US20150271381A1 - Methods and systems for determining frames and photo composition within multiple frames - Google Patents

Methods and systems for determining frames and photo composition within multiple frames Download PDF

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Publication number
US20150271381A1
US20150271381A1 US14/220,149 US201414220149A US2015271381A1 US 20150271381 A1 US20150271381 A1 US 20150271381A1 US 201414220149 A US201414220149 A US 201414220149A US 2015271381 A1 US2015271381 A1 US 2015271381A1
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Prior art keywords
frames
frame
moving speed
candidate
area corresponding
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US14/220,149
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English (en)
Inventor
Bing-Sheng Lin
Yi-Chi Lin
Tai-Ling Lu
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HTC Corp
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HTC Corp
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Priority to US14/220,149 priority Critical patent/US20150271381A1/en
Priority to TW103137446A priority patent/TWI531911B/zh
Priority to CN201410614516.5A priority patent/CN104933677B/zh
Assigned to HTC CORPORATION reassignment HTC CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LIN, YI-CHI, LU, TAI-LING, LIN, BING-SHENG
Publication of US20150271381A1 publication Critical patent/US20150271381A1/en
Priority to US15/159,825 priority patent/US9898828B2/en
Abandoned legal-status Critical Current

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    • H04N2209/042—Picture signal generators using solid-state devices having a single pick-up sensor

Definitions

  • the disclosure relates generally to image frame management, and, more particularly to methods and systems for determining frames and photo composition within multiple frames.
  • a handheld device may have telecommunications capabilities, e-mail message capabilities, image capture capabilities, an advanced address book management system, a media playback system, and various other functions. Due to increased convenience and functions of the devices, these devices have become necessities of life.
  • the image capture unit such as a camera takes images immediately one after another in a short amount of time. That is, when the continuous shot function is performed, a continuous image capture process is performed to continuously capture a plurality of images in sequence.
  • an inventive function called “dynamic continuous shot composition” may be also provided on the portable devices.
  • the dynamic continuous shot composition is a way for image composition.
  • a camera can be set on a tripod, and several images with the same scene are continuously captured by the camera.
  • the moving object within the images are extracted and overlapped onto the last image, thus to present the dynamic effect of the track of the moving object.
  • the overlap of the moving object onto the last image can be achieved by using an image composition algorithm. It is understood that, the image composition algorithm may be various and known in the art, and related descriptions are omitted here.
  • the respective images are continuously captured with a fixed time interval. If the time interval is too short or the moving speed of the object is too fast, the objects on the composed image may have a large overlapped portion, as shown in FIG. 1A . On the contrary, if the time interval is too long or the moving speed of the object is too slow, the objects may be scattered on the composed image, as shown in FIG. 1B , and the number of the objects on the composed image may be not enough, resulting in difficulties for presenting the dynamic effect.
  • a plurality of frames which are respectively captured with a predefined time interval are obtained. At least one object within at least two of the frames is detected. A moving speed of the object is calculated according to the positions of the object in the respective frames and the predefined time interval, and candidate frames are selected from the frames according to the moving speed of the object.
  • An embodiment of a system for determining frames within multiple frames comprises a storage unit and a processing unit.
  • the storage unit comprises a plurality of frames, which are respectively captured with a predefined time interval.
  • the processing unit detects at least one object within at least two of the frames.
  • the processing unit calculates a moving speed of the object according to the positions of the object in the respective frames and the predefined time interval, and selects candidate frames from the frames according to the moving speed of the object.
  • a plurality of frames which are respectively captured with a predefined time interval are obtained. At least one object within at least two of the frames is detected. A moving speed of the object is calculated according to the positions of the object in the respective frames and the predefined time interval, and candidate frames are selected from the frames according to the moving speed of the object. The candidate frames are composed to generate a composed photo.
  • An embodiment of a system for photo composition within multiple frames comprises a storage unit and a processing unit.
  • the storage unit comprises a plurality of frames, which are respectively captured with a predefined time interval.
  • the processing unit detects at least one object within at least two of the frames.
  • the processing unit calculates a moving speed of the object according to the positions of the object in the respective frames and the predefined time interval, and selects candidate frames from the frames according to the moving speed of the object.
  • the processing unit composes the candidate frames to generate a composed photo.
  • a table is looked up according to the moving speed of the object to obtain a frame gap number, and the candidates frames are selected within the frames at intervals of the frame gap number. In some embodiments, the faster the moving speed is, the larger the frame gap number is.
  • a plurality of frames which are respectively captured with a predefined time interval are obtained. At least one object within at least two of the frames is detected. An overlapped area corresponding to the object within a first frame and a second frame is calculated, and at least one candidate frame is selected according, to the overlapped area corresponding to the object.
  • An embodiment of a system for determining frames within multiple frames comprises a storage unit and a processing unit.
  • the storage unit comprises a plurality of frames, which are respectively captured with a predefined time interval.
  • the processing unit detects at least one object within at least two of the frames.
  • the processing unit calculates an overlapped area corresponding to the object within a first frame and a second frame, and selects at least one candidate frame according to the overlapped area corresponding to the object.
  • a plurality of frames which are respectively captured with a predefined time interval are obtained. At least one object within at least two of the frames is detected. An overlapped area corresponding to the object within a first frame and a second frame is calculated, and at least one candidate frame is selected according to the overlapped area corresponding to the object. The at least one candidate frame is composed to generate a composed photo.
  • An embodiment of a system for photo composition within multiple frames comprises a storage unit and a processing unit.
  • the storage unit comprises a plurality of frames, which are respectively captured with a predefined time interval.
  • the processing unit detects at least one object within at least two of the frames.
  • the processing unit calculates an overlapped area corresponding to the object within a first frame and a second frame, and selects at least one candidate frame according to the overlapped area corresponding to the object.
  • the processing unit composes the at least one candidate frame to generate a composed photo.
  • Methods for determining frames and photo composition within multiple frames may take the form of a program code embodied in a tangible media.
  • the program code When the program code is loaded into and executed by a machine, the machine becomes an apparatus for practicing the disclosed method.
  • FIG. 1A is a schematic diagram illustrating an example of a composed image with objects having a large overlapped portion
  • FIG. 1B is a schematic diagram illustrating an example of a composed image with scattered objects
  • FIG. 2 is a schematic diagram illustrating an embodiment of a system for determining frames and photo composition within multiple frames of the invention
  • FIG. 3 is a flowchart of an embodiment of a method for determining frames within multiple frames of the invention
  • FIG. 4 is a flowchart of another embodiment of a method for determining frames within multiple frames of the invention.
  • FIG. 5 is a flowchart of an embodiment of a method for selecting at least one candidate frame according to the overlapped area corresponding to the object of the invention
  • FIG. 6 is a flowchart of another embodiment of a method for selecting at least one candidate frame according to the overlapped area corresponding to the object of the invention.
  • FIG. 7 is a flowchart of an embodiment of a method for photo composition within multiple frames of the invention.
  • FIG. 8 is a flowchart of another embodiment of a method for photo composition within multiple frames of the invention.
  • FIG. 2 is a schematic diagram illustrating an embodiment of a system for determining frames and/or photo composition within multiple frames of the invention.
  • the system for determining frames and/or photo composition within multiple frames 100 can be used in an electronic device, such as a computer, or a portable device, such as a digital camera, a handheld device such as a mobile phone, a smart phone, a PDA (Personal Digital Assistant), a GPS (Global Positioning System), or any picture-taking device.
  • an electronic device such as a computer, or a portable device, such as a digital camera, a handheld device such as a mobile phone, a smart phone, a PDA (Personal Digital Assistant), a GPS (Global Positioning System), or any picture-taking device.
  • PDA Personal Digital Assistant
  • GPS Global Positioning System
  • the system for determining frames and/or photo con position within multiple frames 100 comprises a storage unit 110 and a processing unit 120 .
  • the storage unit 110 comprises a plurality of frames, which are respectively captured with a tune interval. It is understood that, in some embodiments, a time interval would be predefined or dynamically defined. It is understood that, in some embodiments, the frames can be obtained from a video. It is understood that, in some embodiments, the system for determining frames and/or photo composition within multiple frames 100 can also comprise an image capture unit (not shown in FIG. 2 ).
  • the image capture unit may be a CCD (Charge Coupled Device) or a CMOS (Complementary Metal-Oxide Semiconductor), placed at the imaging position for objects inside the electronic device.
  • the image capture unit can continuously capture the frames within a predefined time interval.
  • the system for determining frames and/or photo composition within multiple frames 100 can also comprise a display unit (not shown in FIG. 2 ).
  • the display unit can display related figures and interfaces, and related data, such as the image frames continuously captured by the image capture unit.
  • the display unit may be a screen integrated with a touch-sensitive device (not shown).
  • the touch-sensitive device has a touch-sensitive surface comprising sensors in at least one dimension to detect contact and movement of an input tool, such as a stylus or finger on the touch-sensitive surface. That is, users can directly input related data via the display unit.
  • the processing unit 120 can control related components of the system for determining frames and/or photo composition within multiple frames 100 , process the image frames, and perform the methods for determining frames and/or photo composition within multiple frames, which will be discussed further in the following paragraphs. It is noted that, in some embodiments, the system for determining frames and/or photo composition within multiple frames 100 can further comprise a focus unit (not shown in FIG. 2 ). The processing unit 120 can control the focus unit to perform a focus process for at least one object during, the photography process.
  • FIG. 3 is a flowchart of an embodiment of a method for determining frames within multiple frames of the invention.
  • the method for determining frames within multiple frames can be used in an electronic device, such as a computer, or a portable device, such as a digital camera, a handheld device such as a mobile phone, a smart phone, a PDA, a GPS, or any picture-taking device.
  • candidate frames for photo composition can be determined.
  • a plurality of frames are obtained. It is understood that, in some embodiments, the frames are continuously and respectively captured within a predefined time interval. In some embodiments, the frames can be obtained from a video.
  • step S 320 at least one object within at least two of the frames, such as the first two successive frames is detected. It is understood that, in some embodiments, the object can be obtained by transforming the at least two frames into grayscale frames, and subtracting the grayscale frames with each other to obtain a contour of the object.
  • a moving speed of the object is calculated according to the positions of the object in the respective frames and the predefined time interval.
  • step S 340 candidate frames are selected from the frames according to the moving speed of the object.
  • a table can be looked up according to the moving speed of the object to obtain a frame gap number, and the candidates frames can be selected within the frames at intervals of the frame gap number. In the table, the faster the moving speed is, the larger the frame nap number is. It is noted that, the actual value of the frame gap number can be flexibly designed according different applications and requirements.
  • the selected candidate frames can be used for photo composition.
  • FIG. 4 is a flowchart of another embodiment of a method for determining frames within multiple frames of the invention.
  • the method for determining frames within multiple frames can be used in an electronic device, such as a computer, or a portable device, such as a digital camera, a handheld device such as a mobile phone, a smart phone, a PDA, a GPS, or any picture-taking device.
  • candidate frames for photo composition can be determined.
  • a plurality of frames are obtained. It is understood that, in some embodiments, the frames are continuously and respectively captured with a predefined time interval. In some embodiments, the frames can be obtained from a video.
  • step S 420 at least one object within at least two of the frames, such as the first two successive frames is detected. It is understood that, in some embodiments, the object can be obtained by transforming the at least two frames into grayscale frames, and subtracting the grayscale frames with each other to obtain as contour of the object.
  • an overlapped area corresponding to the object within two frames, such as a first frame and a second frame is calculated.
  • step S 440 at least one candidate frame is selected according to the overlapped area corresponding to the object.
  • the selected candidate frames can be used for photo composition.
  • FIG. 5 is a flowchart of an embodiment of a method for selecting at least one candidate frame according to the overlapped area corresponding to the object of the invention.
  • step S 510 it is determined whether the overlapped area corresponding to the object within two frames, such as a first frame and a second frame is less than a specific percentage of a contour area of the object. If the overlapped area corresponding to the object is less than a specific percentage of the contour area of the object (Yes in step S 510 ), in step S 520 , the rear frame, such as the second frame is selected as the candidate frame. If the overlapped area corresponding to the object is not less than a specific percentage of the contour area of the object (No in step S 510 ), the procedure is completed.
  • an overlapped area corresponding to the object within the first frame and a subsequent frame such as a third frame (wherein the second frame is not selected as a candidate frame) can be calculated, and accordingly determined.
  • an overlapped area corresponding to the object within the second frame and a subsequent frame such as a third frame (wherein the second frame is selected as a candidate frame) can be calculated, and accordingly determined. The process is repeated until all frames are examined.
  • FIG. 6 is a flowchart of another embodiment of a method for selecting at least one candidate frame according to the overlapped area corresponding to the object of the invention.
  • step S 610 it is determined whether the overlapped area corresponding to the object within two frames, such as a first frame and a second frame equals to zero. If the overlapped area corresponding to the object equals to zero (Yes in step S 610 ), in step S 620 , a moving speed of the object is calculated according to the positions of the object in the two frames and the predefined time interval. It is understood that, in some embodiments, once the contour of the object is detected, the area of the contour, the position of mass center of the area, and the moving speed of the object can be also calculated.
  • step S 630 candidate frames are selected within the frames accord Mg to the moving speed of the object.
  • a table can be looked up according to the moving speed of the object to obtain a frame gap number, and the candidates frames can be selected within the frames at intervals of the frame gap number. In the table, the faster the moving speed is, the larger the frame gap number is. It is noted that, the actual value of the frame gap number can be flexibly designed according different applications and requirements.
  • the selected candidate frames can be used for photo composition. If the overlapped area corresponding to the object does not equal to zero (No in step S 610 ), the procedure is completed.
  • an overlapped area corresponding to the object within the first frame and a subsequent frame such as a third frame (wherein the overlapped area corresponding to the object does not equal to zero) can be calculated, and accordingly determined. The process is repeated until all frames are examined.
  • FIG. 7 is a flowchart of an embodiment of it method for photo composition within multiple frames of the invention.
  • the method for photo composition within multiple frames can be used in an electronic device, such as a computer, or a portable device, such as a digital camera, a handheld device such as a mobile phone, a smart phone, a PDA, a GPS, or any picture-taking device.
  • candidate frames can be selected from frames and used for photo composition.
  • a plurality of frames are obtained. It is understood that, in some embodiments, the frames are continuously and respectively captured with a predefined time interval. In some embodiments, the frames can be obtained from a video.
  • step S 720 at least one object within at least two of the frames, such as the first two successive frames is detected. It is understood that, in some embodiments, the object can be obtained by transforming the at least two frames into grayscale frames, and subtracting the grayscale frames with each other to obtain a contour of the object.
  • a moving speed of the object is calculated according to the positions of the object in the respective frames and the predefined time interval.
  • step S 740 candidate frames are selected from the frames according to the moving speed of the object. It is understood that, in some embodiments, a table can be looked up according to the moving speed of the object to obtain a frame gap number, and the candidates frames can be selected within the frames at intervals of the frame gap number. In the table, the faster the moving speed is, the larger the frame gap number is. It is noted that, the actual value of the frame gap number can be flexibly designed according different applications and requirements.
  • step S 750 the selected candidate frames are composed to generate a composed photo. It is understood that, the composition of candidate frames can be performed by using an image composition algorithm. It is understood that the image composition algorithm may be various and known in the art, and related descriptions are omitted here.
  • FIG. 8 is a flowchart of another embodiment of a method for photo composition within multiple frames of the invention.
  • the method for photo composition can be used in an electronic device, such as a computer, or a portable device, such as a digital camera, a handheld device such as a mobile phone, a smart phone, a PDA, a GPS, or any picture-taking device, in the embodiment, candidate frames can be selected from frames and used for photo composition.
  • step S 810 a plurality of frames are obtained. It is understood that, in some embodiments, the frames are continuously and respectively captured with as predefined time interval. In some embodiments, the frames can be obtained from a video.
  • step S 820 at least one object within at least two of the frames, such as the first two successive frames is detected. It is understood that, in some embodiments, the object can be obtained by transforming the at least two frames into grayscale frames, and subtracting the grayscale frames with each other to obtain a contour of the object.
  • step S 830 an overlapped area corresponding to the object within two frames, such as a first frame and a second frame is calculated.
  • step S 840 at least one candidate frame is selected according to the overlapped area corresponding, to the object. It is understood that, in some embodiments, it is determined whether the overlapped area corresponding to the object is less than a specific percentage of a contour area of the object. If the overlapped area corresponding to the object is less than a specific percentage of the contour area of the object, the second frame is selected as the candidate frame. In some embodiments, it is determined whether the overlapped area corresponding to the object equals to zero.
  • a moving speed of the object is calculated according to the positions of the object in the respective frames and the predefined time interval, and candidate frames are selected within the frames according to the moving speed of the object.
  • the selected candidate frames are composed to generate a composed photo.
  • the composition of candidate frames can be performed by using an image composition algorithm. It is understood that, the image composition algorithm may be various and known in the art, and related descriptions are omitted here.
  • the methods and systems for determining frames and photo composition within multiple frames of the present invention can select appropriate frames from continuously captured frames according to the moving speed of the object, and/or the overlapped area corresponding to the object with frames, and accordingly generate a composed frame, thus improving the dynamic effect of the track of the moving object.
  • Methods for determining frames and photo composition within multiple frames may take the form of a program code (i.e., executable instructions) embodied in tangible media, such as floppy diskettes, CD-ROMS, hard drives, or any other machine-readable storage medium, wherein, when the program code is loaded, into and executed by a machine, such as a computer, the machine thereby becomes an apparatus for practicing the methods.
  • the methods may also be embodied in the form of a program code transmitted over some transmission medium, such as electrical wiring or cabling, through fiber optics, or via any other form of transmission, wherein, when the program code is received and loaded into and executed by a machine, such as a computer, the machine becomes an apparatus for practicing, the disclosed methods.
  • the program code When implemented on a general-purpose processor, the program code combines with the processor to provide a unique apparatus that operates analogously to application specific logic circuits.

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  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Studio Devices (AREA)
  • Image Analysis (AREA)
US14/220,149 2014-03-20 2014-03-20 Methods and systems for determining frames and photo composition within multiple frames Abandoned US20150271381A1 (en)

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US14/220,149 US20150271381A1 (en) 2014-03-20 2014-03-20 Methods and systems for determining frames and photo composition within multiple frames
TW103137446A TWI531911B (zh) 2014-03-20 2014-10-29 用於自多個訊框中決定多個候選訊框的方法
CN201410614516.5A CN104933677B (zh) 2014-03-20 2014-11-04 用以在多个讯框中决定多个候选讯框的方法
US15/159,825 US9898828B2 (en) 2014-03-20 2016-05-20 Methods and systems for determining frames and photo composition within multiple frames

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