JP2010154013A - Camera, object capturing method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and correctly capture an object to reflect the whole object in a frame. <P>SOLUTION: A cellular phone 1 includes this camera 11 having a telescopic function. An object identification part 131 identifies an object to be imaged. A zoom change part 121 changes the magnification ratio of the object to maximize the size, in a frame having a predetermined size, of the object identified by the object identification part 111. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a camera, a subject capturing method, and a program.

  In recent years, digital cameras that can be carried by users have been downsized, and camera functions have been installed in mobile terminals.

  Therefore, the user can carry the camera at any time, and accompanying this, there are many opportunities for photographing various subjects with the camera.

  Most of the above-described digital cameras and cameras mounted on portable terminals have a telephoto function.

  If the subject OBJ is to be enlarged and photographed using this telephoto function, the range that enters the frame of the camera 400 is narrowed as shown in FIG.

  For this reason, if the subject OBJ moves out of the frame due to slight camera 400 shake, it becomes impossible to capture the subject in the telephoto state.

  In this case, it is necessary to once lower the telephoto magnification and capture the subject OBJ again, which causes a trouble of operating the telephoto magnification.

  It is difficult for the user to operate the telephoto magnification and capture the entire subject in the frame and press the shutter.

Therefore, a technique for changing the zoom and focus of the camera so that the image of the subject is included in the frame without any operation by the user is considered (for example, see Patent Document 1).
In the technique disclosed in Patent Document 1, the imaging device (camera) has an initial occupation that is an area ratio between the subject image and the frame at the start time point when the moving image including the subject image is captured. The area ratio is calculated. Thereafter, while the imaging device captures the subject, the subject and the imaging device (camera) are captured while capturing the subject so that the lateral width of the subject image is smaller than a predetermined value for preventing erroneous determination. Measure the distance between. If it is detected that the measured distance has changed, the zoom is changed so that the occupied area ratio, which is the area ratio between the currently captured image and the frame, matches the initial occupied area ratio. .
JP 07-131700 A

  However, even when the technique disclosed in Patent Document 1 is used, when the subject is detached from the frame, there is a problem that the subject cannot be captured so that the subject is reflected in the frame again. .

  An object of the present invention is to provide a camera, a subject capturing method, and a program that solve the above-described problems.

  In order to solve the above-described problems, a camera according to the present invention is a camera having a telephoto function, and includes a subject identifying unit that identifies a subject to be photographed, and a frame having a predetermined size of the subject identified by the subject identifying unit. And a zoom changing unit that changes the magnification of the subject so that the size of the subject is maximized.

  In order to solve the above problems, a subject capturing method of the present invention is a subject capturing method using a camera having a telephoto function, and includes subject identification processing for identifying a subject to be photographed by the camera and subject identification processing. Zoom change processing for changing the magnification of the subject so that the size of the subject identified in the above is maximized within a frame having a predetermined size.

  In addition, a program to be executed by a computer, a camera having a telephoto function, a subject identification procedure for identifying a subject to be photographed, and a size within a frame having a predetermined size of the subject identified by the subject identification procedure. And a zoom change procedure for changing the magnification of the subject so as to maximize.

  According to the present invention, a camera having a telephoto function, after identifying a subject to be photographed, changes the magnification of the subject so that the size of the identified subject within a frame having a predetermined size is maximized. Let

  With such a configuration, the subject can be easily and accurately captured so that the entire subject is reflected in the frame.

(Embodiment 1)
Hereinafter, a camera (including a subject capturing method and a program) according to the first embodiment of the present invention will be described.

  The camera of the present invention may be a digital camera or a camera mounted on a portable terminal (for example, PDA (Personal Digital Assistants)).

  First, a characteristic configuration of the camera of the present invention will be described with reference to FIG.

  As shown in FIG. 1, the camera 11 includes a zoom changing unit 121, a subject identifying unit 131, and a peak detecting unit 132 as its constituent elements.

  The camera 11 captures an image in which the subject OBJ formed on the frame 111 that has passed through a lens (not shown) is reflected.

  The frame 111 of the camera 11 is composed of an arbitrary image sensor. For example, the frame 111 may be a solid-state imaging device such as a CCD (Charge Coupled Device) that generates charges according to the amount of light imaged on the light receiving plane by photoelectric conversion. When the frame 111 is composed of a CCD, the method for transferring the charge generated by the CCD may be any method such as an interline transfer method or a frame transfer method.

  Further, a lens (not shown) included in the camera 11 for forming an image of the subject OBJ on the frame 111 is arbitrary, and may be an optical lens such as a zoom lens, for example.

  Further, as shown in FIG. 2, an out-of-frame detection sensor 112 is provided on the outer periphery of the frame 111. An example of the out-of-frame detection sensor 112 is a CCD.

  The out-of-frame detection sensor 112 transmits an out-of-frame detection signal indicating that the out-of-frame of the subject OBJ has been detected to the zoom changing unit 121 when the subject OBJ identified by the subject identification unit 131 forms an image on the out-of-frame detection sensor 112. Output.

  Here, “out of frame” refers to a state in which the image of the subject OBJ is out of the frame 111.

  When the capture button TRK_BT is pressed, the subject identifying unit 131 shown in FIG. 1 identifies the subject OBJ and captures the subject.

  The zoom changing unit 121 changes the magnification of the camera 11 so that the size of the subject OBJ identified by the subject identifying unit 131 is maximized in the frame 111.

  In the present embodiment, the zoom changing unit 121 maximizes the “subject occupancy ratio” that is the ratio of the area of the subject image to the area of the frame 111 as the size of the subject within the frame. The magnification of the camera 11 is changed.

  More specifically, the zoom changing unit 121 changes the magnification of the image of the subject OBJ by controlling the position of a zoom lens (not shown) included in the camera 11 and performing telephoto control or wide-angle control.

  Here, the telephoto control means that the focal length f, which is a distance from the center of a lens (not shown) of the camera 11 to the image formed by the lens, is relatively long, and the magnification of the subject OBJ is larger than that in the wide-angle state. This refers to the “telephoto state” that is the state. The telephoto state is a state in which the angle of view that can be captured by the camera 11 is small.

  The wide-angle control is a state in which the focal length f from the center of the lens (not shown) of the camera 11 to the image formed by the lens is relatively short, and the magnification of the subject OBJ is smaller than the telephoto state. "Wide-angle state". The wide-angle state is a state in which the angle of view that can be captured by the camera 11 is large.

  The zoom changing unit 121 performs telephoto control for starting the minimum magnification set in advance and expanding the magnification of the camera 11 when the subject identifying unit 131 starts identifying and capturing the subject OBJ. The value for starting the telephoto control may be started from an arbitrary magnification.

  Further, the zoom changing unit 121 determines whether or not the current magnification has reached a preset maximum magnification while performing telephoto control for enlarging the magnification.

  The zoom changing unit 121 ends the telephoto control when the out-of-frame detection sensor 112 detects the out-of-frame of the subject OBJ during the execution of the telephoto control.

  Subsequently, the zoom changing unit 121 starts executing wide-angle control for reducing the magnification of the subject. The zoom changing unit 121 ends the change of the magnification of the subject OBJ when the out-of-frame detection sensor 112 does not detect the out-of-frame of the subject OBJ due to the execution of the wide angle control.

  The peak detection unit 132 calculates the “subject occupation ratio” that is the area ratio of the subject image to the frame 111 while the zoom changing unit 121 enlarges the magnification by the telephoto control, and the peak of the calculated subject occupation ratio is calculated. Detect multiple. Each time the peak detection unit 132 detects a peak of the subject occupation ratio, the peak detection unit 132 writes the peak in the storage unit 14 described later with reference to FIG. The storage unit 14 stores history information in which the peak written by the peak detection unit 132 is associated with the written time.

  Next, the appearance when the mobile phone 1 is viewed from the front will be described.

  As shown in FIG. 3, a camera 11 is attached to the upper part of the casing B of the mobile phone 1. The direction of the camera 11 can be changed manually or electrically.

  Therefore, as shown in FIG. 4, the camera 11 can also have its angle of view (imaging direction) directed toward the side surface of the casing B of the mobile phone 1. As a result, the user can take an image of the subject OBJ existing in the direction of the user's line of sight with the camera 11 even when the user is in the position of the mobile phone 1 in a general call style in which the mobile phone 1 is placed on his / her ear. is there.

  Note that the housing B illustrated in FIG. 3 is provided with a shutter button SH_BT for capturing an image formed on the frame 111 that has passed through the lens.

  The housing B is provided with a capture button TRK_BT. When the capture button TRK_BT is pressed by the user, the camera 11 starts identifying and capturing the subject. The position on the cellular phone 1 where the shutter button SH_BT and the capture button TRK_BT are arranged is not particularly limited.

  The display unit 17 displays arbitrary data including an image in which the subject OBJ captured by the camera 11 is captured.

  In this example, the display unit 17 displays an image formed on the frame 111 by the optical system of the camera 11 so that the user can visually recognize the image formed on the frame 111. Plays the role of finder FDR.

  Next, the circuit configuration of the mobile phone 1 will be described.

  As shown in FIG. 5, in addition to the camera 11, the input unit 16, and the display unit 17, the mobile phone 1 includes a camera control unit 12, an image processing unit 13, a storage unit 14, and a UI (user interface) control unit. 15, a call control unit 18, a communication unit 19, and a voice input / output unit 20.

  The camera control unit 12 includes an imaging unit 122 in addition to the zoom change unit 121 illustrated in FIG.

  When the UI control unit 15 notifies the imaging unit 122 that the user has pressed down the shutter button SH_BT (that is, the shutter has been released), the imaging unit 122 transmits an imaging instruction signal for instructing imaging. Output to.

  Furthermore, the camera control unit 12 converts an analog electrical signal indicating the image of the subject OBJ that has been captured and output by the camera 11 into electronic data of the image of the subject OBJ. Then, the camera control unit 12 writes the image converted into electronic data in the storage unit 14.

  More specifically, the camera control unit 12 outputs an amplifier for controlling the gain, an OB (Optical Black) clamp circuit that determines the black level of the signal output from the amplifier, and the OB clamp circuit. And an analog to digital (AD) converter that converts the analog signal thus generated into a digital signal to generate electronic image data.

  The amplifier is a CDS (correlated double sampling) circuit that extracts an image signal component from an analog electric signal output from the frame 111 (for example, CCD) of the camera 11 or an output signal level of the CDS circuit. Includes an AGC (Automatic Gain Control) circuit for adjusting the gain to a predetermined gain value.

  The image processing unit 13 illustrated in FIG. 5 performs digital processing of an image captured by the camera 11.

  For example, the image processing unit 13 plays a role of executing various digital zoom processes such as a trimming process such as enlargement or clipping of an image captured by the camera 11.

  The image processing unit 13 includes a subject identification unit 131 and a peak detection unit 132.

  When the UI control unit 15 is notified that an input for instructing identification and capture of the subject OBJ is received from the user, the subject identification unit 131 identifies the subject OBJ and captures the subject.

  In this example, the subject identifying unit 131 detects an edge indicating the subject based on a luminance change in an image formed on the frame 111 when notified from the UI control unit 15. The subject identifying unit 131 identifies the subject based on the detected edge. Note that the filter used by the subject identification unit 131 for edge detection may be an arbitrary filter such as a MAX-MIN filter or a Sobel filter, for example.

  Note that the subject identification unit 131 ends capturing of the subject OBJ when notified from the user that the user has received an input to instruct the user to take an image of the subject OBJ.

  The storage unit 14 stores arbitrary data including an image in which the subject OBJ captured by the camera 11 is captured.

  Further, the storage unit 14 stores history information in which the peak written by the peak detection unit 132 is associated with the written time.

  The UI control unit 15 controls the camera control unit 12, the image processing unit 13, the call control unit 18, and the voice input / output unit 20 based on the capture button TRK_BT, the shutter button SH_BT, and an instruction received by the input unit 16. .

  When the shutter button SH_BT is pressed and the UI control unit 15 receives an input for instructing imaging of the subject OBJ imaged on the frame 111 from the user, the UI control unit 15 notifies the camera control unit 12 and the image of the reception. Notify the processing unit 13.

  Further, when the user presses the capture button TRK_BT and receives an input for instructing capture of a subject to be photographed by the camera 11 from the outside, the UI control unit 15 notifies the image processing unit 13 of the acceptance. Notice.

  In addition, when the input unit 16 receives an input for instructing execution of a call from the outside, the UI control unit 15 notifies the image processing unit 13 of the reception.

  The call control unit 18 controls the call operation of the mobile phone 1 when the UI control unit 15 is notified that an input for instructing execution of a call is accepted. More specifically, the call control unit 18 controls the communication unit 19 to transmit and receive radio waves including information associated with the call.

  The communication unit 19 communicates with an arbitrary communication destination. For example, under the control of the call control unit 18, the communication unit 19 performs transmission / reception of radio waves including information accompanying the call with the call destination. The communication unit 19 transmits an image captured by the camera 11 to an arbitrary communication destination.

  The voice input / output unit 20 uses a microphone to output an electrical signal corresponding to the level of any voice input from the outside including the voice of the speaker during a call. In addition, the voice input / output unit 20 outputs an arbitrary voice including the voice of the talker speaker using a speaker.

  Next, an operation in which the mobile phone 1 according to the first embodiment having the above configuration captures a subject will be described with reference to FIGS. 6 and 7.

  7 shows that the subject OBJ imaged on the frame 111 and the out-of-frame detection sensor 112 with respect to the elapsed time while the zoom changing unit 121 is changing the magnification of the subject OBJ captured by the subject identifying unit 131. It is a figure which shows the example of the image reflected.

  As shown in FIG. 6, first, in step 301, the UI control unit 15 determines whether an input for instructing identification and capture of the subject OBJ has been received from the user. When the capture button TRK_BT is pressed and an input for instructing the identification and capture of the subject OBJ is received from the outside, the UI control unit 15 notifies the image processing unit 13 to that effect.

  In step 302, the subject identification unit 131 identifies the subject OBJ. As a method for identifying the subject OBJ, a general method such as detecting an edge indicating the subject OBJ from the image formed on the frame 111 and identifying the subject may be used. Subsequently, the subject identifying unit 131 starts capturing the identified subject OBJ.

  Further, in step 303, the zoom changing unit 121 starts from the minimum magnification set in advance by telephoto control, and expands the magnification of the subject OBJ identified by the subject identifying unit 131.

  In step 304, the peak detection unit 132 calculates a subject occupation ratio that is an area ratio of the subject image to the frame 111 while the zoom change unit 121 performs the telephoto control. Then, the peak is detected from the calculated subject occupation ratio.

  Further, in step 305, the out-of-frame detection sensor 112 detects whether or not the subject OBJ is out of the frame 111.

  When the image of the subject OBJ is not focused on the out-of-frame detection sensor 112 as in the image PIC1 illustrated in FIG. 7, it is not detected that the subject OBJ is out of frame. In this case, in step 306, the zoom changing unit 121 determines whether or not the current magnification has reached a preset maximum magnification.

  If it is determined in step 306 that the current magnification has not reached the preset maximum magnification, the zoom changing unit 121 executes telephoto control so as to further increase the magnification of the subject in step 303.

  On the other hand, as a result of the determination in step 306, when the zoom changing unit 121 determines that the current magnification has reached the preset maximum magnification, the zoom changing unit 121 executes processing in step 310 described later.

  Further, when the image of the subject OBJ is formed on the out-of-frame detection sensor 112 as in the image PIC2 illustrated in FIG. 7, in step 305, the out-of-frame detection sensor 112 detects the out-of-frame of the subject OBJ.

Then, the zoom changing unit 121 ends the telephoto control.
Subsequently, in step 307, the zoom changing unit 121 starts wide-angle control.

  During the execution of the wide angle control by the zoom changing unit 121, in step 308, the out-of-frame detection sensor 112 detects whether or not the subject OBJ is out of the frame 111.

  The zoom changing unit 121 continues to reduce the magnification until the out-of-frame detection sensor 112 detects no out-of-frame of the subject OBJ by the wide-angle control in step 307. That is, the zoom changing unit 121 reduces the magnification of the camera 11 so that the entire subject OBJ is included in the frame 111 again as in the image PIC3 illustrated in FIG.

  In step 308, when the out-of-frame detection sensor 112 does not detect the out-of-frame of the subject OBJ, in step 309, the zoom changing unit 121 ends the magnification change by the wide angle control.

  Thereafter, in step 310, when the shutter button SH_BT is pressed and the user receives an input for instructing imaging of the subject OBJ from the user, the UI control unit 15 notifies the camera control unit 12 and the image processing unit 13 to that effect. Notice. In this case, the subject identifying unit 131 ends capturing the subject OBJ.

  On the other hand, the imaging unit 122 outputs to the camera 11 an imaging instruction signal for instructing imaging. Then, the camera 11 captures an image of the subject OBJ, and the camera control unit 12 converts the image into electronic data and writes it in the storage unit 14.

  The imaging unit 122 is not limited to the case where the UI control unit 15 is notified that the input of the imaging instruction has been received, and the imaging instruction signal is output when the zoom changing unit 121 finishes the wide-angle control after being out of frame. You may output to the camera 11.

  For this reason, it becomes unnecessary for the user to perform an operation of changing the telephoto magnification to repeat the telephoto process and the wide-angle process.

Further, the subject OBJ can be easily and accurately captured so that the entire subject OBJ is reflected in the frame 111. In addition, it is easy for the user to image the subject OBJ in a state in which the maximum amount is reflected in the frame 111.
(Embodiment 2)
Next, the mobile phone 1 according to the second embodiment will be described.

  In the second embodiment, during the telephoto control by the zoom changing unit 121, the subject OBJ is framed based on a comparison between the latest subject occupation ratio peak detected by the peak detection unit 132 and the immediately preceding subject occupation ratio peak. In this example, the largest image is stored in the storage unit 14 as the final image of the subject OBJ.

  The mobile phone 1 according to the second embodiment is different from the configuration illustrated in FIG. 5 in that the mobile phone 1 includes the image deletion unit 123 and the peak identification unit 133 illustrated in FIG.

  In the second embodiment, the zoom changing unit 121 performs the telephoto control when the peak detecting unit 132 detects the peak of the subject occupation ratio while the magnification of the subject OBJ captured by the subject identifying unit 131 is being increased. Pause.

  When the zoom changing unit 121 temporarily stops the telephoto control, the imaging unit 122 outputs an imaging instruction signal to the camera 11. Subsequently, the camera control unit 12 writes the image of the subject OBJ that has been captured and output by the camera 11 in the storage unit 14.

  Thereafter, the zoom changing unit 121 resumes the telephoto control and further enlarges the magnification of the subject OBJ. The zoom changing unit 121 stops the telephoto control again when the peak detecting unit 132 detects the peak of the subject occupation ratio again while the magnification is enlarged.

  Then, the imaging unit 122 outputs an imaging instruction signal to the camera 11. Thereafter, the camera control unit 12 writes the latest image of the subject OBJ captured and output by the camera 11 into the storage unit 14.

  In addition, when the zoom changing unit 121 stops the telephoto control, the peak specifying unit 133 causes the peak of the latest subject occupation ratio detected this time by the peak detection unit 132 and the subject occupation ratio detected immediately before detecting the peak. Compare with the peak.

  And the peak specific | specification part 133 specifies the peak which has a larger value in the comparison.

  As a result of the comparison by the peak specifying unit 133, when the latest peak of the subject occupation ratio is larger than the peak of the previous subject occupation ratio, the image deletion unit 123 is written in the storage unit 14 immediately before the latest image. The image is deleted from the storage unit 14. Thereafter, the zoom changing unit 121 resumes the telephoto control.

  On the other hand, as a result of comparison by the peak specifying unit 133, as shown in FIG. 9, it is assumed that the latest peak of the subject occupation ratio and the peak of the subject occupation ratio detected immediately before have the same value.

  In this case, the image deletion unit 123 stores the image captured when the peak immediately before the latest peak is detected (time t5 in the example of FIG. 9) (time t4). Delete from. In this case, the zoom changing unit 121 ends the telephoto control. That is, in the second embodiment, when the latest peak and the immediately preceding peak have the same value, an image captured at a magnification corresponding to the peak of the latest subject occupation ratio is stored as the final subject image. Stored in the unit 14.

  Note that, as a result of the comparison by the peak specifying unit 133, if the latest peak of the subject occupation ratio is smaller than the peak detected immediately before it, it is arbitrary whether or not the telephoto control by the zoom changing unit 121 is restarted. If the telephoto control is not resumed when the latest peak is smaller than the immediately preceding peak, the image captured at the time of detection of the immediately preceding peak is left in the storage unit 14 as the final subject OBJ image. The deletion unit 123 may delete the image captured when the latest peak is detected from the storage unit 14.

As described above, according to the second embodiment, the risk of camera shake is reduced as compared with the case where the user presses the shutter button SH_BT and images the subject OBJ while suppressing the risk of the subject OBJ being out of frame. It becomes possible.
(Embodiment 3)
Next, the mobile phone 1 of Embodiment 3 will be described.

  In the third embodiment, in addition to the method shown in the second embodiment, an object is to capture an image when the subject OBJ is closest to the user. This is because the image captured when the magnification is small is less likely to be affected by camera shake than the image captured when the magnification is larger.

  The mobile phone 1 according to the third embodiment is different from the configuration shown in FIG. 8 in that it has a magnification detection unit 134 shown in FIG.

  Also in the third embodiment, as in the second embodiment, when the peak detection unit 132 detects the peak of the object occupation ratio during the telephoto control by the zoom change unit 121, the zoom change unit 121 stops the telephoto control. Further, the imaging unit 122 outputs an imaging instruction signal to the camera 11. Then, the camera control unit 12 writes an image at a magnification corresponding to the peak of the subject occupation ratio captured by the camera 11 in the storage unit 14.

  In addition, when the zoom changing unit 121 stops the telephoto control, the peak specifying unit 133 sets the latest subject occupation ratio peak detected by the peak detection unit 132 and the subject occupation ratio peak detected immediately before the latest peak. And compare.

  Further, when detecting the peak of the subject occupation ratio, the peak detection unit 132 according to the third embodiment notifies the magnification detection unit 134 of the detection.

  When the peak detection unit 132 notifies that the peak of the subject occupation ratio has been detected, the magnification detection unit 134 identifies the current magnification and writes the magnification to the storage unit 14. Then, the storage unit 14 stores history information in which the magnification written by the magnification detection unit 134 is further associated with the correspondence between the peak written by the peak detection unit 132 and the written time.

  Further, the magnification detection unit 134 detects the magnification having the smallest value among the magnifications corresponding to the peak detected by the peak detection unit 132 based on the history information stored in the storage unit 14.

  Note that, at the smallest magnification corresponding to the peak, this corresponds to the case where the image of the subject OBJ can be imaged so as to become the maximum within the frame, and the subject OBJ and the camera 11 are closest.

  The image deletion unit 123 according to the third embodiment stores, in the storage unit 14, an image other than an image at a magnification with the smallest value corresponding to the peak of the subject occupation ratio detected by the magnification detection unit 134. 14 to delete.

  In the example shown in FIG. 11, the peak of the subject occupation ratio is the maximum and the magnification of the subject OBJ is the minimum at the imaging time t4 of the image written in the storage unit 14 for the fourth time by the camera control unit 12. ing. In this case, the camera control unit 12 deletes all images from the storage unit 14 except for the image of the subject OBJ, which was captured during the telephoto control and written for the fourth time.

  In the third embodiment, the zoom changing unit 121 starts from the minimum magnification set in advance and controls the telephoto until the out-of-frame detection sensor 112 detects the out-of-frame, similarly to the operation in the first embodiment. May be performed. Then, the magnification detection unit 134 may detect the magnification having the smallest value among the magnifications corresponding to the peak detected by the peak detection unit 132 while the zoom changing unit 121 performs the telephoto control.

  In the present invention, the processing in the camera 11 is recorded on a recording medium that can be read by the camera 11, in addition to the processing realized by the dedicated hardware described above. The program recorded on the recording medium may be read by the camera 11 and executed. The recording medium readable by the camera 11 refers to an HDD or the like built in the camera 11 in addition to a transferable recording medium such as a floppy disk (registered trademark), a magneto-optical disk, a DVD, or a CD. The program recorded on the recording medium is read by, for example, the camera control unit 12 and the image processing unit 13 included in the camera 11, and the same process as described above is controlled by the camera control unit 12 and the image processing unit 13. Is done.

  Here, the camera control unit 12 and the image processing unit 13 included in the camera 11 operate as a computer that executes a program read from a recording medium on which the program is recorded.

  Although the present invention has been described with reference to the embodiment, the present invention is not limited to the above embodiment. Various modifications that can be understood by those skilled in the art can be made to the configuration and details of the present invention without departing from the gist of the present invention.

It is a figure which shows the characteristic structure of the camera according to embodiment of this invention. It is a figure which shows an example of arrangement | positioning with a flame | frame and an off-frame detection sensor. It is a figure which shows an example of an external appearance when the mobile telephone with which the camera according to embodiment of this invention is mounted is seen from the front. It is a figure which shows an example of an external appearance when a mobile telephone is seen from the side. 1 is a diagram illustrating a configuration of a mobile phone according to a first embodiment. 4 is a flowchart illustrating an operation of capturing a subject by the mobile phone according to the first embodiment. It is a figure which shows the example of the image imaged on a flame | frame and an out-of-frame detection sensor, when the camera is acquiring the to-be-photographed object. 6 is a diagram illustrating a configuration of a mobile phone according to Embodiment 2. FIG. It is a figure which shows the to-be-photographed object ratio detected while the camera of Embodiment 2 is capturing the to-be-photographed object. 6 is a diagram illustrating a configuration of a mobile phone according to Embodiment 3. FIG. It is a figure which shows the to-be-photographed object occupation ratio detected while the camera of Embodiment 3 is capturing an object, and the magnification detected while capturing an object. It is a figure which shows the example of the angle of view at the time of a wide angle, and the angle of view at the time of a telephoto by the telephoto function of the camera mounted in the general digital camera and the portable terminal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile phone 11 Camera 111 Frame 112 Out-of-frame detection sensor 12 Camera control part 121 Zoom change part 122 Imaging part 123 Image deletion part 13 Image processing part 131 Subject identification part 132 Peak detection part 133 Peak identification part 134 Magnification detection part 14 Storage part 15 UI control unit 16 input unit 17 display unit 18 call control unit 19 communication unit 20 voice input / output unit

Claims (15)

A camera having a telephoto function,
A subject identifying unit for identifying a subject to be imaged;
And a zoom changing unit that changes the magnification of the subject so that the size of the subject identified by the subject identifying unit is maximized within a frame having a predetermined size. The camera of claim 1,
An out-of-frame detection sensor for detecting that the image of the subject identified by the subject identifying unit is out of the frame;
The zoom changing unit performs telephoto control for enlarging the magnification of the subject identified by the subject identification unit, starting from a preset minimum magnification, and while performing the telephoto control. When the out-of-frame detection sensor detects that the subject is out of the frame, wide-angle control for reducing the magnification is performed, and the out-of-frame detection sensor detects that the subject is out of the frame by the wide-angle control. A camera characterized in that the reduction of the magnification is terminated when it has run out. The camera according to claim 2,
A camera comprising: an imaging unit that captures an image of a subject when an input for instructing imaging of the subject imaged on the frame is received from the outside. The camera according to claim 2,
The ratio of the area of the image of the subject to the area of the frame when the out-of-frame detection sensor does not detect that the frame is out of the frame while the zoom changing unit enlarges the magnification A peak detection unit that calculates the subject occupation ratio as the size and detects a plurality of peaks of the subject occupation ratio;
An imaging unit that captures an image of the subject each time the peak detection unit detects the plurality of peaks;
A storage unit for storing each of the images of the subject imaged by the imaging unit;
A peak identifying unit that identifies the largest peak detected by the peak detecting unit;
Image deletion that deletes images other than the image of the subject imaged when the largest peak identified by the peak identification unit is detected among images captured during the telephoto control stored in the storage unit And a camera. The camera according to claim 4, wherein
While the zoom change unit is performing the telephoto control, the peak detection unit detects the magnification when the peak is detected, and has a magnification detection unit that identifies the smallest magnification among the detection,
The image deletion unit is a magnification detected by the peak detection unit and detected by the magnification detection unit among images captured during the telephoto control stored in the storage unit A camera that deletes an image other than the image of the subject that was picked up. An object capturing method using a camera having a telephoto function,
Subject identification processing for identifying a subject photographed by the camera;
A subject capturing method comprising: a zoom changing process for changing the magnification of the subject so that the size of the subject identified in the subject identifying process is maximized within a frame having a predetermined size. The subject capturing method according to claim 6,
An out-of-frame detection process for detecting that the image of the subject identified in the subject identification process is out of the frame;
In the zoom change process, the telephoto control for enlarging the magnification of the subject identified in the subject identification process is started from the preset minimum magnification and the telephoto control is performed. When it is detected in the out-of-frame detection process that the subject is out of the frame, wide angle control is performed to reduce the magnification, and the wide-angle control causes the subject to be out of the frame in the out-of-frame detection process. A method of capturing an object, wherein the reduction of the magnification is terminated when no more is detected. The subject capturing method according to claim 7,
A method for capturing an object, comprising: processing for capturing an image of the subject when an input for instructing to capture an image of the subject formed on the frame is received from the outside. The subject capturing method according to claim 7,
The area of the image of the subject occupies the area of the frame when it is not detected that the frame is out of the frame in the out-of-frame detection process while the magnification is enlarged in the zoom change process A subject detection ratio that is a ratio is calculated as the size, and a peak detection process for detecting a plurality of peaks of the subject occupation ratio;
An imaging process for capturing an image of the subject each time the plurality of peaks are detected in the peak detection process;
A process of storing each of the images of the subject imaged in the imaging process in a storage unit provided in the camera;
Peak identification processing for identifying the largest peak detected in the peak detection processing;
An image that deletes an image other than the image of the subject imaged when the largest peak identified by the peak identification process is detected among the images captured during the telephoto control stored in the storage unit. And a deletion process. The subject capturing method according to claim 9,
While performing the telephoto control in the zoom change process, there is a magnification detection process for detecting the magnification when the peak is detected in the peak detection process and specifying the smallest magnification among the detected. And
In the image deletion process, the peak identified in the peak identification process among the images captured during the telephoto control stored in the storage unit is detected, and the magnification detected in the magnification detection process A method for capturing a subject, wherein an image other than the image of the subject that has been imaged is deleted. For cameras with telephoto function,
A subject identification procedure for identifying a subject to be photographed;
A program for executing a zoom change procedure for changing the magnification of a subject so that the size of the subject identified in the subject identification procedure is maximized within a frame having a predetermined size. The program according to claim 11,
Causing the camera to execute an out-of-frame detection procedure for detecting that the image of the subject identified in the subject identification procedure is out of the frame;
In the zoom change procedure, the telephoto control for enlarging the magnification of the subject identified in the subject identification procedure is started from the preset minimum magnification, and the telephoto control is performed. When it is detected that the subject is out of the frame in the out-of-frame detection procedure, wide angle control for reducing the magnification is performed, and the subject is out of the frame in the out-of-frame detection procedure by the wide-angle control. A program characterized by ending the reduction of the magnification when it is no longer detected. The program according to claim 12,
A program for causing the camera to execute a procedure for capturing an image of a subject when an input for instructing to capture an image of the subject formed on the frame is received from the outside. The program according to claim 12,
The area of the image of the subject occupies the area of the frame when it is not detected that the frame is out of the frame in the out-of-frame detection procedure while the magnification is enlarged in the zoom change procedure A peak detection procedure for calculating a subject occupation ratio as a ratio as the size and detecting a plurality of peaks of the subject occupation ratio;
An imaging procedure for capturing an image of the subject each time the plurality of peaks are detected in the peak detection procedure;
Storing each of the images of the subject imaged in the imaging procedure in a storage unit provided in the camera;
A peak identification procedure for identifying the largest peak detected in the peak detection procedure;
An image that deletes an image other than the image of the subject imaged when the largest peak identified in the peak identification procedure is detected among the images captured during the telephoto control stored in the storage unit. A program that causes the camera to execute a deletion procedure. The program according to claim 14, wherein
While performing the telephoto control in the zoom change procedure, the magnification detection procedure for detecting the magnification when the peak is detected in the peak detection procedure and specifying the smallest magnification among the detected detections is performed. Let the camera run,
In the image deletion procedure, the peak identified in the peak identification procedure among the images captured during the telephoto control stored in the storage unit is detected, and the magnification detected in the magnification detection procedure A program that deletes an image other than the image of the subject imaged when

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