JP4853380B2 - TV intercom - Google Patents

Description

  The present invention relates to a television interphone that enlarges and displays a part of a captured image.

  As a conventional television interphone, Patent Literature 1 discloses a pan / tilt zoom type television interphone including a slave unit having an imaging function and a master unit having a monitor screen for displaying a captured image captured by the slave unit. Yes. The TV interphone having such a configuration designates a zoom area (zoom position) by a user operation from a plurality of zoom areas provided in a monitor screen on which a captured image is displayed, and an image in the designated zoom area. Is cut out from the captured image and enlarged on the monitor screen.

  Note that, as a television interphone having the above-described function, Patent Literature 2 discloses a television door phone device. The television doorphone device of Patent Document 2 can also cut and enlarge an area designated by a pan / tilt button.

  By the way, when a user designates a desired zoom area using a conventional TV interphone, it is possible to finely move and set the zoom area at the pixel unit level. There is a problem that it takes time to move to the zoom area, which is difficult for the user to use.

For this reason, the zoom area that can be specified is limited to a plurality of (for example, m × n) fixed positions in the monitor screen in advance, and the desired zoom area is moved by moving the zoom area vertically and horizontally between these zoom areas. The one that specifies is being developed. Here, FIG. 6 shows an example in the case of a zoom magnification of 2 × and 3 × 3 specifiable zoom areas. In FIG. 6, “x” represents each center point of the specifiable zoom region, and the dotted line indicates each zoom region. The plurality of zoom areas that can be designated are set such that the center distance between two adjacent zoom areas is equal.
Japanese Patent Laid-Open No. 6-38214 (paragraph 0006 and FIGS. 1 and 2) Japanese Patent Laying-Open No. 2006-101327 (paragraph 0026 and FIG. 1)

  By the way, since the conventional TV interphone cannot continuously move the zoom area at the pixel unit level in the monitor screen, it is possible to include a part of an object to be enlarged and displayed in any zoom area. However, there are cases where all of the above objects cannot be included in any zoom region. For such a TV intercom, it is not necessary to include all of the objects to be enlarged at all positions in the monitor screen in the zoom area, and the above objects are included in the zoom area in a part of the monitor screen. There is a user's request that it should be possible.

  However, in the conventional TV intercom, since the center interval between adjacent zoom areas in the monitor screen is set to be equal, the monitor screen is adjacent in a portion where all the objects to be enlarged are included in the zoom area. The distance between the zoom areas is too wide to satisfy the user's request.

  For example, when a wide-angle lens having a horizontal angle of view of 120 ° or more is used for the slave unit, barrel distortion occurs in the captured image captured using the wide-angle lens, and the closer to the periphery of the captured image as shown in FIG. However, in the conventional TV interphone, as shown in FIG. 8, the image pickup range to be picked up at a certain size is adjacent to the monitor screen on which the picked-up image is displayed. Since the center interval of the zoom area to be set is equal, when the zoom area is switched to the adjacent zoom area, it is included in the zoom area after switching from the imaging range included in the zoom area before switching. The amount of movement to the imaging range is smaller as it is closer to the center of the monitor screen, and conversely, it is greater as it is closer to the monitor screen.

  For example, as shown in FIG. 8, when the zoom area at the center point A is switched to the zoom area at the center point B (the movement of the zoom area near the center of the monitor screen), the center point D is changed from the zoom area at the center point C. When the zoom area is switched to (the movement of the zoom area in the vicinity of the periphery of the monitor screen), the movement amount of the zoom area in the monitor screen (the distance of the center interval AB and the distance of the center interval CD) is the same. When the zoom area at the center point C is switched to the zoom area at the center point D, the zoom area before the switching is included in comparison with the case where the zoom area at the center point A is switched to the zoom area at the center point B. The amount of movement from the current imaging range to the imaging range included in the zoom area after switching increases.

  For this reason, the conventional television interphone has a sense of incongruity to the user because the amount of movement of the actual imaging range due to the switching operation to the adjacent zoom area varies depending on the position of the monitor screen.

  As another example, the imaging target is generally often imaged near the center of the captured image. However, conventional television intercoms have an imaging target imaged near the center of the captured image. Thus, it is impossible to cut out by specifying the zoom region including the imaging target accurately by narrowing the interval between the zoom regions.

  As a solution to the problems that occur in conventional TV intercoms as described above, it is conceivable to increase the number of zoom areas that can be specified. However, as described above, movement to a desired zoom area is possible. Another problem occurs that takes time.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a television interphone that can include an object to be enlarged and displayed in a zoom area according to a user's request.

According to the first aspect of the present invention, there are provided an imaging unit, a monitor screen for displaying a captured image captured by the imaging unit, and a plurality of the same size provided in the monitor screen so as to have different central positions. Zoom area designating means for designating any one zoom area from among the zoom areas, cutting out means for cutting out an image of the zoom area designated by the zoom area designating means from the captured image, and cutting out by the cutting means image zoom range and a display control means for enlarged display on the monitor screen, the image pickup means has a wide-angle lens, and in that the reference point in the monitor screen is an optical axis of said imaging means, said as the plurality of zoom regions provided in the monitor screen is the distance in the vertical direction from the first reference line extending in the lateral direction through the reference point becomes longer, the upper With narrowing the distance between the centers of the two zoom regions adjacent in the direction, two zoom regions lateral distance from the second reference line extending in the vertical direction through the reference point as long, adjacent to the left-right direction It is characterized in that it is set so as to narrow the center interval.

According to a second aspect of the present invention, there are provided an image pickup means, a monitor screen for displaying a picked-up image picked up by the image pickup means, and a plurality of the same size provided in the monitor screen so as to have different central positions. Zoom area designating means for designating any one zoom area from among the zoom areas, cutting out means for cutting out an image of the zoom area designated by the zoom area designating means from the captured image, and cutting out by the cutting means Display control means for enlarging and displaying an image of the zoom area on the monitor screen, wherein the plurality of zoom areas provided in the monitor screen extend in the left-right direction through a reference point in the monitor screen. as the distance in the vertical direction from the reference line is long, it widens the distance between the centers of the two zoom regions adjacent in the vertical direction, through the reference point As the distance in the lateral direction of the second reference line extending in the downward direction increases, characterized in that it is configured to widen the center distance of the two zoom regions adjacent in the lateral direction.

The invention of claim 3 is characterized in that in the invention of claim 2 , setting means for setting the position of the reference point is provided.

According to the first aspect of the present invention, when barrel-shaped distortion occurs in the captured image, the zoom area is located in the vicinity of the center of the monitor screen or in the vicinity of the imaging range included in the zoom area before switching. Since the amount of movement of the zoom area after switching to the imaging range can be made equal, the user's uncomfortable feeling can be eliminated. As a result, according to the first aspect of the present invention, a zoom area in accordance with the user's request can be set in the monitor screen. Therefore, an object to be enlarged and displayed according to the user's request can be included in the zoom area. it can.

According to the invention of claim 2, the imaging target that the user wants to confirm is often displayed near the center of the captured image, and in such a case, the position of the zoom area is finely adjusted so that the imaging target is reflected at the center. be able to. As a result, according to the second aspect of the present invention, the zoom area can be set in accordance with the user's request in the monitor screen. Therefore, an object to be enlarged and displayed according to the user's request can be included in the zoom area. it can.

According to the invention of claim 3 , for example, when the center of the imaging target that the user wants to confirm and the optical axis of the imaging means are shifted, the reference point through which the first reference line and the second reference line pass is Since the center interval between two adjacent zoom areas can be set after offsetting from the point serving as the optical axis to the point where the imaging target is being imaged, the position of the zoom area can be set so that the imaging target is reflected in the center. It can be adjusted more finely.

(Embodiment 1)
First, the configuration of the television intercom according to the first embodiment will be described with reference to FIGS. This TV intercom is of an electronic zoom type, and as shown in FIG. 1, for example, a child device (camera child device) 1 that is installed outside a house such as a front door and images a visitor (imaging object), And a transmission line 3 that enables transmission and reception of signals between the slave unit 1 and the master unit 2.

  The subunit 1 is designated by a zoom area designating unit 22 (to be described later) from an imaging unit 10 that images a visitor by wearing a wide-angle lens 100 with a horizontal angle of view of 120 ° or more, and a captured image captured by the imaging unit 10. And a slave unit side communication interface unit 12 that transmits and receives signals to and from the master unit 2 via the transmission line 3. In this embodiment, the zoom magnification of each zoom area is doubled.

  The imaging unit 10 captures a visitor and A / D converts an analog signal of the captured image to generate a digital image signal. This digital image signal is output to the cutout unit 11.

  When a digital image signal is input from the imaging unit 10, the clipping unit 11 directly inputs the input digital image signal as a slave unit when there is no designation signal to be described later from the master unit 2 via the slave unit side communication interface unit 12. To the side communication interface unit 12.

  On the other hand, when the designation signal is input, the cutout unit 11 cuts out the image of the zoom area corresponding to the position information (for example, the center coordinates of the zoom area) included in the designation signal from the captured image. After cutting out the image of the zoom area, the cutout unit 11 outputs a digital image signal of the cutout image to the slave side communication interface unit 12.

  When receiving the designation signal described later from the parent device 2, the slave side communication interface unit 12 outputs the received designation signal to the cutout unit 11. In addition, when the digital image signal related to the captured image and the image in the zoom area is input from the clipping unit 11, the slave side communication interface unit 12 outputs the input digital image signal to the base unit 2.

  On the other hand, the master unit 2 displays a captured image captured by the master unit side communication interface unit 20 that transmits and receives signals to and from the slave unit 1 via the transmission line 3 and the imaging unit 10 of the slave unit 1. The image display unit 21 having a monitor screen (for example, a liquid crystal screen) 210 and any one of a plurality of zoom regions having the same size provided in the monitor screen 210 so as to have different central positions. A zoom area designation unit 22 that designates an area, and a control unit 23 that controls the base-side communication interface unit 20, the image display unit 21, and the zoom area designation unit 22 are provided.

  The base-side communication interface unit 20 transmits a designation signal (described later) input from the control unit 23 to the slave unit 1. The base-side communication interface unit 20 receives a digital image signal from the slave unit 1 and outputs the received digital image signal to the control unit 23.

  When the digital image signal is input from the control unit 23, the image display unit 21 displays the captured image captured by the imaging unit 10 on the monitor screen 210 based on the input digital image signal, or the clipping unit 11. The image of the zoom area cut out from the captured image is enlarged and displayed on the monitor screen 210.

  The zoom area designating unit 22 outputs an operation signal to the control unit 23 every time the user performs an operation of switching the zoom area with respect to a plurality of specifiable zoom areas set in the monitor screen 210.

  When an operation signal is input from the zoom area designation unit 22, the control unit 23 generates a designation signal including position information (for example, center coordinates) of the zoom area switched by the zoom area designation unit 22. Output to the base unit side communication interface unit 20. In addition, when a digital image signal is input from the parent-side communication interface unit 20, the control unit 23 outputs the input digital image signal to the image display unit 21 and is captured by the imaging unit 10 of the slave unit 1. The captured image or the image of the zoom area cut out by the cutout unit 11 is enlarged and displayed on the monitor screen 210.

The control unit 23 sets the positions of a plurality of zoom regions that can be specified provided on the monitor screen 210 of the image display unit 21. As shown in FIG. 2, the center points A _{11 to} A ₅₅ of a plurality (5 × 5 in FIG. 2) of zoom regions are set such that the center intervals between two adjacent zoom regions are unequal. ing.

Specifically, the center points A _{11 to} A ₅₅ of the plurality of zoom areas are the first reference lines extending in the left-right direction through the reference point A ₃₃ that is the optical axis of the imaging unit 10 in the monitor screen 210. The distance between the centers of two adjacent zoom areas is set to be different according to the vertical distance from L1. In the first embodiment, according to the barrel distortion characteristic of the wide-angle lens 100 of the imaging unit 10, as the vertical distance from the first reference line L1 increases, the center interval between two adjacent zoom regions is reduced. Is set to For example, using the center points A ₁₂ , A ₂₂ , and A ₃₂ as an example, the distance from the first reference line L1 is larger than the center distance (A ₃₂ -A ₂₂ ) of the zoom area near the first reference line L1. The center distance (A ₂₂ -A ₁₂ ) of the zoom areas that are far apart is narrower. That is, the center interval (A _2a -A _1a ) is narrower than the center interval (A _3a -A _2a ) (a = 1 to 5). Similarly, the center interval (A _4a -A _5a ) of the zoom region that is farther from the first reference line L1 than the center interval (A _3a -A _4a ) of the zoom region that is near the first reference line L1. Is narrower (a = 1 to 5).

At this time, the plurality of zoom regions are set so that the adjacent portions partially overlap in the vertical direction. For example, in the case of the zoom area of the zoom range and the center point A ₃₂ of the center point A _22, it overlaps the upper zoom range of the lower and the center point A ₃₂ in the zoom area of the center point A _22. If the zoom area of the zoom range and the center point _{A 22} of the center point _{A 12,} since the center distance _(A 12 _{-A 22)} is narrower than the center spacing _(A 22 _{-A 33),} the portion further overlaps Become more.

On the other hand, the center points A _{11 to} A ₅₅ of the plurality of zoom areas correspond to the distance between the adjacent two zoom areas in accordance with the distance in the left-right direction from the second reference line L 2 that extends in the vertical direction through the reference point A ₃₃ . The center interval is set to be different. In the first embodiment, according to the barrel distortion characteristic of the wide-angle lens 100 of the imaging unit 10, the center interval between two adjacent zoom regions is reduced as the distance in the left-right direction from the second reference line L2 increases. Is set to For example, when the center points A ₄₃ , A ₄₄ , and A ₄₅ are used as an example, the distance from the second reference line L2 is larger than the center distance (A ₄₃ −A ₄₄ ) of the zoom area near the second reference line L2. The center interval (A ₄₄ -A ₄₅ ) of the zoom areas that are far apart is narrower. That is, the center interval (A _b4 -A _b5 ) is narrower (b = 1 to 5) than the center interval (A _b3 -A _b4 ). Similarly, the center interval (A _b2 -A _b1 ) of the zoom region that is farther from the first reference line L1 than the center interval (A _b3 -A _b2 ) of the zoom region near the first reference line L1. Is narrower (b = 1 to 5).

At this time, the plurality of zoom regions are set so that adjacent portions partially overlap in the left-right direction. For example, in the case of the zoom area of the zoom range and the center point A ₄₄ of the center point A _43, are overlapped with the left side of the zoom area to the right and the center point A ₄₄ in the zoom area of the center point A _43. In the zoom region of the center point A _{44 and} the zoom region of the center point A ₄₅ , the center interval (A ₄₃ -A ₄₄ ) is narrower than the center interval (A ₄₄ -A ₄₅ ). Become more.

  In the present embodiment, the number of zoom regions that can be specified is 5 × 5. However, even when more zoom regions can be specified, the first reference line L1 and the second reference line L2 are used. The position of each zoom region may be set so that the center distance between adjacent zoom regions becomes narrower as the distance from the camera becomes longer, that is, as the distance from the captured image becomes closer.

  Next, the operation of this embodiment will be described. First, the imaging unit 10 of the slave unit 1 captures a visitor and generates a digital image signal. This digital image signal is transmitted to the master unit 2 via the cutout unit 11 and the slave unit side communication interface unit 12. In the base unit 2, the control unit 23 acquires a digital signal via the base unit side communication interface unit 20 and outputs the digital signal to the image display unit 21. When acquiring the digital image signal, the image display unit 21 displays a captured image based on the digital image signal on the monitor screen 210 under the control of the control unit 23. That is, a visitor is displayed on the monitor screen 210.

  At this time, the resident will see the captured image displayed on the monitor screen 210, but since the entire captured image is displayed on the monitor screen 210, the appearance of the visitor is small, and who is visiting In some cases, it cannot be determined. In this case, the resident is operating the zoom area designating unit 22 while switching the zoom area while observing the captured image displayed on the monitor screen 210 to designate the zoom area including the visitor. The zoom area designating unit 22 outputs an operation signal to the control unit 23 when the zoom area is designated. When the operation signal is input, the control unit 23 generates a designation signal including position information of the zoom area designated by the zoom area designation unit 22. This designation signal is transmitted from the parent device side communication interface unit 20 to the child device 1.

  In the slave unit 1, when the cutout unit 11 acquires the designation signal via the slave unit side communication interface unit 12, the image of the zoom region corresponding to the position information included in the designation signal is cut out from the captured image. A digital image signal relating to the cropped image of the zoom area is transmitted from the slave unit side communication interface unit 12 to the master unit 2.

  In the master unit 2, the control unit 23 acquires a digital image signal via the master unit side communication interface unit 20, controls the image display unit 21, and displays a zoom region image based on the digital image signal on the monitor screen 210. To zoom in.

As described above, according to the present embodiment, a zoom area in accordance with the user's request can be set in the monitor screen 210, so that an object to be enlarged and displayed according to the user's request can be included in the zoom area. In particular, the zoom area is displayed on the monitor screen when barrel distortion occurs in the captured image by narrowing the center interval between the plurality of zoom areas that can be specified away from the reference point A ₃₃ that overlaps the optical axis of the imaging unit 10. The amount of movement from the imaging range included in the zoom area before switching to the imaging range in the zoom area after switching can be made equal regardless of whether it is near or around the center of 210, thereby eliminating the user's uncomfortable feeling. be able to.

(Embodiment 2)
By the way, depending on the state of use of the TV intercom, the standing position of the visitor can be limited to the vicinity of the center of the imaging range of the imaging unit 10, that is, the center of the monitor screen 210. In some cases, the area is finely adjusted, and the vicinity of the periphery of the captured image may be adjusted roughly.

Therefore, in the television intercom according to the second embodiment, as shown in FIG. 3, the vertical direction from the first reference line L1 extending in the left-right direction through the reference point A ₃₃ overlapping the optical axis of the imaging unit 10 in the captured image. as the distance becomes longer, while being set to widen the center distance between two adjacent zoom region, a second reference line extending in the vertical direction through the reference point a ₃₃ overlapping the optical axis of the imaging unit 10 L2 The distance between the centers of two adjacent zoom regions is set to increase as the distance in the left-right direction increases. In addition, about the component similar to Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

The cutout unit 11 according to the present embodiment is configured such that the center interval (A of the zoom region that is farther from the first reference line L1 than the center interval (A ₃₂ -A ₂₂ ) of the zoom region that is near the first reference line L1. more of the ₂₂ -A ₁₂₎ is wider. That is, the center interval (A _2a -A _1a ) is wider than the center interval (A _3a -A _2a ) (a = 1 to 5). Similarly, the center interval (A _4a -A _5a ) of the zoom region that is farther from the first reference line L1 than the center interval (A _3a -A _4a ) of the zoom region that is near the first reference line L1. Is wider (a = 1 to 5).

In addition, the cutout unit 11 according to the present embodiment is configured such that the center interval of the zoom region that is farther from the second reference line L2 than the center interval (A ₄₃ -A ₄₄ ) of the zoom region that is close to the second reference line L2. (A ₄₄ -A ₄₅ ) is wider. That is, the center interval (A _b4 -A _b5 ) is wider than the center interval (A _b3 -A _b4 ) (b = 1 to 5). Similarly, the center interval (A _b2 -A _b1 ) of the zoom region that is farther from the first reference line L1 than the center interval (A _b3 -A _b2 ) of the zoom region near the first reference line L1. Is wider (b = 1 to 5).

  As described above, according to the present embodiment, the visitor (imaging target) that the user wants to check is often displayed near the center of the captured image. In such a case, the center interval of the zoom area is set to the optical axis of the imaging unit 10. By expanding the distance away from the camera, the position of the zoom area can be finely adjusted so that the visitor is reflected in the center.

(Embodiment 3)
As shown in FIG. 4, the television interphone according to the third embodiment includes the imaging unit 10, the cutout unit 11, and the slave unit side communication interface unit 12 in the slave unit 1 a, as shown in FIG. 4. The setting unit 13 that sets the position of the reference point A ₃₃ that passes through the first reference line L1 and the second reference line L2 to a position different from the point that becomes the optical axis of the imaging unit 10 is provided. The second embodiment is different from the second embodiment in that the device 1a is provided. In addition, about the component similar to Embodiment 2, the same code | symbol is attached | subjected and description is abbreviate | omitted.

The setting unit 13 is composed of, for example, a DIP switch. When the reference point A ₃₃ is moved to, for example, the position of a visitor's face by the user's operation on the DIP switch, a setting signal is sent according to the operation. Generate. This setting signal is transmitted to the master unit 2 via the slave unit side communication interface unit 12. In the base unit 2, the control unit 23 moves the reference point A ₃₃ based on the setting signal.

In the present embodiment, the center points A _{11 to} A ₅₅ of each zoom region when the reference point A ₃₃ is moved by the setting unit 13 are shown in FIG. In Figure 5, the reference points A ₃₃ indicates the case of moving from the upper reference point A ₃₃ of the second embodiment _(see FIG. 3). Since the reference point A ₃₃ has moved upward, the first reference line L1 is also positioned above the first reference line L1 (see FIG. 3) of the second embodiment. Then, the cutout unit 11 of the present embodiment adjoins the center points A _{11 to} A ₅₅ of the plurality of zoom regions as the distance in the vertical direction from the first reference line L1 at the above position increases. The center distance between the two zoom areas is set to be widened. From FIG. 5, the center interval (A _2a -A _1a ) of the zoom region that is farther from the first reference line L1 than the center interval (A _3a -A _2a ) of the zoom region that is near the first reference line L1. Is wider (a = 1-5). Similarly, the center interval (A _4a -A _5a ) of the zoom region that is farther from the first reference line L1 than the center interval (A _3a -A _4a ) of the zoom region that is near the first reference line L1. Is wider (a = 1 to 5).

By the way, in this embodiment, since the reference point A ₃₃ is located above the center of the captured image, the region below the first reference line L1 in the captured image is wider than the region above it. . For this reason, the center interval (A _3a -A _4a ) of the lower zoom region is wider than the center interval (A _3a -A _2a ) of the zoom region on the upper side, and similarly, the center interval (A _2a -A) towards the center distance _(a 4a _{-A 5a)} than _1a) it is wide.

If the position of the reference point _{A 33} has not been changed by the setting unit 13, the central point _A 11 _{to A 55} each zoom area is the same as in Embodiment 2 (see FIG. 3).

As described above, according to the present embodiment, for example, when the center of the visitor (imaging target) that the user wants to confirm is shifted from the optical axis of the imaging unit 10, the first reference line L1 and the second reference line L2 are used. the reference points a ₃₃ through which, from the viewpoint is offset to a visitor from a point serving as the optical axis is imaged, it is possible to set the center distance between two adjacent zoom region, visitor center The position of the zoom area can be adjusted more finely as shown in FIG.

For example, when the child unit 1a is attached at a height of 120 cm to 140 cm from the ground, the face of a general adult is often imaged above the monitor screen 210. In such a case, in the second embodiment, the center distance of the zoom area is set with the center of the monitor screen 210 as the reference point A ₃₃ (see FIG. 3), but in the third embodiment, the position of the reference point A ₃₃ is set. is moved to the position of the face of the general adult, the reference points a ₃₃ moved, to set the first reference line L1 and the second reference line L2, the first reference line L1 and the second reference line The closer the distance to L2, the narrower the center interval of the zoom region, and the closer the monitor screen 210, the wider the center interval of the zoom region. As a result, the position can be finely adjusted in the vicinity of the position where the face of the visitor is often reflected, and the adjustment is made roughly in the peripheral portion where the face is not reflected so that the convenience of the user can be improved. .

As a modification of the third embodiment, the control unit 23 may move the reference point A ₃₃ in the left-right direction by an operation on the setting unit 13 and set a plurality of specifiable zoom regions.

In addition, as another modification of the third embodiment, a setting unit having a function similar to that of the setting unit 13 described above, instead of the setting unit 13 together with or in place of the setting unit 13 provided in the slave unit 1a. You may prepare. When the setting unit is provided in the parent device 2, the setting signal set by the setting unit of the parent device 2 is output to the control unit 23, and the control unit 23 moves the reference point A ₃₃ according to the setting signal, A plurality of zoom areas that can be specified are set.

(Embodiment 4)
The television intercom according to the fourth embodiment is as shown in FIG. 4, and the control unit 23 makes two adjacent zooms as the distance in the vertical direction from the first reference line L1 becomes longer as in the first embodiment. In addition to the function of narrowing the center distance between the regions and setting the center distance between the two adjacent zoom regions to be narrowed as the distance in the left-right direction from the second reference line L2 increases, as in the second embodiment In addition, as the vertical distance from the first reference line L1 increases, the center distance between the two adjacent zoom regions is increased, and as the distance in the left-right direction from the second reference line L2 increases, the adjacent distance increases. And a switching means for switching between the two functions. Furthermore, the television intercom of the present embodiment includes the setting unit 13 as in the third embodiment.

As described above, according to the present embodiment, the positions of the center points A _{11 to} A ₅₅ of each zoom region can be appropriately changed according to the user's request, the captured image, and the purpose.

  As a modification of the fourth embodiment, the setting unit 13 may not be provided.

It is a block diagram of Embodiment 1,2. It is a figure which shows the zoom area same as the above. FIG. 10 is a diagram illustrating a zoom area according to the second embodiment. It is a block diagram of Embodiments 3 and 4. It is a figure which shows the zoom area same as Embodiment 3. FIG. It is a figure which shows the zoom area | region of a prior art example. It is a figure which shows the captured image which barrel distortion generate | occur | produced. It is explanatory drawing for demonstrating the problem of barrel distortion.

Explanation of symbols

1, 1a Slave unit 10 Imaging unit 11 Cutting unit 13 Setting unit 2 Master unit 21 Image display unit 210 Monitor screen 22 Zoom area designation unit 23 Control unit

Claims (3)

Imaging means;
A monitor screen for displaying a captured image captured by the imaging means;
Zoom area designating means for designating any one zoom area from among a plurality of zoom areas provided in the monitor screen so as to have different central positions and having the same size;
Clipping means for cutting out an image of the zoom area designated by the zoom area designation means from the captured image;
Display control means for enlarging and displaying the image of the zoom area cut out by the cutting means on the monitor screen,
The imaging means has a wide-angle lens;
The reference point in the monitor screen is the optical axis of the imaging means,
As the plurality of zoom area provided in the monitor screen is the distance in the vertical direction from the first reference line extending in the lateral direction through the reference point becomes longer, two zoom regions adjacent in the vertical direction with narrowing the distance between the centers of the set as the horizontal distance from the second reference line extending in the vertical direction through the reference point becomes longer, so as to narrow the distance between the centers of the two zoom regions adjacent in the lateral direction TV intercom characterized by being. Imaging means;
A monitor screen for displaying a captured image captured by the imaging means;
Zoom area designating means for designating any one zoom area from among a plurality of zoom areas provided in the monitor screen so as to have different central positions and having the same size;
Clipping means for cutting out an image of the zoom area designated by the zoom area designation means from the captured image;
Display control means for enlarging and displaying the image of the zoom area cut out by the cutting means on the monitor screen,
The plurality of zoom regions provided in the monitor screen are adjacent in the vertical direction as the vertical distance from the first reference line extending in the left-right direction through the reference point in the monitor screen increases. widens the distance between the centers of the two zoom regions, as the distance in the lateral direction from the second reference line extending in the vertical direction through the reference point becomes longer, the distance between the centers of the two zoom regions adjacent in the lateral direction features and to ruthenate Levi intercom that it is set to widen. The television interphone according to claim 2, further comprising setting means for setting a position of the reference point .