JP5948232B2 - Imaging device - Google Patents

Description

  The present invention relates to an imaging device equipped with a finder device.

  There has been proposed a camera having a viewfinder device including an optical viewfinder capable of observing a subject through a viewfinder optical system and a display unit capable of superimposing an image on an optical image of the optical viewfinder (see Patent Documents 1 and 2).

  In Patent Documents 1 and 2, for example, half of an optical image passing through a finder optical system of a finder device is shielded, and imaging obtained by imaging a subject with an imaging element in a display area of a display unit corresponding to the shielded part. There has been disclosed a method in which an image that is viewed from an eyepiece window of a finder device is displayed as an image, and a captured image of a subject and an optical image of the subject are stitched together.

  Patent Document 1 also describes displaying an image with a changed white balance gain as a captured image of a subject. By doing so, it is possible to perform shooting while comparing the image after the white balance adjustment and the image before the white balance adjustment (an optical image of the subject), so that convenience can be improved.

JP 2012-65294 A JP 2012-63722 A

  As in Patent Document 1, even if a joint image of a captured image and an optical image after white balance adjustment is visible from the eyepiece window of the viewfinder device, the light-shielded portion and the light-shielded portion of the optical image are not shielded. In the case where the colors are different from each other, it may not be possible to determine whether the white balance is appropriate.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an imaging apparatus capable of intuitively adjusting white balance before photographing.

An imaging apparatus according to the present invention includes an imaging element that images a subject through an imaging optical system, a finder window into which subject light is incident, a display unit that displays an image, and an eyepiece window, and the subject that has entered from the finder window A finder device configured to be able to observe an image in which a light image and an image displayed on the display unit are superimposed from the eyepiece window, and an observation image which is an image observed from the eyepiece window. An image in one of the first area and the second area is divided into the first area and the second area excluding the plurality of first areas. The image based on the data corresponding to the one area in the captured image data after the white balance adjustment process obtained by imaging the subject by the above or an image corresponding to the image, the first area and State whose serial images in the other areas of the second area, and a control unit that performs control for the image corresponding to the object light image or the subject optical image, by dividing the observed image in a grid pattern among the divided areas in each divided areas are arranged in a checkered pattern is shall be set as the first area.

  According to the present invention, it is possible to provide an imaging apparatus capable of intuitively performing white balance adjustment before photographing.

1 is an external perspective view of a digital camera 100 as an imaging apparatus for describing an embodiment of the present invention. 1 is an internal block configuration diagram of the digital camera 100 shown in FIG. The figure which shows the state at the time of WB adjustment mode setting in the liquid-crystal shutter 62 shown in FIG. The figure which shows the to-be-photographed object light image which injects from the to-be-photographed object finder window 16 of the digital camera 100 shown in FIG. The figure which shows the image which the liquid crystal shutter of the state of FIG. The figure which shows the observation image seen from the eyepiece window 17 in WB adjustment mode of the digital camera shown in FIG. The flowchart for demonstrating the operation | movement at the time of WB adjustment mode of the digital camera shown in FIG. The figure which shows the modification of the state at the time of WB adjustment mode of the liquid-crystal shutter 62 shown in FIG. The figure which shows the modification of the state at the time of WB adjustment mode of the liquid-crystal shutter 62 shown in FIG. The figure which shows the modification of the state at the time of WB adjustment mode of the liquid-crystal shutter 62 shown in FIG. The figure for demonstrating the modification which produces | generates an observation image without using the liquid-crystal shutter 62 in the digital camera shown in FIG. The figure for demonstrating the modification which produces | generates an observation image without using the liquid-crystal shutter 62 in the digital camera shown in FIG. The figure for demonstrating another modification which produces | generates an observation image, without using the liquid-crystal shutter 62 in the digital camera shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is an external perspective view of a digital camera 100 as an imaging apparatus for explaining an embodiment of the present invention.

  The digital camera 100 includes a rectangular housing 11. A lens barrel 12 is provided at the front center of the housing 11. An imaging optical system 13 is accommodated in the lens barrel 12.

  A shutter button 14 is provided on one side of the upper end surface of the housing 11. A finder device 15 is provided at a corner of the upper end surface of the housing 11 opposite to the shutter button 14. The subject-side finder window 16 of the finder device 15 is provided at a corner on the front surface of the housing 11. An eyepiece window 17 of the finder device 15 is provided in a portion on the back side of the housing 11 facing the subject side finder window 16.

  FIG. 2 is an internal block diagram of the digital camera 100 shown in FIG.

  In FIG. 1, a digital camera 100 performs analog signal processing on a CCD solid-state imaging device 21a, an imaging optical system placed in front of the solid-state imaging device 21a, and an output signal (captured image signal) of the solid-state imaging device 21a. It includes a CDSAMP 25a, an analog / digital (A / D) converter 26a that converts an output signal of the CDSAMP 25a into a digital signal, a finder device 15, and an imaging optical system 13.

  The imaging optical system 13 includes a photographic lens including a focus lens 13 b and an iris (iris) 24.

  The solid-state imaging device 21a is a CCD type in the example of FIG. 2, but other types of solid-state imaging devices such as a CMOS type may be used.

  The finder device 15 includes a subject side finder window 16 that is a window through which a subject light image is incident, an eyepiece window 17, an objective optical system 65, a prism 66 having a half mirror 63 therein, and a display device 61 that displays an image. And a liquid crystal shutter 62. The objective optical system 65 and the prism 66 constitute a finder optical system.

  A liquid crystal shutter 62, an objective optical system 65, and a prism 66 are disposed in this order along the incident optical axis L of the finder device 15 between the subject side finder window 16 and the eyepiece window 17. The incident optical axis L is the optical axis of the finder optical system. Note that the liquid crystal shutter 62 may be provided between the objective optical system 65 and the prism 66. In this case, the size of the liquid crystal shutter 62 can be reduced.

  The half mirror 63 is installed at an angle of 45 degrees with respect to the optical axis L.

  The display device 61 is configured by a liquid crystal display device, for example, and is disposed adjacent to the half mirror 63 and parallel to the optical axis L. The display device 61 displays the image by transmitting the backlight light only in a portion where the image is to be displayed in the display area and not transmitting the backlight light in other portions (black display). Do.

  Thereby, in a state where no image is displayed on the display device 61, only the subject light image incident from the subject-side finder window 16 can be confirmed from the eyepiece window 17.

  Further, in a state where the image is displayed on the display device 61, an image in which the subject light image and the light emitted from the display device 61 and reflected by the half mirror 63 (EVF image displayed on the display device 61) are superimposed. Can be confirmed from the eyepiece window 17.

  The finder device 15 is a device in which the prism 66 and the display device 61 are deleted, and a see-through display device is arranged at a position where the prism 66 is located so that a display area thereof is perpendicular to the optical axis L. There may be.

  The liquid crystal shutter 62 is provided to prevent a part of the subject light image from entering the eyepiece window 17. Details of the liquid crystal shutter 62 will be described later.

  The digital camera 100 supplies a driving signal to a liquid crystal shutter driving unit 46 that drives the liquid crystal shutter 62, a motor driver 47 that supplies a driving pulse to the driving motor of the focus lens 13b, and a driving motor that controls the diaphragm 24. A motor driver 48 and a timing generator (TG) 49 that supplies a driving timing pulse to the solid-state imaging device 21a are provided. The liquid crystal shutter drive unit 46, the motor drivers 47 and 48, and the TG 49 operate based on a command from the control unit 32. Further, the CDSAMP 25a also operates based on a command from the control unit 32.

  The digital camera 100 further includes an image input controller 31 that captures a digital captured image signal output from the A / D converter 26a, a control unit 32 that performs overall control of the entire digital camera 100, and an image input controller 31. An image signal processing circuit 33 that processes captured captured image signals to generate captured image data, a memory 36 that includes a RAM used as a work memory, a ROM that stores various data, and the like, and a captured image after image processing A compression processing circuit 39 that compresses data into a JPEG image or an MPEG image, a display control unit 41, a media controller 43 that records captured image data on a recording medium 42, and a bus 44 that interconnects them are provided.

  The image processing performed by the image signal processing circuit 33 uses the captured image signal (a set of output signals of each pixel of the solid-state imaging device 21a), and the color of the red signal, the green signal, and the blue signal at the pixel position corresponding to each pixel. And a WB adjustment process for adjusting the white balance (WB) by multiplying each color signal after the synchronization process by a set gain. Note that the WB adjustment processing may be performed by analog signal processing before A / D conversion.

  The display control unit 41 displays various images on a liquid crystal display device 40 (not shown in FIG. 1) provided on the back of the camera or the like or a display device 61 in the finder device 15.

  The digital camera 100 has a WB adjustment mode in which a white balance condition can be set while simultaneously confirming a subject light image and an image captured by the solid-state imaging device 21a and subjected to the white balance adjustment process in the finder device 15. It can be set.

  An operation unit 50 including the shutter button 14 shown in FIG. 1 and a WB adjustment mode setting button (not shown) is connected to the control unit 32. Based on a user instruction input via the operation unit 50, the control unit 32 controls the digital camera 100.

  When the WB adjustment mode is set while the shooting mode is set, the control unit 32 controls a part of the liquid crystal shutter 62 to a non-transmissive state where light does not pass and controls the rest to a transmissive state where light is transmitted. To do. Note that the control unit 32 controls all the areas of the liquid crystal shutter 62 to transmit light when the shooting mode is set and the WB adjustment mode is not set.

  FIG. 3 is a diagram showing a state when the WB adjustment mode is set in the liquid crystal shutter 62 shown in FIG. FIG. 3 shows a portion that overlaps the subject light image when the liquid crystal shutter 62 is viewed in the direction of the optical axis L from the eyepiece window 17 side.

  The liquid crystal shutter 62 in the state shown in FIG. 3 divides the area overlapping the subject optical image into 16 grids, and half of the 16 divided areas are transmissive areas 62a (areas without shading) through which light passes. The other half is a non-transmission area 62b (area with shading) that does not transmit light.

  In the area overlapping the subject light image of the liquid crystal shutter 62, the transmissive area 62a and the non-transmissive area 62b are arranged in a checkered pattern. The checkered pattern refers to a shape in which regions are arranged by skipping one in the vertical direction and one in the horizontal direction.

  When the subject light image incident from the subject-side finder window 16 in the digital camera 100 shown in FIG. 1 is the one shown in FIG. 4, the display device 61 is shown in FIG. An image (observed image) seen from the eyepiece window 17 through the liquid crystal shutter 62 in the state is as shown in FIG. The observation image shown in FIG. 5 includes an area where the subject light image can be seen as it is and an area where only the non-transmission area 62 b of the liquid crystal shutter 62 can be seen.

  In the WB adjustment mode, the control unit 32 captures an image of a subject light image that has become invisible from the eyepiece window 17 due to each non-transparent region 62b in each non-transparent region 62b constituting the observation image shown in FIG. Control is performed to superimpose images based on captured image data after white balance adjustment processing obtained by imaging with the solid-state imaging device 21a.

  That is, the control unit 32 selects an image corresponding to each non-transmissive area 62b (an object overlapping each non-transmissive area 62b) among images based on the captured image data after the WB adjustment process obtained by imaging with the solid-state imaging element 21a. An image obtained by imaging a portion) is displayed in an area corresponding to each non-transparent area 62 b in the display area of the display device 61.

  FIG. 6 is a diagram showing an observation image that can be seen from the eyepiece window 17 in the WB adjustment mode. In FIG. 6, the hatched area is a part where an image displayed on the display device 61 is seen overlapping the non-transmissive area 62 b of the liquid crystal shutter 62. In FIG. 6, for easy understanding, the image displayed on the display device 61 is hatched. However, the hatching is not actually displayed. Note that the captured image displayed on the display device 61 may be displayed with a visually recognizable frame around it so that the captured image and the subject light image can be distinguished. By not displaying such a frame as shown in FIG. 6, it becomes easier to intuitively perform a white balance adjustment operation described later.

  In the WB adjustment mode, the control unit 32 causes the display device 61 to display an image 61a indicating the white balance of the image displayed in the display region corresponding to the non-transmissive region 62b of the display device 61.

  The image signal processing circuit 33 is one of a plurality of light source types such as the sun, a fluorescent lamp, and an incandescent lamp, and an R signal, a G signal, and a B signal for obtaining an optimal white balance corresponding to any one of the light source types. Data of combinations with gains to be multiplied by each is stored. When the WB adjustment mode is set, the image signal processing circuit 33 performs white balance adjustment by multiplying each color signal of the captured image signal after the synchronization processing by a gain according to this data.

  The image 61a includes an image 61c indicating a set light source type (fluorescent lamp in the example of FIG. 6) when WB adjustment is performed by the image signal processing circuit 33, and an image displayed in a display area corresponding to the non-transmissive area 62b. And an image 61b showing the color temperature. The image 61b includes a scale indicating the range of the color temperature that can be changed in the set light source type, and a triangular mark indicating where the color temperature of the currently displayed image is on the gauge.

  When the image shown in FIG. 6 can be observed from the eyepiece window 17 and an instruction to switch the set light source type is made by operating the operation unit 50, this instruction is transmitted to the image signal processing circuit 33 via the control unit 32. .

  Then, the image signal processing circuit 33 changes the gain multiplied by each color signal of the captured image signal after the synchronization processing to a gain corresponding to the light source type specified by the user. If the said instruction | indication is given, the control part 32 will perform control which switches the image 61c which shows the light source type contained in the image 61a to the image which shows the light source type designated by the user.

  Further, when an instruction to change the position of the triangular mark in the image 61b is given by the operation of the operation unit 50 in a state where the image shown in FIG. 6 can be observed from the eyepiece window 17, the image signal processing circuit 33 responds to this instruction. Then, the gain multiplied by each color signal of the captured image signal after the synchronization processing is changed to a gain corresponding to the color temperature specified by the position of the triangle mark. Further, the control unit 32 changes the image 61a to an image obtained by moving the triangle mark of the image 61b according to the instruction.

  FIG. 7 is a flowchart for explaining the operation of the digital camera shown in FIG. 1 in the WB adjustment mode.

  When the WB adjustment mode is set, the control unit 32 controls the liquid crystal shutter 62 as shown in FIG. 3 so that an image obtained by blocking a part of the subject light image is incident on the eyepiece window 17 (step S1).

  Next, the image signal processing circuit 33 acquires the captured image signal output from the solid-state imaging device 21a, performs synchronization processing on the captured image signal to generate captured image data, and captures the image after the synchronization processing. White balance adjustment is performed by multiplying each color signal of the data by a gain corresponding to a preset light source type (step S2).

  Next, the control unit 32 displays an image 61b indicating the set light source type and the color temperature of the image after WB adjustment in the white balance adjustment performed in step S2 in the display area of the display device 61 (step S3).

  Further, the control unit 32 corresponds to an image corresponding to the portion of the subject optical image shielded by the non-transmissive area 62b of the liquid crystal shutter 62 in the image based on the captured image data after the WB adjustment, corresponding to the non-transmissive area 62b. It displays on the display area of the display device 61 to be performed (step S4).

  After step S4, if there is no instruction to change the color temperature by the operation of the operation unit 50 and there is no imaging instruction (step S7: NO), the process returns to step S2, and every time imaging is performed by the solid-state imaging device 21a. In addition, the image displayed on the display device 61 is updated.

  After step S4, if there is a color temperature change instruction or a light source type change instruction by operating the operation unit 50 (step S5: YES), the image signal processing circuit 33 sets the white balance gain in accordance with the specified condition. The WB adjustment is performed after the change (step S6), and the process returns to step S3.

  After step S4, if there is no color temperature change instruction or light source type change instruction by the operation of the operation unit 50, and there is an imaging instruction (step S7: YES), the control unit 32 records with the solid-state imaging device 21a. Let's take an image for.

  Then, WB adjustment is performed on the captured image signal obtained by this imaging by the white balance gain set at the time of imaging instruction by the image signal processing circuit 33, and the captured image data after the WB adjustment is stored in the recording medium 42. It is recorded (step S8). After step S8, the process returns to step S2.

  As described above, according to the digital camera shown in FIG. 1, the white balance obtained by capturing the observation image viewed from the eyepiece window 17 with a part of the subject light image and a part other than the part of the subject light image. It can be a stitched image with the adjusted image (image displayed on the display device 61). Then, by operating the operation unit 50, the white balance of the image displayed on the display device 61 can be changed.

  Therefore, the user of the digital camera is displayed on the display device 61 so that the discomfort of the seam between the subject light image and the image displayed on the display device 61 is minimized while confirming the observation image seen from the eyepiece window 17. By adjusting the white balance of the image to be captured, the color of the image captured and recorded on the recording medium 42 can be made close to the color of the subject actually viewed with the eyes.

  The configuration of the liquid crystal shutter 62 in the WB adjustment mode is not limited to that shown in FIG.

  For example, as shown in FIG. 8A in FIG. 8, the area overlapping the subject optical image is divided into nine in a lattice pattern, half of the nine divided areas is set as a transmission area 62a, and the other half is set as a non-transmission area 62b. May be.

  Further, as shown in FIG. 8B in FIG. 8, the area overlapping with the subject optical image is divided into four in a lattice shape, and half of the four divided areas is set as a transmission area 62a and the other half is set as a non-transmission area 62b. May be. Further, in FIG. 8A and FIG. 8B, the transmissive region 62a and the non-transmissive region 62b may be reversed.

  Further, as shown in FIG. 9A in FIG. 9, the area overlapping the subject optical image is divided into three strips, the areas at both ends of the three divided areas are set as the transmission area 62a, and the middle area is the non-transmission area 62b. The configuration may be as follows.

  Further, as shown in FIG. 9B in FIG. 9, in FIG. 9A, the transmissive region 62 a and the non-transmissive region 62 b may be reversed.

  Further, as shown in FIG. 10A in FIG. 10, a configuration may be adopted in which four non-transmissive regions 62b are spaced apart from each other in a region overlapping with the subject light image, and the remaining regions are transmissive regions 62a. In FIG. 10A, the number of non-transmissive regions 62b may be two, three, or five or more.

  Further, as shown in FIG. 10B of FIG. 10, in FIG. 10A, the transmissive region 62 a and the non-transmissive region 62 b may be reversed.

  3, 8, 9, and 10, any one of the transmissive region 62 a and the non-transmissive region 62 b is independently arranged in the region overlapping the subject light image. It has a configuration.

  Here, the region arranged independently is a region that is not in contact with any other region (the transmission region 62a shown in FIGS. 9A and 10B or the non-transmission region 62a shown in FIG. 9B and 10A corresponds). A region that is in contact with another region but whose contact portion is close to a point.

  For example, in FIG. 8A of FIG. 8, the transmissive region 62 a on the upper right is in contact with the transmissive region 62 a on the lower left at only one point. For this reason, it can be said that the transmission region 62a is an independent region.

  The configuration of the liquid crystal filter 62 exemplified in FIG. 8A is a configuration in which five independent transmission regions 62a are arranged in a region overlapping with the subject light image, and a non-transmission region 62b is arranged in a region other than the transmission region 62a. It can be said that four independent non-transmissive regions 62b are arranged in a region overlapping with an image, and a transmissive region 62a is arranged in a region other than the non-transmissive region 62b.

  In the liquid crystal shutter 62, the area that overlaps the subject light image is simply divided into two, the transmissive area is disposed on one side, the non-transmissive area is disposed on the other, and the captured image is superimposed on the non-transmissive area. Since the subject light image constituting the observation image can be compared with only one captured image, it is difficult to properly adjust the white balance.

  As in the digital camera shown in FIG. 1, the liquid crystal shutter 62 has a configuration in which a plurality of transmission regions and non-transmission regions are arranged independently in a region overlapping the subject light image. It is possible to compare a subject light image constituting an image with a plurality of captured images. Alternatively, it is possible to compare the captured image constituting the observation image with a plurality of subject light images. Alternatively, it is possible to compare a plurality of subject light images constituting an observation image with a plurality of captured images.

  Accordingly, it is possible to appropriately adjust the white balance while viewing the observation image that can be seen from the eyepiece window 17. As shown in FIGS. 3 and 8, in the configuration in which the same number of transmission regions and non-transmission regions are arranged in a checkered pattern, the captured image and the subject light image are uniformly arranged in the observation image. Adjustment is particularly easy.

  In FIG. 8A in FIG. 8, in the configuration in which the non-transmissive region 62 b and the transmissive region 62 a are reversed, the area of the captured image in the observation image is larger than the area of the subject light image in the observation image. By making the occupied area of the captured image after the WB adjustment processing in the observation image larger than that of the subject light image, the white balance can be adjusted more easily.

  In the example of FIG. 2, a part of the subject light image incident on the eyepiece window 17 is shielded by the liquid crystal shutter 62, but the present invention is not limited to this. For example, instead of the liquid crystal shutter 62, a plate-like member obtained by applying a light shielding material to a transparent glass plate is used, and this member is used between the subject-side finder window 16 and the eyepiece window 17 or the subject-side finder window 16. It is set as the structure which can be taken in / out on the outer optical axis L. FIG.

  In the WB adjustment mode, the control unit 32 drives a motor that moves the member and inserts the member on the optical axis L. When the WB adjustment mode is not set, the control unit 32 moves the member to the optical axis. Evacuate from above L.

  This makes it possible to brighten the subject light image in the observation image viewed from the eyepiece window 17 as compared with the case where the liquid crystal shutter 62 is used. Further, in the state where the WB adjustment mode is not set, since the above member does not exist on the optical axis of the finder device 15, the observation image seen from the eyepiece window 17 can be brightened.

  Even in the configuration in which the liquid crystal shutter 62 is omitted in FIG. 2, an image equivalent to the observation image shown in FIG. 6 can be seen from the eyepiece window 17. Hereinafter, a method for making an observation image equivalent to the case of using the liquid crystal shutter 62 having the configuration shown in FIG. 8B in FIG. 8 without using the liquid crystal shutter 62 visible from the eyepiece window 17 will be described.

  As shown in the upper left of FIG. 11, if the amount of the red component of the subject light image incident on the subject side finder window 16 is a, for example, the red light incident on the subject side finder window 16 is half-light in the prism 66. It is attenuated by the mirror 63 and becomes a / 2 as shown in the lower left of FIG.

  Assuming that the amount of red component emitted from the display device 61 in a state where an image based on the captured image data after the WB adjustment processing is displayed on the display device 61 is b, the control unit 32 divides the display area of the display device 61 into four. The image displayed on the display device 61 is adjusted so that the red component light of (b−a) is emitted from the upper right area and the upper left area. Further, the control unit 32 displays black in the upper left and lower right areas of the display area of the display device 61.

  As a result, as shown in the upper right of FIG. 11, the light amount of the red component emitted from the display device 61 is (ba) in the upper right and lower left areas, and the remaining areas are almost zero.

  As shown in the lower center of FIG. 11, the light emitted from the display device 61 is attenuated by the half mirror 63 in the prism 66 to become (b−a) / 2.

  For this reason, as shown in the lower right of FIG. 11, the amount of light in the upper right and lower left areas in the observation image is (a / 2) + (ba−2) / 2 = b / 2. The amount of light is a / 2.

  Up to this point, only red light has been described, but the same applies to blue and green. As a result, an observation image equivalent to the case of using the liquid crystal shutter 62 (joint image of the subject light image and the image corresponding to the captured image after WB adjustment) can be observed from the eyepiece window 17.

  The digital data corresponding to b is red data of each pixel in the captured image data after WB adjustment processing, and the digital data corresponding to the a is captured image data after synchronization processing (before WB adjustment processing) ) Is red data of each pixel.

  For this reason, the image signal processing circuit 33 performs processing for subtracting the captured image data after the synchronization processing from the captured image data after the WB adjustment processing. Then, the control unit 32 causes the display device 61 to display an image based on the captured image data after the subtraction process. Thereby, an observation image equivalent to the case where the liquid crystal shutter 62 is used can be seen from the eyepiece window 17.

  Depending on the setting of the white balance gain, color data having a minus sign may be generated as a result of the subtraction process. However, the display device 61 cannot display data with a minus sign.

  Therefore, if there is color data whose sign is negative as a result of the subtraction process, the control unit 32 uses an attenuation filter (attenuation member) for attenuating the subject light image incident on the eyepiece window 17 with a predetermined attenuation rate. Is inserted closer to the subject side than the position on the optical axis of the finder device 15 where the subject light image incident on the subject-side finder window 16 and the image displayed on the display device 61 overlap.

  Note that the control unit 32 does not insert an attenuation filter when there is no color data whose sign is negative as a result of the subtraction process. As the attenuation member, a liquid crystal capable of electrically controlling light transmittance may be used. In this case, the attenuation member may always be disposed on the optical axis. If there is no color data with a minus sign, the liquid crystal transmittance may be controlled so as not to attenuate light.

  The position where the subject optical image incident on the subject-side finder window 16 and the image displayed on the display device 61 overlap is the position where the half mirror 63 and the optical axis L intersect in the configuration of the finder device 15 of FIG. It is. Further, in the finder device 15 of FIG. 2, when the prism 66 is deleted and a see-through display device 61 is disposed at the position of the prism 66, the position where the display surface of the display device 61 intersects with the optical axis L. It is.

  In the example of FIG. 2, the control unit 32 is on the optical axis L between the prism 66 and the objective lens 65, between the objective lens 65 and the subject side finder window 16, or outside the subject side finder window 16. Insert an attenuation filter.

  For example, when an attenuation filter with an attenuation rate of 50% is inserted, the light amount of the subject light image after passing through the prism 66 is a / 4 as shown in the lower left part of FIG. In this case, as shown in the upper right of FIG. 12, the display device 61 displays an image emitting {b− (a / 2)} light in the upper right and lower left areas, and (a An image emitting light of / 2) may be displayed.

  The image emitting light (a / 2) corresponds to an image obtained by attenuating a subject light image incident from the subject-side finder window 16 with an attenuation filter. The original data of this image is obtained by uniformly reducing each pixel data of the captured image data after the synchronization processing to 1/2 (this value is a value corresponding to the attenuation rate of the attenuation filter).

  Therefore, the control unit 32 is obtained by performing a process of subtracting the captured image data obtained by uniformly halving each pixel data of the captured image data after the synchronization process from the captured image data after the WB adjustment process. Images based on the captured image data are displayed in the upper right and lower left areas of the display device 61. In addition, the control unit 32 displays images based on the captured image data obtained by uniformly halving each pixel data of the captured image data after the synchronization processing in the upper left and lower right areas of the display device 61. Display.

  The light emitted from the display device 61 is attenuated to ½ by the half mirror 63 in the prism 66 and becomes as shown in the lower center of FIG.

  For this reason, as shown in the lower right of FIG. 12, in the observation image, the light amount in the upper right and lower left areas is (b / 2), and the light amount in the remaining areas is a / 2. An observation image equivalent to that used (an image obtained by joining the image corresponding to the subject light image and the image corresponding to the captured image after WB adjustment) can be presented to the user.

  When liquid crystal is used as the attenuation member, in this liquid crystal, the area corresponding to the upper left and lower right areas in the subject light image has a transmittance of 0, and the areas corresponding to the other areas have a transmittance of 50. %. As a result, as shown in the lower left part of FIG. 13, the light amount of the subject light image after passing through the prism 66 is a / 4 in the upper right and lower left areas, and the light amount in the upper left and lower right areas is a / 2.

  And the control part 32 obtained by performing the process which subtracts the picked-up image data which made each pixel data of the picked-up image data after a synchronous process uniform 1/2 from the picked-up image data after a WB adjustment process. Images based on the captured image data are displayed in the upper right and lower left areas of the display device 61. In addition, the control unit 32 displays a black image in the upper left and lower right areas of the display device 61 (upper right in FIG. 13).

  As a result, the light emitted from the display device 61 is attenuated to ½ by the half mirror 63 in the prism 66 and becomes as shown in the lower center of FIG.

  Therefore, as shown in the lower right part of FIG. 13, the same observation image as the lower right part of FIG. 12 can be presented to the user.

  Instead of this liquid crystal, a region corresponding to the upper left and lower right areas in the subject light image is shielded, and a region corresponding to the other area is used with a lattice-like member that transmits light with a transmittance of 50%. Also good. Also in this case, the observation image shown in the lower right of FIG. 13 can be presented to the user by the same processing as when using the liquid crystal. When such a member is used, this member may be retracted from the optical axis in the absence of color data having a minus sign.

  As described above, the following items are disclosed in this specification.

  The disclosed imaging device includes an imaging element that images a subject through an imaging optical system, a finder window into which subject light is incident, a display unit that displays an image, and an eyepiece window, and the subject that has entered from the finder window A finder device configured to be able to observe an image in which a light image and an image displayed on the display unit are superimposed from the eyepiece window, and an observation image which is an image observed from the eyepiece window. An image in one of the first area and the second area is divided into the first area and the second area excluding the plurality of first areas. The first area is the image based on the data corresponding to the one area in the captured image data after white balance adjustment processing obtained by imaging the subject by the above or an image corresponding to the image. The image in the other area of said second area, in which and a control unit that performs control of the image corresponding to the object light image or the subject light image.

  In the disclosed imaging apparatus, the control unit performs a light-blocking control unit that performs a light-blocking control that prevents a portion of the subject light image that overlaps the one area from entering the eyepiece window, and the light-blocking control is performed. In this state, the area corresponding to the one area in the display area of the display unit corresponds to the one area in the captured image data after white balance adjustment processing obtained by imaging the subject with the image sensor. And a display control unit for displaying an image based on the data to be displayed.

  In the disclosed imaging apparatus, the control unit corresponds to a portion that overlaps the one area of the subject light image from data corresponding to the one area in the captured image data after the white balance adjustment processing. A subtraction processing unit for subtracting data, and an image based on the data after subtraction by the subtraction processing unit is displayed in a region corresponding to the one area in the display region of the display unit, and the display region in the display unit The area corresponding to the other area includes a display control unit that hides the image.

  The disclosed imaging apparatus attenuates the subject light image on the optical axis on the subject side with respect to the position on the optical axis of the finder device where the image displayed on the display unit and the subject optical image overlap. And an image data generating unit that generates image data corresponding to the object light image attenuated by the attenuation member from a captured image signal obtained by imaging the object by the image sensor. And a subtraction processing unit for subtracting data corresponding to the one area of the image data generated by the image data generation unit from data corresponding to the one area in the captured image data after the white balance adjustment processing And an image based on the data after subtraction by the subtraction processing unit is displayed in an area corresponding to the one area in the display area of the display unit. A display control unit that displays an image based on data corresponding to the other area of the image data generated by the image data generation unit in an area corresponding to the other area in the display area of the display unit; Is included.

  In the disclosed imaging device, the one of the subject light images on the optical axis closer to the subject than the position on the optical axis of the finder device where the image displayed on the display unit and the subject optical image overlap. An attenuation member for attenuating a portion corresponding to the area, and the control unit corresponds to the subject optical image attenuated by the attenuation member from a captured image signal obtained by imaging the subject with the imaging element. An image data generation unit that generates image data to be performed, and the one area of the image data generated by the image data generation unit from data corresponding to the one area in the captured image data after the white balance adjustment process; A subtraction processing unit that subtracts the corresponding data, and an image based on the data after subtraction by the subtraction processing unit, the image in the display area of the display unit To display a square area of the corresponding region, a solid black image, it is intended to include, a display control unit for displaying a region corresponding to the other area in the display area of the display unit.

  In the disclosed imaging device, the area of the one area is set larger than the area of the other area.

  In the disclosed imaging apparatus, each of the divided areas arranged in a checkered pattern is set as the first area among the divided areas obtained by dividing the observation image in a lattice shape.

  The present invention is particularly convenient and effective when applied to a highly functional digital camera or the like.

DESCRIPTION OF SYMBOLS 15 Finder apparatus 16 Subject side finder window 17 Eyepiece window 32 Control part 61 Display apparatus 62 Liquid crystal shutter 62a Transmission area 62b Non-transmission area

Claims (6)

An image sensor for imaging a subject through an imaging optical system;
An image including a finder window into which subject light is incident, a display unit for displaying an image, and an eyepiece window, and an image in which a subject light image incident from the finder window is superimposed on an image displayed on the display unit A viewfinder device configured to allow observation from an eyepiece window;
In the state where the observation image which is an image observed from the eyepiece window is divided into a plurality of independent first areas and a second area excluding the plurality of first areas, the first area and An image based on data corresponding to the one area in the captured image data after white balance adjustment processing obtained by capturing an image of a subject with the image sensor, or an image in one area of the second area A control unit configured to control an image corresponding to an image and an image in the other of the first area and the second area as the subject light image or the image corresponding to the subject light image; equipped with a,
Wherein the observation image of the divided areas in a state of being divided in a grid pattern, set Ru imaging device each divided areas are arranged in a checkered pattern as a said first area. The imaging apparatus according to claim 1,
The controller is
A light-shielding control unit that performs light-shielding control to prevent a portion of the subject light image that overlaps the one area from entering the eyepiece window;
In the state where the shading control is performed, the imaged image data after white balance adjustment processing obtained by imaging the subject with the imaging element in the area corresponding to the one area in the display area of the display unit A display control unit that displays an image based on data corresponding to one area. The imaging apparatus according to claim 1,
The controller is
A subtraction processing unit that subtracts data corresponding to a portion overlapping the one area of the subject light image from data corresponding to the one area in the captured image data after the white balance adjustment processing;
An image based on the data after subtraction by the subtraction processing unit is displayed in an area corresponding to the one area in the display area of the display unit, and an area corresponding to the other area in the display area of the display unit is an image. An image pickup apparatus including: a display control unit configured to hide the display. The imaging apparatus according to claim 1,
An attenuation member for attenuating the subject optical image on the optical axis on the subject side relative to a position on the optical axis of the viewfinder device where the image displayed on the display unit and the subject optical image overlap;
The controller is
An image data generation unit that generates image data corresponding to the subject optical image attenuated by the attenuation member from a captured image signal obtained by imaging the subject with the imaging element;
A subtraction processing unit that subtracts data corresponding to the one area of the image data generated by the image data generation unit from data corresponding to the one area in the captured image data after the white balance adjustment processing;
An image based on the data after subtraction by the subtraction processing unit is displayed in an area corresponding to the one area in the display area of the display unit, and the other area of the image data generated by the image data generation unit An image pickup apparatus comprising: a display control unit configured to display an image based on corresponding data in an area corresponding to the other area in the display area of the display unit. The imaging apparatus according to claim 1,
A portion corresponding to the one area of the subject optical image on the optical axis on the subject side with respect to the position on the optical axis of the finder device where the image displayed on the display unit and the subject optical image overlap. A damping member for damping,
The controller is
An image data generation unit that generates image data corresponding to the subject optical image attenuated by the attenuation member from a captured image signal obtained by imaging the subject with the imaging element;
A subtraction processing unit that subtracts data corresponding to the one area of the image data generated by the image data generation unit from data corresponding to the one area in the captured image data after the white balance adjustment processing;
An image based on the data after subtraction by the subtraction processing unit is displayed in a region corresponding to the one area in the display region of the display unit, and a black color image is displayed in the other area in the display region of the display unit. And a display control unit that displays in a corresponding area. The imaging apparatus according to any one of claims 1 to 5,
An imaging apparatus in which an area of the one area is set larger than an area of the other area.

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