JP2000101905A - Image pickup device with installation position detecting function, installing position detection method for image pickup device and medium with program for detecting installing position of image pickup device recorded therein - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust the installing position of an image pickup device without showing the image that is photographed by the image pickup device on an image display device nor making a person confirm the photographed image. SOLUTION: An image input means photographs an object to acquire its image (step P1), and the photographed image of a specific object is discriminated from other photographed images based on the image that is acquired in the image input step (P2). Then it is decided whether the object is photographed in a desired range (P3). The ratio of the specific object image occupying on the photographed images is detected (P311), and accordingly it is can be decided that the specific object image is not out of the photographed images (P312). Then the photographed images are divided into plural areas, and the rate of the specific object image occupying in every divided area is detected (P321) so that it can be decided, as to the degree of dislocation of the specific object image from the photographed image in each area (P322). Based on this detected rate, it is decided that the image pickup device is picking up images of the object for photographing, from a prescribed position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image pickup device used as an input device of an image processing device, which is installed so as to pick up an image in a predetermined range. By processing, it is determined whether or not the image is within the imaging range from the correct installation position, and the human does not look at the image displayed on the screen, and based on the determination result, the user can set the image imaging position. The present invention relates to an image capturing apparatus having an installation position detecting function capable of determining a position, an installation position detecting method of the image capturing apparatus, and a medium recording a program for detecting an installation position of the image capturing apparatus.

[0002]

2. Description of the Related Art When an image pickup apparatus (TV camera) is installed to pick up an image in a specific range, an image picked up by the image pickup apparatus is displayed on an image display device, and a person checks the image while checking the image. The installation position such as the direction of the imaging device was adjusted.

[0003]

The problem to be solved by the present invention is that when a specific range is imaged by an image pickup device, the image picked up by the image pickup device is not displayed on an image display device, and , An image pickup device with an installation position detection function that allows a person to adjust the installation position such as the orientation of the image pickup device without confirming the image, an installation position detection method of the image pickup device, and an installation position of the image pickup device To provide a medium on which is recorded a program for detecting an error.

[0004]

According to the present invention, there is provided an image pickup apparatus having an installation position detecting function according to the present invention.
An image input unit that captures an image of an image to be captured, and an image of the specific object and other images are distinguished from an image obtained from the image input unit, and the image input unit captures an image of the image capturing target in a desired range using the image of the specific object. Image determination means for determining that the image is being processed.

In the above, the image judging means detects the ratio of the image of the specific object in the captured image, and judges that the image input means is picking up the photographing target from a predetermined position according to the magnitude of the ratio. So that you can
The image determining unit divides the captured image into a plurality of regions, detects a ratio of the image of the specific object in each region, and, based on the ratio, the image input unit captures an image of the imaging target from a predetermined position. May be determined.

Further, according to the present invention, there is provided a method for detecting an installation position of an image pickup apparatus, comprising: an image input step of capturing an image of an object to be captured by an image input means; and an image of a specific object from an image obtained from the image input step. And an image judging step of judging whether the photographing target is imaged in a desired range.

Further, the medium on which the program for detecting the installation position of the image pickup device according to the present invention is recorded is a medium on which a program for detecting the installation position of the image pickup device by a computer is recorded, and An image input step of capturing an image by an image input unit, and an image determination step of distinguishing an image of a specific object from other images based on an image obtained from the image input step, and determining whether an imaging target is captured in a desired range. And a program for executing the steps and detecting the installation position of the image pickup apparatus.

[0008]

The operation of the image pickup device with the installation position detecting function is performed as follows. The image to be photographed is photographed by the image input means. The image determining means distinguishes the image of the specific object from the other images from the image obtained from the image input means, and determines that the image capturing means has captured the object to be photographed in a desired range by the image input means. .

At this time, the image determining means can determine whether or not the image of the specific object deviates from the captured image by detecting the ratio of the image of the specific object in the captured image. Then, it is determined from the magnitude of the ratio that the image input means is capturing an image of the imaging target from a predetermined position.

Further, at this time, the image judging means divides the captured image into a plurality of regions and detects the ratio of the image of the specific object in each region, so that the image of the specific object is displayed on the captured image of each region. Can be determined. Then, it is determined from the magnitude of the ratio that the image input means is capturing an image of the imaging target from a predetermined position.

In the method of detecting the installation position of the image pickup device, the following operation is performed. In the image input step, the image input means captures an image of a capturing target and obtains the image. In the image determining step, the image of the specific object and other images are distinguished from the image obtained from the image input step, and it is determined whether or not the imaging target is imaged in a desired range.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is an example of a functional block diagram of an image capturing apparatus with an installation position detection function. In FIG. 2, reference numeral 1 denotes an imaging device (solid-state imaging device) as an image input unit, which constitutes a part of an image imaging device. 2 is a RAM for storing image data captured by the imaging device 1
And has a capacity for at least one screen, and associates each address with the position of one pixel on one screen. 3 is RAM
A ROM that stores a program for performing image processing based on the data of 2 and is configured by an LSI, and 4 is a processing device that performs image processing based on the program of the ROM 3 and constitutes a part of a computer and includes an MPU or a CPU. . 5 is a bus. In addition, the image pickup apparatus further includes an optical element system including a lens (not shown), a case for housing the optical element system, and the like, and a television camera is typical.

FIG. 3 is a diagram showing an example of the arrangement of each unit when an image of the object to be imaged, for example, the ground, is photographed by using the above-mentioned image imaging apparatus. FIG. 4 is an example of an image captured according to the example of FIG. In FIG. 3, reference numeral 6 denotes an image pickup device, which is provided, for example, by an attachment member (not shown) above the inside of a parking lot, 7 is the ground, 8 is a sidewalk, and 9 is white as a specific object placed on the ground 7 Reference numeral 10 denotes a lamp which is turned on upon receiving an output signal under the control of the processing device 4 of the image pickup device 6. 4 are the same as those in FIG.

A description will be given of a case where the image pickup device 6 is installed in a correct direction so that the white plate 9 is located at the center of the screen when the image of the ground 7 is taken and displayed on the display device. FIG. 1 is a flowchart illustrating a method for detecting the installation position of the image pickup device. The image pickup device 1 of the image pickup device 6 picks up an image of the ground 7, the sidewalk 8, and the white plate 9 (FIG. 1A).
Step P1). The processing device 4 distinguishes the image of the white plate 9 from other images based on the program recorded in the ROM 3 (step P2 in FIG. 1A). For example, the ROM 3 corresponding to one pixel on the screen, that is, one pixel of the captured image
If the luminance signal of each pixel of the captured image or a signal level corresponding thereto is equal to or more than a certain value for each address of the corresponding image, the pixel is determined to be white, and a pixel that does not reach the certain value is not white, that is, Each pixel is determined to be white (image of the white plate 9) and non-white (image of the ground 7 or the sidewalk 8) as pixels of the image of the specific object. Then, based on the captured image of the white portion, it is determined that the imaging device 1 has captured the ground 7 in a desired range (step P in FIG. 1A).
3).

Step P3 will be further described with reference to FIG. After distinguishing the image of the white plate 9 from the other images in step P2 of FIG. 1A, the ratio of the total number of pixels corresponding to the white portion to the number of pixels of one screen is obtained (FIG. 1B). Step P311). Next, the processing device 4 determines whether the ratio of the image of the white portion to the captured image is a predetermined size (step P312 in FIG. 1B). At this time, if there is a portion of the captured image of the white plate 9 that is off the screen, the ratio of the white image is reduced, and the imaging device 1 does not image the ground 7 in a predetermined direction. Since the ratio of the white image is not the predetermined size, the processing device 4 returns to step P311 without performing the control to turn on the lamp 10, and detects the ratio of the newly occupied image of the white portion on the captured image. . On the other hand, since the installation worker does not turn on the lamp 10, the imaging device 1
Then, the user knows that the white plate 9 has not been imaged in a desired range, and adjusts a mounting member (not shown) to change the direction of the image capturing device 6. After step P311, the processing device 4 sets
Further, in step P312, it is determined again whether the ratio of the image of the white portion to the captured image is a predetermined size. When the ratio of the white portion is a predetermined size, the processing device 4 controls to turn on the lamp 10. The mounting operator knows that the adjustment for changing the direction of the image pickup device 6 has been correctly performed by turning on the lamp 10. On the other hand, when the ratio of the white portion is not the predetermined size, the process returns to step P311 and the processing device 4 performs a new ratio detection. In this way, the installation operator can view the image pickup device 6 without watching the display on the image display device.
It is possible to set the position such as the direction correctly. By adjusting the image of the white plate 9 so that the image of the white plate 9 is enlarged so as to largely occupy the captured image by using the zoom function, even if the image capturing device 6 is slightly displaced, the portion of the white plate 9 deviates from the captured image, and is correct. The direction range of the position is narrowed, and accurate adjustment can be performed accurately. Then, by reducing the size by the zoom function, the ground 7 can be imaged in the operation state.

Another example of the above step P3 is shown in FIG.
This will be described with reference to (c). In step P2 of FIG.
After distinguishing the image of the white plate 9 from the other images, FIG.
In step P321 of (c), the captured image for one screen is divided into a plurality of predetermined regions, and the ratio of the image of the specific object in each region is detected. FIG. 5 shows a case of dividing into four equal parts, for example. When the imaging device 1 images the ground 7 in a correct predetermined direction, the ratio of the white image in each region should be within a predetermined range. For example, as shown by a solid line in FIG. 5, when the white board image I9 is located at the center of the screen, the occupation ratios of the white portions in the respective regions are equal to m. When the imaging direction of the imaging device 1 is shifted and the white board image I9 'is located off the center as shown by the broken line, the occupation ratio of the white board image I9' in each region is larger or smaller than the occupation ratio m. Deviate. Step P
At 322, the processing device 4 determines whether the ratio of the white portion image in each region on the captured image is within a predetermined range. This predetermined range is set to, for example, m ± ε (ε
Is determined within a practically usable range. ). At this time, if the captured image of the white plate 9 is off the center, the occupation ratio in each region is not within the range of m ± ε, and the imaging device 1 does not image the ground 7 in a predetermined direction. .
The processing device 4 obtains the ratio of the image of the white plate 9 from each area,
If even one of these is not within the predetermined range, the lamp 10
Without performing the control to turn on, the process returns to Step P321 to newly detect the ratio of the image of the white portion in each area to each area on the captured image. On the other hand, the installation worker
Since 0 does not light, the imaging device 1 knows that the ground 7 and the white plate 9 are not imaged in a desired range, and adjusts a mounting member (not shown) to change the direction of the image imaging device 6. After Step P321, the processing device 4 determines again in Step P322 whether or not the ratio of the white portion image in each region on the captured image is within a predetermined range. When the ratio of the white portion is within the predetermined range in all the regions, the processing device 4 controls to turn on the lamp 10. The mounting operator knows that the adjustment for changing the direction of the image capturing device 6 has been correctly performed by turning on the lamp 10. On the other hand, when the ratio of the white portion is not within the predetermined range in at least one region, the process returns to step P321, and the processing device 4 performs a new ratio detection. In this way, the installation operator can correctly set the position such as the direction of the image pickup device 6 without watching the display on the image display device. Without giving a zoom function to the image pickup device, it is possible to adjust the photographed object in a wide range while taking the image, and the image pickup device 6
Even a slight misalignment reduces the direction range in which the position is determined to be correct, and allows accurate and precise adjustment.

Although the specific object described in the above example is a white plate, if the ground is painted with a color close to white, the specific object is distinguished from other objects by a different color, for example, black. I do.

The method described with reference to FIG. 1 is executed by the processing device 4 constituting the computer as described above. This execution program is recorded in the ROM 3, and this LSI
In addition to the above-described semiconductor medium, the program may be recorded on a medium such as a hard disk, a floppy disk, a CD-ROM, and an MO disk, and the execution program data can be stored, copied, and distributed.

[0019]

As described above in detail, according to the present invention, since the image pickup apparatus itself determines whether or not the image pickup apparatus is correctly photographing the object to be photographed, the image pickup apparatus is used for image pickup. It is possible to adjust the installation position such as the orientation of the image capturing device without displaying the image on the image display device and without visually confirming the image, and to capture a specific range with the image capturing device. Can be. Further, an image display device for confirmation is not required.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a method for detecting an installation position of an image capturing apparatus.

FIG. 2 is an example of a functional block diagram according to an image capturing apparatus with an installation position detection function.

FIG. 3 is a diagram illustrating an example of an arrangement in a case where an image capturing target is captured using an image capturing apparatus.

FIG. 4 is an example of a captured image.

FIG. 5 is a diagram illustrating an image of a specific object on a captured image divided into a plurality of regions.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Image pick-up device (image input means), 2 ... RAM, 3 ...
ROM, 4 processing unit, 5 bus, 6 imaging device,
7: ground, 8: sidewalk, 9: white board (specific object), 1
0 ... lamp.

Claims (5)

[Claims] An image input means for photographing an image of an object to be photographed, and an image of a specific object and other images are distinguished from an image obtained from the image input means. An image pickup apparatus with an installation position detection function, comprising: an image determination unit that determines that an image is captured in a desired range. 2. An image determination unit detects a ratio of an image of a specific object in a captured image, and determines that the image input unit is capturing an image of a shooting target from a predetermined position based on the ratio of the ratio. The image pickup apparatus with an installation position detection function according to claim 1, wherein 3. An image determining unit divides a captured image into a plurality of regions, detects a ratio of an image of a specific object in each region, and, based on the ratio, the image input unit determines a position of a photographing target at a predetermined position. 2. The image pickup apparatus with an installation position detection function according to claim 1, wherein it is determined that the image is picked up from. 4. An image input step of capturing an image of an object to be captured by an image input means, and an image of a specific object and other images are distinguished from an image obtained from the image input step, so that the image of the object to be captured is captured in a desired range. An image determining step of determining whether or not the installation has been performed. 5. A medium on which a program for detecting the installation position of an image pickup device by a computer is recorded,
An image input step of capturing an image of an object to be captured by an image input unit, and distinguishing an image of a specific object from other images based on an image obtained from the image input step, and determining whether the image of the object is captured in a desired range. A program for executing an image determination step to detect an installation position of the image capturing apparatus.