JP2019062470A - Information processing apparatus, information processing method, and program - Google Patents

Abstract

To provide a technology for assisting a user to change to a desired zoom magnification more easily when changing the zoom magnification of an optical lens.SOLUTION: Lens information acquisition means is a lens that can optically change a zoom magnification and acquires lens information regarding a lens used in an imaging apparatus. Angle-of-view acquisition means acquires angle-of-view information that specifies the angle of view of an image captured by the imaging apparatus. Calculation means calculates, on the basis of the lens information and the angle of view information, zoom information relating to the zoom magnification of the lens for setting the angle of view specified by the angle of view information. Display control means causes the display means to display the zoom information calculated by the calculation means.SELECTED DRAWING: Figure 2

Description

  The present invention relates to information processing technology related to an imaging device.

  In recent years, surveillance camera systems using networks have become widespread. Surveillance camera systems are used in a wide range of fields such as large-scale public organizations and small stores, and there are various forms of operation methods. In particular, surveillance cameras using a network are called network cameras.

  The network camera has various functions to match the operation mode. There are a network camera that can change the imaging direction in the pan direction and the tilt direction, a network camera that can be zoomed in at a high magnification, and the like. In addition, an interchangeable lens network camera capable of replacing the lens with one suitable for the user's environment has been introduced.

  In a lens interchangeable type network camera, a mount portion for lens attachment is provided on a network camera body. Then, a lens compatible with the mount unit is mounted and used. At this time, not only the lens dedicated to the network camera but also a mount common to a lens used for a compact digital camera or a single lens reflex camera may be used as the shape of the mount. In such a case, a lens for a single-lens reflex camera used by the user can also be attached to the surveillance camera. Therefore, the number of selectable lenses increases, and imaging suitable for various scenes becomes possible.

  When monitoring with a network camera, the imaging direction and the zoom factor are determined at the time of installation. The angle of view determined at the time of installation may not be changed after that. However, if the user's monitoring target changes, the setting of the network camera may be changed. In that case, the angle of view and the opening and closing of the aperture can be changed by sending a command from the external client device to the network camera.

  Here, when using a lens adopted in a single-lens reflex camera, many lenses can only change the zoom manually. For this reason, when changing the zoom magnification after installing the camera, it is necessary to change the zoom magnification at the installation location of the camera and then to check the image in the monitoring room where the monitoring is performed. This is because, in the case of a network camera, the location where imaging is performed and the location where surveillance is performed are often separated.

  At this time, if the changed zoom magnification is not the desired zoom magnification, the zoom magnification is changed again to check the image. Then, in order to pick up an image of a desired imaging range, the user needs to repeat the work of changing the zoom ratio and checking the image many times.

  Here, in Patent Document 1, it is informed to the user whether or not the lens connected to the imaging apparatus can be electrically zoomed, and the electrically zoomable lens is remotely operated by the user. Further, Patent Document 2 describes that, in an imaging apparatus provided with both an optical zoom and an electronic zoom, switching which of the optical zoom and the electronic zoom is to be moved according to the zoom magnification set by the user.

JP, 2012-095167, A JP 2004-157957 A

  However, the technique described in Patent Document 1 can only inform the user whether the lens can be operated electrically. Further, in the technology described in Patent Document 2, switching is performed between the optical zoom and the electronic zoom, but in the electronic zoom, the resolution of the image after the zoom is lowered.

  Therefore, an object of the present invention is to provide a technology for assisting the user to change to a desired zoom magnification more easily when changing the zoom magnification of an optical lens.

  In order to solve the above-mentioned subject, an image processing device of the present invention is provided with the following composition. That is, a lens capable of optically changing the zoom magnification, and lens information acquisition means for acquiring lens information on a lens used in an imaging device, and an image for specifying an angle of view of an image captured by the imaging device Based on the angle of view acquiring means for acquiring angle information, and the lens information and the angle of view information, zoom information on the zoom magnification of the lens for setting the angle of view specified by the angle of view information is calculated. A calculation unit and a display control unit that causes the display unit to display the zoom information calculated by the calculation unit.

  According to the present invention, when changing the zoom magnification of the optical lens, the user can more easily change the zoom magnification to a desired zoom magnification.

It is a network block diagram containing the imaging device concerning each embodiment. It is a block diagram showing composition of an imaging device and a client device of a 1st embodiment. It is a flowchart for demonstrating the operation | movement of 1st Embodiment. It is a figure for demonstrating the operation | movement of the optical zoom magnification detection part of 1st Embodiment. It is a figure for demonstrating the specification example of the view | field angle of 1st Embodiment. It is a figure for demonstrating the designation | designated example of the view | field angle of 1st Embodiment. It is a flowchart for demonstrating the operation | movement of 1st Embodiment. It is a figure for demonstrating the example of the information presentation of 1st Embodiment. It is a figure for demonstrating the example of the information presentation of 1st Embodiment. It is a figure for demonstrating preservation | save of the zoom information of 1st Embodiment. It is a flowchart for demonstrating the operation | movement of 2nd Embodiment. It is a figure for demonstrating the presentation example of the moving amount | distance of the imaging direction of 2nd Embodiment. It is a block diagram showing composition of an imaging device and a client device of a 3rd embodiment. It is a block diagram which shows the hardware constitutions of each embodiment.

  Hereinafter, embodiments of the present invention will be described in detail based on the attached drawings. The configurations shown in the following embodiments are merely examples, and the present invention is not limited to the configurations described in the following embodiments. Moreover, although each embodiment demonstrates an example for the monitoring objective, each embodiment is also applicable to the imaging technique for various objectives, such as a broadcast objective. Also, in the following description, an imaging apparatus (network camera) that can connect to a network and communicate with another apparatus will be described as an example, but the present invention is also applicable to an imaging apparatus that can not connect to a network.

First Embodiment
FIG. 1 is a system configuration diagram including an imaging apparatus main body (information processing apparatus) 100. The client device 140 is an external device of the imaging device main body 100. The imaging apparatus main body 100 and the client device 140 are connected in a mutually communicable state via the network 130. The imaging device main body 100 functions as an imaging device when the interchangeable lens 110 is attached.

  The client apparatus 140 transmits, to the imaging apparatus main body 100, a distribution request command for requesting transmission of captured image data, and a setting command for setting parameters related to compression encoding.

  Further, the imaging apparatus main body 100 transmits image data to the client apparatus 140 in response to the distribution request command. The client device 140 transmits a command for requesting various information to the imaging device main body 100, and receives the requested information from the imaging device main body 100 as a response. The client device 140 can also be realized by installing a program on a computer such as a personal computer, a tablet terminal, or a smartphone.

  FIG. 2 is a block diagram showing the imaging apparatus main body 100 having the lens mount portion 120, the interchangeable lens 110, and the client device 140.

  The imaging apparatus main body 100 includes a lens mount unit 120, an imaging unit 310, an encoding unit 340, a communication unit 350, a storage unit 330, and a control unit 320. Further, the imaging apparatus main body 100 includes a lens information acquisition unit 101, an optical zoom magnification detection unit 102, an angle of view reception unit (angle of view acquisition unit) 103, a zoom information calculation unit 104, and a zoom information presentation unit 105. There is. The imaging apparatus main body 100 can be mounted with an interchangeable lens.

  The interchangeable lens 110 is a lens connectable to an interchangeable lens imaging device. The interchangeable lens is attached to the lens mount unit 120. The interchangeable lens 110 also has a storage unit storing lens information described later, and a function of outputting lens information to the lens mount unit 120.

  The lens mount portion 120 has a holding mechanism for holding the interchangeable lens 110. It is possible to mount an interchangeable lens that matches this holding mechanism. The lens mount unit 120 also has a function to supply power to the interchangeable lens 110. The lens mount unit 120 also has terminals for acquiring various lens information from the interchangeable lens 110.

  The imaging unit 310 receives the light focused through the interchangeable lens 110 by the imaging device, converts the received light into electric charge, and generates image data. For example, image data of a moving image is generated. For example, a complementary metal oxide semiconductive image sensor (CMOS image sensor) can be used as the imaging device. In addition, a CCD image sensor (charge coupled device image sensor) may be used as the imaging device. In addition, the imaging unit 310 may generate (acquire) image data in which the white balance, the exposure, and the like are appropriately adjusted according to the parameters set through the control unit 320.

  The control unit 320 controls the operation of each unit in the imaging apparatus main body 100 and performs various types of processing. For example, camera parameters such as white balance and exposure are set in the imaging unit 310, and coding parameters related to compression coding are set in the coding unit 340.

  The encoding unit 340 compresses and encodes the image data generated by the imaging unit 310. The encoding unit 340 may, for example, H.264 / AVC and H.264. Perform compression coding in compliance with H.265 / HEVC. The coding scheme is not limited to these.

  The storage unit 330 stores programs required when the control unit 320 performs processing, various information, and the like. For example, information related to camera parameters such as white balance and exposure for image data acquired by the imaging unit 310, parameters related to compression encoding, lens information described later, and the like are stored. These pieces of information are read and used by other units as appropriate.

  The communication unit 350 transmits the image data encoded by the encoding unit 240 to the client device 140 through the network 130, for example, in a stream format. Also, various commands are received from the client device 140.

  The lens information acquisition unit 101 acquires lens information on the currently mounted lens from the interchangeable lens 110 via the lens mount unit 120. When the communication unit 350 is connected to an external network, identification information capable of specifying the interchangeable lens 110 is acquired from the interchangeable lens 110, and lens information is acquired via the network based on the identification information. May be acquired. Also, an information table in which lens identification information and lens information are associated may be stored in the storage unit 330, and lens information may be acquired from the information table. The details of the lens information will be described later.

  The optical zoom magnification detection unit 102 detects the optical zoom magnification of the interchangeable lens 110 currently mounted. The optical zoom is a function of moving the lens to optically change the magnification of the captured image. The method of detecting the optical zoom magnification (optical zoom position) will be described later. Note that the optical zoom magnification detection unit 102 does not have to detect a value representing the optical zoom magnification itself, and may detect a value corresponding to the optical zoom magnification. For example, it may be a focal length.

  The angle-of-view accepting unit 103 acquires information indicating an angle of view desired by the user. The information indicating the angle of view is specified by, for example, an operation by the user, and the angle of view receiving unit 103 receives the operation.

  The angle of view is, for example, an angle formed by a line from the imaging position formed by the interchangeable lens 110 from the imaging position to the left end of the imaging range and a line from the imaging position to the right end of the imaging range. be able to. However, in each embodiment, the angle of view is not limited to the angle representing the imaging range of the image data generated by the imaging unit 310. For example, the imaging range itself represented by coordinates is also referred to as an angle of view.

  The zoom information calculation unit 104 acquires information indicating the current optical zoom magnification detected by the optical zoom magnification detection unit 102 and the angle of view specified by the user through the angle of view reception unit 103. Then, based on the information, it is calculated how much the user can specify the angle of view if the current optical zoom magnification is changed. For example, the zoom information related to the optical zoom for realizing the angle of view specified by the user is calculated. For example, the zoom information is zoom magnification (optical zoom magnification). The method of calculating the zoom factor will be described later. The zoom information may not be the optical zoom magnification itself, but may be information relating to a value corresponding to the optical zoom magnification. For example, as described above, it may be information indicating a focal length. Thus, the zoom information calculation unit 104 calculates zoom information corresponding to the optical zoom magnification for realizing the angle of view specified by the user.

  The zoom information presentation unit 105 presents the user with zoom information regarding the optical zoom magnification calculated by the zoom information calculation unit 104. The presentation method to the user will be described later.

  The operation of the imaging apparatus main body 100 according to the present embodiment will be described with reference to the flowchart of FIG.

  First, in S300, the lens information acquisition unit 101 acquires lens information. The lens information includes at least one of identification information for identifying a lens, such as a model number of the lens, and information indicating a current zoom magnification. Further, the lens information may include, for example, information indicating the number of times of use of each drive unit, such as a focus and an aperture, and the current setting value.

  Here, the timing at which the lens information acquisition unit 101 acquires lens information may be only when the power is turned on or when the lens is attached, or may be acquired periodically. Further, the lens information acquisition unit 101 may not be provided. In that case, the user inputs information about the lens into the imaging apparatus main body 100 via the operation unit (not shown). For example, the user selects data corresponding to the interchangeable lens mounted on the imaging apparatus main body 100 from the GUI for selecting the lens model number.

  Next, in S301, the optical zoom magnification detection unit 102 detects the current optical zoom magnification based on the lens information. If the lens information includes information indicating the current optical zoom magnification, the value can be used without calculation. The value detected at this time is not a value indicating the zoom magnification itself, but may be a value corresponding to the zoom magnification.

  Further, for example, as shown in FIG. 4, since the range in which the optical zoom can be performed differs depending on the lens, the current optical zoom magnification may be included in the lens information at a normalized value. For example, as shown in FIG. 4, the case where the value (maximum optical zoom position) representing the maximum optical zoom magnification and the minimum optical zoom magnification (minimum optical zoom position) are included in the lens information 400 will be described. In this example, the focal length (zoom position) may be calculated instead of the zoom magnification.

  In the example of FIG. 4, the lens information 400 includes a value (focal length) representing an optical zoom position corresponding to the current zoom magnification. In this case, the optical zoom magnification detection unit 102 calculates a focal length corresponding to the current optical zoom magnification based on the lens information 400. In the example shown in FIG. 4, it can be calculated as (250−55) × 30/100 = 113.5 mm.

  If the lens information does not include the maximum optical zoom magnification and the minimum optical zoom magnification, an information table describing the maximum optical zoom magnification and the minimum optical zoom magnification for each lens prepared in advance based on the lens type information You may get them from.

  Next, in S302, the user inputs field angle information indicating a desired field angle via the operation unit (not shown). The operation unit is, for example, a mouse, a keyboard, or a touch panel. The angle of view information is information on the angle of view after change desired by the user. The changed angle of view refers to the desired angle of view after the optical zoom.

  An example of the method of inputting the angle of view information will be described with reference to FIGS. 5 and 6. FIG. 5 shows a method of inputting angle-of-view information using electronic zoom processing for enlarging an image by image processing.

  As an example, under the control of the control unit 321 of the client device 140, the image 500 captured by the imaging device is displayed on the display device 150. Then, the user performs an operation of designating the magnification of the digital zoom on the client apparatus 140 via the operation unit. For example, as indicated by 501, an operation of specifying a frame indicating a desired angle of view is performed. In response to the operation, the control unit 321 enlarges the area corresponding to the designated frame (electronic zoom) and displays the enlarged image 502. The control unit 321 may correct or restrict the range designated by the user to a form similar to the imaging range of the imaging unit 310 as necessary. In addition, the control unit 321 may correct or restrict the range designated by the user such that the center of the imaging range of the imaging unit 310 coincides with the center, as necessary. Thus, the control unit 321 also functions as a display control unit.

  Here, the angle of view specified by the user is represented by angle of view information 503 indicating coordinates in the image (for example, coordinates corresponding to the upper left of the enlarged image 502 in the image 500), lengths in the vertical direction, and lengths in the horizontal direction. Be done. The value specified by the user is the angle of view information required to calculate the zoom information described later. By thus performing the electronic zoom, the user can specify the angle of view information while making the user recognize the changed angle of view.

  Also, as shown in FIG. 6, digital zoom may not be performed. Thus, when adjusting the angle of view frame set by the user, the user can adjust the angle of view while checking what is displayed outside the frame.

  In addition to this, an object detection unit (not shown) detects a subject such as a person appearing in a video by the imaging apparatus main body 100, and sets information indicating an angle of view in which the object fits as angle of view information. May be This is because a subject such as a person is likely to be monitored.

  Next, in S303, the zoom information calculation unit 104 performs an optical zoom magnification to realize the designated angle of view based on the current optical zoom magnification and the angle of view information indicating the angle of view designated by the user. Calculate The details of the calculation method will be described with reference to FIG.

  First, in S701, the zoom information calculation unit 104 acquires information indicating the current optical zoom magnification detected in S301 via the lens information acquisition unit 101.

  Next, in S702, the zoom information calculation unit 104 converts the current optical zoom magnification into current angle of view information. The current angle of view information is information representing the angle of view at the current optical zoom magnification.

  As a method of calculating the current angle of view information, it may be calculated using a calculation formula prepared for each lens to calculate how much the angle of view becomes when the optical zoom is performed. For example, an optical calculation formula that converts the optical magnification to the angle of view can be used. Alternatively, the correspondence between the angle of view and the optical zoom magnification may be calculated in advance, and the result may be stored in the storage unit 330 as an information table. Then, current view angle information corresponding to the current optical zoom magnification can be obtained from the information table. Note that the current angle of view information here represents the imaging range as an angle, but is not limited to this as long as the imaging range can be represented. The following description will be made assuming that the current angle of view information indicates that the current angle of view is 63 degrees.

  Next, in S703, using the current angle of view information calculated in S702, the angle of view information 503 designated by the user is converted into angle of view information in a format represented by an angle.

  That is, the frame indicating the angle of view specified by the user is converted into an angle that represents the imaging range in the actual imaging unit 310. The current angle of view information calculated earlier is used for the conversion method. For example, when the current angle of view is 63 degrees, a case where the angle of view information 503 is designated will be described as an example. At this time, the ratio of the designated range to the entire current imaging range is calculated. For example, the ratio of vertical and horizontal lengths is calculated. For example, when the range indicated by the specified angle of view information 503 matches the current imaging range, the ratio is 100%, and the angle of view information 503 corresponding to the same angle of view as the current angle of view is specified. Become.

  If the ratio of the designated range to the current imaging range is 30%, the angle of view also needs to be 30%. That is, when the current field angle information indicates 63 degrees, the field angle corresponding to the designated field angle information 503 is 18.9 degrees. However, this calculation is an example in which the calculation is performed without considering the distortion of the lens. Since the lens has distortion characteristics for each lens, a calculation method used for angle of view conversion suitable for each lens may be used. Thus, the angle of view corresponding to the angle of view information 503 set by the user can be calculated. Here, the following description is given assuming that the calculated ratio is 68.254% and the angle of view corresponding to it is 43 degrees.

  Next, in S704, the zoom information calculation unit 104 converts the angle of view (43 degrees) calculated in S703 into zoom information (optical zoom magnification). For example, the optical zoom magnification can be converted using the method used when converting the current optical zoom magnification into the current angle of view information in S702.

  As described above, the zoom information is calculated from the angle of view information specified by the user. The zoom information may be a value indicating the optical zoom magnification itself or a value corresponding to the optical zoom magnification.

  Next, returning to the explanation of FIG. 3, in S304, the zoom information presentation unit 105 presents the zoom information calculated in S704 to the user. An example of the presentation method will be described with reference to FIGS. In FIGS. 8 to 10, zoom information is presented together with the currently captured image. The presentation methods of FIGS. 8-10 may be combined.

  In FIG. 8, the zoom information 800 is presented as a focal length of 138.5 mm. That is, by setting the focal length of the interchangeable lens 110 to 138.5 mm, the user can achieve a desired angle of view.

  In addition, interchangeable lenses are often structured to expand and contract in accordance with the zoom magnification. Therefore, the length of the interchangeable lens corresponding to the calculated zoom information may be presented.

  In FIG. 9, zoom information 900 is presented as a lens length of 27 cm (902 in FIG. 9) for realizing a desired zoom magnification. The user can set the desired angle of view by setting the length of the interchangeable lens 110 to 27 cm.

  Further, in FIG. 9, an image 901 showing an interchangeable lens when the lens length is 27 cm is also displayed. The lens length in the image 901 may be changed according to the zoom information. By presenting lens information in this manner, the user can visually recognize the lens length. In addition, when changing the zoom magnification, it can be known how long the lens will actually be adjusted to obtain the desired optical zoom magnification. This image 901 may be computer graphic or an image using a picture of an actual imaging device.

  Further, in FIG. 10, a zoom information save button 1000 for saving the zoom information is displayed together with the zoom information.

  When the user changes the zoom magnification to a place where the imaging device is installed, there is a possibility that the user may forget how much the zoom magnification should be shifted at the site. In order to prevent such a situation from occurring, for example, as shown in FIG. 10, a zoom information storage button 1000 may be provided. When the user selects the zoom information storage button 1000, the control unit 320 stores the zoom information in the storage unit 330. Then, when the user goes to the installation location of the imaging apparatus and changes the optical zoom magnification of the interchangeable lens, the user is asked whether the actual optical zoom magnification is set to the optical zoom magnification based on the stored lens information. Notice. As a means to notify, for example, a method of outputting a sound when the desired optical zoom magnification is within a predetermined range, a method of lighting an LED or the like can be used. As described above, when the zoom magnification of the interchangeable lens is changed, the zoom magnification is compared with the zoom information corresponding to the designated angle of view, and a predetermined notification is given according to the comparison result. The above is the method of presenting zoom information.

  When the imaging apparatus main body 100 has a display unit, the zoom information and zoom information storage button shown in FIGS. 8 to 10 may be displayed on the display unit according to the control of the control unit 320. . Further, zoom information or an image including zoom information may be transmitted from the communication unit 350 of the imaging apparatus main body 100 to the communication unit 351 of the client apparatus. In that case, the zoom information 800 and 900 may be displayed on the display device 150 under the control of the control unit 321. The zoom information may be stored in the storage unit 331. Thus, the control unit 321 also functions as a display control unit.

  When the zoom information storage button 1000 is displayed on the display device 150, the following procedure may be performed. That is, when the zoom information storage button 1000 is selected, the control unit 321 causes the communication unit 351 to transmit a command for storing zoom information to the imaging apparatus main body 100. When the imaging device body 100 receives the command, the imaging device body 100 stores the zoom information in the storage unit 330. The subsequent operation is similar to the operation described with reference to FIG.

  As described above, it is possible to make the user recognize how to adjust the interchangeable lens 110 in order to actually set the optical zoom magnification desired by the user by presenting the zoom information. Therefore, when changing the zoom magnification of the optical lens, the user can more easily change the zoom magnification to a desired zoom magnification.

Second Embodiment
Next, a second embodiment will be described using FIGS. 11 and 12. In addition, about the part similar to 1st Embodiment, description is abbreviate | omitted suitably.

  Depending on the angle of view specified by the user, it may be necessary to change not only the optical zoom magnification but also the installation angle (imaging direction) of the imaging apparatus main body 100. That is, when the center of the range designated by the user is deviated from the center of the range currently being captured, it is also necessary to change the imaging direction in which the imaging device captures an image. The second embodiment is an embodiment for adjusting the imaging direction.

FIG. 11 is different from the first embodiment in S1103. In S1103, the zoom information calculation unit 104 calculates imaging direction information indicating the movement amount of the imaging direction for realizing the imaging range desired by the user. Specifically, the zoom information calculation unit 104 calculates in S703. When the zoom magnification is changed, the center of the range indicated by the user's designated angle of view information 1101 is calculated.

  Then, the center of the imaging range when changing to the zoom magnification calculated in S703 is calculated. Here, the center of the imaging range when the zoom magnification is changed without changing the imaging direction is calculated.

  Then, a shift amount (distance) between the center of the range indicated by the field angle information 1101 designated by the user and the center of the imaging range when changing to the zoom magnification calculated in S703 is calculated. Then, the shift amount is converted into a shift (angle) in the imaging direction. For example, if the angle of view in the horizontal direction of the image is 100 degrees, and the amount of deviation is shifted downward by 10% of the angle of view in the horizontal direction, an instruction to move the imaging direction upward by 10 degrees is instructed. Information should be presented. This information may be presented to the user along with the zoom information, as shown at 1200 in FIG.

  As described above, when the imaging direction is changed to the imaging range desired by the user, the user can more easily change the imaging direction.

Third Embodiment
Next, a third embodiment will be described using FIG. In addition, about the part similar to other embodiment, description is abbreviate | omitted suitably.

  FIG. 13 is a diagram in which the client apparatus 140 is configured to have a function as an information processing apparatus. In the first embodiment, the control unit 320 of the imaging apparatus main body 100 includes the optical zoom magnification detection unit 102, the angle of view reception unit 103, the zoom information calculation unit 104, and the zoom information presentation unit 105. FIG. 13 is a diagram in which the control unit 321a of the client apparatus has these configurations.

  In this case, the lens information acquired by the lens information acquisition unit 101 is transmitted from the communication unit 350 to the client device 140a according to the control of the control unit 320a, and is received by the communication unit 351. And each part of the client apparatus 140a performs the process similar to 1st Embodiment based on the received lens information.

  Thus, the function of the information processing apparatus may be outside the imaging apparatus main body 100a.

(Other embodiments)
Next, a hardware configuration for realizing each function of each embodiment will be described with reference to FIG. Each configuration of the information processing apparatus other than the lens and the mechanism portion can be realized by the hardware configuration shown in FIG.

  A random access memory (RAM) 451 temporarily stores a computer program to be executed by a central processing unit (CPU) 450. In addition, the RAM 451 temporarily stores data (command and image data) and the like acquired from the outside via the communication interface 453. The RAM 451 also provides a work area used when the CPU 450 executes various processes. The RAM 451 also functions as, for example, a frame memory or a buffer memory.

  The CPU 450 executes a computer program stored in the RAM 451. A processor such as a DSP (Digital Signal Processor) or an application specific integrated circuit (ASIC) may be used other than the CPU.

  A hard disk drive (HDD) 452 stores an operating system program and image data.

  Computer programs and data stored in the HDD 452 are appropriately loaded into the RAM 452 and executed by the CPU 221 according to control of the CPU 450. Other storage media such as flash memory may be used besides the HDD. A bus 454 connects each piece of hardware. Each hardware exchanges data via the bus 454. The above is the hardware configuration in each embodiment.

  The present invention can also be realized by a process in which one or more processors read and execute a program for realizing one or more functions of the above-described embodiment. The program may be supplied to a system or apparatus having a processor via a network or a storage medium. The invention can also be realized by means of a circuit (eg an ASIC) that implements one or more of the functions of the embodiments described above.

  Further, each unit of the information processing apparatus may be realized by hardware shown in FIG. 14 or may be realized by software.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. For example, combinations of the respective embodiments are also included in the disclosure content of the present specification.

Reference Signs List 100 imaging apparatus main body 101 lens information acquisition unit 102 optical zoom magnification detection unit 103 view angle reception unit 104 zoom information calculation unit 105 zoom information presentation unit 110 interchangeable lens 120 lens mount unit 140 client device 150 display device 320, 321 control unit 310 Imaging unit

Claims (11)

A lens information acquisition unit that is capable of optically changing the zoom magnification and acquires lens information related to the lens used in the imaging apparatus;
Angle-of-view acquisition means for acquiring angle-of-view information specifying an angle of view of an image captured by the imaging device;
Calculating means for calculating zoom information related to the zoom magnification of the lens for setting the angle of view specified by the angle of view information, based on the lens information and the angle of view information;
An information processing apparatus comprising: display control means for displaying on a display means the zoom information calculated by the calculation means. The imaging device can be mounted with an interchangeable lens,
The information processing apparatus according to claim 1, wherein the lens information acquisition unit acquires the lens information from the interchangeable lens attached to the imaging device. The lens information acquisition means acquires the lens information when the power of the imaging device is turned on or when the interchangeable lens is mounted on the imaging device. 2. The information processing apparatus according to 2. When the zoom magnification of the interchangeable lens is changed, the zoom magnification is compared with the zoom information, and a notification means is provided which performs a predetermined notification according to the comparison result. The information processing apparatus according to 2 or 3. 5. The zoom information calculation means acquires a current optical zoom magnification based on the lens information, and calculates the zoom information based on the current optical zoom magnification. An information processing apparatus according to item 1. The field angle acquisition means acquires field angle information specified by performing an electronic zoom process on an image captured by the imaging device. Information processor as described. The information processing apparatus according to any one of claims 1 to 6, wherein the angle-of-view acquiring unit acquires angle-of-view information based on a frame specified for an image captured by the imaging device. apparatus. The information processing apparatus according to any one of claims 1 to 7, wherein the zoom information is at least one of a zoom magnification, a focal length, and a length of a lens. The calculation means further calculates the amount of movement in the imaging direction to obtain an angle of view specified by the angle of view information;
The information processing apparatus according to any one of claims 1 to 8, wherein the display control means further causes the display means to display information indicating the movement amount. A lens information acquisition step for acquiring lens information on a lens which is optically changeable in zoom magnification and is used in the imaging apparatus;
An angle-of-view acquisition step of acquiring angle-of-view information specifying an angle of view of an image captured by the imaging device;
Calculating, based on the lens information and the angle-of-view information, zoom information relating to the zoom magnification of the lens for setting the angle of view specified by the angle-of-view information;
A display control step of causing the display means to display the zoom information calculated in the calculation step.   A program which causes a computer to function as each means of the information processing apparatus according to any one of claims 1 to 9.

Images