CN113923338A - Follow shooting system with picture stabilizing function and follow shooting method with picture stabilizing function - Google Patents
Follow shooting system with picture stabilizing function and follow shooting method with picture stabilizing function Download PDFInfo
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- CN113923338A CN113923338A CN202010647727.4A CN202010647727A CN113923338A CN 113923338 A CN113923338 A CN 113923338A CN 202010647727 A CN202010647727 A CN 202010647727A CN 113923338 A CN113923338 A CN 113923338A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000000087 stabilizing effect Effects 0.000 title abstract description 14
- 230000003287 optical effect Effects 0.000 claims abstract description 142
- 238000013459 approach Methods 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims description 42
- 238000005070 sampling Methods 0.000 claims description 41
- 230000006641 stabilisation Effects 0.000 claims description 12
- 238000011105 stabilization Methods 0.000 claims description 12
- 230000036316 preload Effects 0.000 claims description 5
- 230000006870 function Effects 0.000 description 24
- 238000010586 diagram Methods 0.000 description 9
- 238000003491 array Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/61—Control of cameras or camera modules based on recognised objects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/63—Control of cameras or camera modules by using electronic viewfinders
- H04N23/631—Graphical user interfaces [GUI] specially adapted for controlling image capture or setting capture parameters
- H04N23/632—Graphical user interfaces [GUI] specially adapted for controlling image capture or setting capture parameters for displaying or modifying preview images prior to image capturing, e.g. variety of image resolutions or capturing parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/695—Control of camera direction for changing a field of view, e.g. pan, tilt or based on tracking of objects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
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Abstract
A follow-up shooting system with picture stabilizing function and a follow-up shooting method with picture stabilizing function are suitable for enabling the image obtaining direction of a follow-up shooting base to approach an optical signal source, and the optical signal source is used for sending out an optical positioning signal; the method comprises the following steps: receiving the optical positioning signal by an optical signal receiving array, and generating receiving intensity by a plurality of optical signal receiving units of the optical signal receiving array respectively; comparing the received intensities, and analyzing the position of an optical signal source of the optical positioning signal relative to the optical signal receiving array according to the received intensities to generate a first steering signal; and sending a first steering signal to control the follow-shooting base so that the image acquisition direction approaches to the position of the optical signal source. And then, identifying the characteristic object by using the handheld mobile device, and taking over the control of the follow-shooting base.
Description
Technical Field
The present invention relates to a follow-up system for video recording, and more particularly to a follow-up system with a picture stabilizing function and a follow-up method with a picture stabilizing function.
Background
Although several slap-following technologies are developed at present, a base can drive a smartphone to slap a specific target. However, when the specific target to be followed is quickly separated from the following picture, the smart phone is lack of a traceable target, and the following picture cannot be continuously followed. Although the partial tracking mechanism has a search mode, the search mode is usually a blind search, so that the probability of search failure is still high. In addition, if the tracking mechanism accelerates the tracking speed to avoid the specific target from being separated from the tracking picture, the tracking is often excessive. The excessive follow-up causes the smart phone to continuously swing to follow a specific target during shooting, so that the shooting picture (especially the dynamic movie streaming) obviously shakes, and therefore, the need of improving the follow-up mode still remains.
Disclosure of Invention
In view of the above problems, the present invention provides a tracking system with a picture stabilizing function, which includes an optical tracker, a tracking base and a handheld mobile device.
The optical tracker has an optical signal source for emitting an optical positioning signal. The tracking and shooting base comprises a control chip, a steering module and an optical signal receiving array. The steering module is electrically connected to the control chip, an image acquisition direction is defined on the steering module, and the control chip is used for controlling the steering module to steer so as to change the image acquisition direction; the optical signal receiving array is electrically connected to the control chip and rotates synchronously with the steering module, and the optical signal receiving array is used for receiving the optical positioning signal towards the image acquisition direction, generating a receiving intensity distribution and transmitting the receiving intensity distribution to the control chip. The handheld mobile device is borne on the steering module and is in communication connection with the photographing base, and the handheld mobile device comprises a microprocessor and a camera. The camera is electrically connected with the microprocessor and used for shooting a camera shooting picture along the image acquisition direction and transmitting the camera shooting picture to the microprocessor; the microprocessor defines a plurality of sampling frames with different sizes in the shooting picture and preloads one of the sampling frames, and the microprocessor changes the loaded sampling frame according to a selection instruction.
The control chip compares the received intensity distribution, analyzes the angle of the image acquisition direction to be changed according to the received intensity distribution, generates a first steering signal, and sends the first steering signal to control the steering module to enable the image acquisition direction to approach the position of the optical signal source.
The microprocessor identifies a characteristic object in the shooting picture, and when the characteristic object is identified, the control chip stops sending a first steering signal; when the characteristic object exceeds the loaded sampling frame, the microprocessor sends a second steering signal to drive the steering module to change the image acquisition direction, so that the characteristic object returns to the sampling frame.
In at least one embodiment, the optical tracker further comprises a first encoding circuit for generating a designated identification code; the first coding circuit is used for driving the optical signal source to send out an optical positioning signal according to the appointed identification code, and enabling the optical positioning signal to carry the appointed identification code; and the control chip analyzes whether the optical positioning signal contains the appointed identification code, and if the optical positioning signal contains the appointed identification code, the control chip compares the received intensity distribution.
In at least one embodiment, the optical tracker further includes at least one first key electrically connected to the first encoding circuit, and configured to be pressed to trigger the first encoding circuit to drive the optical signal source to emit the optical positioning signal.
In at least one embodiment, when a plurality of feature objects are identified, the microprocessor analyzes the movement of each feature object and the optical signal source to find out the feature object linked with the optical signal source, so that the linked feature objects are maintained in the sampling frame.
In at least one embodiment, the first steering signal includes a steering direction and a steering angular velocity, and the steering angular velocity is associated with the received intensity profile; when the intensity front value in the received intensity distribution is closer to the edge of the optical signal receiving array, the steering angular speed is higher; the steering angular velocity is lower as the intensity front in the received intensity profile is closer to the center of the optical signal receiving array.
The invention also provides a following shooting method with the picture stabilizing function, which is suitable for enabling an image acquisition direction of a following shooting base to approach an optical signal source, wherein the optical signal source is used for sending an optical positioning signal.
The following shooting method with the picture stabilizing function comprises the following steps: continuously shooting a camera shooting picture along the image acquisition direction; receiving the optical positioning signal towards the image acquisition direction to generate a received intensity distribution; analyzing the image according to the received intensity distribution to obtain an angle required to be changed in the direction, and generating a first steering signal; sending a first steering signal to control the follow-shooting base so that the image acquisition direction approaches to the position of the optical signal source; identifying whether a characteristic object exists in a shooting picture or not; when the characteristic object is identified, stopping sending the first steering signal; defining a sampling frame in the shooting picture; and when the characteristic object exceeds the loaded sampling frame, sending a second steering signal to drive the follow-shooting base to change the image acquisition direction, so that the characteristic object returns to the sampling frame.
In at least one embodiment, the following photographing method with picture stabilization function further includes defining a plurality of sample frames with different sizes in the photographed picture before defining the sample frames in the photographed picture, and preloading one of the sample frames.
In at least one embodiment, the tracking method with frame stabilization further includes changing the loaded sampling frame according to a selection instruction.
In at least one embodiment, the tracking method with picture stabilization further includes analyzing whether the optical positioning signal includes a specific identification code before generating the first steering signal, and comparing the received intensity distribution if the optical positioning signal includes the specific identification code.
The invention receives the optical positioning signal through the optical coding receiving array, can effectively increase the receiving visual angle, avoids the search failure and can ensure that the characteristic objects needing to be followed up are maintained in the shooting picture. In addition, in at least one embodiment, the sampling frame can be set quickly, so that excessive follow-up shooting can be avoided, and the problem that the shooting picture is unstable and shakes is solved.
Drawings
FIG. 1 is a system diagram of a photo-following system with a picture-stabilizing function according to a first embodiment of the present invention;
FIG. 2 is a block diagram of a remote control device and a base for a follow shot in a first embodiment of the present invention;
FIG. 3 is a diagram illustrating a threshold group of a plurality of optical signal receiving units of an optical signal receiving array according to a first embodiment of the present invention;
fig. 4 to 9 show optical signal receiving arrays in different array forms according to the first embodiment of the present invention;
FIG. 10 is a block diagram of a handheld mobile device and a slap base according to a first embodiment of the invention;
FIG. 11 is a diagram illustrating a plurality of sample frames and a selection list in a sample frame according to a first embodiment of the present invention;
FIGS. 12 and 13 are schematic diagrams of tracking an optical signal source according to a first embodiment of the present invention;
FIGS. 14 and 15 are schematic diagrams of feature objects maintained in a sample frame according to a first embodiment of the present invention;
FIG. 16 is a schematic view of tracking a plurality of feature objects according to a first embodiment of the present invention;
FIG. 17 is a block diagram of an optical tracker, a remote control device, and a slap base according to a second embodiment of the present invention;
FIG. 18 is a flow chart of a follow shot method with picture stabilization of the present invention;
FIG. 19 is another flowchart of the tracking method with frame stabilization according to the present invention.
[ notation ] to show
100 hand-held mobile device
110 microprocessor
120 camera
130-pass memory cell
140 touch display panel
150 first communication interface
200 heel racket base
210 control chip
220 second communication interface
230 steering module
232 clamp
240 optical signal receiving array
241 threshold group
250 third communication interface
300 remote control device
310 coding circuit
311 first encoding circuit
312 second encoding circuit
320 key group
321 first push button
330 optical signal source
340 fourth communication interface
400 light tracker
M is image pickup picture
A, characteristic article
F is a sampling frame
L selection List
S optical positioning signal
X1-X6 width
Y1-Y6 length
S105-140, S200-S260, step
Detailed Description
Referring to fig. 1, a follow-up photographing system with a picture stabilizing function is disclosed in a first embodiment of the present invention for executing a follow-up photographing method with a picture stabilizing function. The photo-following system with picture stabilization function comprises a photo-following base 200 and a remote control device 300. The follow photographing base 200 has a variable image capturing direction. The handheld mobile device 100 is supported on the following photographing base 200 for photographing a photographing frame M along an image capturing direction, and the handheld mobile device 100 can control the following photographing base 200 to rotate, so as to change the image capturing direction of the handheld mobile device 100 and continuously follow the characteristic object a. The tracking base 200 can automatically change the image capturing direction to approach the remote control device 300. That is, the follow-up base 200 can search the remote control device 300 by itself, so that the image capturing direction of the handheld mobile device 100 approaches the remote control device 300, and the handheld mobile device 100 can recognize the feature object a, and further control the follow-up base 200 to maintain the feature object a within the designated range of the camera frame M.
As shown in fig. 1 and 2, the remote control device 300 has an encoding circuit 310, an optical signal source 330, and a key set 320.
The encoding circuit 310 is used to generate a designated identification code. The optical signal source 330 is electrically connected to the encoding circuit 310, and the encoding circuit 310 is configured to drive the optical signal source 330 to emit an optical positioning signal S according to the designated identification code, and make the optical positioning signal S carry the designated identification code; in one embodiment, the optical signal source 330 can be a single optically encoded transmit unit or an optically encoded transmit array. The key set 320 is electrically connected to the encoding circuit 310, and is used for being pressed to trigger the encoding circuit 310 to drive the optical signal source 330 to emit the optical positioning signal S for tracking with the photographing base 200.
As shown in fig. 1 and fig. 2, the following photographing base 200 includes a control chip 210, a second communication interface 220, a steering module 230, and an optical signal receiving array 240.
As shown in fig. 1 and fig. 2, the second communication interface 220 is electrically connected to the control chip 210 and establishes a communication connection with the first communication interface 150 of the handheld mobile device 100, so that the control chip 210 of the photographing base 200 establishes a communication connection with the handheld mobile device 100, receives a second steering signal sent from the handheld mobile device 100, and sends the second steering signal to the control chip 210.
As shown in fig. 1 and 2, the steering module 230 is electrically connected to the control chip 210, and the steering module 230 defines an image capturing direction. Meanwhile, the steering module 230 is used for carrying the handheld mobile device 100, so that the handheld mobile device 100 can shoot the camera shooting picture M along the image capturing direction. The control chip 210 drives the turning module 230 to turn to change the image capturing direction according to the second turning signal or the first turning signal, so as to change the range covered by the image capturing frame M.
The steering module 230 generally includes one or more motors, a necessary gear box, and a clamp 232, wherein the clamp 232 is used to clamp the handheld mobile device 100 to carry the handheld mobile device 100 on the steering module 230.
As shown in fig. 1, 2 and 3, the optical signal receiving array 240 is electrically connected to the control chip 210 and rotates synchronously with the steering module 230, particularly the clamp 232. The optical signal receiving array 240 has a plurality of optical signal receiving units for receiving the optical positioning signal S, and forms different receiving intensities according to different receiving distances and angles, so as to generate a receiving intensity distribution, and transmit the receiving intensity distribution to the control chip 210. Generally, the more the optical locating signal S is directed toward the optical signal receiving unit, the stronger the received intensity. The control chip 210 analyzes whether the optical locating signal S contains a designated identification code. If the optical positioning signal S includes the designated identification code, the control chip 210 compares the received intensity distribution, analyzes the angle that needs to be changed in the image acquisition direction according to the received intensity distribution, generates a first steering signal, and sends the first steering signal to control the steering module 230, so that the image acquisition direction approaches the position of the optical signal source 330. Therefore, holding the camera screen M of the mobile device 100 makes it possible to bring the object carrying the remote control device 300 into the mirror. The first steering signal includes a steering angular velocity in addition to the steering direction. The steering angular velocity is related to the received intensity profile, and is higher as the intensity front in the received intensity profile is closer to the edge of the optical signal receiving array 240; conversely, the steering angular velocity is lower as the intensity front in the received intensity profile is closer to the center of the optical signal receiving array 240.
As shown in fig. 3, the manner of analyzing the angle that the image acquisition direction needs to be changed according to the reception intensity distribution is as follows.
The middle region of the optical signal receiving array 240 may define a threshold group 241, and the optical signal receiving units in the threshold group 241 are set to have the receiving intensity exceeding the threshold value to obtain the desired receiving intensity distribution, i.e. the image capturing direction defined by the turning module 230 at this time, approaching the optical signal source 330 of the remote control device 300. If at least one of the receiving intensities of the optical signal receiving units in the threshold group 241 does not reach the threshold value, the optical signal receiving array 240 is turned (i.e. the turning module 230 is turned) to the direction with higher receiving intensity according to the position of the optical signal receiving unit in the optical signal receiving array 240 and the receiving intensities of the other optical signal receiving units until all the receiving intensities of the optical signal receiving units in the threshold group 241 reach the threshold value. The range size of the threshold group 241 is related to the sensitivity, and the smaller the range of the threshold group 241, the higher the sensitivity, i.e. the closer the image acquisition direction is to the optical signal source 330.
As shown in fig. 4 to 9, the square rectangular array and the planar configuration in fig. 3 are only examples, and the optical signal receiving array 240 may be in the form of a long rectangular array, a circular array (including circular and polygonal frames), a trapezoidal array (including triangles), a cross array, or a combination of the foregoing arrays, and may be disposed on a curved surface to increase the angle that can be received. The fixture 232 in fig. 3, in which the optical signal receiving array 240 is fixed to the steering module 230, is also exemplified as long as the receiving surface of the optical signal receiving array 240 can rotate synchronously with the image capturing direction defined by the steering module 230.
Referring to fig. 1 and 10, the handheld mobile device 100 of the present invention may be an electronic device such as a smart phone, a tablet computer, etc. having functions of shooting and recording and capable of establishing a communication connection with the shooting base 200.
As shown in fig. 1 and 10, the handheld mobile device 100 is carried by the steering module 230, and the handheld mobile device 100 includes a microprocessor 110, a camera 120, a memory unit 130, a touch display panel 140, and a first communication interface 150.
As shown in fig. 1 and 10, the camera 120, the through memory unit 130 and the touch display panel 140 are electrically connected to the microprocessor 110. The camera 120 is used for capturing a camera image M along an image capturing direction and transmitting the camera image M to the microprocessor 110 for transmission to the memory unit 130 to store the camera image M.
As shown in fig. 10 and 11, the microprocessor 110 defines a plurality of sample frames F with different sizes in the shot frame M and preloads one of the sample frames F.
As shown in fig. 10, the memory unit 130 is used for storing an operating system and necessary shooting applications in addition to the shooting frame M, and the memory unit 130 stores the setting values of the sampling frame F for the microprocessor 110 to load and execute for the follow-up shooting mode.
As shown in fig. 10 and 11, the touch display panel 140 is electrically connected to the microprocessor 110 for displaying the image capturing frame M, and can receive the touch operation as a selection instruction to be fed back to the microprocessor 110.
As shown in FIGS. 10 and 11, the microprocessor 110 can change the loaded sample frame F according to the selection instruction. As shown in fig. 11, a selection list L that is independent or pops up in the image frame M is displayed, and options of sampling frames F with different sizes are displayed from small to large for the user to select from the touch display panel 140. The sample box F size may be expressed in terms of width multiplied by height, e.g., width X1 to X6, width Y1 to Y6, forming different combinations of width and height.
As shown in fig. 1 and 10, the first communication interface 150 is electrically connected to the microprocessor 110 for establishing a communication connection. The first communication interface 150 may be a wired communication interface, such as a USB interface, or a wireless communication interface, such as bluetooth, RF communication interface, or Wi-Fi interface (supporting Wi-Fi Direct).
As shown in fig. 1, 2 and 10, different keys of the key set 320 are used for triggering the encoding circuit 310 to send out other optical encoding signals, such as start and end of a shooting function, start and stop of a follow-shot mode, a shutter for acquiring a single photo, etc., to be received by the follow-shot base 200 and transmitted to the handheld mobile device 100 through the first communication interface 150 and the second communication interface 220, so as to operate related functions of the handheld mobile device 100 through the remote control device 300. In addition, the selection instruction is not necessarily generated by the touch display panel 140, the encoding circuit 310 may pre-store a plurality of numbers, each number corresponds to one sampling frame F, and the selection instruction or the number of different sampling frames F may be sent out in a cyclic manner by continuously pressing the keys of the key group 320, so that the handheld mobile device 100 loads the corresponding sampling frame F.
As shown in fig. 12 and 13, the optical signal source 330 is disposed along with the feature object a, so that when the image capturing direction approaches the optical signal source 330, the feature object a generally enters the camera frame M, so that the microprocessor 110 can identify the feature object a from the camera frame M.
As shown in fig. 13 and 14, when the microprocessor 110 identifies the feature object a from the camera frame M, the handheld mobile device 100 enables the follow-up mode, the microprocessor 110 preloads one of the sample frames F, and continues to identify the feature object a. The microprocessor 110 simultaneously sends out an interrupt signal, and the interrupt control chip 210 generates a first steering signal; at this point, the steering module 230 is controlled instead by the handheld mobile device 100. When the feature object a exceeds the loaded sampling frame F, the microprocessor 110 sends a second turning signal to drive the turning module 230 to change the image capturing direction, so that the feature object a returns to the sampling frame F.
As shown in fig. 15, if the feature object a continuously moves in the shot frame M and the feature object a is still continuously located in the sampling frame F, the image capturing direction is not changed, so that the shot frame M in the first embodiment of the present invention can maintain relatively stable compared to the manner of continuously shooting the feature object a, and the shooting direction is changed only when the feature object a has a large distance displacement.
As shown in fig. 16, when multiple persons enter the mirror at the same time, the face of each person is recognized as a feature object a, so that the microprocessor 110 recognizes a plurality of feature objects a at the same time. At this time, the microprocessor 110 can analyze the movement of the plurality of feature objects a and the optical signal source 330 to find out the feature object a linked with the optical signal source 330, such as the face of a person wearing the remote control device 300 (the optical signal source 330), so that the feature object a is maintained in the sampling frame F.
Fig. 17 is a block diagram of an optical tracker 400, a remote control device 300 and a slap base 200 according to a second embodiment of the invention. The second embodiment is to divide the function of emitting the optical locating signal S from the remote control 300 into individual optical trackers 400. Similarly, the encoding circuit 310 of the first embodiment is also divided into a first encoding circuit 311 and a second encoding circuit 312.
As shown in fig. 17, the optical tracker 400 has an optical signal source 330, a first encoding circuit 311 and at least one first key 321. The optical signal source 330 is used to emit an optical locating signal S. The first encoding circuit 311 is used for generating a designated identification code, and the first encoding circuit 311 is used for driving the optical signal source 330 to emit the optical locating signal S according to the designated identification code, and making the optical locating signal S carry the designated identification code. At least one first key 321 is electrically connected to the first encoding circuit 311, and is used for being pressed to trigger the first encoding circuit 311 to drive the optical signal source 330 to emit the optical positioning signal S. That is, the remote control device 300 may not need to have the function of emitting the optical locating signal S. The tracking base 200 can automatically change the image capturing direction so that the image capturing direction approaches the optical tracker 400.
As shown in FIG. 17, in the second embodiment, the heel-and-shoot base 200 and the remote control device 300 are also slightly adjusted. In the second embodiment, the photographing following base 200 further includes a third communication interface 250 electrically connected to the control chip 210. The remote control device 300 further includes a fourth communication interface 340 electrically connected to the second encoding circuit 312. The third communication interface 250 and the fourth communication interface 340 are used to establish a communication connection. The third communication interface 250 and the fourth communication interface 340 may be wireless communication interfaces, such as bluetooth, RF communication interface, Wi-Fi interface (supporting Wi-Fi Direct). Specifically, the communication connection between the third communication interface 250 and the fourth communication interface 340, and the communication connection between the first communication interface 150 and the second communication interface 220 use different communication protocols.
As shown in fig. 17, different keys of the key set 320 are used to trigger the second encoding circuit 312 to generate function command codes, such as start and end of a shooting function, start and stop of a follow-up shooting mode, a shutter for taking a single photo, and the like, to be sent out through the fourth communication interface 340. The function command code is received by the third communication interface 250 of the slap base 200. The function command code is then transmitted to the handheld mobile device 100 through the first communication interface 150 and the second communication interface 220, so as to operate the related functions of the handheld mobile device 100 through the remote control device 300. In addition, the selection instruction is not necessarily generated by the touch display panel 140, the second encoding circuit 312 may pre-store a plurality of numbers, each number corresponds to one sampling frame F, and the selection instruction or the number of different sampling frames F may be sent out in a cyclic manner by continuously pressing the keys of the key group 320, so that the handheld mobile device 100 loads the corresponding sampling frame F. That is, when the optical tracker 400 becomes a stand-alone device, the elements of the remote control device 300 are no longer used to trigger and generate the optical locating signal S.
As shown in fig. 18, the following photographing method with picture stabilizing function of the present invention is suitable for making the image obtaining direction of the following photographing base 200 approach to the optical signal source 330, wherein the optical signal source 330 is used for sending the optical positioning signal S; the method comprises the following steps.
The microprocessor 110 enables the camera 120, so that the camera 120 continuously captures the camera image M along an image capturing direction and transmits the captured image M to the microprocessor 110, as shown in step S105.
The optical positioning signal S is received by the optical signal receiving array 240 toward the image capturing direction, and a receiving intensity distribution is generated, as shown in step S110.
The control chip 210 analyzes the angle that needs to be changed in the image obtaining direction according to the received intensity distribution, and generates a first steering signal, as shown in step S120.
The control chip 210 sends a first turning signal to control the photographing base 200 to make the image capturing direction approach to the position of the optical signal source 330, as shown in step S130.
The microprocessor 110 identifies whether a feature object a exists in the camera frame M, as shown in step S140.
As mentioned above, when the image capturing direction approaches the optical signal source 330, the feature object a usually enters the captured image M. At this time, the microprocessor 110 recognizes that the feature object a exists in the camera frame M, and the handheld mobile device 100 can start the follow-up shooting mode, as shown in step S200.
As shown in fig. 19, after the handheld mobile device 100 starts the follow-shot mode, the microprocessor 110 controls the control chip 210 to stop sending the first steering signal through the communication connection, so as to stop the function of the follow-shot base 200 to track the optical signal source 330, as shown in step S205.
The handheld mobile device 100 defines a plurality of sample frames F with different sizes in the camera frame M, and preloads one of the sample frames F, as shown in step S210. If a selection instruction is inputted, the loaded sample frame F is changed according to the selection instruction, as shown in steps S220 and S230.
The feature object a is identified in the shot M, as shown in step S240. It is determined whether the feature object A exceeds the loaded sampling frame F, as shown in step S250. When the feature object a exceeds the loaded sampling frame F, the handheld mobile device 100 sends a second turning signal to drive the turning module 230 to change the image capturing direction, so that the feature object a returns to the sampling frame F, as shown in step S260.
Similarly, when a plurality of feature objects a are identified in step S240, the microprocessor 110 can analyze the movement of the feature objects a and the optical signal source 330 to find out the feature object a linked with the optical signal source 330, for example, the face of a person wearing the remote control device 300 (optical signal source 330), so that the feature object a is maintained in the sampling frame F. Alternatively, the microprocessor 110 can adjust the magnification of the camera 120 to maintain all of the feature objects a in the sample frame F. Alternatively, the microprocessor 110 maintains the selected feature object A in the sample frame F according to a selection instruction.
The invention receives the optical positioning signal S through the optical coding receiving array, can effectively increase the receiving visual angle, avoids the search failure and can ensure that the characteristic object A needing to be shot is maintained in the shooting picture M. And the sampling frame F that can set for fast can avoid excessively following the bat, solves the unstable problem of rocking of picture M of making a video recording.
Claims (9)
1. A follow-shot system with picture stabilization function is characterized by comprising:
the optical tracker is provided with an optical signal source and is used for sending an optical positioning signal;
a heel-clap base, comprising:
a control chip;
the steering module is electrically connected with the control chip, an image acquisition direction is defined on the steering module, and the control chip is used for controlling the steering module to steer so as to change the image acquisition direction; and
the optical signal receiving array is electrically connected to the control chip and synchronously rotates with the steering module, and is used for receiving the optical positioning signal towards the image acquisition direction, generating a receiving intensity distribution and transmitting the receiving intensity distribution to the control chip; and
a handheld mobile device, bearing on the steering module and establishing communication connection with the slap-following base, the handheld mobile device comprising:
a microprocessor; and
the camera is electrically connected with the microprocessor and used for shooting a camera shooting picture along the image acquisition direction and transmitting the camera shooting picture to the microprocessor; the microprocessor defines a plurality of sampling frames with different sizes in the shooting picture, and preloads one of the sampling frames, and changes the loaded sampling frame according to a selection instruction;
the control chip compares the received intensity distribution, analyzes the angle of the image acquisition direction to be changed according to the received intensity distribution, generates a first steering signal, and sends the first steering signal to control the steering module to enable the image acquisition direction to approach the position of the optical signal source; and
the microprocessor identifies a characteristic object in the shooting picture, and when the characteristic object is identified, the control chip stops sending a first steering signal; when the characteristic object exceeds the loaded sampling frame, the microprocessor sends out a second steering signal to drive the steering module to change the image acquisition direction, so that the characteristic object returns to the sampling frame.
2. The photo-tracking system with picture-stabilizing function as claimed in claim 1, wherein the light tracker further comprises:
a first encoding circuit for generating a designated identification code; the first coding circuit is used for driving the optical signal source to send out the optical positioning signal according to the appointed identification code and enabling the optical positioning signal to carry the appointed identification code;
the control chip analyzes whether the optical positioning signal contains the appointed identification code, and if the optical positioning signal contains the appointed identification code, the control chip compares the receiving intensity distribution.
3. The photo-tracking system with picture-stabilizing function as claimed in claim 2, wherein the light tracker further comprises:
at least one first key electrically connected to the first coding circuit for being pressed to trigger the first coding circuit to drive the optical signal source to emit the optical positioning signal.
4. The system of claim 1, wherein when a plurality of the feature objects are identified, the microprocessor analyzes the movement of each feature object and the optical signal source to find the feature object linked with the optical signal source, so that the linked feature object is maintained in the sampling frame.
5. The follow-up system with picture stabilization function according to claim 1, wherein the first steering signal comprises:
a turning direction; and
a steering angular velocity, and the steering angular velocity is related to the reception intensity distribution; the higher the steering angular velocity is as the intensity front in the received intensity profile is closer to the edge of the optical signal receiving array; the steering angular velocity is lower as the intensity front in the received intensity profile is closer to the center of the optical signal receiving array.
6. A follow-up shooting method with picture stabilization function is characterized in that the follow-up shooting method is suitable for enabling an image acquisition direction of a follow-up shooting base to approach an optical signal source, and the optical signal source is used for sending an optical positioning signal; the method comprises the following steps:
continuously shooting a camera shooting picture along the image acquisition direction;
receiving the optical positioning signal towards the image acquisition direction to generate a receiving intensity distribution;
analyzing the angle of the image acquisition direction to be changed according to the receiving intensity distribution to generate a first steering signal;
sending the first steering signal to control the follow-shooting base to enable the image acquisition direction to approach the position of the optical signal source;
identifying whether a characteristic object exists in the shooting picture; when the characteristic object is identified, stopping sending the first steering signal;
defining a sampling frame in the image pick-up picture; and
when the characteristic object exceeds the loaded sampling frame, a second steering signal is sent out to drive the follow-shooting base to change the image acquisition direction, so that the characteristic object returns to the sampling frame.
7. The follow-up shooting method with picture stabilization function according to claim 6, further comprising:
before defining the sampling frame in the shooting picture, defining a plurality of sampling frames with different sizes in the shooting picture, and preloading one of the sampling frames.
8. The follow-up shooting method with picture stabilization function according to claim 7, further comprising:
the loaded sample frame is changed according to a selection instruction.
9. The follow-up shooting method with picture stabilization function according to claim 6, further comprising:
before generating the first steering signal, analyzing whether the optical positioning signal contains a designated identification code, and comparing the received intensity distribution if the optical positioning signal contains the designated identification code.
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