JPH0630416A - Video doorphone with display expanding function - Google Patents

Abstract

PURPOSE:To expansively display a visitor's face on a monitor by judging the head position of the visitor from a moving area within a prescribed time from a calling switch operation and specifying an extracted expansive area obtained from image data. CONSTITUTION:A moving area extracting part 26 computes a difference between the image data of a preceding frame read out from an input side image memory 22 and the data of a current frame inputted from an A/D converter 21 and extracts a moving area. A moving object position detecting part 27 detects the position of a moving object based upon the moving area information extracted by the extracting part 26 and an extraction area to be expanded is determined through an expanding position judging part 28 and applied to an expansive conversion part 23. The conversion part 23 extracts and expands image from the memory 22 and a D/A converter 25 converts the expanded data through an output side image memory 24 and sends the converted data to a video doorphone master set monitor as an output video signal Sout. Even when a visitor does not stand just in front of a camera part, his (or her) head position is extracted and expanded and the expanded image can be displayed on the center of the monitor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention According to the present invention, a slave unit installed near a door of a house and a master unit installed indoors are electrically connected, and a visitor operates the slave unit to call the master unit. A sound is generated to enable a call between the child device and the parent device, and the appearance of the visitor photographed on the child device side can be displayed and confirmed on the parent device side, and in particular the visitor confirmation The present invention relates to a TV door phone with a display enlarging function, which is configured so as to be capable of enlarging and displaying a portion necessary for clearly performing the above.

[0002]

2. Description of the Related Art A TV door phone has one of the functions of shooting an outdoor image with a camera, and a TV door phone having a camera unit is installed at a front door or a gatepost. However, it is not always installed under the condition that the visitor is in front of the TV doorphone handset, because it varies depending on the living conditions and user's wishes. In addition, the visitor may change the position after operating the child device.

Therefore, there is a measure to adjust the mounting angle of the camera unit in the TV intercom slave unit at the time of installation, or to change the image pickup angle of the camera unit by a remote control by a motor or the like. It is conceivable, but in general, a wide-angle lens is used as the lens of the camera section to widen the field of view so that visitors can easily enter the field of view.

However, in a TV door phone using a wide-angle lens in the camera section, the viewing angle is widened, but the area in which the visitor is reflected is small, so that a necessary portion of the image taken is taken. By making a selection and enlarging and displaying the selected area, it is devised to make it easy to check the visitors.

The present applicant has proposed a conventional example in which such measures have already been taken as Japanese Patent Laid-Open No. 2-114786. Hereinafter, this conventional technique will be described with reference to FIG.

The input video signal S _IN photographed by the camera unit of the TV intercom slave is converted into digital image data by the A / D converter 1 and stored in the input side image memory 2. The image data stored in the input side image memory 2 is read in a state in which a part of the image is extracted and enlarged and converted by a method such as controlling the read timing of the memory contents by the enlargement conversion unit 3, and the enlarged image is read. The data is stored in the output side image memory 4. The enlarged image data read from the output side image memory 4 is output as an analog output video signal S _OUT by the D / A converter 5 and displayed on the monitor of the TV doorphone master unit.

The extraction area expanded by the expansion conversion unit 3 in the image data of the input side image memory 2 is the user (resident).
Is selected based on the operation of the enlarged display position selection switch 6 provided in the TV doorphone master unit.

[0008] For example, the visitor's head (face) may be because the visitor has moved or the visitor's height is considerably high.
May not be located exactly in the center of the front of the camera part of the TV doorphone handset, or even if it is located in the center of the front, it may be far away and the image size of the head may be small. When the confirmation of the visitor is unclear, the user selects and specifies the position on the screen corresponding to the visitor's head by manual operation of the enlarged display position selection switch 6 so that the visitor's head can be easily seen. It is enlarged and displayed.

As another conventional example, a method of detecting the head position of a visitor on the basis of movement in an image, and automatically enlarging and converting an area including the detected head position as an extraction area to be enlarged. TV intercom is proposed. For example, THPM14.5 “AUTOMATIC VIEWING RANGE TRAC
ING METHOD FOR COMMUNICATION EQUIPMENT ”(CH2978-5 / 91 / 0000-0)
204 $ 1.00 1991 IEEE). Less than,
This conventional technique will be described with reference to FIG.

In the figure, 11 is an A / D converter, 12 is an input side image memory, 13 is an enlargement conversion section, 14 is an output side image memory, 15 is a D / A converter, 16 is a moving area extraction section,
Reference numeral 17 is a moving body position detection unit, S _IN is an input video signal, S _OUT
Is an output video signal.

The input video signal S _IN photographed by the camera unit of the TV intercom slave is converted into digital image data by the A / D converter 11 and stored in the input side image memory 12,
A part of the image is extracted from the input-side image memory 12 by controlling the read timing in the expansion-conversion unit 13 and read so as to be expanded-converted, and the expanded-image data is stored in the output-side image memory 14, and the output-side image memory 14 is stored. Image memory 1
The enlarged image data read from 4 is converted into an analog output video signal S _OUT by the D / A converter 15 and displayed on the monitor of the TV doorphone master unit.

The moving area extracting unit 16 is provided in the input side image memory 1
The moving area is extracted by calculating the difference between the image data of the previous frame read from 2 and the image data of the current frame input from the A / D converter 11. The moving object position detection unit 17 detects the position of the moving object (the head position of the visitor) based on the moving area information input from the moving area extraction unit 16, and the extraction that should be expanded based on the detected moving object position information. A region is determined and this is given to the enlargement conversion unit 13 as enlargement extraction region information. The enlargement conversion unit 13 extracts the image data of the portion including the moving object from the input side image memory 12 based on the given enlargement extraction area information, enlarges it, and transfers and stores it in the output side image memory 14.

By such processing, for example, as shown in the left screen of FIG. 13, even if the visitor is not in front of the camera unit of the TV intercom handset but at the end, the head position of the visitor is set. Can be extracted and enlarged, and the head of the visitor can be automatically and correctly projected on the monitor of the TV intercom base unit as shown on the right side screen.

[0014]

However, in the case of the conventional example shown in FIG. 11, an enlarged display is performed when the head (face) of the visitor is enlarged so that it can be easily confirmed while looking at the monitor screen of the TV intercom base unit. Position selection switch 6
Has to be operated manually, which is quite a hassle for the user. In particular, it is very difficult for an old person, a child, or a person who is vulnerable to mecha.

Further, in the case of the conventional example of FIG. 12, the moving object position detecting unit 17 regards the moving area extracted by the moving area extracting unit 16 as an area including the head of the visitor.
As shown in the left-hand side screen of FIG. 14, within a certain period of time from the moment when the visitor presses the call switch of the TV intercom handset, the movement of the arm or hand is emphasized and displayed on the camera unit. The moving object position detection unit 17 erroneously determines the arm portion as the visitor's head, and as a result of extracting and enlarging the arm portion as shown on the right side screen, the head protrudes from the screen,
There was a risk of not knowing who the visitors were.

Further, in the case of the conventional example of FIG. 12, regardless of the state of the visitor, the visitor's head (face)
Since the region of the moving object detected as is always extracted and enlarged, when the visitor's condition is normal on the input side image memory 2, the output side image is forcibly enlarged. There is a problem that it becomes an inconvenient state on the memory 4.

That is, as shown in the left side screen of FIG. 15 (a), for example, even when the visitor is displayed in an appropriate size in front of the camera unit, the forced expansion causes the right side screen to appear. Since it is enlarged too much, it becomes difficult to distinguish visitors.

Further, as shown in the left side screen of FIG. 15B, when there are a plurality of visitors, only one person is displayed as in the right side screen due to forced expansion, and the correct number of visitors is unknown. However, there was a drawback that all visitors could not be recognized correctly. Further, since only a part of the image is displayed, there is a disadvantage that the user in the room may not be able to confirm the visitor who is the current call target with the image.

The present invention was devised in view of the above circumstances, and the user has to carry out a troublesome manual operation for selecting an area to be extracted and enlarged as in the conventional example shown in FIG. The first purpose is to make it unnecessary. Further, as in the conventional example of FIG. 12, the inflexibility of forcibly expanding any moving object is eliminated, and the screen processing when the call switch is operated by the visitor is optimized to make the erroneous determination as in the conventional example. The second purpose is to prevent A third object is to enable proper screen display in consideration of factors such as the head size and the number of visitors on the screen.

[0020]

Means for Solving the Problems [1] First Aspect of the Present Invention
The TV intercom with the display enlargement function of is that the image data obtained by the camera part of the TV intercom slave is temporarily stored in the image memory, the moving area on the image data is extracted, and the enlarged image is displayed on the TV intercom master unit. A TV intercom with a display enlarging function configured to be displayed on a monitor of the TV, and timer means for counting the elapsed time after the call switch of the TV intercom slave is operated, and this timer means counting up a predetermined time. Until then, an arm movement area determination means that uses the movement area extracted from the image data as an arm movement area, a means that determines the visitor head position from the arm movement area, and the visitor head from the image data. Means for extracting and enlarging an area including a position.

[2] A second TV doorphone with a display enlarging function according to the present invention temporarily stores image data obtained by a camera unit of a TV doorphone slave unit in an image memory, and a moving area on the image data. A TV doorphone with a display magnifying function configured to extract and magnify an image on the monitor of the TV doorphone master unit, which is a timer that counts the time elapsed since the call switch of the TV doorphone slave unit was operated. Means and means for causing the monitor to output the same image data as the image data by the camera section until the timer means counts up a predetermined time until the extraction and enlargement process is temporarily stopped. It is characterized by that.

[3] According to a third aspect of the present invention, which is a TV doorphone with a display enlarging function, image data obtained by a camera unit of a TV doorphone slave unit is temporarily stored in an image memory, and a moving area on the image data is stored. A TV doorphone with a display magnifying function configured to extract and magnify an image on the monitor of the TV doorphone master unit, which is a timer that counts the time elapsed since the call switch of the TV doorphone slave unit was operated. Means and means for outputting the monitor to the monitor while holding the expanded position information immediately before the operation of the calling switch by temporarily suspending the processing of the extraction expanded position determination until the timer means counts up the predetermined time. It is characterized by having.

[4] A fourth TV doorphone with a display enlarging function according to the present invention temporarily stores image data obtained by a camera unit of a TV doorphone slave unit in an image memory, and a moving area on the image data. A TV doorphone with a display magnifying function configured to extract and magnify an image on the monitor of the TV doorphone master unit, which is a timer that counts the time elapsed since the call switch of the TV doorphone slave unit was operated. Means and the time until the timer means counts up the predetermined time, the image data of the predetermined area where the head of the visitor is estimated to come when the hand of the visitor is on the call switch is displayed. It is characterized in that it is provided with means for extracting and expanding and outputting to a monitor.

[5] According to a fifth aspect of the present invention, which is a TV doorphone with a display enlarging function, image data obtained by a camera unit of a TV doorphone slave unit is temporarily stored in an image memory, and a moving area on the image data is stored. Is a TV doorphone with a display magnifying function configured to display an enlarged image by extracting it on the monitor of the main unit of the TV doorphone, and whether the size of the moving area extracted from the image data exceeds a predetermined value. It is characterized in that it is provided with a judging means and a means for stopping the extraction and expansion of the moving area from the image data and outputting the image data in the same size when it exceeds.

[6] A sixth TV doorphone with a display enlarging function according to the present invention temporarily stores image data obtained by a camera unit of a TV doorphone slave unit in an image memory, and a moving area on the image data. A TV doorphone with a display enlarging function configured to display an enlarged image by extracting the image on the monitor of the TV doorphone master unit, a means for calculating the average brightness of the obtained image data, and the average brightness And a means for stopping the extraction and expansion of the moving area from the image data and outputting the image data in the same size when the value is below the value.

[7] A seventh TV doorphone with a display enlarging function according to the present invention temporarily stores image data obtained by a camera unit of a TV doorphone slave unit in an image memory, and a moving area on the image data. A TV intercom with a display enlarging function configured to display the enlarged and extracted image on the monitor of the TV intercom base unit, and a means for determining whether the number of moving regions extracted from the image data is plural or singular. , A means for stopping the extraction and expansion of the moving area from the image data and outputting the image data in the same size when there are a plurality of them.

[8] An eighth TV doorphone with a display enlarging function according to the present invention temporarily stores image data obtained by a camera unit of a TV doorphone slave unit in an image memory, and a moving area on the image data. A TV doorphone with a display magnifying function configured to display the enlarged and extracted image on the monitor of the TV doorphone master unit, when the number of moving regions extracted from the image data is plural or singular or plural. Further, it is characterized in that it is provided with means for judging the number of the moving areas and means for cyclically extracting and expanding the plurality of extracted moving areas one by one at a predetermined switching cycle and outputting them.

[0028]

[9] A television door phone with a ninth display enlarging function according to the present invention is characterized in that, in the above eighth television door phone, means for varying a switching cycle for a plurality of moving regions is provided.

[10] A tenth TV doorphone with a display enlarging function according to the present invention is the same as the above eighth or ninth TV doorphone, in which the cyclic extraction and enlarging of a plurality of moving regions is stopped. The present invention is characterized in that a means for locking the extraction and expansion state of the moving area is provided.

[11] An eleventh display door intercom with display enlarging function according to the present invention is a means for superimposing the number of extracted moving regions on an enlarged image in any one of the eighth to tenth TV doorphones. It is characterized by having.

[0031]

According to the first TV doorphone with the display enlargement function, the characteristic that the visitor operates the call switch and the movement within a predetermined time after the switch is operated is the movement of the visitor's arm. The motion region extracted from the image data within that predetermined time is used as the arm motion region, the visitor head position is determined from the arm motion region, and the visitor head is determined. Since the image data is extracted and enlarged based on the position of the part, the visitor's head (face) is enlarged and displayed on the monitor in an easily visible state.
Moreover, the above operation is automatically performed.

According to the second TV doorphone with the display enlarging function, the extraction enlarging process is not performed until the predetermined time elapses after the call switch is operated, and the same image data as the image data photographed by the camera unit is used. Is displayed on the monitor, so there is no malfunction such as enlarging and displaying the arms and hands of the visitor.

According to the third TV door phone with display enlarging function, the extraction enlarging position determination processing is not performed until a predetermined time has elapsed after the call switch was operated, and the extraction is performed immediately before the switch is operated. Since the position information is stored, a malfunction such as enlarging and displaying a visitor's arm or hand is eliminated.

According to the fourth TV doorphone with the display enlarging function, the head position estimated when the visitor's hand is on the call switch is maintained until a predetermined time elapses after the call switch is operated. Since it is defined as an extraction area and the image data is enlarged and displayed from that extraction area,
The malfunctions such as enlarging and displaying the arms and hands of the visitor are eliminated.

According to the fifth TV doorphone with display enlarging function, when the visitor is too close to the camera unit,
Since the size of the moving area exceeds a predetermined value and the function of extracting and expanding the moving area from the image data is stopped, the visitor's head (face) is not enlarged excessively.

According to the sixth TV doorphone with a display enlarging function, when there is a possibility that the determination of the moving area is erroneous because the condition of the brightness of the input image is bad, the enlarging and extracting function of the moving area is stopped. , The entire image captured by the camera is displayed on the monitor.

According to the seventh TV door phone with display enlarging function, when a plurality of visitors are shown in the camera section,
Since the number of moving areas becomes plural and the function of extracting and expanding moving areas from image data is stopped, all of the plurality of visitors are displayed on the monitor.

According to the eighth TV doorphone with display enlarging function, when it is determined that there are a plurality of moving areas (visitors), the heads (faces) of the plurality of visitors are sequentially switched one by one. Enlarged display on the monitor.

According to the ninth TV doorphone with display enlarging function, the enlarging display time can be adjusted for each person by changing the cycle of switching in that order.

According to the tenth TV doorphone with display enlarging function, the heads (faces) of a plurality of visitors are sequentially displayed one by one while being enlarged and displayed on the monitor. It becomes possible to lock the state.

According to the eleventh display door intercom with display enlarging function, even if the enlarging display of a plurality of visitors is switched in sequence one by one, the number of those visitors is always displayed on the enlarging screen. It is possible to grasp accurately and easily without counting each person.

[0042]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a TV door phone with a display enlarging function according to the present invention will be described in detail below with reference to the drawings.

First Embodiment FIG. 1 is a block diagram showing the electrical construction of a TV door phone with a display enlarging function according to the first embodiment.

In the figure, S _IN is an input video signal obtained by photographing with a camera unit of a TV intercom slave, 21 is an A / D converter for converting the input video signal S _IN into digital image data, and 22 is An input side image memory that temporarily stores image data, and 23 is a state in which a part of the image is extracted by a method such as controlling the read timing when the image data is read from the input side image memory 22 The conversion unit, 24 is the expansion conversion unit 23
The output side image memory for temporarily storing the enlarged image data by D, and D for converting the image data read from the output side image memory 24 into an analog output video signal S _OUT.
/ A converter. Reference numeral 26 denotes the image data of the previous frame read from the input side image memory 22 and the A / D converter 21.
Based on the moving area information input from the moving area extracting unit 26, the moving area extracting unit that extracts the moving area by calculating the difference from the image data of the current frame input from A moving body position detecting unit for detecting a head position), and 28 is an enlarged position determining unit for determining an extraction region to be enlarged based on the moving body position information input from the moving body position detecting unit 27 and giving it to the enlargement conversion unit 23. is there. The above configuration is almost the same as that of the conventional example of FIG. In addition,
The camera section uses a wide-angle lens to increase the viewing angle.

The input video signal S _IN photographed by the camera unit of the TV intercom slave is converted into digital image data by the A / D converter 21 and stored in the input side image memory 22,
The enlargement conversion unit 23 extracts a part of the image from the input side image memory 22 by controlling the read timing so as to be enlarged and converted, and stores the enlarged image data in the output side image memory 24. Image memory 2
The enlarged image data read from 4 is converted into an analog output video signal S _OUT by the D / A converter 25 and displayed on the monitor of the TV doorphone master unit.

The moving area extraction unit 26 is provided in the input side image memory 2
The moving area is extracted by calculating the difference between the image data of the previous frame read from 2 and the image data of the current frame input from the A / D converter 21. The moving object position detection unit 27 detects the position of the moving object (the head position of the visitor) based on the moving area information input from the moving area extraction unit 26, and the detected moving object position information is the enlarged position determination unit. 28
Give to. The enlargement position determination unit 28 determines the extraction region to be enlarged based on the moving body position information, and supplies this to the enlargement conversion unit 23 as enlargement extraction region information. Enlargement conversion unit 2
3 extracts the image data of the portion including the moving object from the input side image memory 22 based on the given enlargement extraction area information, enlarges it, and transfers and stores it in the output side image memory 24.

Therefore, in principle, even if the image displayed on the monitor of the TV intercom base unit by the output video signal S _OUT read from the output side image memory 24 and converted by the D / A converter 25 is visited, Even if the person is not in front of the camera part of the TV doorphone handset and is at the end, the head position of the visitor is extracted and expanded,
It is possible to project a large image in the approximate center of the monitor.

By the way, in the figure, numeral 29 is provided in the TV intercom slave to cause a visitor to push the TV intercom master to generate a ringing sound and to start the photographing operation of the camera section in the TV intercom slave. Call switch, 30 is call switch 2
A handset call switch detection unit for detecting the ON / OFF state of 9, and a handset call switch detection unit 31
Starts counting when it detects a call-on signal and counts up after a predetermined time elapses. Reference numeral 32 indicates a movement from the moving area extraction unit 26 within the time from the start of the timer 31 until the counting up. Arm motion area determination means for determining the area of the visitor's arm based on the amount of movement, position, size, etc. based on the area information,
Reference numeral 33 is a head position determination means for determining the head position of the visitor based on the arm movement area information from the arm movement area determination means 32. The head position determination means 33 supplies the head position information to the enlarged position determination unit 28 so that the enlargement conversion unit 23 extracts the region to be enlarged from the input side image memory 22 by the enlargement conversion unit 23.
Instead of the determination based on the moving area information from the moving area extraction unit 26, the determination is made based on the head position information.

Next, a specific example of the method of determining the arm movement area by the arm movement area determination means 32 and the head position determination by the head position determination means 33 will be described.

As shown in FIG. 2, when the sum of the moving regions is calculated for each coordinate point on the horizontal coordinate, the magnitude of movement of the moving body, that is, the arm appears as the mountain area amount of the sum. Then, in the case of (a) of the figure, the head position is determined to be the center, in the case of (b) of the figure, the head position is determined to be on the left side, and in the case of (c) of the figure, the head position is determined. It is determined that the position is on the right side.

Alternatively, as shown in FIG. 3, the area to be extracted and expanded is determined according to the direction of change of the movement of the moving body (which direction the moving area of the arm temporally changes in the horizontal direction). To do. In the case of this example, since the moving region is displaced to the right as A ₁ → A ₂ → A ₃ with the passage of time, it is determined that the head position is on the right.

In the above description, only the horizontal direction (horizontal direction) has been described, but the same applies to the vertical direction (vertical direction).

FIG. 4 shows a flowchart relating to the determination of the arm movement region and the determination of the head position. When the call switch 29 is pressed, the arm movement area is obtained, the head position of the visitor is determined, and the extraction / enlargement processing is performed at that position. Therefore, the head (face) of the visitor is appropriate on the monitor. Enlargement display is automatically performed at various positions. The user (resident) does not have to perform a troublesome manual operation.

Second Embodiment FIG. 5 is a block diagram showing the electrical construction of a TV doorphone with a display enlarging function according to the second embodiment. 5, the same reference numerals as those in FIG. 1 according to the first embodiment indicate the same parts or the same means in the second embodiment.

In the figure, reference numeral 34 indicates the moving area extraction unit 26 until the predetermined time elapses immediately after the call switch 29 is pressed, that is, before the timer means 31 times out. It is a moving area extraction processing stopping means for temporarily stopping the moving area extraction processing.

Instead of the moving area extraction processing stopping means 34, the expansion conversion stopping means 35 for temporarily stopping the processing of the extraction and expansion from the input side image memory 22 by the expansion and conversion unit 23 may be used.

When the moving area extraction processing stopping means 34 or the enlargement conversion stopping means 35 operates, the enlargement conversion section 23 does not perform enlargement conversion and transfers the image data of the input side image memory 22 to the output side image memory 24 as it is. Therefore, the image captured by the camera unit as it is is displayed on the monitor of the TV intercom base unit.

Alternatively, the extraction enlargement area non-changing means 36 is used to fix the determination result of the enlargement position determining portion 28 until the timer means 31 counts up, and the timer means 31 is used.
Of the expansion conversion unit 2 using the expansion position information immediately before the start of, that is, immediately before the call switch 29 is pressed.
3, the image data in the input side image memory 22 may be enlarged and converted and stored in the output side image memory 24. The operation in this case is shown in the flowchart of FIG.

Alternatively, the head position estimating means 37 is used to estimate that the visitor's head will come when the visitor's hand is on the call switch 29 until the timer means 31 counts up. The predetermined position information may be provided to the enlarged position determination unit 28, and the extraction and enlargement process from the input side image memory 22 may be performed based on the information.

Whether any of the moving area extraction processing stopping means 34, enlargement conversion stopping means 35, extraction and enlargement area non-changing means 36, and head position estimating means 37 is used, the arm or hand of the visitor explained in FIG. It is possible to eliminate the disadvantage that the portion is erroneously determined to be the head and is enlarged and displayed.

Third Embodiment FIG. 7 is a block diagram showing the electrical construction of a TV doorphone with a display enlarging function according to the third embodiment. In FIG.
The same reference numerals as those in FIG. 1 according to the first embodiment denote the same parts or the same means in the third embodiment.

In the figure, 38 is a moving area size judging means for judging whether or not the size (area) of the moving area extracted by the moving area extracting section 26 exceeds a predetermined value, and 39 is extracted by the moving area extracting section 26. Moving area number judging means for judging whether the number of moving areas is plural or single, 40 is an average brightness calculating means for calculating the average brightness of the input video signal S _IN , 41 is a moving area size judging means 38, moving area number judging means 39 based on the signals from 39 and the average brightness calculation means 40.
ON / OFF to switch between the operating state and the non-operating state
This is an OFF determination unit.

That is, the moving area size determination means 38
When the moving area size is equal to or smaller than the predetermined value, the ON signal is output to the enlargement conversion ON / OFF determination unit 41, but when the size exceeds the predetermined value, the OFF signal is output. Further, the moving region number determination means 39 outputs an ON signal to the expansion conversion ON / OFF determination unit 41 when the number of moving regions is singular, but outputs an OFF signal when there are a plurality of moving regions. Then, the average brightness calculation means 4
0 is ON when the calculated average brightness is equal to or higher than a predetermined value.
The signal is output to the expansion / conversion ON / OFF determination unit 41.
If it is below the predetermined value, an OFF signal is output.

The enlargement conversion ON / OFF determination section 41 is turned on.
When the signal is input, the enlargement conversion unit 23 is controlled to execute the normal extraction and enlargement processing, but when the OFF signal is input, the extraction and enlargement processing is not performed and the image of the input side image memory 22 is not performed. Output side image memory 24
The enlargement conversion unit 23 is controlled so that the data is transferred to. In the latter case, the image captured by the camera unit as it is will be displayed on the monitor of the TV intercom base unit.

The operation of the third embodiment is shown in the flowchart of FIG. According to this embodiment, the head (face) of the visitor is not excessively enlarged as in (a) of FIG. 13 and the number of people is not unknown as in (b). Furthermore, if it is dark at night, such as at night, when the motion area is erroneously determined, extracting and expanding the motion area may make it difficult to see the external appearance as a whole. The entire image taken by the camera is displayed on the monitor.

Fourth Embodiment FIG. 9 is a block diagram showing the electrical construction of a TV door phone with a display enlarging function according to the fourth embodiment. In FIG.
The same reference numerals as those in FIG. 1 according to the first embodiment denote the same parts or the same means in the fourth embodiment. That is, S _IN is an input video signal obtained by photographing a camera unit provided in a TV doorphone slave unit (not shown), S _OUT
Is an output video signal sent to a monitor provided in the TV door phone master unit (not shown), 21 is an A / D converter for converting the input video signal S _IN into digital image data, and 22 is temporarily storing the image data. Input side image memory, 23
Is an expansion conversion unit having a function of extracting a part of an image and performing expansion conversion by controlling a read timing with respect to the input side image memory 22, and a function of simply reading the image without expansion, and 24 is sent from the expansion conversion unit 23. An output side image memory for temporarily storing the received image data, and a D / A converter 25 for converting the image data read from the output side image memory 24 into an analog output video signal S _OUT .

Reference numeral 26 denotes the image data of the previous frame read from the input side image memory 22 and the A / D converter 21.
A moving area extraction unit that extracts a single moving area or a plurality of moving areas by calculating a difference from the image data of the current frame input from the reference numeral 27, and the image should be enlarged based on the moving area information input from the moving area extraction unit 26. It is a moving object position detection unit that detects the position of one or more moving objects (head position of the visitor).

Reference numeral 50 denotes a moving object position storage unit that stores one or more moving object position information pieces obtained by the moving object position detection unit 27, and 51 a motion based on the moving area information extracted by the moving area extracting unit 26. Whether the number of areas is single or plural,
When there are a plurality of moving area number determination means for determining the number,
Reference numeral 52 denotes a moving area number information from the moving area number determining means 51, which is stored with an individual number, and the moving area number information is cyclically switched and sent to the moving object position storage section 50, and at the same time, the moving area is moved. It is a moving object selecting means for sending the number of data to a composite image data creating unit 56 described later. 5
3 is a switching timing control means for sending a switching timing signal of the moving region number information cyclically sent by the moving object selecting means 52 to the moving object selecting means 52, 54 is a switching cycle setting section for setting and inputting a switching cycle, and 55 is This is an enlarged image designation unit for fixing one moving region number information by stopping the cyclic transmission of the moving region number information in the moving object selecting means 52 and setting and inputting the number of the moving region to be enlarged and displayed. 56 is a moving body selecting means 52
A composite image data generation unit (a part of enlarged image data in the output side image memory 24 (data corresponding to a corner of the screen) is generated to generate numeric image data corresponding to the number of moving regions data sent from Character generator).

Information on the single or plural moving regions extracted by the moving region extracting section 26 is sent to the moving body position detecting section 27, and the moving body position detecting section 27 sends the single or plural moving body positions (visitor head). Position) is detected, and the moving body position information is stored in the moving body position storage unit 50. On the other hand, the moving area number determining means 51 determines the number of moving areas based on the moving area information from the moving area extracting unit 26, and sends the moving area number information to the moving object selecting means 52.

The moving object selecting means 52 assigns an individual number to each of a plurality of pieces of moving area number information and stores it as moving area number information. The switching timing control unit 53 sends a switching timing signal to the moving object selection unit 52 at a timing corresponding to the switching cycle set and input by the switching cycle setting unit 54. The moving object selection unit 52 cyclically switches the moving region number information every time a switching timing signal is input, that is, at a constant cycle, and sends the moving region number information to the moving object position storage unit 50. The data of the number of moving regions is sent to the composite image data creation unit 56 and stored.

The moving object position storage unit 50 to which the moving area number information is input from the moving object selecting means 52 corresponds to the moving area number information input from the plurality of moving object position information stored therein. The one moving object position information is searched, and the searched moving object position information is sent to the enlargement conversion unit 23.
Then, the enlargement conversion unit 23 reads out the image data of the corresponding region from the input side image memory 22 based on the input moving object position information, and performs enlargement conversion. Then, the enlarged image data is sent to the output side image memory 24.

On the other hand, the composite image data creating section 56, which receives the data of the number of moving areas from the moving object selecting means 52, creates the numerical image data (numerical character) corresponding to the data of the number of moving areas, and creates the numerical image. The data is sent to the input side image memory 22. As a result, the input side image memory 2
In FIG. 2, with respect to the enlarged image data of the area corresponding to the moving area number information, the numerical image data is stored in the portion corresponding to the corner of the enlarged image data in the overwritten state. The magnified image data containing this numeric image data is D / A
It is converted into an analog output video signal S _OUT by the converter 25, and is displayed on a monitor of a TV door phone master unit (not shown). The display image is an enlarged image of the moving area corresponding to the corresponding moving area number, and the number of visitors is superimposed on the corners of the enlarged image. This means that one of the plurality of moving areas to be enlarged is displayed on the monitor. That is, when there are a plurality of visitors, an enlarged image of the head (face) of one of them is displayed.

Since the switching timing control means 53 sends the switching timing signal to the moving body selecting means 52 at the set switching cycle, the moving body position information sent from the moving body position storage section 50 to the enlargement conversion section 23 is sized. Switching to click, and the enlarged image data transferred to the output side image memory 24 are switched in synchronization. In synchronization with the switching, the numerical image data (this is the same) from the composite image data creation unit 56 is input again to the input side image memory 2.
2 is written to the input side image memory 22 in an overwritten state with respect to the switched enlarged image data. Therefore, the heads (faces) of a plurality of visitors are enlarged and displayed one by one on the monitor. The enlarged display in such an order is cyclically repeated. However, the number of visitors who are superimposed is the same for the same scene. As a result, the exact number of visitors can be known, and enlarged images of each person's head (face) can be sequentially displayed on the monitor for accurate confirmation.

When the user changes the switching cycle by an input operation from the switching cycle setting section 54 in such a cyclically switching state of the enlarged image, the switching timing control means 53 is the switching cycle after the change.
Since the switching timing signal is output from the moving object selecting means 52 to the moving object selecting means 52, the cyclic switching cycle of the enlarged image can be freely changed. That is, the display time of the enlarged image for one person can be adjusted.

Further, when the user inputs the number of the moving area to be continuously displayed in the enlarged image designation section 55, the moving object selecting means 52 stops the cyclic transmission of the moving area number information, and the enlarged image is displayed. It is locked in a state where only the information of one moving area number input from the designating section 55 is transmitted. As a result, the enlarged image of one visitor selected by the user is continuously displayed on the monitor.

The operation of the fourth embodiment is shown in the flowchart of FIG. According to this embodiment, when there are a plurality of visitors, it is possible to accurately grasp the number of the visitors,
An enlarged image of each visitor can be cyclically displayed on the monitor for confirmation. Also, it is possible to adjust the cycle of the cyclic display arbitrarily.
It is also possible to stop the cyclic display and switch to a continuous display state of enlarged images of a specific person desired.

As for the method for detecting the position of the moving object of the present invention, it is conceivable to determine the head position of the visitor by using an object position sensor utilizing infrared light or a laser beam.

[0078]

EFFECTS OF THE INVENTION [1] According to the first TV doorphone with display enlarging function according to the present invention, the moving area within a predetermined time from the operation of the call switch is set as the arm moving area, and the visitor head is moved from the arm moving area. Since it is configured to judge the position and specify the extraction enlargement area from the image data, the visitor's head (face) can be enlarged and displayed at an appropriate position on the monitor. Since it is performed manually, the user (resident) does not have to perform a troublesome manual operation on the side of the TV door phone master unit as in the conventional example, and the burden on the user can be reduced.

[2] According to the second TV doorphone with a display enlarging function of the present invention, the extraction enlarging process is not performed for a predetermined time immediately after the operation of the call switch of the TV doorphone slave unit and the camera unit is not performed. Since it is configured to display the image data itself by the monitor on the monitor, it is possible to prevent the visitor's arm or hand from being misjudged as the head (face) and be displayed in an enlarged size. It can be displayed so that the head can be seen.

[3] According to the third TV doorphone with a display enlarging function of the present invention, the extraction and enlarging position detection processing is not performed for a predetermined time immediately after the operation of the call switch of the TV doorphone slave unit. Since it is configured to display the enlarged position information just before the call switch is operated on the monitor as it is, it is possible to misidentify the visitor's arm or hand as the head (face) and display it enlarged. Although there is a side where the enlargement position is slightly shifted with respect to the movement of the visitor's head (face), an enlarged screen of the visitor's head can be displayed.

[4] According to the fourth TV doorphone with a display enlarging function of the present invention, a visitor who operates the call switch for a predetermined period of time immediately after the operation of the call switch of the TV doorphone handset is operated. Since it is possible to predict the relative positional relationship between the hand and the head, the image data was extracted and expanded in a predetermined area where the head is estimated to come in. It is possible to prevent an erroneous determination as a part (face) from being displayed in an enlarged manner, and it is possible to display an enlarged screen of a visitor's head with a slight deviation.

[5] According to the fifth TV doorphone with a display enlarging function of the present invention, when the visitor is near the camera unit and further enlarging display is not necessary, the size of the moving area is judged. When it exceeds a predetermined value, the extraction and enlargement from the image data is stopped, so the visitor's head (face) is not over-enlarged and displayed properly. It can be displayed in size,
Be able to clearly identify who the visitors are.

[6] According to the sixth TV doorphone with a display enlarging function of the present invention, when the image is entirely dark to the extent that the motion area is erroneously determined, only a specific moving object is enlarged and displayed. Instead, the entire image taken by the camera unit is displayed on the monitor, so that the external state can be grasped more accurately.

[7] According to the seventh TV doorphone with a display enlarging function of the present invention, it is configured to determine whether the visitor is a single visitor or a plurality of visitors, and stop the extraction and enlargement from the image data when there are a plurality of visitors. As a result, it is possible to display all of the multiple visitors and to correctly grasp the number of visitors.

[8] According to the eighth TV doorphone with display enlarging function of the present invention, when it is determined that there are a plurality of visitors, the heads (faces) of the plurality of visitors are sequentially turned one by one. Since it is configured so as to switch the display to the enlarged display on the monitor, it is possible to clearly confirm who each visitor is, even if there are a plurality of visitors.

[0086]

[9] According to the ninth TV doorphone with a display enlarging function of the present invention, the period for switching in sequence for a plurality of visitors can be changed, so that the enlarging and displaying time can be lengthened or shortened for each person. It is possible to improve the usability by arbitrarily adjusting the enlarged display state, such as increasing or decreasing the switching speed, according to the situation of the visitor or the wish of the user (resident).

[10] According to the tenth TV doorphone with a display enlarging function of the present invention, the enlarging display state of a desired one person can be displayed while the enlarging display of a plurality of visitors is sequentially switched. Since it is configured to be lockable, the usability is improved, for example, by selecting the main call partner and enlarging and displaying only that person, and continuing the call.

[11] According to the eleventh display door intercom with display enlarging function of the present invention, even if the enlarging display of a plurality of visitors is sequentially switched one by one, the number of those visitors is always displayed on the enlarging screen. Since it is configured to display, the number of visitors can always be grasped accurately and easily without counting the number of repeated screens one by one.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of a TV door phone with a display enlarging function according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a method of determining an arm movement region and a head position in the first embodiment.

FIG. 3 is an explanatory diagram showing another method of determining an arm motion area and determining a head position in the first embodiment.

FIG. 4 is a flowchart for explaining the operation of the first embodiment.

FIG. 5 is a block diagram showing an electrical configuration of a TV door phone with a display enlarging function according to a second embodiment of the present invention.

FIG. 6 is a flowchart for explaining the operation of the second embodiment.

FIG. 7 is a block diagram showing an electrical configuration of a TV door phone with a display enlarging function according to a third embodiment of the present invention.

FIG. 8 is a flowchart for explaining the operation of the third embodiment.

FIG. 9 is a block diagram showing an electrical configuration of a TV doorphone with a display enlarging function according to a fourth embodiment of the present invention.

FIG. 10 is a flowchart for explaining the operation of the fourth embodiment.

FIG. 11 is a block diagram of a TV door phone with a display enlarging function according to a first conventional example.

FIG. 12 is a block diagram of a TV door phone with a display enlarging function according to a second conventional example.

FIG. 13 is a screen display diagram illustrating forced enlargement according to a second conventional example.

FIG. 14 is a screen display diagram in the case of arm enlargement in the case of the second conventional example.

FIG. 15 is a screen display diagram in the case of overexpansion and in the case of an unknown number of people in the case of the second conventional example.

[Explanation of symbols]

S _IN …… Input video signal S _OUT …… Output video signal 21 …… A / D converter 22 …… Input side image memory 23 …… Enlargement converter 24 …… Output side image memory 25 …… D / A converter 26 ... Motion region extraction unit 27 ... Moving object position detection unit 28 ... Enlargement position determination unit 29 ... Call switch 30 ... Handset call switch detection unit 31 ... Timer means 32 ... Arm movement region determination means 33 ...... Head position determination means 34 ...... moving area extraction processing stopping means 35 …… enlargement conversion stopping means 36 …… extraction expansion area non-changing means 37 …… head position estimating means 38 …… moving area size determining means 39 ・ ・ ・... Moving area number judging means 40 ... Average brightness calculating means 41 ... Enlargement conversion ON / OFF judging section 50 ... Moving object position storage section 51 ... Moving area number judging means 52 ... Moving object selecting means 53 ... Switching Timing control means 54 ...... switching period setting unit 55 ...... enlarged image specifying section 56 ...... synthetic image data generating unit

Claims (11)

[Claims] 1. The image data obtained by the camera unit of the TV intercom slave is temporarily stored in an image memory, and a moving area on the image data is extracted and an enlarged image is displayed on the monitor of the TV intercom master. And a timer means for counting the elapsed time since the call switch of the TV intercom slave is operated, and a time period until the timer means counts up a predetermined time. In the arm movement area determination means for using the movement area extracted from the image data as an arm movement area, means for determining the visitor head position from the arm movement area, and an area including the visitor head position from the image data. A TV door phone with a display enlarging function, which is provided with means for extracting and enlarging. 2. The image data obtained by the camera unit of the TV intercom slave is temporarily stored in an image memory, and a moving area on the image data is extracted to display an enlarged image on the monitor of the TV intercom master. And a timer means for counting the elapsed time since the call switch of the TV intercom slave is operated, and a time period until the timer means counts up a predetermined time. In the above, the TV door phone with a display enlarging function is provided with means for temporarily suspending the process of extracting and enlarging and outputting the same image data as the image data by the camera unit to a monitor. 3. The image data obtained by the camera unit of the TV doorphone handset is temporarily stored in an image memory, and a moving area on the image data is extracted and an enlarged image is displayed on the monitor of the TV doorphone base unit. And a timer means for counting the elapsed time since the call switch of the TV intercom slave is operated, and a time period until the timer means counts up a predetermined time. In the above, the TV door phone with a display enlarging function is provided with a means for temporarily suspending the processing of the extraction enlarging position determination and outputting to the monitor while holding the enlarging position information immediately before the operation of the call switch. 4. The image data obtained by the camera unit of the TV doorphone slave unit is temporarily stored in an image memory, and a moving area on the image data is extracted and an enlarged image is displayed on the monitor of the TV doorphone master unit. And a timer means for counting the elapsed time since the call switch of the TV intercom slave is operated, and a time period until the timer means counts up a predetermined time. In the above, the method is provided with means for extracting and enlarging the image data of a predetermined area where the head of the visitor is estimated to come when the visitor's hand is on the call switch and outputting the image data to the monitor. TV intercom with display magnifying function. 5. The image data obtained by the camera unit of the TV intercom slave is temporarily stored in an image memory, and a moving area on the image data is extracted to display an enlarged image on the monitor of the TV intercom master. And a means for determining whether the size of a moving area extracted from image data exceeds a predetermined value, and a TV doorphone with a display enlarging function configured to A TV intercom with a display enlargement function, which is provided with means for stopping extraction and enlargement of an area and outputting the image data as it is. 6. The image data obtained by the camera section of the TV doorphone slave unit is temporarily stored in an image memory, and a moving area on the image data is extracted to display an enlarged image on the monitor of the TV doorphone master unit. And a means for calculating an average luminance of the obtained image data, and extraction of a moving area from the image data when the average luminance is below a predetermined value. A TV door phone with a display enlarging function, which is provided with means for stopping the enlarging and outputting the image data in the same size. 7. The image data obtained by the camera unit of the TV intercom slave is temporarily stored in an image memory, and a moving area on the image data is extracted to display an enlarged image on the monitor of the TV intercom master. And a means for determining whether the number of moving areas extracted from image data is plural or singular, and a moving area extracting and expanding from the image data when the number is plural. A TV doorphone with a display enlargement function, which is provided with means for stopping the display and outputting the image data in the same size. 8. The image data obtained by the camera section of the TV doorphone slave unit is temporarily stored in an image memory, and a moving area on the image data is extracted and an enlarged image is displayed on the monitor of the TV doorphone master unit. A television door phone with a display enlarging function configured so as to determine whether the number of moving regions extracted from image data is plural or singular, and a means for determining the number when there are plural moving regions, and a plurality of extracted moving regions. And a unit for cyclically extracting, enlarging, and outputting each region in a predetermined switching cycle, the television intercom with a display enlarging function. 9. The TV intercom with a display enlarging function according to claim 8, further comprising means for changing a switching cycle for a plurality of moving regions. 10. The TV door phone with a display enlarging function according to claim 8 or 9, wherein the cyclic extraction and enlargement of a plurality of moving regions is stopped and the extraction and enlargement state of any one moving region is set. A TV door phone with a display enlargement feature, which is equipped with a means for locking. 11. The television door phone with a display enlarging function according to claim 8, further comprising means for superimposing the number of the extracted moving regions on an enlarged image. TV door phone with a display enlargement feature.