to the CCD 111 in addition to the CPU 10.

Incidentally, the recording medium changeover switch 12
Is provided on the housing of the camera body 103, and is set in a Film mode (a mode for taking a silver halide photograph) and D by the photographer.
The mode is switched between the SC mode (mode for generating an electronic image).

In FIG. 1, reference numeral 15a denotes a state in which the main mirror 15 is retracted outside the optical path, and 112a denotes
This shows a state in which the sub-mirror 112 has retracted outside the optical path. It should be noted that the correspondence between the first and second aspects of the present invention and the present embodiment is as follows.
2, the image pickup means corresponds to the CCD 111, the information storage means corresponds to the index information recording section 11, and the image processing means corresponds to the CCD processing circuit 13. The finder optical system includes a focusing screen 105, a condenser lens 106, a pentaprism 107, a half mirror 10
8, corresponds to the eyepiece lens 109 and the re-imaging optical system 110.

FIG. 2 is a diagram showing a display example of a finder screen. In FIG. 2, indices 30a to
Reference numeral 30e denotes an index indicating a distance measurement range, and an index 31 indicated by a circle is an index indicating a photometry range of center-weighted photometry. Note that FIG. 2 shows that the focus is on a subject in the range of measurement selected by the photographer among the five ranges of measurement indicated by the indices 30a to 30e. Also, when the center-weighted metering mode is selected by the photographer, the exposure is determined with emphasis on the photometric result of the subject in the index 31.

FIG. 3 is a diagram showing a configuration example of the CCD.
In FIG. 3, the CCD 111 includes a plurality of pixels 32 arranged in a two-dimensional matrix, a plurality of vertical registers 33 provided corresponding to each column of the pixels 32, and a horizontal register 34. . In the present embodiment, the CCD 111 has a RGB color filter arranged in a Bayer array.

FIG. 4 is a diagram showing an interpolation method. FIG.
In (A), the finder screen is shown, and (B) is
Part of the index indicating the distance measurement range in (A) is enlarged to show the relationship between the plurality of pixels 32 of the CCD 111 shown in FIG. 3 and the index. Further, (1) to (3) in the figure show specific examples of linear interpolation described later.

In the present embodiment, the index position information indicating the position where the index exists in the finder screen and the interpolation information indicating the positions of the peripheral pixels to be used when interpolating the index are set in advance in the index information. It is stored in the recording unit 11.
For example, the index position information is the xy coordinates of the pixel 41 and the xy coordinates of the pixel 51 in FIG. The pixel 41
Is the xy coordinates of the pixels 42 and 43 and the xy coordinates of the pixels 44 and 45, and the interpolation information for the pixel 51 is the xy coordinates of the pixels 52 and 53.

FIG. 5 is an operation flowchart of the first embodiment. Hereinafter, the operation of the first embodiment will be described with reference to FIGS. When the CPU 10 recognizes that the DSC mode (mode for generating an electronic image) is selected by the photographer via the recording medium changeover switch 12, the luminous flux passing through the photographing optical system 102 of the lens barrel 101 is converted to a focusing screen 105. The main mirror 15 is held at the position of 15 in FIG. 1 so that an image is formed (the mirror is not raised) (S1 in FIG. 5).

The CPU 10 includes a CCD processing circuit 13
Drive. By the way, in the present embodiment, the image transmitted through the focusing screen 105 is re-imaged on the CCD 111 as in the related art. In the CCD 111, the signal charge generated by each pixel 32 is transferred to a vertical register 33,
It is supplied to the processing circuit 13. That is, an image corresponding to the finder screen is supplied to the CCD processing circuit 13.

The CCD processing circuit 13 records the image thus supplied on the recording unit 14 (S2 in FIG. 5). C
The PU 10 reads the above-described index position information and interpolation information from the index information recording unit 11 (S3 in FIG. 5), and supplies them to the CCD processing circuit 13.

The CCD processing circuit 13 performs linear interpolation of each pixel corresponding to the index based on the index position information and the interpolation information supplied in this way (S4 in FIG. 5). For example, the CCD processing circuit 13 outputs the index position information as shown in FIG.
When the xy coordinates of the pixel 41 shown in (B) are supplied, and the xy coordinates of the pixels 42 and 43 and the xy coordinates of the pixels 44 and 45 are supplied as interpolation information, the graph shown in FIG. As shown in FIG.
Linear interpolation in the y direction is performed as shown in the graph of (2). When the linear interpolation between the x direction and the y direction is performed, C
The CD processing circuit 13 averages the x-direction interpolation value and the y-direction interpolation value to obtain the interpolation value of the pixel 41.

When the xy coordinates of the pixel 51 shown in FIG. 4B are supplied as index position information and the xy coordinates of the pixels 52 and 53 are supplied as interpolation information, the CCD processing circuit 13 shown in FIG. As shown in the graph of (3), linear interpolation in the x direction is performed, and the interpolation value in the x direction is set as the interpolation value of the pixel 51. The CCD processing circuit 13 records the thus obtained interpolation value of each pixel in the recording unit 14 (S5 in FIG. 5).

That is, in the present embodiment, by storing the index position information and the interpolation information in the index information recording section 11, the linear interpolation of each pixel corresponding to the index can be reliably performed. Therefore, according to the present embodiment, the index can be easily deleted from the image corresponding to the finder screen.

In this embodiment, the position of a pixel used when performing linear interpolation is stored as interpolation information in association with each pixel corresponding to an index.
When pixels used when performing linear interpolation in the y direction are distant as in the pixel 51 shown in FIG. 4B, only the linear interpolation in the x direction is performed. Linear interpolation can be performed.

FIG. 6 is a diagram showing the configuration of the second embodiment. This embodiment corresponds to an embodiment to which the invention described in claim 3 is applied, and includes a focusing screen 1.
05 is a camera exchanged by the photographer. 6, components having the same functions as those in FIG. 1 are denoted by the same reference numerals. The difference between the configurations shown in FIGS. 1 and 6 is that
Instead of the CPU 10 and the index information recording unit 11 in FIG.
The difference is that a PU 60 and an index information recording unit 61 are provided, and an index pattern identification circuit 62 and a memory 63 are newly provided. Here, the index pattern identification circuit 62 uses CP
The memory 63 is connected to the CPU 60, and is connected to the U 60 and the focusing screen 105.

It should be noted that the correspondence between the invention described in claim 3 and the present embodiment is as follows.
2, the image pickup means corresponds to the CCD 111, the information storage means corresponds to the index information recording section 61, the image processing means corresponds to the CCD processing circuit 13, and the index identification means corresponds to the index pattern identification circuit 62. . The finder optical system includes a focusing screen 105, a condenser lens 106, a pentaprism 107, a half mirror 10
8, corresponds to the eyepiece lens 109 and the re-imaging optical system 110.

FIG. 7 is a diagram showing a connection relationship between the index pattern identification circuit and the focusing screen. FIGS. 7A to 7C show examples of focusing screen index patterns that can be exchanged by the photographer. In the present embodiment, it is assumed that three types of focusing screens 105a to 105c are interchangeable.

Three types of focusing screens 105
a to 105c respectively include conductor patterns 64a to 64c
Is provided, and the index pattern identification circuit 62 acquires 3-bit identification information corresponding to each of the conductor patterns 64a to 64c via three contacts 65 to 67.

By the way, in the index information recording section 61, all focusing screens 105 (here, corresponding to 105a to 105c) which can be exchanged by the photographer are stored.
The index position information and the interpolation information are stored in association with each other. In the present embodiment, it is assumed that the index position information and the interpolation information are stored in association with the 3-bit identification information corresponding to the conductor patterns 64a to 64c shown in FIG.

FIG. 8 is an operation flowchart of the second embodiment. Hereinafter, the operation of the second embodiment will be described with reference to FIGS. When the CPU 60 recognizes that the photographer has selected the DSC mode (mode for generating an electronic image) via the recording medium changeover switch 12, the luminous flux passing through the photographing optical system 102 of the lens barrel 101 is changed to the focusing screen 105. The main mirror 15 is held at the position of 15 in FIG. 6 so that an image is formed (the mirror is not raised) (S1 in FIG. 8).

The CPU 10 drives the index pattern identification circuit 62. The index pattern identification circuit 62 is configured as shown in FIG.
, Identification information is acquired based on the contact state of the three contacts 65 to 67, and the focusing screen 1 is obtained.
05 are identified (S2 in FIG. 8). In addition, the index pattern identification circuit 62 converts the identification information thus obtained into a CP
Notify U60.

The CPU 60 includes an index pattern identification circuit 62
Is notified of the identification information, the identification information is recorded in the memory 63 (S3 in FIG. 8). Such processing (FIG. 8)
In the process of S1 to S3), the CCD 111 transfers the signal charges generated by the pixels 32 to the vertical register 33, and transfers the signal charges to the CCD 33 via the horizontal register 34.
It is supplied to the processing circuit 13. That is, an image corresponding to the finder screen is supplied to the CCD processing circuit 13.

The CCD processing circuit 13 records the image thus supplied on the recording unit 14 (S4 in FIG. 8). C
The PU 60 reads the index position information and the interpolation information corresponding to the identification information recorded in the memory 63 from the index information recording unit 61 (S5 in FIG. 8), and supplies them to the CCD processing circuit 13.

The CCD processing circuit 13 performs linear interpolation of each pixel corresponding to the index based on the index position information and the interpolation information supplied in the same manner as in the first embodiment (FIG. 9). 8S6). Further, the CCD processing circuit 13
Records the interpolation value of each pixel in the recording unit 14 in the same manner as in the first embodiment (S7 in FIG. 8).

That is, in the present embodiment, the type of the focusing screen 105 can be identified, and linear interpolation of pixels corresponding to the index of each focusing screen 105 can be performed. Therefore, even when the focusing screen 105 is replaced by the photographer, the index can be reliably deleted from the image corresponding to the finder screen.

In each of the above-described embodiments, the description has been made using a single-lens reflex camera. However, the present invention is not limited to such a camera. The present invention can be applied to a camera having a different optical system. FIG. 9 is a diagram illustrating the configuration of the third embodiment. This embodiment is an embodiment to which the invention described in claims 4 to 6 is applied, and is a camera system including a finder unit (hereinafter, referred to as a DSC finder) capable of recording an image corresponding to a finder screen. It is.

In FIG. 9, components having the same functions as those in FIGS. 6 and 11 are denoted by the same reference numerals. Note that FIG.
6 and FIG. 11 is that the camera body 103 in FIG. 6 and FIG. 11 is divided into a DSC finder 70 and a camera body 71, and a DSC switch 72 is used instead of the recording medium changeover switch 12 in FIG. Is provided, and the CPU 73 is provided in the DSC finder 70.

Here, the DSC finder 70 has a CPU
73, focusing screen 105, condenser lens 106, pentaprism 107, half mirror 10
8, eyepiece 109, re-imaging optical system 110, CCD1
11, a CCD processing circuit 13, a recording unit 14, an index information recording unit 61, an index pattern identification circuit 62, a memory 63, and a DSC switch 72.
U116, main mirror 15, sub mirror 112, shutter 113, film 114, and AF sensor 115
Having.

The CPU 7 in the DSC finder 70
3 and the CPU 116 in the camera body 71
4, 75 are connected. The DSC switch 72 is provided on the housing of the DSC finder 70, and the photographer selects whether or not to generate an electronic image. It should be noted that the correspondence between the invention described in claims 4 to 6 and the present embodiment is as follows.
1, the information storage means corresponds to the index information recording unit 61, the image processing means corresponds to the CCD processing circuit 13, and the index identification means corresponds to the index pattern identification circuit 62. The finder optical system is a focusing screen 1
05, condenser lens 106, pentaprism 10
7, a half mirror 108, an eyepiece 109, and a re-imaging optical system 110.

FIG. 10 is an operation flowchart of the third embodiment. Hereinafter, the operation of the third embodiment will be described with reference to FIGS. 9 and 10. Each time the photographing operation is started, the CPU 73 determines whether or not the DSC switch 72 is turned “ON” (S1 in FIG. 10). Upon recognizing that the DSC switch 72 has been turned “ON” (corresponding to a request to generate an electronic image) by such a determination (YES in FIG. 10S1), the CPU 73 instructs the CPU 116 in the camera body 71 to. On the other hand, it notifies that the generation of the electronic image has been requested.

When notified that the generation of the electronic image has been requested, the CPU 116 converts the light beam passing through the photographing optical system 102 of the lens barrel 101 into the focusing screen 1.
9 so as to form an image at 05 in FIG.
(Not mirror-up) (FIG. 10S
2). Further, the CPU 73 controls the index pattern identification circuit 62
Drive.

The index pattern identification circuit 62 identifies the type of the focusing screen 105 as in the second embodiment (S3 in FIG. 10), and notifies the CPU 73 of the identification information of the focusing screen 105. CPU73
When the identification information is notified by the index pattern identification circuit 62, the identification information is recorded in the memory 63 as in the second embodiment (S4 in FIG. 10).

While such processing (S1 to S4 in FIG. 10) is being performed, an image corresponding to the finder screen is supplied to the CCD processing circuit 13 in the same manner as in the second embodiment. The CCD processing circuit 13 records the image supplied in this way in the recording unit 14 (S5 in FIG. 10).

The CPU 73 reads the index position information and the interpolation information corresponding to the identification information recorded in the memory 63 from the index information recording section 61 (S6 in FIG. 10) and supplies them to the CCD processing circuit 13. Based on the index position information and the interpolation information supplied in this way, the CCD processing circuit 13
Linear interpolation of each pixel corresponding to the index is performed in the same manner as in the first embodiment (S7 in FIG. 10).

The CCD processing circuit 13 records the interpolated value of each pixel in the recording unit 14 in the same manner as in the first embodiment (S8 in FIG. 10). That is, in the present embodiment, the DSC
Under the control of the CPU 73 in the finder 70, an image corresponding to the finder screen can be generated independently of the camera body 71, and linear interpolation of pixels corresponding to the indices of the respective focusing screens 105 can be performed.

Therefore, according to the present embodiment, it is possible to reliably generate an electronic image in which the index is deleted only by replacing the finder unit with the DSC finder without changing the hardware configuration in the existing camera body. Can be. By the way, when the DSC switch is “OFF” or when a normal finder unit is mounted on the camera body 71 instead of the DSC finder 70,
Since the request for generation of the electronic image is not notified to the CPU 116, the camera body 71 can take a silver halide photograph according to a normal procedure.

In each of the above embodiments, the value of the pixel around the index is used when performing interpolation.
An interpolation value of a pixel for which interpolation has already been completed may be used. Further, in each of the above-described embodiments, the interpolation value of the pixel corresponding to the index is obtained by linear interpolation. However, the present invention is not limited to such an interpolation method, and any interpolation method may be applied.

Further, in each of the embodiments described above, the description has been made using a single-lens reflex camera or a camera system capable of taking a silver halide photograph. However, the present invention is not limited to such a camera. It can also be applied to electronic still cameras.

[0061]

According to the first and second aspects of the present invention, as described above.
In the invention described in (1), since the index position information is held in advance, it is possible to reliably determine the position where the index exists from the image corresponding to the finder screen, and to interpolate the value of the pixel corresponding to the index. Thus, an image from which the index has been deleted can be reliably generated.

According to the second and fifth aspects of the present invention, since interpolation information is held in advance, it is possible to reliably extract the value of a pixel used for interpolation, and to use an index based on the extracted value. Can easily be interpolated. According to the third and sixth aspects of the present invention, index position information and interpolation information are held in advance in association with each of the plurality of indices, and the index of the finder optical system can be identified based on the identification information. Therefore, even when the index is changed, an image in which the index is deleted can be easily generated.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a first embodiment.

FIG. 2 is a diagram showing a display example of a finder screen.

FIG. 3 is a diagram illustrating a configuration example of a CCD.

FIG. 4 is a diagram showing an interpolation method.

FIG. 5 is an operation flowchart of the first embodiment.

FIG. 6 is a diagram illustrating a configuration of a second embodiment.

FIG. 7 is a diagram showing a connection relationship between an index pattern identification circuit and a focusing screen.

FIG. 8 is an operation flowchart of the second embodiment.

FIG. 9 is a diagram showing a configuration of a third embodiment.

FIG. 10 is an operation flowchart of the third embodiment.

FIG. 11 is a diagram illustrating a configuration example of a conventional camera.

[Explanation of symbols]

10, 60, 73, 116 CPU 11, 61 Index information recording section 12 Recording medium changeover switch 13 CCD processing circuit 14 Recording section 15 Main mirror 30, 31 Index 32, 41, 42, 43, 44, 45, 51, 52, 5
3 pixel 33 vertical register 34 horizontal register 62 index pattern identification circuit 63 memory 64 conductive pattern 65, 66, 67, 74, 75 contacts 70 DSC finder 71, 103 camera body 72 DSC switch 101 lens barrel 102 shooting optical system 104, 108 Half mirror 105 Focusing screen 106 Condenser lens 107 Pentaprism 109 Eyepiece 110 Reimaging optical system 111 CCD 112 Submirror 113 Shutter 114 Film 115 AF sensor

Claims (6)

[Claims] A photographing optical system; a finder optical system having an index in a finder screen; an imaging means for capturing an image passing through the finder optical system to generate an image corresponding to the finder screen; An information storage unit that holds index position information indicating a position where the index is present, and a pixel corresponding to the index is determined from an image corresponding to a finder screen generated by the imaging unit based on the index position information, An image processing means for generating an image in which the index is deleted by interpolating a value of a pixel corresponding to the index. 2. The camera according to claim 1, wherein the information storage unit is configured to use a position of a pixel to be used when interpolating a value of each pixel corresponding to the index among pixels around the index. The image processing unit extracts a value of a pixel indicated by the interpolation information from an image corresponding to a finder screen generated by the imaging unit, and based on the value of the extracted pixel, A camera which interpolates a value of a corresponding pixel. 3. The camera according to claim 1, wherein when the finder optical system has at least one of a plurality of predetermined indices, each of the plurality of indices corresponds to each of the plurality of indices. An index identification unit that identifies an index included in the finder optical system based on the identification information; the information storage unit associates the held information with each of the plurality of indices; A camera which refers to information associated with the index identified by the index identifying means, from information held in the information storage means. 4. A finder unit mounted on a single-lens reflex camera, comprising: a finder optical system having an index in a finder screen; and an image passing through the finder optical system being taken, and an image corresponding to the finder screen being taken. Imaging means for generating, information storage means for holding index position information indicating a position of an index in the finder screen, and an image corresponding to the finder screen generated by the imaging means based on the index position information. A finder unit comprising: image processing means for determining a pixel corresponding to an index and interpolating a value of the pixel corresponding to the index to generate an image in which the index is deleted. 5. The finder unit according to claim 4, wherein the information storage means includes a pixel to be used when interpolating a value of each pixel corresponding to the index among pixels around the index. Holding the interpolation information indicating the position, the image processing means extracts the value of the pixel indicated by the interpolation information from the image corresponding to the finder screen generated by the imaging means, and the index based on the value of the extracted pixel A finder unit, which interpolates the value of a pixel corresponding to. 6. The finder unit according to claim 4, wherein when the finder optical system has at least one of a plurality of predetermined indices, each of the plurality of indices corresponds to the plurality of indices. An index identification unit that identifies an index included in the finder optical system based on the identification information to be performed. In the information storage unit, the held information is associated with each of the plurality of indexes, and the image processing unit Wherein the finder unit refers to information associated with the index identified by the index identification means, among information held in the information storage means.