WO2007058039A1

WO2007058039A1 - Camera for door scope

Info

Publication number: WO2007058039A1
Application number: PCT/JP2006/320608
Authority: WO
Inventors: Katsumi Komori
Original assignee: Artray Co., Ltd
Priority date: 2005-11-15
Filing date: 2006-10-17
Publication date: 2007-05-24
Also published as: JP2007142605A

Abstract

A novel camera for a door scope usable without major modification of an existing door scope. The camera (10) for a door scope, capable of being movably attached to the indoor side of the door scope (1). The camera (10) has imaging means (12, 16) for imaging an outdoor view through the door scope (1), correction means (22, 24) for correcting a wide angle image from the imaging means, and a display device (42) for displaying the image corrected by the correction means (22, 24). The wide angle image is displayed as an image appropriate for use.

Description

Specification

Door scope camera

Technical field

The present invention relates to a door scope camera, and more specifically, a camera that can be attached to the indoor side of a door scope, and includes a camera, an LCD (liquid crystal display device), an image storage memory, and the like. It relates to digital cameras.

Background art

[0002] A door scope attached to a door of an apartment house, a guest room of a hotel, or the like is provided for visually checking the situation from the indoor side to the outdoor side.

[0003] FIG. 1A is a cross-sectional view of an example of the door scope 1, FIG. 1B is a view showing the door scope 1 attached to the door 5, and FIG. 1C is a view showing the door scope 1 attached to the door 5. It is.

As shown in FIG. 1A, the door scope 1 has a holding hole (opening) 8 on the rear side. As shown in FIG. 1B, when the door scope 1 is attached to the door 5, the body part 3 with a built-in fisheye lens having a male screw formed on the outer peripheral surface from the outside through the ring-shaped member 4 is attached. Insert the lens cover 2 into the through hole of the door 5. The cylinder portion 6 having an internal thread formed on the inner peripheral surface is inserted from the inside of the room and turned, and is engaged with the main body portion 3 until the door 5 is pressed against the door 5. In this way, as shown in FIG. 1C, the door scope 1 is attached to the door 5, through which the outdoor state (scenery) can be seen from the indoor viewing hole 8.

The present invention is a door scope camera used in such a door scope 1. Note that the present inventor is not aware of the existence of published patent documents or technical documents related to the door scope camera used in the door scope 1.

Disclosure of the invention

Problems to be solved by the invention

[0006] In order to check the state of the outdoor side using such a door scope 1, it is necessary to bring the eyes close to the viewing hole 8 of the door scope 1 every time. Doorscope 1 is installed with a through-hole at a certain location on door 5, so the height from the floor to the doorscope is constant. The long high, the person must bend and look at the witness hole 8, and on the contrary, the low height, the person must stretch out and see it, which is inconvenient.

[0007] Furthermore, since the door scope 1 has a structure in which the outside of the room is viewed through a very small diameter through hole, generally, a fisheye lens is used to view a wide range of the outside of the room. Yes. However, a fisheye lens is generally a type of wide-angle lens with an angle of view of 140 degrees or more, so the image through it shows barrel distortion along the edge due to the extreme angle of view, and it is visible outside the room. The scene (scenery) is distorted and very difficult to see.

[0008] Furthermore, in some cases, the interior side can be seen through the door scope 1 from the outside of the room, and there is also a security problem.

Means for solving the problem

In view of these problems, an object of the present invention is to provide a novel door scope camera.

[0010] Furthermore, an object of the present invention is to provide a new door scope camera that can be used without drastically changing a door scope that has already been installed.

In view of the above object, the door scope camera according to the present invention is detachably installed on the indoor side of the door on which the door scope is installed, and corrects a wide-angle image of the outdoor side from the door scope. Display on the display device.

[0012] Further, the door scope camera may further include a memory, and a wide-angle image of the outdoor side from the door scope may be recorded in the memory.

[0013] Further, the door scope camera according to the present invention is a door scope camera that is detachable directly to the indoor side of the door scope, and imaging means for photographing a state of the outdoor side through the door scope. And a correction unit that corrects the wide-angle image from the imaging unit and a display device that displays the image corrected by the correction unit, and displays the wide-angle image as an appropriate image.

[0014] Further, in the door scope camera, the correcting means may enlarge the central region of the wide-angle image.

[0015] Further, in the door scope camera, the correction means includes an address of the wide-angle image. It is also possible to have an address conversion table for converting the image into the address of an appropriate image.

Furthermore, in the door scope camera, the address conversion table may be stored in replaceable memory.

[0017] Further, the door scope camera may further include a trigger means by sound so that the camera body is activated in response to sound of a predetermined level or higher.

[0018] Further, the door scope camera further includes manual mode means, and when the manual mode switch is pressed, the outdoor state can be displayed on the display device.

[0019] Further, the door scope camera can further include an image memory and record an image corrected by the correcting means.

[0020] Further, the door scope camera may further include an image memory, and the image corrected by the correction unit may be recorded as a still image.

Furthermore, the door scope camera may further include an image memory, and the image corrected by the correction unit may be recorded as a moving image.

[0022] Further, the door scope camera may further include a recorded image reading unit, and a video already recorded in the image memory can be read and displayed on the display device.

[0023] Furthermore, the door scope camera may further include a focusing means.

[0024] Further, the door scope camera further includes mode switching means, and mode switching can be performed among a setting mode, a sound trigger mode, a manual mode, and a recorded image reading mode.

The invention's effect

In view of these problems, the present invention can provide a novel door scope camera.

[0026] Furthermore, the present invention can provide a novel door scope that can be used without significantly changing a door scope camera that has already been installed.

Brief Description of Drawings

[0027] FIG. 1A is a cross-sectional view of an example of a door scope 1.

FIG. 1B is a diagram showing a state where the door scope 1 is attached to the door 5.

FIG. 1C is a diagram showing a state in which the door scope 1 is attached to the door 5. FIG. 2A is an external perspective view of the front side of the case of the door scope camera 10 according to the present invention.

FIG. 2B is an external perspective view of the back side of the case of the door scope camera 10.

[Figure 2C] Figure 2C shows the doorscope camera attached to the doorscope 10 installed on the door 5 1

FIG.

FIG. 3 is an example of a block diagram of an internal circuit of the door scope camera 10.

FIG. 4 is a flowchart for explaining the operation (usage method) of the door scope camera 10.

Explanation of symbols

[0028] 1: Door scope, 2: Lens cover, 3: Body, 4: Ring-shaped member, 5: Door, 6:

Cylinder part, 8: Shimizu hole (opening), 10: Camera for door scope, 12: Optical lens, 16: CCD / CMOS image sensor, 18: Correlated double sampling circuit and automatic gain control circuit (CDS / AGC), 20: A—D conversion circuit, 22: FPGA, 24: Fisheye correction means, 26: Memory interface (memory IF), 28: Image memory, 30: Built-in sound collection microphone (MIC), 32: Amplifier (AMP), 34: Power supply, 36: Threshold circuit (Th), 38: Power switch (PWSW), 39: Mode selection switch, 40: Display device controller (LCDCTR), 42: Liquid crystal display device, LCD, 44: Aperture drive mechanism, 46: Timing generator (timing GEN), 48: Timer, 50: CPU, 51: Memory (RAM, ROM), 52: Power switch, 54: First LED (battery Off indicator), 56: second LED (power-on indicator), 58: third LED (sound trigger indicator), 59: fourth L ED (setting mode indicator), 62: Manual mode switch, 64, 66: Parameter setting button, 68: Camera lens opening, 70: Screw-in lens member, 72: Battery compartment cover, 74: Opening recess 76: Hanging member, 78: Permanent magnet, Double-sided tape,

BEST MODE FOR CARRYING OUT THE INVENTION

[0029] Hereinafter, embodiments of a door scope camera according to the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the same element shown on drawing, and the overlapping description is abbreviate | omitted. [0030] [Appearance structure of door scope camera]

2A is an external perspective view of the front side of the case of the door scope camera 10 according to the present invention, FIG. 2B is an external perspective view of the back side of the case of the door scope camera 10, and FIG. 2C is a door installed on the door 5 4 is a cross-sectional view of a door scope camera 10 attached to the scope 10. FIG.

As shown in FIG. 2A, an LCD (Liquid Crystal Display) 42 is provided in the upper half of the front panel of the door scope camera 10. The lower half of the front panel is equipped with manual mode switch 62 on the upper right, and four indicator LEDs (light emitting diodes) 54, 56, 5 8, 59 on the left, and from right to left on the lower side. A parameter setting switch 66, 64, a mode selection switch 39, and a built-in sound collecting microphone 60 are provided. A sliding power switch 52 is provided on the left side of the case.

[0032] The four LEDs sequentially turn on and display the following camera states.

[0033] The first LED 54 is an indicator of "battery status". This indicator lights up when the battery is below the specified voltage.

[0034] The second LED 56 is an indicator of "power ON display". This indicator lights up when the power is on.

[0035] The third LED 58 is an indicator of "trigger by sound". This indicator lights up in the trigger mode by sound. On the other hand, it does not light up in manual mode.

The fourth LED 59 is an indicator of “setting mode”. This indicator lights up in the setting mode. On the other hand, it does not light in manual mode and sound trigger mode.

[0037] As shown in FIG. 2B, on the back side of the case of the door scope camera 10, there are doors at both upper ends.

A pair of suspension members 76 that engage with the L-shaped bracket (see reference numeral 79 in FIG. 2C) attached to 5, a battery compartment cover 72 and its opening recess 74, and a camera lens (see reference numeral 12 in FIG. 3) An opening 68 is provided. Typically, a battery such as a rechargeable nickel metal hydride battery or an alkaline battery is used as the battery. The opening 68 of the camera lens may be a screw-in member (see reference numeral 70 in FIG. 2C) in which the lens 12 is integrally formed, and may be focused by turning this.

[0038] A pair of broken line portions at both ends are members for fixing to the door 5, for example, permanent magnets. Stick stone 78 and fix it to the door. You can use multiple thin magnets and adjust the height according to the number you use. Or, for example, you can apply double-sided tape 78 and fix it to door 5. In this case, the height may be adjusted by the number of sheets to be used by using a thin double-sided tape.

[0039] As shown in FIG. 2C, the L bracket 79 is attached to the door 5 on which the door scope 1 is installed. The hanging member 76 of the door scope camera 10 is hung on the L bracket 79, and the door scope camera 10 is suspended. Further, if necessary, the door scope camera is fixed to the door 5 with a permanent magnet or double-sided tape 78 on the case back side of the door scope camera 10.

As described above, the door scope camera 10 is easily attached to and detached from the door 5. For example, when traveling, you can bring the doorscope camera 10 and easily attach it to the door of your hotel room. Even if the characteristics of the fisheye lens of the door scope 1 change, the screw-type member 70 can easily focus.

[0041] [Block diagram of internal circuit of camera for door scope]

[0042] The door scope camera 10 displays the outdoor state (scenery) seen from the door scope 1 on the display device, and therefore the optical system lens 12 for imaging the outdoor state (scenery) and the imaging device. CCD / CMOS image sensor 16 which is a chair, timing generator (timing GEN) 46 for driving this CCD / CMOS image sensor, and reset noise included in the video signal obtained from the CCD / CMOS image sensor ( Correlated double sampling circuit to remove low frequency) and automatic gain control circuit (CDS / AGC) 18 to amplify the video signal and control it to a certain level, and this analog video signal A to D conversion circuit 20 that converts the signal into a digital video signal, FPGA 22 that performs various signal processing on the digital video signal, and the video signal that has been processed in a liquid crystal display A display device controller (LCDCTR) 40 for controlling the order, and a liquid crystal display device (LC D) 42.

[0043] Further, since the door scope camera 10 is used when setting the operation mode of the door scope camera 10 described later, a mode selection switch (mode selection SW) 39 and a parameter setting switch (parameter setting SW) are used. ) 64, 66 In response, the power switch (PWSW) 38 is turned ON and the voltage of the power supply 34 is applied to the LCD 42, FPGA 22, etc.

[0044] Furthermore, the door scope camera 10 activates the camera body with a sound detected by the microphone as a trigger, so that a sound collecting microphone (MIC) 30 and an amplifier (AMP) 32 for amplifying the audio signal are provided. It has a threshold circuit (Th) 36, a power supply 34, and a power switch (PWSW) 38 for determining whether or not the amplified audio signal exceeds a certain reference value. The audio signal exceeds a certain reference value. In response to the output signal from the threshold circuit 36, the power switch 38 becomes 0N and the voltage of the power supply 34 is applied to the LCD 42, FPGA 22, and the like. Although not shown in the figure, the sound collecting microphone 30, the amplifier 32, the threshold circuit 36, and the like are always energized regardless of the state of the power switch 38.

[0045] Further, the door scope camera 10 is provided with a manual mode 'switch 62 in order to set the operation mode to a manual mode used when the user arbitrarily captures the stored image. In response, the power switch (PWSW) 38 is turned on and the voltage of the power source 34 is applied to the LCD 42, FPGA 22, and the like.

The CCD / CMOS image sensor 16 is preferably about 1300,000 pixels in order to enlarge an image as will be described later.

[0047] The FPGA 22 is a type of IC, but has a feature that a designer can assemble a desired hardware circuit using a personal computer and a simple device after purchase. In other words, the designer can purchase a suitable commercially available FPGA and customize it to the desired circuit. Similarly, even after the FPGA is installed in the final product, it can be upgraded to a more appropriate circuit.

In this embodiment, as the FPGA 22, an FPGA provided by Xilinx (Xilinx, Inc., California, USA) or Altera Corporation (Altera, California, USA) can be used. Note that CPLD (Complex Programmable Logic Device) may be used instead of FPGA.

The door scope camera 10 has three modes A, B, C, and D modes described later.

Mode selection switch 39 and parameter setting switches 64 and 66 are used to select modes A, B, and D, and manual mode switch 62 is used to select mode C. Details will be described later.

[0050] Although not shown in the figure, the FPGA 22 is a feeder back clamp circuit and a white clip circuit for fixing the black level, optical, and black of the digital video signal from the A-D converter 20 to a fixed reference value. It has a base clip circuit for clipping low level noise, an auto white balance circuit for white balance, and a camera signal processing process circuit including a γ correction circuit.

Further, the FPGA 22 receives signals from the mode selection switch 39 and the parameter setting switches 64 and 66, and executes the mode switching operation of the door scope camera 10.

Further, as will be described in detail later, the FPGA 22 has a fish-eye correction unit 24 and corrects a wide-angle image obtained through the door scope 1 using a fish-eye lens to an easily viewable image. The corrected image is displayed on the LCD 42 via the LCDCTR 40 and is stored in the image memory 28 via the memory interface (memory IF) 26.

The image memory 28 is made of, for example, SDRAM, can store still images for a preset number of sheets, and can store moving images for a preset time. For this reason, FIFO (first in, first out) memory is preferred when memory capacity is limited. The FPGA 22 receives the current time data of the date and time from the timer 48, and writes this current time data in a part of the corrected easy-to-view video.

The door scope camera 10 includes a CPU 50 for controlling each of these elements, and also stores memory (RAM, ROM) 51 for storing a door scope control program and used as a work area. It also has.

[0055] The door scope camera 10 may include an aperture drive mechanism 44 under the control of the CPU 50, and may be an autofocus system. However, instead of the aperture driving mechanism 44, the screw-type lens mechanism 70 described in FIGS. 2B and 2C may be simplified.

The fish-eye correction unit 24 of the FPGA 22 performs distortion correction on a wide-angle image obtained through the fish-eye lens of the door scope 1. This fisheye correction 24 prepares, for example, a reference table (address conversion table) (not shown) in which a transfer destination address is written with respect to a pixel address position of a wide-angle image obtained by watching the door scope 1. Display each camera pixel value of video arbitrarily By converting the address into a position and generating appropriate image data, an easy-to-view video is obtained.

[0057] For example, this easy-to-view video is realized by preparing first and second video buffers (not shown) for one frame, and displaying the wide-angle video obtained through the fisheye lens of the door scope 1 as the first video. Write to the video buffer, determine the post-conversion address by referring to the address conversion table from the (pre-conversion) address of each camera pixel value, and write the camera pixel value to the post-conversion address of the second video buffer Done. The address conversion table is prepared so as to convert pixels distorted in a fish-eye curve into position addresses to be normalized.

[0058] Furthermore, a plurality of conversion tables can be prepared to correspond to the characteristics of the fisheye lens of the door scope 1 such as a wide-angle 160 degree door scope, an ultra-wide angle 180 degree door scope, and an ultra-wide angle 200 degree door scope. Even if you do it.

[0059] The FPGA 22 may enlarge the data in the center area of the appropriate image data obtained by the address conversion to obtain an enlarged image of the center area. The CCD / CMOS image sensor 16 is preferably about 1.3 million pixels in order to prevent blurring even when the image is enlarged. Furthermore, a zoom process may be performed in which a plurality of conversion tables are prepared so that the central portion of the normalized image can be sequentially enlarged, so that the central portion of the image is continuously enlarged or reduced. .

[0060] Furthermore, a plurality of conversion tables are prepared corresponding to the positions of chimes, buzzers and bells attached to the doors, or positions where visitors will stand, and a part of a normalized image, for example, For example, the upper, lower, right, left side, etc. are displayed in the center, and the optimal image can be obtained regardless of which door is used.

[0061] The operation of the door scope camera 10 is roughly divided into four modes. These modes can be switched by operating the mode selection switch 39, parameter setting switches 64 and 66, and manual mode 'switch 62 on the front side of the camera.

[0062] In mode A (setting mode), the parameters of the door scope camera itself are selected and set. When mode selection switch 39 is pressed once, the setting mode is set, and “setting mode” is displayed on display device 42. The setting items are: (1) Set the timer (clock time) of the camera itself, (2) Adjust the trigger level by sound, (3) When triggering by sound and manual trigger (manual mode) The number of still images to be captured and the moving image capture time, and (4) the setting of each LCD display time when triggered by sound. These setting items are also displayed on the display device 42.

[0063] When the parameter setting switches 64 and 66 are operated, the displayed “setting items” are reversed in black and white in order, and the desired setting item is selected by further pressing the mode selection switch 39 at the position of the desired setting item. Is done. Next, by operating the parameter setting switches 64 and 66, the increase / decrease in the level of the setting item is an appropriate number, for example, .., -2, -1, 0, +1, +2,. . ”Is displayed, select the level, and press the mode selection switch 39 to confirm.

[0064] In mode B (sound trigger mode), the main body is activated with the sound detected by the built-in microphone 30 as a trigger, and a predetermined number of still images are recorded in the image memory 28. In the case of moving image capture, it is recorded in the image memory 28 for a preset time. At the same time, the LCD 42 is activated to display the outdoor situation seen from the door scope 1.

[0065] The starting sound is passed through a filter (not shown) that passes only the sound band such as chime, buzzer and bell sound, door knock sound, etc., and the sound amplified by the amplifier AMP32 is set by the threshold judgment circuit Th36. If it is determined that the sound level is higher than that, the power switch PWSW38 is turned on to activate the camera body.

[0066] Mode C (manual mode) is used when a user arbitrarily captures stored images. The manual mode is realized as a so-called interrupt operation by pressing the manual mode switch 62 on the camera body, and the LCD 42 is activated, and at the same time, the LCD 42 continuously displays the outdoor state as seen from the door scope. If desired, it may be recorded in the image memory 28.

[0067] Mode D (recorded image readout mode) is used when a user reads out an already recorded video. For example, after returning home from the home, in order to check the visitors when they are away from home, the images with the oldest recording time are read from the image memory 28 and displayed on the display device 42.

[0068] [Door Scope Camera Operation 'Usage Method]

FIG. 4 is a flowchart for explaining the operation (usage method) of the door scope camera 10. A part of this operation flowchart is computerized and stored in the memory 51 in advance. The CPU 50 reads and executes this computer program.

[0069] In step S10, mode selection is performed by pressing the mode selection switch 39 a predetermined number of times.

[0070] In step S11, it is determined whether or not mode A (setting mode) has been selected. For the selection of the mode A, for example, when the mode selection switch 39 is pressed once within a predetermined time, “setting mode” is displayed on the display device 42. When mode A is selected, the 4th LED (setting mode indicator) 59 lights up and the 3rd LED (sound trigger indicator) 58 goes off. If mode A is selected, the process proceeds to step S12. If mode A is not selected, the process proceeds to step S21.

[0071] In step S12, the camera body (FPGA 22, LCD 42, etc.) is activated, and the display device 42 displays setting items and the like.

[0072] In step S13, the parameters of the door scope camera itself are selected and set. The setting items are: (1) Set the timer (clock time) of the camera itself, (2) Adjust the trigger level by sound, (3) Number of images to be captured when triggered by sound and manual trigger, (4) Set the LCD display time for triggering by sound and manual triggering. Specifically, the setting items are selected using the meter setting switches 64 and 66 and determined by the mode selection switch 39, then the increase / decrease level is selected using the parameter setting switches 64 and 66 and the mode selection switch is selected. Determined by h39.

[0073] In step S14, it is determined whether or not the setting is completed. If the setting is not completed, the setting operation is continued in step S13. If the mode setting is completed, the process proceeds to step S15.

In step S15, it is determined whether or not the next mode is selected. If so, the process proceeds to step S10, and if there is no mode selection, the process is terminated.

[0075] In step S21, it is determined whether or not mode B (trigger mode by sound) has been selected.

For the selection of mode B, for example, when the mode selection switch 39 is pressed twice within a predetermined time, “trigger mode by sound” is displayed on the display device 42. When mode B is selected, the third LED (sound trigger indicator) 58 lights up and the fourth LED (setting mode indicator) 59 turns off. If mode B is selected, the process proceeds to step S22. If mode B is not selected, the process proceeds to step S31. [0076] In step S22, built-in microphone 30 detects sound. This detected sound is amplified to a predetermined level by the amplifier 32.

[0077] In step S23, the detection sound amplified by the threshold circuit 36 is set to a preset level.

It is determined whether or not (reference value) is exceeded. If it exceeds the set level, the process proceeds to step S24. If not, the process returns to step S22 to continue the microphone sound detection. The steady state of the camera 10 for a doscope is a state of going back and forth between step 22 and step 23, waiting for detection of a sound above a set level.

[0078] When the amplified detection sound exceeds the set level in step S24, the camera body (FPGA22, LCD42, etc.) is activated by the power switch 38, and the display device 42 is outside the door scope 1. Is displayed after performing the above-described distortion correction of the wide-angle video.

[0079] In step S25, the timer 48 is checked, and the date and time data is captured. This date and time data is written to a part of the video as desired. Further, it is used for determining the elapsed time in step 27.

[0080] In step S26, the image captured by the door scope camera is subjected to the above-described distortion correction of the wide-angle image, the enlargement process of the center region, and the like, and then taken into the image memory 28. Image memory 28 can be FIFO (first in first out) memory. At the same time, the image is displayed on the display device 42.

[0081] In step S27, it is determined whether the display time of the display device 42 has exceeded a preset display time. At the same time, it is determined whether or not the number of captured images stored in the image memory 28 exceeds the preset number of captured images. When either or both of the deviation and the deviation are exceeded, the imaging of the camera is terminated, and the process proceeds to step S15. In order to record multiple visits, 4 to 5 still images are recorded every few seconds for each visitor (ie, triggered by a single sound). Record the still image of the visitor (trigger with about 10 sounds).

In step S31, it is determined whether or not mode C (manual mode) has been selected. Selection of mode C is an interrupt operation performed by pressing and holding manual mode switch 62. When mode C is selected, the 4th LED (setting mode indicator) 59 lights up and the 3rd LED (sound trigger indicator) 58 turns off. Mode C If is selected, the process proceeds to step S32. If mode C is not selected, the process proceeds to step S41.

[0083] In step S32, the camera body (FPGA22, LCD42, etc.) is activated in mode C (manual mode), and the display device 42 performs the above-described wide-angle image distortion correction, etc. To display. If desired, the outdoor state may be taken into the image memory 28.

[0084] In step S33, it is determined whether or not the manual mode switch 62 is turned off.

. If OFF, proceed to step S15. Unless OFF, return to step S32 and display device

42 displays the outdoor state.

In step S41, it is determined whether or not mode D (recorded image reading mode) has been selected. The mode D is selected by, for example, pressing the mode selection switch 39 three times within a predetermined time. If mode D is selected, the process proceeds to step S42. If mode D is not selected, the process returns to step S10 and waits for mode selection.

[0086] In step S42, in mode D (recorded image readout mode), the camera body (FPGA22, L

CD42 etc.) is activated, and the display device 42 starts displaying.

[0087] In step 43, the video recorded in the image memory 28 is read in order from the video having the oldest recording time, and displayed on the display device 42.

[0088] In step S44, it is determined whether or not the display of the recorded image is completed. If not completed, the process returns to step S43. If the display is completed, the process proceeds to step S15.

[0089] [Effect of Example]

(1) This doorscope camera can be easily attached to the currently installed doorscope. At this time, it is not necessary to substantially modify the existing door and door scope.

(2) This door scope camera can be easily attached and detached from the installed door scope. For this reason, it is possible to bring this camera for the door scope when traveling, etc. and install it on the door of a hotel or the like that is temporarily stagnant.

[0091] (3) This door scope camera has a memory for storing the shot video, and can confirm its appearance (video) after the visitor leaves. Similarly, even when going out

, You can see the visitor's appearance (video) after returning home. [0092] (4) Since a sound trigger is used, if a sound of a predetermined level or more is generated by door chimes, door knocks, etc., the door scope camera automatically starts and displays an image. Images can be stored in memory.

[0093] (5) Since the camera body is temporarily activated by a sound trigger, the battery life can be kept long. That is, the CCD / CMOS image sensor described in this embodiment, SDRA

When M, LCD, etc. are used, the battery life of rechargeable nickel metal hydride batteries, alkaline batteries, etc. can be expected to be about one year.

(6) The user can display the outdoor state on the display device at any time by pressing the manual mode switch 62. If desired, outdoor video can be recorded in the image memory 28.

[0095] (7) As the imaging device, for example, a CCD / CMOS image sensor 16 having about 1.3 million pixels is used, so that a clear image can be obtained even if the central region of the image data is enlarged and visualized. Power S can be.

[0096] (8) By preparing a conversion table, it is possible to correct a wide-angle image from a door scope using a fisheye lens into an image without distortion and obtain an appropriate image.

(9) By preparing a conversion table, it is possible to correct the image without distortion and further enlarge the central region to obtain an image that is easy to view.

(10) By preparing various conversion tables, the image obtained from the door scope can be zoomed or the image in a predetermined direction can be enlarged.

(11) For example, the address conversion table used in the fish-eye correction means 24 is a replaceable memory such as a memory stick or a memory card, and the type of wide-angle lens, the degree of zooming, and the image displayed on the display device Various preparations can be prepared and used depending on the part. After attaching the doorscope camera to the door, you can change the memory to make the fisheye correction method best suited for that door.

[0100] (12) Currently, many doors have door scopes installed. A fisheye lens is used for this door scope. Based on such a current situation, the door scope camera 10 captures a wide-angle image obtained through a fish-eye lens, corrects it to an appropriate image, and displays it. Further, the center area of this corrected image is enlarged and processed. [0101] On the other hand, a general digital camera obtains a proper image by photographing a subject (actual object) as it is, and obtains a wide-angle image using a fish-eye lens if desired.

[0102] Therefore, the door scope camera 10 that performs processing such as correcting and enlarging a wide-angle image to an appropriate image and a general digital camera have different configurations and functions due to differences in the purpose of use.

[0103] [Modifications, etc.]

Although the embodiments of the door scope camera according to the present invention have been described, these are merely examples, and the present invention is not limited to these embodiments. The present invention includes a force, deletion, change, etc. that can be easily made by those skilled in the art.

[0104] When the door scope camera according to the present invention is installed, for example, on a door at home, a still image transmission device or a moving image transmission device is additionally provided as an additional device, and an image captured by the door scope camera. Alternatively, the video stored in the memory may be transmitted to a mobile phone or a PC (personal computer) in real time or at a desired time via a mobile phone line or an Internet line. By providing a still image or moving image transmission device, it is possible to check the visitors when they are absent in real time or at a desired time.

[0105] The technical scope of the present invention is defined by the description of the appended claims.

Claims

The scope of the claims

[1] A door scope camera that is detachably installed on the indoor side of a door where a door scope is installed, and corrects a wide-angle image of the outdoor side of the door scope and displays it on a display device.

[2] In the door scope camera according to claim 1,

A camera for doscope, comprising a memory, and recording a wide-angle image of the outdoor side from the door scope in the memory.

[3] A doorscope camera that can be removed directly from the doorscope.

An imaging means for photographing the state of the outdoor side through the door scope;

Correction means for correcting a wide-angle image from the imaging means;

A door scope camera, comprising: a display device configured to display an image corrected by the correction unit, and displaying the wide-angle image as an appropriate image.

[4] In the door scope camera according to claim 3,

The door scope camera, wherein the correcting means enlarges the central region of the wide-angle image.

[5] In the door scope camera according to claim 3,

The door scope camera, wherein the correction means has an address conversion table for converting the address of the wide-angle image into the address of an appropriate image.

[6] In the door scope camera according to claim 5,

The address conversion table is stored in a replaceable memory, and is a door scope power camera.

[7] In the door scope camera according to claim 3,

A door scope camera that has sound trigger means and activates the camera body in response to sound above a certain level.

[8] In the door scope camera according to claim 3,

A door scope camera that has manual mode means and displays the outdoor state on the display device when the manual mode switch is pressed.

[9] In the door scope camera according to claim 3,

For door scopes, which has an image memory and records the image corrected by the correcting means camera.

[10] The door scope camera according to claim 3, further comprising:

A door scope camera comprising an image memory and recording the image corrected by the correcting means as a still image.

[11] In the door scope camera according to claim 3,

A door scope camera comprising an image memory and recording the image corrected by the correcting means as a moving image.

[12] In the door scope camera according to claim 3,

A door scope camera that includes recorded image reading means and reads a video that has already been recorded in an image memory and displays it on a display device.

[13] The door scope camera according to claim 3, further comprising:

A camera for door scopes equipped with focusing means.

[14] In the door scope camera according to claim 3,

A door scope camera that includes mode switching means and switches between a setting mode, a trigger mode by sound, a manual mode, and a recorded image readout mode.