JP5311937B2 - Imaging apparatus and image display method - Google Patents

Description

  The present invention relates to an imaging apparatus and an image display method.

  In recent years, an imaging apparatus such as a digital camera can perform various displays on an image display apparatus such as a liquid crystal display. For example, a subject image before photographing can be displayed, and image data after photographing can be reproduced and displayed. Furthermore, various parameters of the imaging apparatus can be displayed, and image quality can be set by a graphical user interface.

  In some imaging apparatuses as described above, a user can display not only a composition but also a preview simulating exposure and development results after shooting on the image display apparatus before shooting. In addition, image processing can be applied to the image after shooting (hereinafter referred to as “re-development”), and a new image can be saved. Some have a function of previewing the results on an image display device.

  On the other hand, in recent years, an image display apparatus that measures the brightness of external light and automatically adjusts the brightness of the screen according to the measurement result to favor the display of images, characters, figures, etc. Proposed.

Patent Document 1 discloses a technique for adjusting the luminous intensity of a backlight on the back of a liquid crystal panel based on the result of detecting external light in a transmissive liquid crystal display. Patent Document 2 discloses a technique for adjusting the brightness of an illuminating unit that illuminates a display screen of a liquid crystal panel based on a result of external light detection in a reflective liquid crystal display. Patent Document 3 discloses a technique for adjusting the light emission amount of a phosphor material by adjusting a voltage level between electrodes based on a result of detecting external light in an organic EL display. Patent Document 4 discloses a technique that uses image quality adjustment parameters of an image based on the result of external light detection.
Japanese Patent Laid-Open No. 11-295992 JP 2000-10068 A JP 2002-297096 A JP 2001-309280 A

  However, when the brightness of the display screen is automatically adjusted based on the result of external light detection as in the above-described image display device, there may be a problem for the user. For example, this is a case where the user changes various imaging parameters and development parameters of the imaging apparatus while checking the preview before shooting and confirms the shooting result. Alternatively, the user changes the development parameter for redevelopment of the imaging apparatus while checking the preview when performing the redevelopment process, and confirms the result of the redevelopment process. In such a case, by automatically adjusting the brightness of the display screen based on the result of the external light detection by the image display device, parameters relating to the image displayed as intended by the user, that is, various types of the above-described imaging device Imaging parameters and development parameters cannot be changed.

  SUMMARY An advantage of some aspects of the invention is that it provides an imaging apparatus and an image display method for performing automatic brightness adjustment of a display screen by detecting external light in accordance with a display content change operation and various parameter changing operations.

In order to solve the above-described problems, an imaging apparatus according to the present invention includes a display unit that displays an image of a subject based on image data acquired by imaging the subject , a measurement unit that measures ambient brightness, and a display. It includes a parameter changing means for changing the parameters relating to the image being displayed on the device, and a display control means for controlling the brightness of the display unit based on the measurement result of the measuring means, display means, image by the parameter changing means The display control means displays the image reflecting the change of the parameter relating to the display means , and when the parameter relating to the image is changed by the parameter changing means, the display means is more effective than when the parameter relating to the image is not changed by the parameter changing means. The control is such that the brightness of the screen is difficult to change .

  ADVANTAGE OF THE INVENTION According to this invention, the brightness change of the display screen which the user does not intend by automatic brightness adjustment can be reduced.

  The best mode for carrying out the imaging apparatus and the image display method of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a configuration diagram of an imaging apparatus (digital camera) according to the first embodiment of the present invention. The digital camera 100 includes the following.

  The focusing lens 101, the zooming lens 102, and the stop 103 constitute an imaging optical system and are controlled by a CPU 109 described later. The focusing lens 101 performs focus adjustment by moving back and forth in the optical axis direction. The zooming lens 102 also performs zooming by moving forward and backward in the optical axis direction. The diaphragm 103 adjusts the amount of light to the image sensor.

  The imaging element 104 to the frame memory 108 constitute a photoelectric conversion system that converts an optical image of a subject formed by the imaging optical system into a digital image signal or image data. The image sensor 104 is a photoelectric conversion unit configured by a CCD image sensor or a CMOS image sensor. The image sensor 104 photoelectrically converts the subject image formed by the imaging optical system and outputs an image signal. Furthermore, the image sensor 104 has an electronic shutter function and can adjust the exposure time. However, the digital camera 100 may be configured to include a mechanical shutter instead of the electronic shutter function of the image sensor 104 and adjust the exposure time. The preprocessing circuit 105 includes a CDS (correlated double sampling) circuit, an AGC (auto gain control) circuit, and the like, and removes noise from the output image signal of the image sensor 104 and controls the gain.

  The A / D converter 106 converts the analog image signal output from the preprocessing circuit 105 into a digital image signal. The image signal processing unit 107 performs image signal processing such as shading correction on the digital image signal so as to correct the luminance unevenness due to the characteristics of the imaging optical system so as to obtain an image with uniform brightness. Further, the image signal processing unit 107 corrects the non-linearity of the image density due to the characteristics of the image sensor 104 and the image color bias due to the light source.

  The frame memory 108 is a buffer memory that temporarily stores the image signal generated by the image sensor 104 to the image signal processing unit 107. Hereinafter, the image data stored in the frame memory 108 is referred to as “RAW data” (first image data). In addition, a parameter related to the imaging condition when RAW data is acquired is referred to as an “imaging parameter”. Here, the imaging parameters include an aperture value that is a setting value of the aperture 103, a shutter speed that is a setting value of the electronic shutter and the mechanical shutter, and a gain value that is a setting value of the preprocessing circuit 105. Hereinafter, the aperture value is “Av”, the shutter speed is “Tv”, and the gain value is “ISO”.

  The CPU 109 is a unit that controls the entire digital camera 100. The CPU 109 sends a clock signal for controlling reading of the image signal of the image sensor 104 and controls the operation timing of the image sensor 104 to the frame memory 108. The power supply 110 supplies power to each circuit in the digital camera 100.

  The nonvolatile memory 111 records an initial camera setting value set in the camera when the power supply 110 is turned on. The nonvolatile memory 111 is an EEPROM or the like. Data recorded in the nonvolatile memory 111 is not erased even when the power supply 110 is turned off.

  The development processing unit 112 performs image processing on the RAW data read by the CPU 109 based on the setting of development parameters. In the present embodiment, the image data subjected to image processing by the development processing unit 112 is referred to as “second image data”. The “development parameter” indicates a parameter related to the image quality of digital image data. For example, parameters relating to white balance, color interpolation, color correction, γ conversion, edge enhancement, resolution, recording method, compression rate, and the like of digital image data are shown.

The recording format is JPEG (Joint Photographic
Experts Group) format and RAW format. In the JPEG format, irreversible compression processing by adaptive discrete cosine transform (ADCT) is performed on RAW data, and the file size capacity can be reduced. However, when the compression ratio is increased, the file size capacity of the JPEG format file can be reduced, but the image quality deteriorates. On the other hand, the RAW format can perform lossless compression (reversible compression) on the RAW data to reduce the file size capacity. However, since the RAW format is lossless compression, the file size capacity of the RAW format file can be reduced without losing image information, but the file size cannot be reduced as much as the JPEG format file.

  Further, the development processing unit 112 can change the RAW data to an image format for display by performing arbitrary adjustment processing (re-development). Therefore, in the RAW format, development parameters at the time of photographing can be added and used as parameters at the time of redevelopment. Hereinafter, processing for adjusting (changing) the image quality of digital image data using one or more development parameters is referred to as “development processing”.

  The RAM memory 113 temporarily stores data when the CPU 109 performs various processes in addition to the second image data subjected to image processing by the development processing unit 112.

  The display control unit (display control means) 114 is connected to a TFT 115 made of a liquid crystal display element, a VIDEO output terminal 132, a D terminal 133, and an HDMI terminal 134, which are variously provided in the digital camera 100.

  The display control unit 114 drives and controls the TFT 115. Further, insertion / removal detection of the VIDEO connector at the VIDEO output terminal 132, insertion / removal detection of the D terminal connector at the D terminal 133, and insertion / removal detection of the HDMI terminal connector at the HDMI terminal 134 are performed. In addition, the display control unit 114 outputs the image data stored in the RAM memory 113 in the display image format to various externally connected video display devices.

  The TFT (display unit) 115 has a backlight, and can be adjusted in 32 levels from 0 to 31 under the control of the display control unit 114. Here, the smaller the brightness value, the darker the value. In this embodiment, the TFT 115 is a transmissive liquid crystal display, but a reflective liquid crystal display, an organic EL display, or the like can also be used, and the display method is not limited as long as the display device can adjust the brightness of the display.

  The main switch 116 is a switch for starting up the digital camera 100. When the user turns on the main switch 116, the CPU 109 executes a predetermined program. Release switches 117 and 118 are switches for operating the automatic exposure adjustment function and the automatic focus adjustment function (release operation). After the above function is performed by the first stroke of the release button, the shutter is moved by the second stroke. Operate. In the present embodiment, the first release switch 117 is turned on by the first stroke (half-pressed state) of the release button, and the second release switch 118 is turned on by the second stroke (full-pressed state) of the release button.

  The card input / output unit 119 transmits commands to the memory card 121 inserted into the card slot 120 and transmits / receives various data to / from the memory card 121. The card slot 120 is a slot into which a memory card 121 that is a removable recording medium is inserted.

  The USB control unit 127 detects the insertion / removal of the USB connector at the USB terminal 128, and performs signal drive and control of USB connection communication. The LAN control unit 129 performs insertion / extraction detection of the wired LAN terminal 130, signal drive and control of communication for wired LAN connection, and signal drive and control of wireless LAN communication of the wireless LAN 131.

  The operation buttons 140 to 142 are selection buttons for instructing the CPU 109 on a user-desired process. The CPU 109 is controlled according to the pressing of the left selection button 140, the right selection button 141, and the setting button 142 and the operation state of the digital camera 100. For example, if the operation state of the digital camera 100 is the reproduction state, the user displays the previous image data by operating the left selection button 140 and displays the next image data by operating the right selection button 141. In addition, the currently connected display devices (TFT, VIDEO output, D terminal output, HDMI terminal output) can be displayed on the currently selected display device with a graphical user interface. And it can switch by selecting using an operation button (the left selection button 140, the right selection button 141, the setting button 142).

The development parameter change button (parameter change means) 143 is a button for confirming and setting development parameters, and can be performed with a graphical user interface by menu operation.
Further, the user can send image data to an external device such as a PC by USB communication if the USB connection is established by the menu operation using the operation buttons 140 to 143. The same applies to the operation of the wired LAN and the wireless LAN.

  The Av change dial 144, the Tv change dial 145, and the ISO change dial 146 are dials (parameter change means) for setting and changing the imaging parameters Av, Tv, and ISO, respectively. The external light sensor (measuring means) 200 detects the brightness (external light) around the digital camera 100. The CPU 109 can A / D convert the brightness of the external light detected by the external light sensor 200 and acquire a value (external light intensity) as digital data. In the present embodiment, the external light intensity takes values in 128 steps from 0 to 127, and the smaller the value, the darker the value.

  Here, the memory card (recording medium) 121 will be described. The memory card 121 has a function of recording or storing a compressed image signal, and includes a large-capacity nonvolatile semiconductor memory, a magnetic disk, an optical disk, or the like. The memory card 121 is electrically connected to the card input / output unit 119 while being inserted into the card slot 120. In this embodiment, the memory card 121 is used as a recording medium. However, other recording media such as a hard disk, an optical disk, a magneto-optical disk, a magnetic disk, and other solid-state memories may be used. .

  The CPU 109 controls the card input / output unit 119 according to the file format of the Exif standard and records the image data in the RAM memory 113 on the memory card 121 inserted into the card slot 120. The Exif standard file can record camera information when an image is captured by the digital camera 100 in the same file as the image data captured in the tag format. Exif camera information includes, for example, an aperture value (Av) tag, a shutter speed (Tv) tag, and a luminance value (hereinafter referred to as “Bv”) tag as camera information relating to brightness at the time of shooting. The aperture value (Av), shutter speed (Tv), and luminance value (Bv) are described in terms of APEX (Additive System of Photographic Exposure) units. In addition, there is a manufacturer note tag as camera information, and each digital camera manufacturer can add unique image information.

  Next, the operation of the digital camera 100 according to the present embodiment will be described.

  When the user turns on the second release switch 118, the digital camera 100 starts shooting based on the imaging parameters at that time. The CPU 109 instructs the development processing unit 112 to develop the RAW data in the frame memory 108 using the development parameters for display. The development processing unit 112 converts the RAW data into image format data for display and places it in a predetermined RAM memory 113.

  The CPU 109 outputs a subject image to the TFT 115 by controlling the display control unit 114. The CPU 109 sequentially outputs the subject image to the TFT 115, so that the TFT 115 can perform live view display. The display control unit 114 calculates white balance, color interpolation, color correction, γ conversion, and edge enhancement among the display development parameters by taking the development parameters for storage into account, thereby adjusting the color tone of the image of the shooting result. Can be displayed in live view. Furthermore, the display control unit 114 calculates a live view display that reproduces the exposure of the image of the photographing result by calculating color interpolation, color correction, and γ conversion among the display development parameters in consideration of the imaging parameter. It can be carried out.

  In the digital camera 100 of the present embodiment, a plurality of development parameter combinations assuming a specific shooting situation are prepared. The user operates the graphical user interface and the operation buttons 140 to 143 to select combinations of development parameter items (white balance, color interpolation, color correction, γ conversion, edge enhancement, resolution, recording method, and compression rate). You can select and set. Hereinafter, a combination of development parameter items is referred to as a “development parameter set”.

  FIG. 2 is a development parameter set selection screen in the TFT 115. For example, the development parameter set includes standard, person, landscape, and monochrome. When the user presses the development parameter change button 143 during the live view, a development parameter set selection setting screen in which the live view is displayed in the background is displayed on the TFT 115 as a menu. The user can select the development parameter set by moving the focus on the menu using the operation buttons 140 and 141, and can determine the set using the setting button 142. Even when the development parameter set is selected, the TFT 115 displays an image based on the selected development parameter set (display step). Therefore, the user can confirm the effect of the development parameter set in the live view. Further, the user can change the imaging parameter Av with the Av change dial 144, Tv with the Tv change dial 145, and ISO with the ISO change dial 146. Therefore, the user can confirm the change of the image by changing the shooting parameter in the live view during the change of the shooting parameter.

  Next, the automatic brightness adjustment operation of this embodiment will be described. FIG. 3 is a flowchart showing an automatic brightness adjustment operation in the present embodiment.

  First, the display control unit 114 starts an automatic brightness adjustment process (step S100). Next, the display control unit 114 turns off the end flag and proceeds to step S102 (step S101). Next, the CPU 109 measures the external light using the external light sensor 200, and proceeds to step S103 (measurement step) (step S102). Next, the CPU 109 calculates and sets the brightness of the TFT 115 corresponding to the external light intensity, which is the measurement result in step S102, and proceeds to step S104 (step S103).

  FIG. 4 is a table showing a correspondence relationship between the external light intensity as a measurement result and the brightness setting of the TFT 115. Here, the brightness of the TFT 115 is calculated using, for example, the table of FIG. According to FIG. 4, if the external light intensity is “0-3”, the brightness is set to “0”, and if the external light intensity is “124-127”, the brightness is set to “31”. . For example, if the external light intensity is “5”, the brightness setting is set to “1”. As described above, the brightness of the TFT 115 is increased as the measured external light intensity is increased, so that images, characters, and the like displayed on the TFT 115 can be easily viewed.

  Next, the CPU 109 checks the end flag, and if not on, proceeds to step S105, and if on, proceeds to step S106 and ends automatic brightness adjustment (step S104). Here, the end flag is turned ON in the brightness adjustment control operation described later. Next, when a predetermined time set in the RAM memory 113 or the non-volatile memory 111 (hereinafter referred to as “polling time”) elapses (S105), the CPU 109 proceeds to step S102 and measures external light again. . In the present embodiment, steps S102 to S105 are repeated at intervals of about 200 milliseconds.

  Next, the control operation for automatic brightness adjustment according to the present embodiment will be described. FIG. 5 is a flowchart showing the control operation of automatic brightness adjustment in the present embodiment. The brightness adjustment control operation starts when the screen display of the TFT 115 starts, and ends when the screen display of the TFT 115 is turned off. In the brightness adjustment control operation, the automatic brightness adjustment operation is changed or stopped in consideration of the content displayed on the TFT 115 and the operation for changing the imaging parameter and the development parameter.

  First, the display control unit 114 starts a control process for adjusting the brightness of the TFT 115 (step S200). Next, the display control unit 114 starts the automatic brightness adjustment operation described above, and proceeds to step S202 (step S201). Here, the display control unit 114 starts the automatic brightness adjustment operation described in the flowchart of FIG. 3 and performs the following operation.

  Next, if the display on the TFT 115 is a simulation display of development parameters or imaging parameters for storage by live view, the process proceeds to step S203, and if not, the process proceeds to step S208 (step S202). Next, the display control unit 114 changes the calculation method of the brightness setting of the TFT 115 to a calculation method that is less responsive to external light intensity than the normal calculation method, that is, the brightness is less likely to be changed. The process proceeds to step S204 (step S203).

  FIG. 6 is a table showing the relationship between the external light intensity during simulation display and the brightness setting of the TFT 115. Here, for example, the display control unit 114 changes the table for calculating the brightness of the TFT 115 from the external light intensity from the table of FIG. 4 to the table of FIG. 6. The table of FIG. 6 has a wider range of external light intensity corresponding to one brightness setting than the table of FIG. 4, and therefore the brightness of the TFT 115 is unlikely to change even if the external light intensity changes.

  In addition, as shown in FIGS. 4 and 6, the brightness setting is changed if the amount of change in the ambient light intensity is not less than a predetermined value, rather than widening the range of the ambient light intensity corresponding to one brightness setting. The brightness of the TFT 115 may be made difficult to change by increasing the predetermined value.

  Further, as a method of making the brightness of the TFT 115 difficult to change, there is a method of setting a long polling time in advance. For example, the polling time may be changed from 200 milliseconds to 5 seconds. In this way, even if the external light intensity changes, the interval at which the brightness of the TFT 115 is changed is long, and as a result, the brightness of the TFT 115 can be made difficult to change. In addition, there is a method of providing hysteresis in advance.

  Next, the display control unit 114 checks whether there is an operation for changing the imaging parameter and the development parameter. If there is a change operation, the process proceeds to step S205, and if there is no change operation, the process proceeds to step S208 (parameter change step) (step S204). In the present embodiment, the display control unit 114 checks whether the user has operated the Av change dial 144, the Tv change dial 145, and the ISO change dial 146.

  Next, the CPU 109 turns on the end flag to stop the automatic brightness adjustment, and proceeds to step S206 (step S205). Next, the CPU 109 measures the time after the change operation by the user is performed (S206), and proceeds to step S207. Next, before the predetermined time elapses after the change operation by the user, if the user operates the imaging parameter and the development parameter again, the process returns to step S206, and if not, the process returns to step S201 (display). Control step) (step S207). Here, the predetermined time is a time for stopping the automatic brightness adjustment operation, and is different from the polling time described above. Therefore, the length of the predetermined time here may be different from the above-described polling time (for example, 3 seconds).

  As described above, the display control unit 114 performs the automatic brightness adjustment while the user changes the imaging parameter and the development parameter and confirms the simulation display in which the effect is reflected in steps S204 to S207. Do not perform control. Thereby, the user can confirm the difference in the effect before and after the operation of the imaging parameter and the development parameter in the live view without being confused by unintended automatic brightness adjustment.

  Next, the CPU 109 returns to step S202 if the display of the TFT 115 is on, and proceeds to step S209 if the display is not on, and the display control unit 114 ends the brightness adjustment control (step S208). ).

  In the above-described flowchart of the brightness adjustment control operation, the display control unit 114 performs automatic brightness adjustment during simulation display by live view, but it may not be performed. In that case, in step S202, when the TFT 115 is performing simulation display by live view, the process proceeds to step S205, and the display control unit 114 stops the brightness adjustment operation. Then, after step S205, the CPU 109 performs step S207 without performing step S206. Here, if the determination content of step S207 by the display control unit 114 is changed and the live view simulation display is being performed by the TFT 115, the CPU 109 repeats step S207, and if not, the process returns to step S201.

  By performing this flow, the display control unit 114 can be controlled not to perform automatic brightness adjustment during live view simulation display by the TFT 115.

  In addition, control may be performed so that automatic brightness adjustment is not performed during live view regardless of whether simulation display is in progress. In that case, in step S202, it is determined whether or not the live view is being performed. If the live view is being performed, the process proceeds to step S205. Then, after step S205, step S207 is performed without performing step S206. Thereafter, if it is during live view, step S207 is repeated, and if it is not during live view, the process returns to step S201.

By performing this flow, the display control unit 114 can be controlled not to perform automatic brightness adjustment during live view by the TFT 115.
Even when such control is performed, a display mode (first display mode) other than the live view display mode (first display mode) such as when the menu screen is displayed on the TFT 115 or when the playback mode is set. 2), automatic brightness adjustment is performed.

  As described above, in the present embodiment, when the digital camera 100 performs the simulation display of the imaging parameter and the development parameter during the live view, the digital camera 100 can change the external light more than the normal automatic brightness adjustment. On the other hand, change to a brightness adjustment method with low responsiveness. Alternatively, automatic brightness adjustment is not performed. This makes it difficult for the brightness of the live view screen during simulation display to change automatically, and reduces the brightness change of the display screen unintended by the user due to automatic brightness adjustment.

  In addition, the display screen is difficult for the user to see for a large change in external light, but the display control unit 114 automatically adjusts the brightness unless the brightness adjustment method is a method that does not perform any adjustment. Does not impair its convenience. Further, when the user is changing the imaging parameter and the development parameter, the effect before and after the change is confirmed by comparing the simulation display on the live view screen. Therefore, the effect of the change operation can be easily confirmed by stopping the automatic brightness adjustment operation for a certain time after the change operation.

(Second Embodiment)
The digital camera 100 according to the second embodiment of the present invention re-develops image data arranged in the RAM memory 113 via the card slot 120, the USB terminal 128, the wired LAN terminal 130, and the wireless LAN 131.

  In the present embodiment, the display control unit 114 extracts compressed image data in JPEG format and RAW format from an Exif format file arranged in the RAM memory 113. Then, the CPU 109 converts the compressed data into a display format by decoding / resizing the compressed data. Here, the decoding / resize processing may use dedicated hardware instead of the CPU 109.

  Since the RAW format image data is added with development parameters at the time of photographing, the CPU 109 converts the image data into a display format using the development parameters. The user can confirm the image on the TFT 115 by displaying (reproducing) the image data converted into the display format on the display screen.

  The digital camera 100 according to the present embodiment performs redevelopment processing on the image data in the RAM memory 113 using the development parameters selected / changed by the user. Image data can be stored in a recording medium (memory card 121 and external medium) via the card slot 120, the USB terminal, the wired LAN terminal 130, and the wireless LAN 131 in the JEPG format. Furthermore, the digital camera 100 of the present embodiment displays the effect of the selected development parameter on the same display screen during the user's re-development processing operation.

  FIG. 7 is a flowchart showing a control operation of automatic brightness adjustment in the present embodiment. 7, components having the same reference numerals as those in FIG. 5 have the same functions, and thus detailed description thereof is omitted.

  First, in this embodiment, if the display of the TFT 115 is during the simulation display of the development result on the development parameter selection screen of the redevelopment process, the process proceeds to step S203, and if not during the simulation, the process proceeds to step S208 (step S302). Further, the display control unit 114 checks whether there is an operation for changing a development parameter for redevelopment. If there is an operation for changing a development parameter for redevelopment, the process proceeds to step S205, and if not, the process proceeds to step S208 (parameter change step) (step S304).

  After that, the display control unit 114 checks whether or not the development parameter changing operation for redevelopment is performed again before a predetermined time elapses after the changing operation. If the development parameter changing operation for redevelopment is performed again, the process proceeds to step S206, and if not, the process proceeds to step S201 (display control step) (step S307).

  As described above, in the present embodiment, when the digital camera 100 performs simulation display of development parameters for selecting development parameters for redevelopment, the digital camera 100 is more out of the normal automatic brightness adjustment. Change to a brightness adjustment method that is less responsive to light changes. This makes it difficult for the brightness of the live view screen during simulation display to change automatically, and reduces the brightness change of the display screen unintended by the user due to automatic brightness adjustment.

  Further, although it is difficult for the user to see the display screen with respect to a large change in external light, the display control unit 114 automatically adjusts the brightness, so that the convenience is not impaired. Also, when the user is changing the development parameters, the effect before and after the change is confirmed by the simulation display on the display screen. The effect of the change operation can be easily confirmed.

  The present invention can be implemented in various forms without departing from the spirit or main features thereof. Accordingly, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner.

It is a block diagram of the imaging device in embodiment of this invention. It is a development parameter set selection screen on the display screen. It is a flowchart which shows automatic brightness adjustment operation | movement. It is a table | surface which shows the correspondence of external light intensity | strength and brightness setting. It is a flowchart which shows control of the brightness adjustment in 1st Embodiment. It is a table | surface which shows the correspondence of the external light intensity | strength and brightness setting during simulation. It is a flowchart which shows the control of the brightness adjustment in 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Digital camera 101 Focusing lens 102 Zooming lens 103 Diaphragm 104 Image pick-up element 105 Preprocessing circuit 106 A / D converter 107 Image signal processing part 108 Frame memory 114 Display control part 115 TFT
143 Development parameter change button 144 Av change dial 145 Tv change dial 146 ISO change dial 200 Outside light sensor

Claims (14)

Display means for displaying an image of the subject based on image data acquired by imaging the subject;
Measuring means for measuring ambient brightness;
Parameter changing means for changing parameters relating to the image displayed on the display means;
Display control means for controlling the brightness of the display means based on the measurement result of the measurement means,
The display means displays an image reflecting the change of the parameter relating to the image by the parameter changing means;
The display control means is a control in which the brightness of the display means is less changed when the parameter relating to the image is changed by the parameter changing means than when the parameter relating to the image is not changed by the parameter changing means. An imaging apparatus characterized by performing The display control means is more responsive to the measurement result of the measuring means when the parameter relating to the image is changed by the parameter changing means than when the parameter relating to the image is not changed by the parameter changing means. imaging device according to claim 1, wherein the blunt. The interval at which the display control means changes the brightness of the display means when the parameter relating to the image is changed by the parameter changing means than when the parameter relating to the image is not changed by the parameter changing means. The imaging device according to claim 1 , wherein the imaging device is lengthened. The display control means changes the brightness of the display means if the amount of change in ambient brightness measured by the measurement means is a predetermined value or more,
When changing the parameters relating to the image by said parameter changing means, according to claim 1 to 3, characterized in that to increase the predetermined value than when not change the parameters relating to the image by the parameter changing means The imaging device according to any one of the above.   The imaging apparatus according to claim 1, wherein the display control unit does not change the brightness of the display unit when the parameter related to the image is changed by the parameter changing unit.   The display control means does not change the brightness of the display means until a predetermined time elapses after the parameter change means changes the parameter relating to the image. The imaging apparatus of any one of Claims. Display means for displaying an image of the subject based on image data acquired by imaging the subject;
Measuring means for measuring ambient brightness;
Parameter changing means for changing parameters relating to the image displayed on the display means;
Display control means for controlling the brightness of the display means based on the measurement result of the measurement means,
The display means does not display a first display mode for displaying an image reflecting the change of the parameter related to the image by the parameter changing means, and an image reflecting the change of the parameter related to the image by the parameter changing means. Having a second display mode;
The image pickup apparatus according to claim 1, wherein the display control unit performs control such that the brightness of the display unit is less likely to change when the display unit is in the first display mode than when the display unit is in the second display mode . Wherein the display control unit, wherein when the display means of the first display mode, according to claim 7, characterized in that the dull responsiveness to the measurement result of the measuring means than in the second display mode The imaging device described.   The imaging apparatus according to claim 7, wherein the display control unit does not change a brightness of the display unit when the display unit is in the first display mode.   The parameter relating to the image is at least one of a parameter relating to a shooting condition of the imaging apparatus when the image data is acquired and a parameter relating to the image quality of the image data. The imaging device according to item. The imaging apparatus according to claim 1, wherein the display control unit controls brightness of a display of the display unit. The display means has a backlight,
The imaging apparatus according to claim 11, wherein the display control unit controls brightness of the backlight. A display step of displaying an image of the subject on a display means based on image data acquired by imaging the subject;
A measurement step for measuring ambient brightness;
A parameter changing step for changing a parameter relating to the image displayed on the display means;
A display control step for controlling the brightness of the display means based on the measurement result of the measurement step;
Have
The display step displays an image reflecting the change of the parameter relating to the image in the parameter changing step,
In the display control step, when the parameter relating to the image is changed in the parameter changing step, the brightness of the display means is less likely to change than when the parameter relating to the image is not changed in the parameter changing step. image display method and performing. A display step of displaying an image of the subject on a display means based on image data acquired by imaging the subject;
A measurement step for measuring ambient brightness;
A parameter changing step for changing a parameter relating to the image displayed on the display means;
A display control step of controlling the brightness of the display means based on the measurement result of the measurement step,
The display step includes a first display mode for displaying an image reflecting the change of the parameter related to the image in the parameter changing step, and an image reflecting the change of the parameter related to the image in the parameter changing step. A second display mode that does not display;
In the display control step, when the display unit is in the first display mode, control is performed such that the brightness of the display unit is less likely to change than in the second display mode.

Images