JP2021158560A - Display device and control method of the same - Google Patents

Abstract

To provide a display device that eliminates the need to return image capture settings and display settings of an image displayed in a finder when observing a different subject.SOLUTION: A display device 100 includes a viewfinder 120, which displays an image acquired by imaging means 102, detection means 130, which detects that an object has left the viewfinder 120, and control means 112, which controls to change at least one of image capture settings and display settings of the image when an object has left the viewfinder 120.SELECTED DRAWING: Figure 1

Description

The present invention relates to a display device used when a user magnifies a distant view or the like and a control method thereof, and particularly to a device that controls a display state of a display unit in response to approach detection.

There are so-called digital binoculars provided with an imaging unit that uses image light as an electrical image signal and a display unit that displays an image captured by the imaging unit. Digital binoculars have an optical system such as a lens with a relatively high magnification, and magnify and display a distant subject to show it to the user. Since the image signal can be digitally processed, various image processing such as digitally zooming a part of the image or brightening the image obtained by capturing the image in a dark situation is displayed. Is possible.

Further, as a conventional technique that discloses a technique relating to display control of a captured image displayed on a display unit of a camera or binoculars, for example, there are the following techniques. Patent Document 1 describes a technique of turning off the display of the finder when the eyepiece detection function detects eye loss and switching the display to another display device installed outside the finder.

Japanese Unexamined Patent Publication No. 2014-209712

By the way, when changing the observation target to a subject in a different direction, the user temporarily takes his eyes off the binoculars, checks the whole view, and then wears the binoculars again in order to capture another target subject. I need to look into it. At that time, if the imaging settings such as the zoom magnification and the display settings are held as they were when observing the previous subject, the field of view is limited, and it is difficult to capture a new subject. Therefore, the user needs to manually change the settings to get a wider field of view. However, in the prior art disclosed in Patent Document 1, when the user takes his eyes off the finder, the display is switched to another display device, but the imaging setting and the display setting at that time are the settings displayed on the finder. Will be the same as. Therefore, the user has to manually return the display setting every time the object to be observed is changed.

Therefore, an object of the present invention is to provide a display device that saves the trouble of returning the imaging setting and the display setting of the image to be displayed in the finder when observing another subject.

In order to achieve the above object, the display device of the present invention has a finder for displaying an image acquired by an imaging means, a detecting means for detecting that an object has been separated from the finder, and an object separated from the finder. In the case of the case, it is characterized by having a control means for controlling to change at least one of the imaging setting and the display setting of the image.

According to the present invention, it is possible to provide a display device that saves the trouble of returning the imaging setting and the display setting of the image to be displayed in the finder when observing another subject.

It is a block diagram which shows the structural example of the display device which concerns on embodiment of this invention. It is a flowchart which shows the process of the system control part which concerns on 1st Embodiment. It is a figure exemplifying the image to be displayed in a finder. It is a block diagram which shows the structural example of the display device which concerns on 2nd Example. It is a flowchart which shows the process of the system control part which concerns on 2nd Example. It is a block diagram which shows the structural example of the display device which concerns on 3rd Example. It is a flowchart which shows the process of the system control part which concerns on 3rd Example. It is a figure which shows the display example at the time of observation using the tracking function.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows an example of the configuration of the display device 100 according to the embodiment of the present invention. The display device 100 of this embodiment is digital binoculars.

In the configuration shown in FIG. 1, the lens system 101 is composed of a plurality of lenses and is driven by a lens driving unit. The lens driving unit 113 drives the lens system 101 to adjust the focus and zoom. The subject image obtained through the lens system 101 is formed on the imaging surface of the imaging unit 102. The image pickup unit 102 is composed of a CMOS sensor, a CCD sensor, and the like, and outputs image data to the image processing unit 110 by photoelectrically converting a subject image and converting it into an electric signal. The image processing unit 110 performs resize processing such as predetermined pixel complementation and reduction, white balance adjustment, and image processing such as gamma correction on the data from the image pickup unit 102 or the memory unit 111. Further, the image processing unit 110 outputs the generated image to the first display unit 120 and the second display unit 121. The memory unit 111 is a storage means including a DRAM, an SRAM, or the like. The finder 120 is composed of a first display unit 121 and a second display unit, and displays an image generated by the image processing unit 110. The finder 120 may further include an eye cup for reducing the influence of external light and the like. The first display unit 120 and the second display unit 121 are configured by, for example, an EVF (Electronic View Finder) realized by an LCD or an OLED. For example, the user observes the display image of the first display unit 120 with the left eye and the display image of the second display unit 121 with the right eye. The eyepiece detection unit 130 detects the usage state of the display device 100 by the user. For example, the eyepiece detection unit 130 detects whether or not the eye (object) is in close proximity to the finder 120 by using an infrared sensor or the like. When an object approaches, the infrared rays projected from the light projecting unit (not shown) of the eyepiece detection unit 130 are reflected and received by the light receiving unit (not shown) of the infrared proximity sensor. From the amount of infrared rays received, it is possible to determine how close the object is from the eyepiece (eyepiece distance). The infrared proximity sensor is an example, and the eyepiece detection unit 130 may employ another sensor as long as it can detect the approach of an eye or an object that can be regarded as an eyepiece. The system control unit 112 controls the lens driving unit 113, the imaging unit 102, and the image processing unit 110. Further, the system control unit 112 controls the display state of the first display unit 120 and the second display unit 121 based on the information output from the eyepiece detection unit 130.

[Example 1]
Hereinafter, the operation of the display device 100 according to the first embodiment of the present invention will be described with reference to FIGS. 2 to 3. In the first embodiment, the operation when the user takes his / her eyes off the state of looking into the finder 120 in order to observe the subject and then looks into the finder 120 again in order to observe another subject will be described.

FIG. 2 is a flowchart showing a process performed by the system control unit 112. In step S201, when the power of the display device 100 is turned on, the system control unit 112 detects the usage state of the display device 100. Specifically, the system control unit 112 acquires detection information from the eyepiece detection unit 130, and determines whether or not the eye (object) is close to the finder 120 based on the acquired detection information. If it is determined in step S201 that the eyepiece is not in the eyepiece state, that is, the eyepiece is not in the eyepiece state, the process proceeds to step S201. On the other hand, if it is determined in step S201 that the eyepiece is in the eyepiece state, the process proceeds to step S202. In step S202, when the automatic initialization setting is set to ON, settings related to framing (image display setting and imaging setting) such as zoom setting, focus setting, and trimming setting are initialized. The value to be initialized may be a fixed value, or the user may be able to set an initial value in advance. It is desirable that this initial value is set so that the imaging range is as wide as possible in order to make it easier to find the subject. In step S203, the system control unit 112 controls to display the live view image on the finder 120. Specifically, the captured image obtained by the imaging unit 102 via the lens system 101 is image-processed by the image processing unit 110 to generate a live view image. At this time, the system control unit 112 controls the lens driving unit 113 and the image processing unit 110 with the set values initialized in step S202.

FIG. 3A is a display example of the live view image at this time. As the framing setting at this time, the initial value set in step S202 is set, and the setting that widens the angle of view of the captured image is used. After that, if the observation is continued with the framing setting as it is (NO in step S204), the process proceeds to step S206. On the other hand, when the user performs framing (YES in step S204), the process proceeds to step S205, and framing such as zoom setting, focus setting, and trimming setting is performed by looking into the finder 120.

FIG. 3B is a display example in which the user adjusts the zoom magnification and the like in step S205 to perform framing in order to magnify and observe the subject 1 in FIG. 3A. In step S206, the system control unit 112 detects the usage state of the display device 100, as in step S201. If it is determined in step S206 that the eyepiece is in the eyepiece state, it can be determined that the observation of the subject is being continued, so the process proceeds to step S204. On the other hand, if it is determined in step S206 that the eyepiece is not in the eyepiece state, that is, in the non-eyepiece state, it is determined that the observation of the subject is interrupted, and the process proceeds to step S207. In step S207, the system control unit 112 controls to turn off the display of the finder 120. After that, a case where the user looks into the finder 120 again in order to observe the subject 2 in FIG. 3A as another subject will be described. If it is determined in step S201 that the eyepiece is in the eyepiece state, the process proceeds to step S202. In step S202, the initial value of framing is set as in the case of turning on the power, and the process proceeds to step S203.

In this way, since the initial value of the framing setting is automatically set, in step S203, the user simply points the display device 100 in the same direction as the previously observed direction, which is almost the same as in FIG. 3 (a). You can see the live view image. After that, when the user magnifies and observes the subject 2 in FIG. 3A (YES in step S204) as in the case of observing the subject 1, the process proceeds to step S205, and framing is performed while looking through the finder 120. conduct. FIG. 3C is a display example in which the user adjusts the zoom magnification and the like in step S205 to perform framing in order to magnify and observe the subject 2 in FIG. 3A.

With the above operation, when you take your eyes off the viewfinder, the previous framing settings are automatically initialized, so you can save the trouble of restoring the framing settings when the user observes another subject.

In the proximity sensor of the eyepiece detection unit 130, the value of the distance determined to be the eyepiece state is an arbitrary value. For example, the designer or the like sets an appropriate value in advance for the display device 100 or changes it as appropriate. Can be done. In addition, it may be changed as appropriate according to the instruction from the user or the like.

[Example 2]
Hereinafter, the operation of the display device 100 according to the second embodiment of the present invention will be described with reference to FIGS. 4 to 5. The second embodiment is an example of controlling so that the framing setting is not initialized within a certain period of time even if the eyes are separated from the finder 120.

FIG. 4 is a configuration example of the display device 100 of the second embodiment. The difference from the first embodiment shown in FIG. 1 is that the timer 431 is added and the processing of the system control unit 412 due to the addition of the timer 431 is different. In addition, the block described in the first embodiment The same reference numerals are used for the same ones as above, and the description thereof will be omitted. The timer 431 measures various times. The timer 431 measures, for example, the elapsed time from the time when the eyepiece detection unit 130 detects the non-eyepiece state. The system control unit 412 controls the lens driving unit 113, the imaging unit 102, and the image processing unit 110. Further, the system control unit 412 controls the display states of the first display unit 120 and the second display unit 121 based on the information output from the eyepiece detection unit 130 and the information output from the timer 431.

FIG. 5 is a flowchart showing a process performed by the system control unit 412 of the second embodiment. Since steps S201 to S206 are the same as those in the first embodiment, the same reference numerals are used and the description thereof will be omitted. If it is determined in step S206 that the eyepiece is not in the eyepiece state, that is, in the non-eyepiece state, it is determined that the user's eye is away from the finder 120, and the process proceeds to step S501. In step S501, the system control unit 412 determines the eyepiece state based on the detection result of the eyepiece detection unit 130 from the time when the non-eyepiece state is determined in step S206 until the determination time (T1) elapses. Determine if it has been detected. Here, the determination time (T1) is a preset time for determining whether or not to stop the display of the live view image on the first display unit 121 and the second display unit 122 in the finder 120. Is. If it is determined in step S501 that the non-eyepiece state continues for the determination time (T1), it is determined that the observation has been interrupted, and the system control unit 412 proceeds to the process in step S502. In step S502, the system control unit 412 stops displaying the live view image on the finder 120. On the other hand, if it is determined in step S501 that the non-eyepiece state has not continued for the determination time (T1), it is determined that the eyes have only temporarily separated, and the system control unit 412 performs the process in step S204. Proceed to.

As described above, by providing a period in which the framing settings are not initialized even if the user takes his / her eyes off the viewfinder, even if the user unintentionally takes his / her eyes off the viewfinder or temporarily takes his / her eyes off the viewfinder. , The observation can be continued.

The value of the determination time (T1) is an arbitrary value, and for example, a designer or the like can set an appropriate value in advance for the display device 100 or change it as appropriate. Further, the value of the determination time (T1) may be appropriately changed according to an instruction from the user or the like.

[Example 3]
Hereinafter, the operation of the display device 100 according to the third embodiment of the present invention will be described with reference to FIGS. 6 to 8. The third embodiment is an example in which the framing setting is not initialized when the previous subject is found when the observation is started again after observing using the subject tracking function.

FIG. 6 is a configuration example of the display device 100 of the third embodiment. The difference from the first embodiment shown in FIG. 1 is that the subject detection unit 601 is added and the processing of the system control unit 612 due to the addition of the subject detection unit 601 is different. For the same blocks as those described in the above, the same reference numerals are used and the description thereof will be omitted.

The subject detection unit 601 detects the position and size of the subject area from the image data within the imaging range of the image memory unit 111 based on the color information of the subject and the like. By continuously performing this on the image data for each sampling displayed as a live view, it is possible to track the movement of the subject.

FIG. 7 is a flowchart showing a process performed by the system control unit 612 of the third embodiment. Since steps S201 to S207 are the same as those in the first embodiment, the same reference numerals are used and the description thereof will be omitted.

In step S701, the subject observed by using the tracking function at the time of the previous observation is detected from the captured image. If the previously observed subject could not be detected in step S701, the process proceeds to step S204 with the framing settings initialized in step S202. On the other hand, if the subject previously observed in step S701 can be detected, the process proceeds to step S702 to reflect the framing setting saved in step S703 described later. In step S703, in step S206, the framing setting when it is determined that the observation of the subject is interrupted is saved. In step S704, the subject information detected by the subject detection unit 601 is saved.

FIG. 8 shows a display example when observing using the tracking function. FIG. 8A is an example of image data within the imaging range when observing using the tracking function at the time of the previous observation. 8 (b) shows the subject detected at the detection position 1 in FIG. 8 (a), and the zoom setting, trimming setting, etc. are set in S204 so that the subject is displayed as shown in FIG. 8 (b) in the viewfinder. This is an example of framing. FIG. 8C shows an example of captured image data when the subject observed by using the tracking function last time can be detected at the detection position 2 in S701 when the observation is resumed. At this time, if the framing setting saved last time in S702 is reflected, it is displayed in the finder as shown in FIG. 8B as in the case of the previous observation.

By the above operation, when the same subject is observed again after the observation of the subject is interrupted, the observation can be resumed with the same framing setting.

[Other Examples]
The present invention supplies a program that realizes one or more functions of the above-described embodiment to a system or device via a network or storage medium, and one or more processors in the computer of the system or device reads and executes the program. It can also be realized by the processing to be performed. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and modifications can be made within the scope of the gist thereof.

For example, in the display devices of Examples 1 to 3, an image was acquired by an imaging unit in the display device. However, the display device may be provided with a communication unit that communicates with the outside of the display device instead of the image pickup device, and an image taken by an external image pickup device may be acquired via the communication unit.

Further, the present invention is applicable to a display device having a finder other than digital binoculars. For example, the present invention is applicable to digital cameras and head-mounted displays having an EVF.

100 Display device 101 Lens system 102 Imaging unit 110 Image processing unit 111 Memory unit 112 System control unit 113 Lens drive unit 120 Finder 121 First display unit 121 Second display unit 130 Eyepiece detection unit

Claims (12)

A viewfinder that displays the image acquired by the imaging means,
A detection means for detecting that an object has moved away from the finder,
A display device comprising: a control means for controlling so as to change at least one of an imaging setting and a display setting of the image when an object is separated from the finder. When the object is separated from the finder, the control means controls the finder to display an image having a wider angle of view than the image displayed on the finder before the object is separated from the finder. The display device according to claim 1, wherein the display device is characterized. The display device according to claim 1 or 2, wherein the control means is controlled so as to change the zoom setting. The display device according to any one of claims 1 to 3, wherein the control means is controlled so as to change the focus setting. The display device according to any one of claims 1 to 4, wherein the control means is controlled so as to change the trimming setting. One of claims 1 to 5, wherein the control means controls to initialize at least one of the imaging setting and the display setting when the object is separated from the finder. The display device described in. The display device according to claim 6, wherein the initialization value is a preset value. The control means according to claim 1 to 7, wherein when the object is separated from the finder by a distance longer than a preset distance, at least one of the display setting and the imaging setting is changed. The display device according to any one item. The control means according to claim 1 to 8, wherein when the object is separated from the finder for a time longer than a preset time, at least one of the display setting and the imaging setting is changed. The display device according to any one item. When the object is separated from the finder while using the tracking function for tracking the subject, the control means obtains an image having the same angle of view as the image displayed on the finder before the object is separated from the finder. The display device according to any one of claims 1 to 9, wherein the display device is controlled so as to be displayed on the finder. The step of displaying the image acquired by the imaging means in the viewfinder,
A step of detecting that an object has moved away from the finder,
A method for controlling a display device, which comprises a step of controlling to change at least one of an imaging setting and a display setting of the image when an object is separated from the finder. A program for causing a computer to execute each step of the display device control method according to claim 11.

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