JP5253130B2 - Image display device, imaging device, and image display method - Google Patents

Description

The present invention relates to an image display device , an imaging device including the image display device, and an image display method .

  When an image display device provided on the back of a camera (imaging device) reproduces and displays a captured image, the brightness of the display unit (liquid crystal display element) is changed so that the image display device can be easily seen. .

  The brightness of the display unit may be obtained by obtaining an average value of the brightness of captured image data, and depending on the brightness detected by an illuminance sensor provided near the image display device.

  In the former, since it is information from the image data, it is based on the photographing result, and is influenced by the brightness of the subject and the background. The correlation with the surrounding brightness is low, and the image display device has an appropriate brightness. It does not always become.

  The latter is an output from the illuminance sensor output, which can be said to be ambient brightness information, but since it is provided on the back surface, the detection result is mainly in the rear. For this reason, for example, when a bright place (thing) is taken from a dark place (when taking a picture of the outside from the room, etc.), if a reproduced image is viewed immediately after taking a picture, it will be felt “dark”.

  This may be due to the fact that the eyes are accustomed to the outdoor brightness seen through the viewfinder, but the illuminance sensor output itself is the result of measuring something darker than the actual ambient brightness. .

  As described above, the color of the liquid crystal display element varies depending on ambient light (environment light). Also, humans absorb the influence of ambient light (environmental light) through adaptation. Therefore, although it is the same photographed image, the hue (chromaticity) to be felt changes due to the difference in ambient light (environmental light) during reproduction display.

  In order to deal with and improve such problems, for example, in Patent Document 1, a display device with a light amount evaluation function capable of improving the visibility of a displayed image in consideration of the amount of ambient light in the usage environment, and A light supply control method is provided.

  According to this technique, ambient brightness (photometric value) as the environmental information of the display means and the positional relationship between the display means and the light source are detected, respectively, and the obtained information and / or photometric value and predetermined adjustment determination are performed. The lighting is turned on when the display means is darker than the surroundings by comparing the values.

  As a result, information is displayed on the display means with the same brightness as that of the surroundings, so that it is possible to always display appropriately and easily.

Further, for example, in Patent Document 2, dynamic optimum control corresponding to a change in ambient light is realized by using a photometric function of an image input device to set a luminance in an image confirmation or control information confirmation display.
JP-A-2001-109434 JP 2004-109170 A

  In the technique described in Patent Document 1, in the light amount detection unit, for example, a sensor that measures the amount of light incident on the liquid crystal display unit from the surrounding environment is provided on the same side as the liquid crystal display surface. In addition, although not shown in the figure, the light quantity detector is provided with an optical system on the front side of the sensor in order to effectively collect and detect incident light.

  However, by providing a plurality of sensors, the amount of light to be detected is increased so that errors will not occur in the evaluation performed later. Even if the measurement (photometry) range can be expanded, It is difficult to improve measurement accuracy.

  In the case of the technique described in Patent Document 2, directivity is affected only by the photometric function of the image input device. Here, since it is a camera, the photometry function is centered in the direction of the subject, and it is difficult to say brightness information appropriate for controlling the brightness of the display unit.

  If the camera is a TTL photometric method, it is necessary to detect whether or not the lens cap is mounted and to set brightness not depending on the photometric function result when the lens cap is mounted.

An object of the present invention is to provide an image display device , an imaging device, and an image display method capable of increasing the detection accuracy of the brightness of ambient light (environmental light) during reproduction display and displaying a subject without a sense of incongruity. .

In order to achieve the above object, an image display device according to claim 1 is an image display means for displaying a photographed image, a first detection means for detecting the brightness around the image display means, Second detection means for detecting the brightness of light incident through the lens, calculation means for calculating an evaluation value based on the output of the first detection means and the output of the second detection means, based on the evaluation value calculated by the calculation means, and a brightness control means for controlling the brightness of Viewing image that displays on the image display means, said calculation means, said first detection means The evaluation value is calculated by weighting the first brightness information obtained from the output and the second brightness information obtained from the output of the second detection means, and the first brightness information and the Based on the comparison result with the second brightness information, the weight And changes the first brightness information and the weighting ratio of the second brightness data in only operation.

The image display device according to claim 7 is an image display unit that displays an image, a first detection unit that detects the brightness around the image display unit, and a photographic lens via a photographic lens at the time of shooting. Second brightness detecting means for detecting the brightness of the display image, and brightness control means for evaluating the brightness of the surroundings and controlling the brightness of the display image when displaying an image on the image display means. The control means is configured such that the weight of the brightness information obtained from the output of the first detection means is larger than the weight of the brightness information obtained from the output of the second detection means, and from the output of the second detection means. The weighting of the obtained brightness information is varied according to the magnitude relationship with the brightness information obtained from the output of the first detection means, the brightness is evaluated, and the brightness of the display image is controlled. It is characterized by.

  According to the image display device of the present invention, it is possible to increase the accuracy of detecting the brightness of ambient light (environmental light) at the time of reproduction display and display a subject without a sense of incongruity.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an external perspective view of a digital camera as an imaging apparatus according to an embodiment of the present invention as seen from the back, and FIG. 2 is a top view of the digital camera of FIG.

  1 and 2, a finder eyepiece unit 1 is a member for observing a subject, and a liquid crystal monitor (image display unit 2 in FIG. 2) is configured to perform predetermined image processing on an image captured by an image sensor such as a built-in CCD. Display through the section.

  The rear operation dial 3 and the upper operation dial 4 are operation members for executing predetermined operations when changing shooting conditions such as an exposure value at the time of shooting.

  The release button 5 is for starting a photographing operation after the photographing condition is determined. The grip portion 6 is for the right side portion of the digital camera to protrude forward, and for the photographer to hold the digital camera in preparation for shooting. The finger pad portion 7 projects to the back side and plays a role of preventing the thumb from slipping when the digital camera is gripped by gripping the grip portion 6.

  The operation switch 8 is provided on the upper side of the finger pad 7 for performing a predetermined operation. The media cover 9 is rotatably held by the digital camera, and can be opened and closed according to a user operation when a recording medium such as a CF card is inserted and removed.

  The illuminance sensor light receiving unit 10 which is one of the features of the present invention is assembled with an illuminance sensor which will be described later, and is irradiated with light transmitted through the illuminance sensor light receiving unit 10.

  FIG. 3 is a block diagram of the digital camera of FIG.

  As shown in the figure, this digital camera processes an image signal from the microcomputer (brightness control means, image control means) 101 that performs overall control, an imaging unit 102 that includes a CCD or CMOS area sensor, and the like. The image processing unit 103 and the image display unit 104 are provided.

  The digital camera also includes an illuminance sensor (first detection means) 105, an external storage device 106, a photometric sensor (second detection means) 107, a photographing lens 108, and a focus detection unit 109. The illuminance sensor 105 continuously detects the brightness at a predetermined interval during image display.

  The photographing lens 108 functions as a third detection unit that detects the brightness of the captured image from the luminance distribution of the captured image.

  The brightness control means evaluates the brightness of the surroundings and controls the brightness of the display image when displaying the image on the image display means. Further, the brightness control means selects the outputs of the first detection means and the second detection means when displaying the reproduced image. The luminance control means selects the outputs of the first detection means and the third detection means when displaying the output image from the imaging means in real time. In either case, the brightness control unit is controlled based on the outputs of the two selected detection units, and the brightness of the entire display image is varied.

  The microcomputer 101 is, for example, a one-chip computer in which a CPU (central processing unit), RAM, ROM, nonvolatile memory, input / output port, and the like are arranged.

  The microcomputer 101 performs a series of operations based on a sequence program stored in the ROM. A nonvolatile memory built in the microcomputer 101 stores a series of parameters related to control and adjustment of image processing.

  The series of parameters refers to a series of camera control parameters including adjustment values relating to exposure control and focus adjustment, adjustment values of the image sensor (imaging unit 102), and white balance of the photographed image. Is a control value or the like when displaying.

  The imaging unit 102 includes an imaging element such as a CCD or CMOS area sensor and a sensor driving unit that drives the imaging element, and forms an image of a light flux from the imaging region on the imaging element through the optical system of the imaging lens 108. The image sensor photoelectrically converts this and outputs it to the image processing unit 103 as an electrical signal.

  In the image processing unit 103, the captured image correcting unit has an A / D conversion function, and after A / D converting the signal from the imaging unit 102, a series of dark current correction, shading correction, and the like caused by the imaging unit 102 Make corrections.

  The image processing unit 103 removes noise components using a low-pass filter, and performs a series of image processing such as pixel and color interpolation processing, white balance and gamma correction. An internal IF (interface) unit (not shown) sends captured image data subjected to a series of image processing to the external storage device 106 and captures the captured image data recorded in the external storage device 106.

  A series of processes for displaying captured image data from the image capturing unit 102 subjected to image processing and captured image data recorded in the external storage device 106 are performed in the image display unit 104 by the image processing unit 103. It will be output later.

  A series of processing up to output to the image display unit 104 includes white balance adjustment, resizing, and VRAM storage.

  The white balance adjustment unit adjusts the white balance of the display image based on the region extraction and the output from the average luminance detection unit.

  The display image adjusted for white balance is converted into a resolution that can be displayed on the LCD display unit in the resizing unit, and the output is stored in the VRAM unit.

  The display image data stored in the VRAM unit is converted to a resolution that allows region display, and then output to the image display unit 104.

  The image display unit 104 includes an LCD control unit 111, an LCD display unit 112, and a backlight 113.

  The LCD control unit 111 includes a γ correction unit 121, a DA conversion unit 122, an LCD driver unit 123, and a WB unit 124.

  In the γ correction unit 121, the output from the VRAM of the image processing unit 103 is subjected to gamma correction suitable for the LCD display unit 112, and then converted into a signal to be output to the LCD display unit 112 by the DA conversion unit 122.

  The LCD driver unit 123 outputs a drive signal for the LCD display unit 112 in synchronization with the image data DA-converted by the DA conversion unit 122.

  The LCD display unit 112 includes an LCD display panel, and the LCD display panel is illuminated by the backlight 113.

  The data displayed on the LCD display unit 112 is image data stored in the external storage device 106 and camera setting information in addition to the image data from the imaging unit 102.

  The backlight 113 is composed of a plurality of LEDs and an optical member. The LED drive control is performed by on-off control using a constant current and a PWM control signal from the microcomputer 101, and the luminance at the time of lighting is changed by changing the duty ratio. The duty control resolution is 8 bits, and is always turned on with a constant current when fully on. At this time, the backlight 113 has the maximum luminance.

  The external storage device 106 is a non-volatile storage device that can store a plurality of image data, such as a CF card and an SD card, and is detachable from the system (digital camera).

  That is, with the external storage device 106 attached to the system, the operation of storing the image data output from the image processing unit 103 is performed for one or a plurality of shooting screens, and then removed from the system. Attach to another system that can read in data format. Thereby, the stored data can be reproduced, edited, and saved.

  If the image data can be read out in the data format of this system by attaching the external storage device 106 again, the image processing unit 103 performs optimum processing after reading out. Then, after the LCD control unit 111 performs processing for displaying on the LCD display unit 112, the image data can be displayed on the LCD display unit 112.

  The focus detection unit 109 is configured by a line sensor such as a CCD including a field lens, a reflection mirror, a secondary imaging lens, a diaphragm, and a plurality of photoelectric conversion elements disposed in the vicinity of the imaging surface.

  The focus detection unit 109 according to the present embodiment is a well-known phase difference method, and uses a plurality of areas in the observation screen (in the viewfinder field) as distance measurement points so that the focus detection points can be detected. It is configured.

  The lens 108 incorporates a focus adjustment circuit and a diaphragm drive circuit, and signals are transmitted to and from the microcomputer 101 via a mount contact (not shown).

  The microcomputer 101 operates a focus adjustment circuit built in the lens 108 based on the output from the focus detection unit 109 and outputs a signal for optimal focus adjustment. At the same time, the microcomputer 101 operates a diaphragm driving circuit built in the lens 108 based on an output from a photometric circuit (not shown), and outputs a signal that provides an optimum exposure amount.

  The photometric sensor 107 is also called an AE sensor and is connected to the AD conversion unit of the microcomputer 101. A subject at the time of photographing and the amount of light from the surroundings are irradiated through the lens 108 mounted on the digital camera.

  The magnitude and extent of brightness can be determined from the result of AD conversion. The microcomputer 101 establishes the relationship between ISO sensitivity, shutter speed TV, and aperture AV based on the output of the photometric sensor 107. When this relationship is established, it is possible to shoot with optimum brightness.

The photometric sensor output is output as an EV (Exposure Value (= Light Value) value), and the following relationship holds.
EV = log2 (F ^ 2 / T)
EV: Exposure Value (= Light Value)
F: Lens aperture (AV)
T: Exposure time (seconds) (TV)
This EV value is a value determined only by the aperture (F) and the exposure time (T), and ISO determined by correction for the sensitivity of the image sensor is added. Furthermore, the conversion from the EV value to the illuminance has a known relational expression, and is obtained by this.

  The illuminance sensor 105 is connected to the AD conversion unit of the microcomputer 101. An output proportional to the amount of incident light that is attached to the illuminance sensor light receiving unit 105 installed on the back surface of the digital camera shown in FIG.

  Brightness: The relationship between illuminance and illuminance sensor output is expressed by the following equation.

Brightness: Illuminance (incident light quantity) = illuminance sensor output / sensor sensitivity × transmittance of the illuminance sensor light receiving unit The illuminance sensor 105 can measure brightness from 10 lux (LX) to 20,000 lux. If the image display unit 104 is a transmissive LCD, this measurement range sufficiently covers a variable luminance range.

  The microcomputer 101 uses the AD conversion result to calculate the brightness from the above relational expression.

(First embodiment)
The setting of the brightness of the LCD display unit 112 will be described with reference to FIGS. 4, 5, 6, and 7.

  FIG. 4 is a flowchart showing the procedure of the first embodiment of the display control process of the image display unit executed by the digital camera of FIG.

  This process is performed by the microcomputer 101 controlling the illuminance sensor 105, the photometric sensor 107, and the WB unit 124 that is a block in the LCD control unit 111.

  The brightness of the image display unit 104 (the LCD display unit 112 thereof) is determined by the “γ” processing of the LCD control unit 111 and the backlight 113 controlled by the microcomputer 101.

  The microcomputer 101 determines whether or not the brightness is automatically controlled (step S100), and when automatically controlling, determines whether or not the photographing frame (display frame) image to be displayed is switched (step S200). .

  When switching, the microcomputer 101 captures a series of information of the photometric sensor 107 at the time of photographing that should have been performed immediately before (step S300). Furthermore, the microcomputer 101 captures information from the illuminance sensor 105 (step S400).

  Then, the microcomputer 101 obtains the brightness of the surroundings using the acquired two sensor information, and determines the luminance suitable for the brightness (step S500). Details will be described with reference to FIG.

  Since the brightness of the image display unit 104 at the time of display has been determined, the microcomputer 101 obtains the backlight driving condition: PWM duty ratio and γ of the image to be displayed from previously prepared table data so as to obtain the brightness. The microcomputer 101 reflects the brightness of the image display unit 104 (step S600).

  The microcomputer 101 repeats these processes until it is turned off (step S700). There are two functions: turning off automatically after a predetermined time has elapsed, and turning off the user.

  The automatic brightness control of the image display unit 104 can be turned on / off by a user's switch operation, and the processing from step S200 to step S500 is not performed when the brightness is turned off.

  When the photographed frame image to be displayed is not at the time of switching, the same image is already displayed, and therefore the photometric sensor information is the same as the previous time, so there is no need to newly capture.

  FIG. 5 is a flowchart showing the procedure of the brightness determination process executed in step S500 of FIG.

  Two weighting coefficients of the photometric sensor information are obtained, the ambient brightness is obtained using the coefficients, and the luminance of the image display unit 104 suitable for the weight is set.

  In the process of weighting 1 of the subject information (photometric sensor information), the microcomputer 101 obtains the weighting coefficient α of the photometric sensor information from the operation of the digital camera that displays the image (step S510). Details will be described with reference to FIG.

  A unit is shared for each of the illuminance sensor information and the photometric sensor information, and a difference in brightness information is obtained. When the unit is shared, the illuminance LX is obtained from the output of the illuminance sensor 105. Therefore, if the photometric sensor information is an EV value generally used in a camera, it is converted into the illuminance LX using a conversion formula that is normally used. To do.

  When the photometric sensor information is held as the AE value, the microcomputer 101 converts the ISO sensitivity, the TV value, and the AV value into the illuminance LX using a conversion formula that is normally used (step S520).

  In the process of weighting 2 of the subject information (photometric sensor information), the microcomputer 101 obtains the weighting coefficient β of the photometric sensor information using the result obtained in step S520 (step S530). Details will be described with reference to FIG.

  The microcomputer 101 calculates the ambient illuminance using the obtained weighting coefficients α, β, and Δ of the photometric sensor 107. Based on the illuminance sensor output on the back of the digital camera, fine adjustment is performed by weighting the difference between the photometric sensor information and the illuminance sensor information (step S540).

  Then, the microcomputer 101 obtains the luminance of the image display unit 104 suitable for the determined ambient illuminance (step S550). The relationship between the ambient illuminance and the luminance of the image display unit 104 suitable for it is obtained from table data prepared in advance.

  FIG. 6 is a flowchart showing the procedure of the first embodiment of the subject information weighting 1 process executed in step S510 of FIG.

  The microcomputer 101 determines the correlation between the brightness around the user and the photometric sensor information based on the time elapsed since the captured image to be reproduced and displayed, and obtains the weighting coefficient α.

  The microcomputer 101 determines whether or not the display mode is quick review (step S512). If the display mode is quick review, the weighting coefficient α of the photometric sensor information is set to 1 (step S514).

  In step S512, when it is not a quick review, that is, when the display is in accordance with the operation of the playback display button or the like, the microcomputer 101 uses the elapsed time from the previous shooting as a determination condition (step S513).

  When the elapsed time is smaller than the predetermined value, the microcomputer 101 sets the weighting coefficient α of the photometric sensor information to 0.5 (step S514). When the value is equal to or greater than the predetermined value, the microcomputer 101 sets the weighting coefficient α of the photometric sensor information to 0 (step S515).

  FIG. 7 is a flowchart showing the procedure of subject information weighting 2 executed in step S530 of FIG.

  The microcomputer 101 compares the brightness information around the subject obtained from the photometric sensor information with the brightness information around the user obtained from the illuminance sensor information to obtain the weighting coefficient β.

  The microcomputer 101 determines the magnitude relationship between the brightness obtained from the illuminance sensor information and the photometric sensor information (step S531). If the brightness by the illuminance sensor information is greater than the brightness by the photometric sensor information, the weighting coefficient β is set to 0. .5 (step S532), otherwise β is set to 1 (step S533).

  As described above, when determining the brightness of the reproduced display image using the brightness information obtained from the illuminance sensor 105 on the back of the digital camera and the brightness information of the subject obtained from the output of the photometric sensor 107, the brightness of the subject is determined. Information is weighted as follows.

  That is, the luminance information of the subject is weighted using two coefficients: a coefficient obtained from the elapsed time from the shooting of the image to be reproduced and displayed and a coefficient obtained from the magnitude relationship between the brightness information obtained from the illuminance sensor 105 on the back surface. .

(Second Embodiment)
The second embodiment of the present invention will be described below with reference to the drawings.

  In the first embodiment, the processing for reproducing and displaying a captured image has been described. The second embodiment shows an operation when displaying the output of the imaging unit 102 on the image display unit 104 in real time.

  Although the configuration is the same as that of the first embodiment, the processing operation is as follows. A series of processing will be described with reference to FIGS.

  FIG. 8 is a flowchart showing the procedure of the second embodiment of the display control process of the image display unit executed by the digital camera of FIG.

  FIG. 8 is obtained by adding the processes of step S150, step S250, step S1000, step S1010, and step S310 to the process of FIG. The same processing steps as those in FIG. 4 use the same numbers, and a description thereof is omitted here.

  The microcomputer 101 determines whether or not the brightness control of the image display unit 104 is automatic. If the control is automatic control, the microcomputer 101 determines whether or not the real-time display mode is set (step S150).

  In the real-time display mode, the microcomputer 101 determines whether or not it is immediately after switching the display mode (step S250). If it is immediately after that, the immediately preceding photometric sensor information is fetched (step S300), and the information obtained therefrom is used as the subject. It is set as luminance information (step S310).

  If not immediately after the switching, the microcomputer 101 captures the imaging information (step S1000), and uses the calculated brightness as subject luminance information (step S1010).

  The subject luminance information is obtained from the photographing information by the sensitivity and accumulation time of the image sensor and the transmittance of the optical system through which the amount of light irradiated to the image sensor passes.

  FIG. 9 is a flowchart showing the procedure of the second embodiment of the process of subject information weighting 1 executed in step S510 of FIG.

  FIG. 9 incorporates the correspondence in the real-time display mode (step S511) in FIG. That is, in the real-time display mode, the subject luminance information weighting coefficient is set to α = 1. Otherwise, since the captured image is reproduced and displayed, the processing is changed depending on whether or not the quick review is performed. In the figure, other processes in step S511 are the same as those in FIG. 6 and have already been described.

  As described above, when the real-time display mode has a function of displaying the captured image on the image display unit 104 in real time, the initial setting immediately after switching to the real-time display mode is performed in the first embodiment. The processing based on the brightness information is performed in the same manner as the form.

  Thereafter, the brightness of the image display unit 104 is continuously controlled by switching the subject luminance information from the brightness information obtained by the photometric sensor 107 to the brightness information obtained from the captured image.

  The present invention is not limited to the configurations of the first and second embodiments. For example, the display means is not limited to the LCD display unit, but can be applied as long as it has a display function. The display used may be used.

It is the external appearance perspective view seen from the back of the digital camera as an imaging device concerning an embodiment of the invention. It is a top view of the digital camera of FIG. It is a block diagram of the digital camera of FIG. It is a flowchart which shows the procedure of 1st Embodiment of the display control process of the image display part performed with the digital camera of FIG. It is a flowchart which shows the procedure of the brightness determination process performed by FIG.4 S500. It is a flowchart which shows the procedure of 1st Embodiment of the process of the weighting 1 of the subject information performed by step S510 of FIG. 6 is a flowchart showing a procedure of subject information weighting 2 executed in step S530 of FIG. 5; It is a flowchart which shows the procedure of 2nd Embodiment of the display control process of the image display part performed with the digital camera of FIG. It is a flowchart which shows the procedure of 2nd Embodiment of the process of weighting 1 of the subject information performed by step S510 of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Microcomputer 102 Image pick-up part 103 Image processing part 104 Image display part 105 Illuminance sensor 106 External storage device 107 Photometric sensor 108 Shooting lens 109 Focus detection part

Claims (11)

Image display means for displaying the captured image,
First detection means for detecting brightness around the image display means;
Second detection means for detecting the brightness of light incident through the taking lens;
Calculation means for calculating an evaluation value based on the output of the first detection means and the output of the second detection means;
Based on the evaluation value calculated by the calculation means, and a brightness control means for controlling the brightness of Viewing image that displays on the image display unit,
The calculation means weights the first brightness information obtained from the output of the first detection means and the second brightness information obtained from the output of the second detection means, and calculates the evaluation value. Calculate and change the weighting ratio of the first brightness information and the second brightness information in the weighting calculation based on the comparison result between the first brightness information and the second brightness information An image display device. The image display apparatus according to claim 1, wherein the calculating unit sets the weighting for the first brightness information in the weighting calculation to be larger than the weighting for the second brightness information. When the second brightness information is larger than the first brightness information, the calculating means may calculate the second brightness information more than when the second brightness information is not larger than the first brightness information. The image display apparatus according to claim 1, wherein the weighting for the brightness information is increased.   4. The image display according to claim 1, wherein the calculation unit calculates the evaluation value by subtracting the second brightness information from the first brightness information. 5. apparatus. Imaging means for taking an image;
  An imaging apparatus comprising: the image display apparatus according to claim 1. The calculating means reduces the weighting of the second brightness information as the elapsed time from when the image taken by the imaging means is taken until it is displayed on the display means is longer. The imaging device according to claim 5. Image display means for displaying an image;
First detection means for detecting brightness around the image display means;
A second detection means for detecting the brightness of the photographed image via the photographing lens at the time of photographing;
A luminance control means for evaluating the brightness of the surroundings and controlling the brightness of the display image when displaying an image on the image display means;
The luminance control means is configured such that the weight of the brightness information obtained from the output of the first detection means is greater than the weight of the brightness information obtained from the output of the second detection means, The weighting of the brightness information obtained from the output is varied according to the magnitude relationship with the brightness information obtained from the output of the first detection means, the brightness is evaluated, and the brightness of the display image is controlled. An image display device. The first detection means continuously performs detection at predetermined intervals during image display, and the brightness information detected by the second detection means is that obtained when the image was taken immediately before. 8. The image display apparatus according to claim 7, wherein Imaging device characterized by comprising an image display device according to claim 7 or 8. An image display method for displaying a captured image on an image display means,
  A first detection step of detecting the brightness around the image display means;
  A second detection step of detecting the brightness of light incident through the taking lens;
A calculation step for calculating an evaluation value based on the output of the first detection step and the output of the second detection step;
  A luminance control step for controlling the brightness of a display image displayed on the image display means based on the evaluation value calculated in the calculation step;
  In the calculation step, the evaluation value is calculated by weighting the first brightness information obtained from the output of the first detection step and the second brightness information obtained from the output of the second detection step. Calculate and change the weighting ratio of the first brightness information and the second brightness information in the weighting calculation based on the comparison result between the first brightness information and the second brightness information An image display method characterized by: An image display method for displaying a captured image on an image display means,
  A first detection step of detecting the brightness around the image display means;
  A second detection step of detecting the brightness of the photographed image via the photographing lens;
  A brightness control step for evaluating ambient brightness and controlling brightness of a display image when displaying an image on the image display means,
  In the luminance control step, the weight of the brightness information obtained from the output of the first detection step is larger than the weight of the brightness information obtained from the output of the second detection step. The weighting of the brightness information obtained from the output is varied according to the magnitude relationship with the brightness information obtained from the output of the first detection step, the brightness is evaluated, and the brightness of the display image is controlled. An image display method characterized by the above.

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