TWI668988B - Interphone system, interphone master unit, interphone slave unit and program - Google Patents

Abstract

An object of the present invention is to reduce image distortion and reduce visual sensation. The walkie-talkie system (10) of the present invention includes an image correcting unit (23) that performs distortion correction processing for correcting distortion of an image captured by the imaging unit (21) of the interphone unit (2). The image correcting unit (23) divides the region to be subjected to the distortion correction target into a plurality of regions in the distortion correction processing, and performs distortion correction for each of the plurality of regions.

Description

Walkie-talkie system, walkie-talkie machine, intercom machine, and program

The present invention relates to a walkie-talkie system, a walkie-talkie machine, a walkie-talkie machine, and a program. More specifically, it relates to a walkie-talkie system having an image capture function, a walkie-talkie machine, a walkie-talkie machine, and a program.

In the past, a walkie-talkie system (television walkie-talkie) using a wide-angle lens for expanding the field of view of the camera has been provided (for example, refer to Patent Document 1). The walkie-talkie system described in Patent Document 1 includes a walkie-talkie handset (sub-device) and a walkie-talkie master (master) connected to the walkie-talkie handset via a signal transmission system. The intercom has a camera unit (television camera) mounted with a wide-angle lens, and a microphone that collects the sound of the visitor. The walkie-talkie master has a display unit (monitor television) that displays an image from the walkie-talkie handset, a speaker that outputs sound from the walkie-talkie handset, and an image correction unit (image distortion correction mechanism) that corrects image distortion. In the walkie-talkie system described in Patent Document 1, the image correcting unit corrects image distortion caused by the use of the wide-angle lens, and the corrected image is reflected on the display unit, whereby an image with less distortion can be obtained. However, in the walkie-talkie system described in Patent Document 1, since the same distortion correction is performed for all the images from the walkie-talkie handset, there is a possibility that the display unit displays an image that visually causes a sense of discomfort. [Prior Art Document] [Patent Document] [Patent Document 1] Japanese Patent Laid-Open No. Hei 6-225312

The present invention has been made in view of the above problems, and an object thereof is to provide a walkie-talkie system, a walkie-talkie machine, a walkie-talkie machine, and a program that can reduce image distortion and reduce visual discomfort. The walkie-talkie system of one aspect of the present invention is configured as a walkie-talkie system in which a walkie-talkie master and a walkie-talkie slave can communicate with each other. The walkie-talkie system includes an image correcting unit that performs distortion correction processing for correcting distortion of an image captured by an imaging unit of the walkie-talkie handset. The image correcting unit is configured to divide the region to be subjected to the distortion correction target into a plurality of regions in the distortion correction processing, and perform distortion correction different from each other for each of the plurality of regions. The walkie-talkie master of one aspect of the present invention is used in the walkie-talkie system described above. A sub-machine of one aspect of the present invention is used in the walkie-talkie system described above. A program according to an aspect of the present invention causes a computer to function as the image processing unit in the walkie-talkie system.

the following, An embodiment of the present invention will be described. The following embodiments are merely one of the various embodiments of the present invention. also, The following embodiments are intended to achieve the object of the present invention. Various changes can be made according to the design and the like.  The walkie-talkie system 10 of this embodiment is shown in FIG. The walkie-talkie machine 1 and the walkie-talkie machine 2 are provided. In this embodiment, The walkie-talkie system 10 will be described by taking an example of a walkie-talkie system for a home. another, In the following description, Not specifically distinguishing visitors 100A, In the case of 100B, Future visitors 100A, Each of 100B is referred to as "Visitor 100."  The walkie-talkie master 1 is installed in the indoor parent machine of the household (indoor) of the collective house. The walkie-talkie machine 2 is installed in the hall intercom of the public space (hall) of the collective house. The walkie-talkie master 1 and the walkie-talkie 2 are configured to communicate with each other. With this, In the walkie-talkie system 10, A call can be made between the walkie-talkie master 1 and the walkie-talkie handset 2. also, The interphone 2 is provided with an imaging unit 21, A display unit 12 is provided in the intercom base unit 1. With this, In the walkie-talkie system 10, An image of a visitor or the like photographed by the imaging unit 21 of the interphone unit 2 can be displayed on the display unit 12 of the intercom unit 1 .  Interphone 2 is shown in Figure 1. Having an imaging unit 21, Slave communication unit 22, Image correction unit 23, The slave control unit 24, The operation unit 25 and the storage unit 26.  The imaging unit 21 includes: Imaging element 211, Shooting a specific area; Lens 212, It is tiltable with respect to the imaging element 211. The imaging unit 21 is a camera for capturing a subject such as a visitor. therefore, In order to allow the visitor to operate the walkie-talkie handset 2, at least the face of the visitor is reflected in the image, Therefore, the imaging area (field of view) of the imaging unit 21 is set to be the front of the intercom 2 machine. In this embodiment, The imaging unit 21 is assumed to be a camera that captures a moving image. However, the imaging unit 21 may be a camera (still camera) that captures still images. also, In this embodiment, The imaging unit 21 is assumed to be a color camera that captures a color image. However, the imaging unit 21 may also be a monochrome camera that captures black and white images. Here, In this embodiment, The public space of the collective residence is a specific area. of course, The specific area is not limited to the public space of the collective residence. For example, when the intercom 2 is installed outside the occupants of the collective residence, The porch of each household is a specific area.  The imaging element 211 is, for example, a CCD (Charge Coupled Devices: Charge coupled device) image sensor, Or CMOS (Complementary Metal-Oxide Semiconductor: A complementary metal oxide film semiconductor) two-dimensional image sensor such as an image sensor. The imaging unit 21 images the light from the subject on the imaging surface (light receiving surface) of the imaging element 211 by the lens 212. The light from the subject is converted into an electrical signal (image signal) by the imaging element 211. therefore, The image captured by the imaging unit 21 is output from the imaging unit 21 as an image signal. Here, The imaging unit 21 is configured to generate an image signal of a digital position in the YUV format from an output signal of the imaging element 211. And output the digital image signal. The lens 212 is, for example, a fisheye lens (super wide-angle lens) having an angle of drawing of 180 degrees or more. Further, it is configured to be rotatable (tiltable) with respect to the image pickup element 211 in a plane orthogonal to the left-right direction (the direction perpendicular to the paper surface of FIG. 2). therefore, The optical axis P1 (see FIG. 2) of the imaging unit 21 including the imaging element 211 and the lens 212 changes in accordance with the tilt angle α1 (see FIG. 7) of the lens 212.  The slave communication unit 22 is a communication interface for communicating with the walkie-talkie master 1. The slave communication unit 22 includes, for example, a 2-line transmission path 4 including a twisted pair (indicated by one line in FIG. 1). It is electrically connected to the radio 1 of the intercom. The slave communication unit 22 includes a transmitting unit 221. The transmitting unit 221 transmits an image signal of an image captured by the imaging unit 21 to the intercom base unit 1. and then, The slave communication unit 22 is configured to be capable of two-way communication with the walkie-talkie master 1 . The audio signal and the control signal can be transmitted bidirectionally between the walkie-talkie handset 2 and the walkie-talkie master 1.  The image correcting unit 23 is configured to perform distortion correction processing for correcting image distortion with respect to the image signal output from the imaging unit 21. The image (image signal) output from the image correcting unit 23 is input to the slave communication unit 22. therefore, The transmitting unit 221 transmits an image signal corrected by the image correcting unit 23 to the walkie-talkie machine 1 . Rather than the image signal of the state output from the imaging unit 21. The image correcting unit 23 is, for example, a DSP (Digital Signal Processor: Digital Signal Processor) or FPGA (Field-Programmable Gate Array: Field programmable gate arrays, etc. are implemented. another, The distortion correction processing by the image correcting unit 23 will be described later.  The operation unit 25 accepts an operation from a visitor for calling. When a specific operation (for example, a pressing operation) is performed on the operation unit, The walkie-talkie machine 2 transmits a control signal (call signal) for calling the occupant in the home from the slave communication unit 22 to the walkie-talkie master 1. also, The operation unit 25 is configured to input an inclination angle α1 of the lens 212 with respect to the imaging element 211. And the inclination angle θ2 of the mounting surface 31 of the mounting table 3 (refer to FIG. 2) of the interphone 2 is mounted. The inclination angle α1 Θ2 is input by the constructor during construction of the walkie-talkie system 10.  The memory unit 26 is a memory for rewritable data. Preferred is a non-volatile memory. The memory unit 26 is configured to record an image captured by the imaging unit 21. also, In the memory unit 26, A plurality of distortion correction patterns for the image captured by the imaging unit 21 are recorded in advance. In this embodiment, The first distortion correction pattern is recorded in advance in the memory unit 26, Second distortion correction pattern, And a third distortion correction pattern, As a plurality of distortion correction patterns. In the first distortion correction pattern, Distortion correction is performed in the left and right direction (horizontal direction) of the image. In the second distortion correction pattern, Distortion correction is performed in the left and right direction and the vertical direction (vertical direction) of the image. In the third distortion correction pattern, The distortion correction is performed in the left-right direction and the vertical direction of the image with a correction intensity different from the second distortion correction pattern. Here, The correction strength refers to the degree of extension of at least one of the horizontal direction and the vertical direction. E.g, When the correction intensity in the horizontal direction is strong, Will extend significantly in the horizontal direction.  The slave control unit 24 controls each component of the walkie-talkie handset 2. The slave control unit 24 is, for example, a CPU (Central Processing Unit: The central processing unit) and the memory are mainly composed of a microcomputer. And by executing the program stored in the memory by the CPU, The microcomputer functions as the slave control unit 24. The program executed by the CPU is pre-recorded here in the memory of the microcomputer. However, it can also be recorded on a non-transitory recording medium such as a memory card. Or it can be provided through an electrical communication line.  The walkie-talkie handset 2 is shown in Figure 2. Furthermore, it has a housing 20. The casing 20 is formed in a rectangular box shape having a thin thickness. Inside the housing 20, Each component of the interphone unit 2 including the imaging unit 21 and the transmission unit 221 is housed.  The walkie-talkie machine 1 is shown in Figure 1. With a parent machine communication unit 11, Display unit 12, The parent machine control unit 13, Image processing unit 14, And the operation unit 15.  The parent machine communication unit 11 is a communication interface for communicating with the walkie-talkie handset 2. The base unit communication unit 11 is electrically connected to the child communication unit 22 of the walkie-talkie unit 2 via the transmission path 4. The parent machine communication unit 11 includes a receiving unit 111. The receiving unit 111 receives an image signal transmitted from the transmitting unit 221 of the interphone unit 2. and then, The parent machine communication unit 11 is configured to be capable of bidirectional communication with the walkie-talkie handset 2 (slave communication unit 22). The sound signal and the control signal can be transmitted bidirectionally with the walkie-talkie master 1.  The display unit 12 displays an image based on the image signal. The display unit 12 is, for example, a liquid crystal display. also, When the walkie-talkie machine 1 has a touch panel, The touch panel display also serves as the display unit 12 and the operation unit 15.  The image processing unit 14 receives the image signal output from the receiving unit 111, Perform image processing. An image (image signal) output from the image processing unit 14 is input to the display unit 12. therefore, The display unit 12 displays an image based on an image signal subjected to image processing by the image processing unit 14, Rather than an image based on the image signal of the state received by the receiving unit 111. The image processing unit 14 is realized by, for example, a DSP, an FPGA, or the like.  The operation unit 15 accepts the operation of the occupant in the household. In a state where the base unit communication unit 11 receives a control signal (call signal) for calling the occupant from the walkie-talkie handset 2, When a specific operation (for example, a pressing operation) is performed on the operation unit 15, The walkie-talkie master 1 and the walkie-talkie 2 become talkable.  The parent machine control unit 13 controls each component of the walkie-talkie machine 1. The parent machine control unit 13 is constituted by, for example, a microcomputer mainly composed of a CPU and a memory. By executing the program stored in the memory by the CPU, The microcomputer functions as the parent machine control unit 13. The program executed by the CPU is pre-recorded here in the memory of the microcomputer. However, it can also be recorded on a non-transitory recording medium such as a memory card. Or it can be provided through an electrical communication line.  Fig. 2 is a schematic view showing an example of installation of the interphone unit 2 of the embodiment. In the public space 5 of the collection house, as shown in picture 2, A mounting table 3 having a rectangular parallelepiped shape formed in a vertical direction (vertical direction) is provided. The mounting table 3 has a mounting surface 31 for mounting the interphone unit 2. The mounting surface 31 is as shown in FIG. 2 Tilting relative to the horizontal plane parallel to the ground, Its inclination angle is θ2. therefore, When the interphone 2 is mounted on the mounting surface 31 of the mounting table 3, The interphone 2 (housing 20) is also inclined at an inclination angle θ2 with respect to the above horizontal plane.  When the interphone 2 is mounted on the mounting table 3, The central axis P2 of the imaging element 211 is parallel to the normal direction of the mounting surface 31. also, In this embodiment, The direction including the imaging element 211 and the optical axis P1 of the imaging unit 21 of the lens 212 is horizontal. The lens 212 is rotated clockwise with respect to the image pickup element 211 in a plane orthogonal to the left-right direction (the direction perpendicular to the paper surface of FIG. 2). therefore, In this embodiment, The optical axis P1 of the imaging unit 21 does not coincide with the central axis P2 of the imaging element 211.  also, In this embodiment, Since the lens 212 is a fisheye lens, Therefore, the viewing angle of the imaging unit 21 in the plane orthogonal to the left-right direction is θ1 (see FIG. 2). Here, Since the lens 212 is tilted (rotated) such that the direction of the optical axis P1 of the imaging unit 21 is horizontal, Therefore, a part of the casing 20 of the intercom 2 is included in the imaging area of the imaging unit 21, The viewing angle θ1 of the imaging unit 21 is set.  3A and 3B are schematic views of an image 121 displayed on the display unit 12 of the intercom master 1 of Comparative Example 1. In this embodiment, As mentioned above, The lens 212 of the imaging unit 21 is a fisheye lens. therefore, In the image 121 captured by the imaging unit 21, As shown in Figure 3A, Produce a distortion like the center of the center, That is, the distortion of the barrel shape.  Visitor 100A is shown in Figure 3A. Since it is located in the center of the image 121, Therefore, the distortion is less. on the other hand, The visitor 100B is located on the left side of the image 121, Therefore, it bends outward (to the left). After the visitor 100A, There are two pieces of door 200A, 200B automatic door 200. In 2 doors 200A, Among the 200B, The boundary line 201 on the upper side, 201 is bent outward (upward). also, The boundary line 202 on the left side of the door piece 200A on one side (the left side in FIG. 3A) and the boundary line 202 on the right side of the door piece 200B on the other side, Also bend outward (left or right). and then, In the example shown in FIG. 3A, A portion of the housing 20 of the walkie-talkie handset 2 is reflected in the lower portion of the image 121.  When the image correcting unit 23 performs distortion correction in the horizontal direction (the horizontal direction of the image 121) with respect to the image 121 (refer to the arrow mark of FIG. 3A), As shown in Figure 3B, The distortion of the image 121 is corrected. Here, The distortion correction in the horizontal direction refers to a method of reducing distortion of a line extending in the vertical direction (up and down direction) in the image 121, Correction in the horizontal direction. In this case, The distortion of the visitor 100B located on the left side of the image 121 is reduced, And 2 door pieces 200A, The distortion of the boundary line 202 on the left or right side of each of the 200B is reduced. another, In this case, 2 door panels 200A, The distortion of the boundary line 201 on the upper side of 200B still exists. And the reflection of the housing 20 is also maintained unchanged.  4A and 4B are schematic views of an image 121 displayed on the display unit 12 of the walkie-talkie machine 1 of Comparative Example 2. another, 4A is the same as FIG. 3A described above. Description is omitted here for FIG. 4A.  When the image correcting unit 23 performs distortion correction (two-dimensional directional distortion correction) in the horizontal direction (the horizontal direction of the image 121) and the vertical direction (the upper and lower directions of the image 121) with respect to the image 121 (refer to FIG. 4A) arrow), As shown in Figure 4B, The distortion of the image 121 is corrected. Here, The two-dimensional directional distortion correction refers to a method of reducing distortion of a line extending in the vertical direction and the horizontal direction in the image 121, Correction in the vertical and horizontal directions. In this case, 2 door panels 200A, The distortion of the boundary line 201 on the upper side of each of 200B and the boundary line 202 on the left or right side is reduced, And the reflection of the casing 20 of the intercom 2 is disappeared. but, In this case, For the visitor 100B located to the left of the image 121, Although the distortion in the horizontal direction is reduced, However, due to the distortion correction in the vertical direction, the vertical direction is extended. the result, The proximity of the automatic door 200 after the visitor 100B and the visitor 100B becomes exaggerated. And become an unnatural image.  As mentioned above, Performing distortion correction only on the horizontal direction of the entire image 121, Or when the distortion correction (two-dimensional direction distortion correction) is performed in the horizontal direction and the vertical direction, A portion of the housing 20 of the intercom 2 will be reflected in the image 121. It leads to an unnatural image. which is, When the same distortion correction is performed on the entire image 121, It may not be possible to balance the reduction in image distortion with the reduction in visual dissonance.  therefore, The image correcting unit 23 of the present embodiment is as shown in FIGS. 5A and 5B. The image 121 is divided into a plurality of (two in the illustrated example) regions (the first region 1211 and the second region 1212). Distortion corrections are made for each of a plurality of regions. 5A and 5B, The distortion correction processing by the image correcting unit 23 of the present embodiment will be specifically described.  FIG. 5A is a schematic view of an image 121 captured by the imaging unit 21, similarly to FIG. 3A and FIG. 4A described above. The image correcting unit 23 of the present embodiment is as shown in FIG. 5A. The area of the image 121 is divided into two (2 divisions) in the vertical direction by the center line L1 of the upper and lower directions of the image 121. The area on the upper side (one side) of the center line L1 is the first area 1211, The area on the lower side (the other side) of the center line L1 is the second area 1212. In this embodiment, The center line L1 is set to intersect with the central axis P2 (see FIG. 2) of the imaging element 211 of the imaging unit 21.  The image correcting unit 23 is as shown in FIG. 5A. The first distortion correction pattern recorded in the memory unit 26 in advance, Among the second distortion correction pattern and the third distortion correction pattern, Select the first distortion correction pattern, The first region 1211 is subjected to distortion correction. which is, The image correcting unit 23 corrects the first distortion correction in the horizontal direction (the horizontal direction of the image 121) in the first region 1211. With this, In the first area 1211, The distortion of the visitor 100B located on the left side of the image 121 is reduced, And 2 door pieces 200A, The distortion of the boundary line 202 on the left and right sides of each of 200B is reduced (refer to FIG. 5B). On the other hand, 2 door panels 200A, The boundary line 201 on the upper side of 200B is left with distortion.  The image correcting unit 23 selects the second distortion correction pattern for the second region 1212. which is, The image correcting unit 23 for the second region 1212, The second distortion correction for correcting the distortion in the horizontal direction and the vertical direction (the upper and lower directions of the image 121) is performed. With this, In the second area 1212, The distortion of the visitor 100B is reduced, And 2 pieces of door piece 200A, The distortion of the boundary line 202 on the left or right side of each of the 200B is reduced. and then, For the second area 1212, By also correcting the distortion in the vertical direction, The reflection of the casing 20 also disappears (refer to Fig. 5B).  As mentioned above, By dividing the area of the image 121 into the first area 1211 and the second area 1212, Performing the first distortion correction on the first region 1211, Performing the second distortion correction on the second region 1212, Both the reduction of image distortion and the reduction of visual distraction can be considered.  And in the above embodiment, The image correcting unit 23 divides the region of the image 121 into two regions (the first region 1211 and the second region 1212). However, the number of divisions of the image 121 is not limited to two. The intercom machine 2 of the present embodiment is as described above. Installed due to tilting relative to the horizontal plane parallel to the ground, Therefore, the visitor 100A in the image 121, The position of the 100B and the automatic door 200 varies depending on the inclination angle θ2 of the mounting surface 31. therefore, The image correcting unit 23 is preferably configured to change the number of divisions of the image 121 in accordance with the tilt angle θ2 of the mounting surface 31. another, The inclination angle θ2 of the mounting surface 31 can be input via the above-described operation unit 25. the following, The first modification of the embodiment will be specifically described with reference to Figs. 6A to 6C.  The image correcting unit 23 is as shown in FIG. 6A. Divided into a plurality of (four in the illustrated example) regions according to the inclination angle θ2 of the mounting surface 31 (the first region 1211) Second area 1212 The third area 1213 and the fourth area 1214), Distortion corrections are made for each of a plurality of regions. another, PL1 in Figure 6A PL2 PL3 is a dividing line.  E.g, When the inclination angle θ2 of the mounting surface 31 is 30 degrees, The image correcting unit 23 is as shown in FIG. 6B. By two dividing lines PL1 PL2 divides image 121 into first area 1211. The second area 1212 and the third area 1213. In this case, The image correcting unit pairs the first region 1211 which is assumed to contain the face of the visitor 100, The first distortion correction for correcting the distortion in the horizontal direction (the left and right direction of the image 121) is performed. also, The image correcting unit 23 pairs the second region 1212 between the first region 1211 and the third region 1213. The second distortion correction (two-dimensional direction distortion correction) for correcting the distortion in the horizontal direction and the vertical direction (the upper and lower directions of the image 121) is performed. and then, The image correcting unit 23 generates a third region 1213 into which the casing 20 of the walkie-talkie handset 2 is reflected. The third distortion correction for correcting distortion in the horizontal direction and the vertical direction is performed. at this time, The image correcting unit 23 is in the third distortion correction, In order to prevent the housing 20 from being reflected into the third area 1213, It is preferable to increase the correction intensity in the vertical direction to be higher than the second distortion correction.  also, When the inclination angle θ2 of the mounting surface 31 is 45 degrees, The image correcting unit 23 is as shown in FIG. 6C. The image 121 is divided into a first region 1211 and a second region 1212 by one dividing line PL1. In this case, The image correcting unit 23 refers to the first region 1211 which is assumed to include the face of the visitor 100. The first distortion correction for correcting the distortion in the horizontal direction is performed. also, The image correcting unit 23 pairs the second region 1212 in which the casing 20 of the intercom 2 is generated. The second distortion correction for correcting the distortion in the horizontal direction and the vertical direction is performed. Here, Since the inclination angle of the mounting surface 31 becomes larger, The amount of reflection of the housing 20 is reduced, Therefore, the image correcting unit 23 preferably reduces the correction intensity in the vertical direction to be lower than the inclination angle θ2 of the mounting surface 31 by 30 degrees.  As mentioned above, The number of divisions of the image 121 (the number of divisions of the plurality of regions) is changed by the inclination angle θ2 of the mounting surface 31, Distortion correction corresponding to the inclination angle θ2 of the mounting surface 31 can be performed.  According to the above-described variation 1, the number of divisions of the image 121 is changed according to the inclination angle θ2 of the mounting surface 31 on which the interphone unit 2 is mounted, However, the number of divisions of the image 121 may be changed, for example, according to the inclination angle α1 of the lens 212 with respect to the imaging element 211. the following, Referring to FIG. 6B, Figure 6C and Figure 7, The second modification of the embodiment will be specifically described.  Fig. 7 is a schematic view showing an example of installation of the interphone unit 2 according to the second modification of the embodiment. The intercom machine 2 is as described above, The lens 212 is configured to be tiltable with respect to the imaging element 211. When the central axis P2 (see FIG. 2) of the imaging element 211 coincides with the central axis of the lens 212, The optical axis P1 of the imaging unit 21 is P11. When the inclination angle α1 of the lens 212 with respect to the imaging element 211 is set to α11, The optical axis P1 of the imaging unit 21 is P12. also, When the inclination angle α1 of the lens 212 with respect to the imaging element 211 is set to α12 (α12>α11), The optical axis P1 of the imaging unit 21 is P13.  E.g, When the tilt angle α1 of the lens 212 is α11, The image correcting unit 23 is as shown in FIG. 6C. The image 121 is divided into a first region 1211 and a second region 1212 by one dividing line PL1. In this case, The image correcting unit 23 refers to the first region 1211 which is assumed to include the face of the visitor 100. The first distortion correction for correcting the distortion in the horizontal direction is performed. also, The image correcting unit 23 pairs the second region 1212 in which the casing 20 of the intercom 2 is generated. The second distortion correction for correcting the distortion in the horizontal direction and the vertical direction is performed.  also, When the tilt angle α1 of the imaging element 212 is α12 (α12>α11), The image correcting unit 23 is as shown in FIG. 6B. By 2 dividing lines PL1 The PL2 is divided into the first area 1211. The second area 1212 and the third area 1213. In this case, The image correcting unit 23 refers to the first region 1211 which is assumed to include the face of the visitor 100. Perform the first distortion correction that corrects only the distortion in the horizontal direction. also, The image correcting unit 23 pairs the second region 1212 between the first region 1211 and the third region 1213. The second distortion correction (two-dimensional direction distortion correction) for correcting distortion in the horizontal direction and the vertical direction is performed. and then, The image correcting unit 23 generates a third region 1213 into which the casing 20 of the walkie-talkie handset 2 is reflected. The third distortion correction for correcting distortion in the horizontal direction and the vertical direction is performed. at this time, The image correcting unit 23 is in the third distortion correction, In order to prevent the housing 20 from being reflected into the third area 1213, It is preferable to increase the correction intensity in the vertical direction to be higher than the second distortion correction.  As mentioned above, The number of divisions of the image 121 (the number of divisions of the plurality of regions) is changed according to the inclination angle α1 of the lens 212 with respect to the imaging element 211, Distortion correction corresponding to the tilt angle α1 of the lens 212 can be performed.  As in the above embodiments and variations 1, 2, When the image correcting unit 23 is mainly composed of a DSP or an FPGA, By program, The function of the image correcting unit 23 can be realized. which is, The program of this embodiment is a program for causing a computer to function as the image correcting unit 23 in the walkie-talkie system 10. According to the program, By causing the computer to function as the image correcting unit 23, The image distortion of the image 121 can be reduced, And reduce the visual sense of violation.  the following, Other variations of the embodiment will be described.  In the above embodiments and variations 1, 2, The case where the intercom machine 2 is a hall intercom is described as an example. However, the intercom machine 2 may be an access control telephone set installed in a household of each household. also, The walkie-talkie machine 1 is not limited to being installed in a residence of a collective house. For example, it may be a management room master machine installed in an administrator's room of a collective house.  also, In the above embodiments and variations 1, 2, The case where the walkie-talkie system 10 is applied to a collective house is described as an example. However, the application object of the walkie-talkie system 10 is not limited to the collective residence. It can also be a single-family home. In this case, The walkie-talkie machine 1 is an indoor parent machine installed in a house. The intercom machine 2 is a doorphone that is installed outside the house. also, The application object of the walkie-talkie system 10 is not limited to the residence. It can also be a non-residential building such as a building or a factory.  also, In the above embodiment and modification 1, 2, Taking the entire image 121 as the object of distortion correction, However, the object of the distortion correction may also be a part of the image 121. In this case, The image correcting unit 23 is configured to divide a part of the image 121 which is a target of distortion correction into a plurality of regions. It is only necessary to perform distortion correction for each of a plurality of regions.  and then, In the above embodiments and variations 1, 2, When the image 121 is divided into 2, the center line L1 is equally divided by 2, However, it may be divided into two by a dividing line different from the center line L1. which is, The area above the dividing line is the first area, The second region, which is the lower side of the dividing line, may be of a different size. also, The same applies to dividing the image 121 into three or more. Each area can be equally divided, It can also be divided unevenly.  also, In the above embodiment and modification 1, 2, In image 121, The area above the center line L1 is the first area 1211, The area on the lower side is the second area 1212, However, the first region 1211 and the second region 1212 may be reversed. which is, Can also be, The area above the center line L1 in the image 121 is the second area 1212, The area on the lower side is the first area 1211. According to this configuration, For example, when the optical axis P1 of the imaging unit 21 is set to face upward and a part of the upper side of the casing 20 is reflected in the image 121, The housing 20 can be prevented from being reflected in the image 121.  and then, In the above variation 1, 2,  It is configured such that the constructor inputs the inclination angle θ2 of the mounting surface 31 and the inclination angle α1 of the lens 212 during construction. In contrast, It is also possible to automatically input the inclination angle α1 of the lens 212 by, for example, a function of automatically tilting the lens 212. also, It is also possible to automatically measure the inclination angle θ2 of the mounting surface 31 when the interphone 2 is attached to the mounting table 3.  also, In the above embodiments and variations 1, 2, The walkie-talkie system 10 including the walkie-talkie machine 1 and the walkie-talkie machine 2 has been described as an example. However, the above configuration can also be applied to, for example, an anti-theft camera or a car camera.  and then, In the above embodiment and modification 1, 2, The case where the interphone 2 has the image correcting unit 23 will be described as an example. However, the intercom base unit 1 may have an image correcting unit.  also, In the above embodiments and variations 1, 2, The case where the walkie-talkie machine 1 has the display unit 12 has been described as an example. In contrast, The display unit can be provided for both the indoor handset and the walkie-talkie base unit 1 installed in the household. It can also be a general-purpose mobile information terminal such as a smart phone or tablet terminal (PDA: Personal Digital Assistant, The personal digital assistant has a display unit.  also, In the above embodiments and variations 1, 2, The case where the lens 212 is tiltable with respect to the imaging element 211 is described as an example. However, the imaging element 211 and the lens 212 may be integrally rotated. In this case, The image correcting unit 23 is preferably configured to perform distortion correction processing. The number of divisions of the plurality of regions is changed in accordance with the inclination angles of the imaging element 211 and the lens 212. also, The image correcting unit 23 may be configured to perform distortion correction processing. According to the tilt angle of the imaging element 211 and the lens 212, Since the first distortion correction, Among the second distortion correction and the third distortion correction, distortion correction is performed for each of the plurality of regions. The first distortion correction is a correction for correcting distortion in the left and right direction of the image. The second distortion correction is a correction for correcting distortion in the up and down direction of the image in the left and right direction. The third distortion correction is distortion in the left-right direction and the vertical direction of the corrected intensity correction image different from the second distortion correction.  The embodiment described above is clear, The walkie-talkie system (10) of the first aspect is configured as a walkie-talkie system in which the walkie-talkie master (1) and the walkie-talkie slave (2) can communicate with each other. The walkie-talkie system (10) includes an image correcting unit (23) that corrects distortion correction processing of image distortion detected by the imaging unit (21) of the interphone unit (2). The image correcting unit (23) is configured to perform distortion correction processing. Dividing an area of the image that is a distortion correction target into a plurality of areas, Distortion corrections are made for each of a plurality of regions.  According to the first aspect, The image correcting unit (23) divides the region to be subjected to the distortion correction into a plurality of regions. Performing distortion corrections for each of a plurality of regions, Therefore, compared with the case where the same distortion correction is performed on the entire image, Reduce image distortion, And reduce the visual sense of violation.  The second aspect of the walkie-talkie system (10) is as in the first aspect, There is provided a corrected image obtained by displaying the image correcting unit (23), Or a display portion (12) of an image based on an image signal of the corrected image.  According to the second aspect, The image corrected by the image correcting unit (23) can be displayed on the display unit (12).  The walkie-talkie system (10) of the third aspect is like the first or second aspect, among them, The image correcting unit (23) is configured to be divided into a first region (1211) and a second region (1212). As a plurality of areas. The first area (1211) includes one of the areas in which the image (121) is divided into two in the up and down direction. The second area (1212) includes another area in which the image (121) is divided into two in the up and down direction.  According to the third aspect, By performing distortion correction on the first region (1211) and the second region (1212), Can reduce the number of images divided, And reduce image distortion and reduce visual dissonance. However, this configuration is not a necessary component of the walkie-talkie system (10). As a plurality of areas, For example, it may be divided into three or more regions.  The walkie-talkie system (10) in the fourth aspect is like the third aspect, among them, The first region (1211) and the second region (1212) refer to two regions equally divided by the center line (L1) 2 in the upper and lower directions of the image (121).  According to the fourth aspect, Since it is divided into two areas by the center line (L1) 2, Therefore, when photographing a person (visitor), The face of the visitor can be included in one of the areas. And, By performing distortion correction on only one of the areas including the face in the horizontal direction (the left and right direction of the image (121)), Can reduce the face of the visitor unnaturally deformed. However, whether or not to adopt this configuration is arbitrary.  The fifth aspect of the walkie-talkie system (10) is in the form of the third or fourth aspect, among them, The image correcting unit (23) is configured to perform distortion correction processing. Performing the first distortion correction in the first area (1211), The second distortion correction is performed in the second region (1212). In the first distortion correction, Correct the distortion of the left and right direction of the image (121). In the second distortion correction, Correct the distortion of the image (121) in the left and right direction and the up and down direction.  According to the fifth aspect, The housing (20) can be reduced in comparison with the case where the first distortion correction is performed on the entire image. Further, it is possible to reduce the unnatural deformation of the face of the person (visitor) as compared with the case where the second distortion correction is performed on the entire image. which is, According to the fourth aspect, Compared with the case where the same distortion correction is performed on the entire image, Reduce image distortion, And reduce the visual sense of violation. However, whether or not to adopt this configuration is arbitrary.  The walkie-talkie system (10) of the sixth aspect is like the first or second aspect, among them, The imaging unit (21) further includes a lens (212) that is tiltable with respect to the imaging element (211). The image correcting unit (23) is configured to perform distortion correction processing. According to the tilt angle (α1) of the lens (212), Change the number of divisions of a plurality of regions.  According to the sixth aspect, A distortion correction process corresponding to the tilt angle (α1) of the lens (212) can be performed. However, this configuration is not a necessary component of the walkie-talkie system (10). For example, regardless of the tilt angle (α1) of the lens (212), The number of divisions in a plurality of regions is constant.  The walkie-talkie system (10) of the seventh aspect is like the sixth aspect, among them, The image correcting unit (23) is in the distortion correcting process, According to the tilt angle (α1) of the lens (212), Since the first distortion correction, Second distortion correction, And the third distortion correction, Select the distortion correction you want to make for each of the multiple regions. In the first distortion correction, Correct the distortion of the left and right direction of the image (121). In the second distortion correction, Correct the distortion of the image (121) in the left and right direction and the up and down direction. In the third distortion correction, The distortion in the left-right direction and the vertical direction of the image (121) is corrected by the correction intensity different from the second distortion correction.  According to the seventh aspect, According to the tilt angle (α1) of the lens (212), Since the first distortion correction, Second distortion correction, And the third distortion correction selects distortion correction to be performed for each of the plurality of regions. However, whether or not to adopt this configuration is arbitrary.  The eighth aspect of the walkie-talkie system (10) is as in the first 2, 6 or 7 aspect, among them, The interphone (2) further includes a casing (20) that houses the imaging unit (21) and the transmission unit (221). The housing (20) is in such a manner that the central axis (P2) of the imaging element (211) is parallel to the normal direction of the mounting surface (31). The mounting surface (31) mounted on the mounting surface (31) is an inclined mounting table (3). The image correcting unit (23) is configured to perform distortion correction processing. According to the inclination angle (θ2) of the mounting surface (31), Change the number of divisions of a plurality of regions.  According to the eighth aspect, A distortion correction process corresponding to the tilt angle (θ2) of the mounting surface (31) can be performed. However, this configuration is not a necessary component of the walkie-talkie system (10). For example, regardless of the inclination angle (θ2) of the mounting surface (31), The number of divisions in a plurality of regions is constant.  The ninth aspect of the walkie-talkie system (10) is like the eighth aspect, among them, The image correcting unit (23) is in the distortion correcting process, According to the inclination angle (θ2) of the mounting surface (31), Since the first distortion correction, Second distortion correction, And the third distortion correction selects distortion correction to be performed for each of the plurality of regions. In the first distortion correction, Correct the distortion of the left and right direction of the image (121). In the second distortion correction, Correct the distortion of the image (121) in the left and right direction and the up and down direction. In the third distortion correction, The distortion in the left-right direction and the vertical direction of the image (121) is corrected by the correction intensity different from the second distortion correction.  According to the ninth aspect, According to the inclination angle (θ2) of the mounting surface (31), Since the first distortion correction, Second distortion correction, And the third distortion correction selects distortion correction to be performed for each of the plurality of regions. However, whether or not to adopt this configuration is arbitrary.  The walkie-talkie master (1) of the tenth aspect is used in the walkie-talkie system (10) of any of the first to ninth aspects.  According to the tenth aspect, By using the intercom (1), A walkie-talkie system (10) that reduces image distortion and reduces visual discomfort can be provided.  The interphone (2) of the (11) aspect is used in the walkie-talkie system (10) of any of the first to the ninth aspects.  According to the eleventh aspect, By using the intercom machine (2), A walkie-talkie system (10) that reduces image distortion and reduces visual discomfort can be provided.  The program of the twelfth aspect is such that the computer functions as the image correcting unit (23) in the walkie-talkie system (10) of any of the first to ninth aspects.  According to the twelfth aspect, By using a computer as an image correcting unit (23), Reduce image distortion, And reduce the visual sense of violation.

1‧‧‧Interphones

2‧‧‧Interphones

3‧‧‧Installation table

4‧‧‧Transfer path

5‧‧‧Common space for condominiums

10‧‧‧Intercom system

11‧‧‧Maternal Communication Department

12‧‧‧ Display Department

13‧‧‧Master Machine Control Department

14‧‧‧Image Processing Department

15‧‧‧Operation Department

20‧‧‧shell

21‧‧‧Photography Department

22‧‧‧Site Communication Department

23‧‧‧Image Correction Department

24‧‧‧Submachine Control Department

25‧‧‧Operation Department

26‧‧‧Memory Department

31‧‧‧Installation surface

100‧‧‧ Visitors

100A‧‧‧ Visitors

100B‧‧‧ Visitors

111‧‧‧ Receiving Department

121‧‧‧ Images

200‧‧‧Automatic door

200A‧‧‧doors

200B‧‧‧doors

201‧‧‧ boundary line

202‧‧‧ boundary line

211‧‧‧Photographic components

212‧‧‧ lens

221‧‧‧Send Department

1211‧‧‧1st area

1212‧‧‧2nd area

1213‧‧‧3rd area

1214‧‧‧4th area

L1‧‧‧ center line

P1‧‧‧ optical axis

P2‧‧‧ central axis

P11‧‧‧ Optical axis P1

P12‧‧‧ Optical axis P1

P13‧‧‧ Optical axis P1

PL1‧‧‧ dividing line

PL2‧‧‧ dividing line

PL3‧‧‧ dividing line

11‧‧‧ tilt angle

1111‧‧‧ tilt angle α1

1212‧‧‧ tilt angle α1

Θ1‧‧‧ viewing angle

Θ2‧‧‧ tilt angle

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram of a walkie-talkie system in accordance with an embodiment of the present invention. Fig. 2 is a schematic view showing an example of installation of a walkie-talkie sub-machine according to an embodiment of the present invention. Fig. 3A is a schematic view showing an image before distortion correction displayed on the display unit of the walkie-talkie main unit of Comparative Example 1. Fig. 3B is a schematic view showing an image after distortion correction displayed on the display unit of the same main unit. Fig. 4A is a schematic view showing an image before distortion correction displayed on the display unit of the walkie-talkie master of Comparative Example 2. Fig. 4B is a schematic view showing an image after distortion correction displayed on the display unit of the same main unit. Fig. 5A is a schematic view showing an image before distortion correction displayed on the display unit of the walkie-talkie machine of the embodiment. Fig. 5B is a schematic view showing an image after distortion correction displayed on the display unit of the intercom master. 6A to 6C are schematic diagrams showing an example of division of an image displayed on a display unit of a walkie-talkie master according to a first modification of the embodiment of the present invention. Fig. 7 is a schematic view showing an example of installation of a walkie-talkie sub-machine according to a second modification of the embodiment of the present invention.

Claims (16)

A walkie-talkie system configured as a walkie-talkie system in which a walkie-talkie master and a walkie-talkie slave can communicate with each other, and an image correcting unit that corrects distortion of an image captured by an image capturing unit of the walkie-talkie handset The image correcting unit is configured to divide, in the distortion correction processing, a region to be subjected to distortion correction in the image into at least a plurality of regions in a downward direction of the image, and to the plurality of regions In the two or more regions divided in the vertical direction, the distortion correction in which the intensity in the vertical direction is different is different. The interphone system of claim 1, further comprising a display unit that displays the corrected image obtained by the image correcting unit or an image based on the image signal of the corrected image. The interphone system of claim 1, wherein the image correcting unit is configured to be divided into a first region including one region of the image divided into two in the vertical direction, and a second region including the other region. Multiple areas. The interphone system of claim 2, wherein the image correcting unit is configured to be divided into a first region including one region of the image divided into two in the vertical direction, and a second region including the other region. Multiple districts area. The interphone system of claim 3, wherein the first area and the second area are two areas that are equally divided by two from a center line in the upper and lower directions of the image. The interphone system of claim 4, wherein the first area and the second area are two areas that are equally divided by two from a center line in the upper and lower directions of the image. The interphone system according to any one of claims 3 to 6, wherein the image correcting unit is configured to perform a first distortion correction for correcting distortion in a left-right direction of the image in the first region in the distortion correction processing. The second distortion correction for correcting distortion in the left-right direction and the vertical direction of the image is performed in the second region. The interphone system of claim 1, wherein the imaging unit further includes a lens that is tiltable with respect to the imaging element; and the image correction unit is configured to change the plurality of the plurality of lenses according to an inclination angle of the lens in the distortion correction processing The number of divisions of the area. The interphone system of claim 2, wherein the imaging unit further includes a lens that is tiltable with respect to the imaging element; and the image correction unit is configured to perform the distortion correction process according to the lens The number of divisions of the plurality of regions is changed by the tilt angle. The interphone system according to claim 8, wherein the image correcting unit is configured to correct the first distortion correction of the distortion in the left-right direction of the image and correct the map according to the tilt angle of the lens in the distortion correction processing. The second distortion correction of the distortion in the left-right direction and the vertical direction, and the third distortion correction in which the distortion in the left-right direction and the vertical direction of the image is corrected by the correction intensity different from the second distortion correction is selected. The distortion correction is performed by each of the plurality of regions. The interphone system of claim 9, wherein the image correcting unit is configured to correct the first distortion correction and correct the distortion in the left-right direction of the image based on the tilt angle of the lens in the distortion correction processing. The second distortion correction of the distortion in the left-right direction and the vertical direction, and the third distortion correction in which the distortion in the left-right direction and the vertical direction of the image is corrected by the correction intensity different from the second distortion correction is selected. The distortion correction is performed by each of the plurality of regions. The walkie-talkie system of claim 1, 2, 8, 9, 10 or 11, wherein the walkie-talkie handset further has a housing for housing the imaging unit; the housing is parallel to a central axis of the imaging element and a normal direction of the mounting surface In the above-described manner, the image correcting unit is configured to change the number of divisions of the plurality of regions in accordance with the inclination angle of the mounting surface in the distortion correction processing. The interphone system of claim 12, wherein the image correcting unit is configured to correct the first distortion correction of the distortion in the left-right direction of the image and correct the distortion according to the tilt angle of the mounting surface in the distortion correction processing The second distortion correction of the distortion in the left-right direction and the vertical direction of the image, and the third distortion correction in which the distortion in the left-right direction and the vertical direction of the image is corrected by the correction intensity different from the second distortion correction is selected. The distortion correction is performed on each of the plurality of regions. A walkie-talkie machine, characterized in that it is used in a walkie-talkie system of any one of claims 1 to 13. A walkie-talkie handset is characterized in that it is used in the walkie-talkie system of any one of claims 1 to 13. A program for causing a computer to function as the image correcting unit in the walkie-talkie system of any one of claims 1 to 13.