WO2016029822A1 - Procédé et dispositif de traitement de prise de vue de filés d'étoiles - Google Patents

Procédé et dispositif de traitement de prise de vue de filés d'étoiles Download PDF

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Publication number
WO2016029822A1
WO2016029822A1 PCT/CN2015/087703 CN2015087703W WO2016029822A1 WO 2016029822 A1 WO2016029822 A1 WO 2016029822A1 CN 2015087703 W CN2015087703 W CN 2015087703W WO 2016029822 A1 WO2016029822 A1 WO 2016029822A1
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WO
WIPO (PCT)
Prior art keywords
star
track
pixel point
pixel
shooting
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Application number
PCT/CN2015/087703
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English (en)
Chinese (zh)
Inventor
龙浩
崔小辉
苗雷
里强
Original Assignee
努比亚技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201410426049.3A external-priority patent/CN104333691B/zh
Application filed by 努比亚技术有限公司 filed Critical 努比亚技术有限公司
Publication of WO2016029822A1 publication Critical patent/WO2016029822A1/fr

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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

Definitions

  • This paper relates to the field of satellite track processing technology, and in particular to a star track shooting processing method and device.
  • the technical problem to be solved by the present invention is to provide a shooting method and apparatus for solving the problem that the related art star track takes a long time and helps the photographer to shoot a complete star track image in a short time. .
  • a method for processing a star track photograph comprising the following steps:
  • the center of the star track of the current shooting is calculated according to any segment of the star track in the composite image
  • the step of calculating the center of the star track of the current shooting according to any segment of the star track in the composite image includes:
  • the step of extending each segment of the star-track arc in the composite image around the center of the circle to obtain a complete star-track rendering includes:
  • Each segment of the star track in the composite image is extended around the center of the star in the star track region.
  • the step of identifying the star track zone and the non-star track zone in the composite image includes:
  • the pixel point is a pixel point of the star track area, otherwise, the pixel point is determined to be a pixel point of the non-star track area.
  • the step of identifying the star track zone and the non-star track zone in the composite image includes:
  • the C step includes:
  • step C1 determining that the first pixel and the last pixel in each row are abrupt pixels, and The first pixel begins to perform step C2;
  • step C2 sequentially calculating an absolute value of a luminance difference between adjacent pixel points, and determining whether an absolute value of a luminance difference between the current pixel point and a subsequent adjacent pixel point exceeds a first preset threshold, and if so, Perform step C3;
  • the method further includes:
  • step S1 includes:
  • the user determines whether to enable the quick shooting mode and set the shooting time of the fast shooting mode according to actual needs.
  • step S2 includes:
  • the timer is turned on at the beginning of shooting
  • a photographing apparatus comprising a center determining unit and a processing unit, wherein:
  • the center determining unit is configured to: after the end of the star track shooting, calculate the center of the star track of the current shooting according to any segment of the star track in the composite image;
  • the processing unit is configured to: surround each segment of the star track arc in the composite image The center of the meta-calculation is extended to obtain a complete star-track rendering.
  • the center determining unit is configured to calculate the center of the star track of the current shooting according to any segment of the star track in the composite image as follows:
  • the processing unit is configured to extend each segment of the star-track arc in the composite image around the center of the circle to obtain a complete star-track rendering:
  • Each segment of the star track in the composite image is extended around the center of the star in the star track region.
  • the processing unit is configured to identify the star track zone and the non-star track zone in the composite image as follows:
  • the processing unit is configured to identify the star track zone and the non-star track zone in the composite image as follows:
  • the change of the brightness value in each row of pixels is found to be super a sudden pixel point of the first preset threshold
  • the processing unit is configured to: according to the obtained brightness value of each pixel point, find a sudden pixel point in which the change of the brightness value in each row of pixels exceeds the first preset threshold:
  • step C1 determining that the first pixel and the last pixel in each row are abrupt pixels, and performing step C2 from the first pixel;
  • step C2 sequentially calculating an absolute value of a luminance difference between adjacent pixel points, and determining whether an absolute value of a luminance difference between the current pixel point and a subsequent adjacent pixel point exceeds a first preset threshold, and if so, Perform step C3;
  • the device further includes a detecting unit and a control unit, wherein
  • the detecting unit is configured to: detect whether to enable the fast shooting mode when entering the star track shooting mode;
  • the control unit is configured to: when the detecting unit detects that the quick shooting mode is turned on, control the shooting device to end the star track shooting when the shooting is performed to a preset time.
  • the device further includes a setting unit, wherein
  • the setting unit is configured to: determine whether to enable the fast shooting mode according to actual needs, and set the shooting time of the fast shooting mode by setting the function button of the fast shooting mode to be turned on.
  • control unit is configured to control the photographing device to end the star track shooting when the detecting unit detects that the fast shooting mode is turned on when the detecting unit reaches a preset time as follows:
  • the timer When the quick shooting mode is turned on, the timer is turned on at the start of shooting, and it is judged whether the timer has reached the preset time, and the shooting is stopped when the timer counts up to the preset time.
  • a computer program comprising program instructions that, when executed by a computer, cause the computer to perform any of the above-described methods of star-tracking processing.
  • a method and device for processing a star track of the technical solution of the present invention can determine the center of the star track of the current shooting only according to the star track arc of any star track arc when shooting the star track, and then The star-track arcs in the composite image extend around the center of the circle to obtain a complete star-track rendering, thus enabling the photographer to capture a complete star-track image in a shorter period of time. And when each segment of the star-track arc in the composite image is extended around the center of the circle, the star-track region and the non-star-track region in the composite image may be distinguished, and the arcs of each segment of the star track are extended only in the star-track region. The resulting star-track renderings are more in line with the actual shooting results.
  • FIG. 1 is a schematic block diagram of a camera device according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a method for photographing according to an embodiment of the present invention.
  • FIG. 3 is a flow chart of step S201 of Figure 2;
  • FIG. 4 is a schematic diagram of an implementation method of step S201 in FIG. 2;
  • FIG. 5 is a flow chart of a method 1 for identifying a star track area and a non-star track area in the composite image in the embodiment shown in FIG. 2;
  • FIG. 6 is a flow chart of a second method for identifying a star track zone and a non-star track zone in the composite image in the embodiment shown in FIG. 2.
  • an embodiment of the present invention provides a photographing apparatus.
  • the photographing apparatus includes a detecting unit 101, a control unit 102, a center determining unit 103, and a processing unit 104.
  • the camera collects an image every preset time; determines whether the brightness of the pixel in the current image at the same position is greater than the brightness of the pixel in the image obtained in the past; if so, the The pixels in the same position in the image are replaced with the pixels in the current image, and the synthesis of the star track image is performed accordingly.
  • the star track in the complete star-track image is composed of multiple concentric circles around the same center.
  • the detecting unit 101 is configured to detect whether the fast shooting mode is turned on when entering the star track shooting mode.
  • the device further includes a setting unit (not shown), wherein the setting unit is configured to: determine whether to enable the fast shooting mode according to actual needs, and set the fast shooting mode by setting the quick shooting mode function entry to be turned on. filming time.
  • the control unit 102 is configured to: when the detecting unit 101 detects that the quick shooting mode is turned on, control the shooting device to end the star track shooting when the shooting is performed to a preset time.
  • control unit 102 can implement control of the shooting time by a timer. At this time, the control unit 102 is further configured to: when the fast shooting mode is turned on, turn on the timer at the start of shooting, and determine whether the timing of the timer reaches a preset time, and set to: the timing of the timer is reached. Shooting stops at a preset time.
  • the center determining unit 103 is configured to: after the end of the star track shooting, calculate the center of the star track of the current shooting according to any of the star track arcs in the composite image.
  • the method for determining, by the processing unit 104, the center of the star track of the current shooting according to the star track in the composite image is as shown in FIG. 4, and the details are as follows:
  • the processing unit 104 is configured to: extend each segment of the star track arc in the center of the circle calculated by the calculating unit to obtain a complete star track rendering.
  • the processing unit 104 extends the segment of the star track in the composite image to obtain a complete star track rendering image, and is further configured to: identify the star track region and the non-star track region in the composite image, and Each segment of the star track in the composite image is extended around the center of the star in the star track region.
  • the processing unit 104 can identify the star track zone and the non-star track zone by two methods.
  • Obtaining a range of brightness values of the pixels in the star track area and scanning the pixels in the star track image row by row, obtaining brightness values of each pixel point, and determining whether the brightness value of each pixel point is in the Within the range of the brightness value, and configured to: determine that the pixel point is a pixel point of the star track area when it is determined that the size of the brightness value of each pixel point is within the brightness value range; otherwise, determining the Pixels are pixels of a non-star track area.
  • the processing unit 104 is further configured to: determine, by performing the following steps, a pixel point in the non-star-track region of the captured star-track image: A, obtain a range of brightness values of the pixel points of the star-track region; B, and the star track The pixel points in the image are scanned row by row to obtain the brightness value of each pixel point; C. According to the obtained brightness value of each pixel point, the mutation of the brightness value in each row of pixel points exceeds the first preset threshold value.
  • D determining that the magnitude of the luminance value between adjacent abrupt pixel points of each row exceeds the number of pixels of the luminance value range and all pixel points between the adjacent abrupt pixel points Whether the percentage of the quantity is greater than a preset second threshold value, and if so, determining that the pixel point between the adjacent abrupt pixel points is a pixel point of the non-star-track area, otherwise determining the adjacent mutant image
  • the pixel between the prime points is the pixel of the star track area.
  • pixels A1-A100 there are 100 pixels between pixels A1-A100, and the brightness value of 10 pixels (A5, A12, A15, ...) exceeds the brightness value range, the percentage is 10%, which is less than the second threshold, then A1 is judged.
  • -A100 is the star track area;
  • B1-B100 There are 100 pixels between the pixels B1-B100, and the brightness value of 70 pixels exceeds the brightness value range, and the percentage is 70%. If the value is greater than the second threshold, it is judged that B1-B100 is a non-star track area.
  • the processing unit 104 is further configured to: according to the obtained brightness value of each pixel point, find a sudden pixel point in which the change of the brightness value in each row of pixels exceeds the first preset threshold. : C1, determining that the first pixel and the last pixel in each row are abrupt pixels, and performing step C2 from the first pixel; C2, sequentially calculating brightness between adjacent pixels An absolute value of the difference, and determining whether an absolute value of a luminance difference between the current pixel point and a subsequent adjacent pixel point exceeds a first preset threshold, and if yes, performing step C3; C3, sequentially calculating the current pixel point and The absolute value of the brightness difference of the subsequent pixel points, and determines whether the current pixel point is the last pixel point, and if so, stops the calculation, if otherwise, until another pixel point whose absolute value of the brightness difference is less than the first preset threshold value is found And determining whether the number of N pixel points spaced between the other pixel point and the current
  • a row of pixels C1-C100 determine C1, C100 as abrupt pixel points
  • the processing unit 104 when it extends the star track in the composite image around the center of the star track, it may extend from one end of the arc or simultaneously from both ends of the arc. Extend; you can also copy the arc of the segment of the star track first, and then repeatedly paste the arc on the circumference of the segment of the star track to make it more realistic.
  • the processing unit 104 may also scan the pixels in the star track image row by row and read the brightness values of the pixels with the same distance.
  • the first preset threshold, the second preset threshold, and the range of brightness values of the satellite track pixels can be obtained based on experimental data.
  • the range of brightness values of the pixels in the star track area can also be obtained by statistically counting the brightness values of the pixels in the first row of the star track image during scanning.
  • the device can also set a display unit, which is set to: display a complete star track rendering.
  • the photographing device of the embodiment can turn on the fast shooting mode when performing the star track shooting, and when the fast shooting mode is turned on, the shooting can be stopped only by shooting the preset time, and then the composite image when the shooting is stopped is acquired. Determining the center of the star track of the current shooting according to the star track arc in the composite image, and then extending the arc of each star track in the composite image around the center of the circle to obtain a complete star track rendering image, thereby enabling The photographer takes a complete star track image in a short period of time.
  • the star-track region and the non-star-track region in the composite image may be distinguished, and the arcs of each segment of the star track are extended only in the star-track region.
  • the resulting star-track renderings are more in line with the actual shooting results.
  • an embodiment of the present invention provides a shooting method.
  • the method process includes:
  • the steps include:
  • the star track area and the non-star track area in the composite image may also be identified; and each segment of the star track in the composite image is extended around the center of the star track area.
  • identifying the star-track region and the non-star-track region in the composite image can be implemented in two ways.
  • method one includes:
  • S402. Perform a row-by-row scan on the pixel points in the image of the star track to obtain a brightness value of each pixel point.
  • Method 2 includes:
  • pixels A1-A100 there are 100 pixels between pixels A1-A100, and the brightness value of 10 pixels (A5, A12, A15, ...) exceeds the brightness value range, the percentage is 10%, which is less than the second threshold, then A1 is judged.
  • -A100 is the star track area;
  • B1-B100 There are 100 pixels between pixels B1-B100, and 70 of them have brightness values exceeding The brightness value range, the percentage is 70%, and is greater than the second threshold, then it is determined that B1-B100 is a non-satellite track area.
  • step C includes the following steps C1-C3.
  • step C1 determining that the first pixel and the last pixel in each row are abrupt pixels, and performing step C2 from the first pixel;
  • step C2 sequentially calculating an absolute value of a luminance difference between adjacent pixel points, and determining whether an absolute value of a luminance difference between the current pixel point and a subsequent adjacent pixel point exceeds a first preset threshold, and if so, Perform step C3;
  • a row of pixels C1-C100 determine C1, C100 as abrupt pixel points
  • the embodiment may further include the following steps:
  • the fast shooting mode function entry can be turned on by setting, and the user determines whether to enable the fast shooting mode according to actual needs, and set the shooting time of the fast shooting mode.
  • the step includes:
  • the timer is turned on at the beginning of shooting
  • the related art utilizes a digital camera (especially a mobile terminal) to take a star track
  • multiple images are taken in a long time multiple exposure mode, and the current captured image and the previous image are taken during the shooting process.
  • the synthesis process is performed so that when the shooting is completed, the synthesized star track image can be directly obtained. Therefore, when the shooting is stopped in this embodiment, the current composite image is acquired as the image after the last image captured and the previous image (ie, the previous composite image).
  • the fast shooting mode can be turned on when the star track is taken, and when the fast shooting mode is turned on, the shooting can be stopped only by shooting the preset time, and then the composite image when the shooting is stopped is acquired. Determining the center of the star track of the current shooting according to the star track arc in the composite image, and then extending the arc of each star track in the composite image around the center of the circle to obtain a complete star track rendering image, thereby enabling The photographer takes a complete star track image in a short period of time.
  • the star-track region and the non-star-track region in the composite image may be distinguished, and the arcs of each segment of the star track are extended only in the star-track region.
  • the resulting star-track renderings are more in line with the actual shooting results.
  • the embodiment of the invention also discloses a computer program, comprising program instructions, which when executed by a computer, enable the computer to execute any of the above-mentioned star track shooting processing methods.
  • the embodiment of the invention also discloses a carrier carrying the computer program.
  • a method and device for processing a star track of the technical solution of the present invention can determine the center of the star track of the current shooting only according to the star track arc of any star track arc when shooting the star track, and then The star-track arcs in the composite image extend around the center of the circle to obtain a complete star-track rendering, thus enabling the photographer to capture a complete star-track image in a shorter period of time. And when each segment of the star-track arc in the composite image is extended around the center of the circle, the star-track region and the non-star-track region in the composite image may be distinguished, and the arcs of each segment of the star track are extended only in the star-track region. The resulting star-track renderings are more in line with the actual shooting results. Therefore, the present invention has strong industrial applicability.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Analysis (AREA)

Abstract

L'invention concerne un procédé et un dispositif de traitement de prise de vue de filés d'étoiles. Le procédé comprend les étapes suivantes : une fois que la prise de vue de filé d'étoile est terminée, calculer un centre d'un cercle d'une prise de vue de filé d'étoile cette fois en fonction d'une section quelconque d'un arc de filé d'étoile sur une image de synthèse ; et étendre, autour du centre d'un cercle, chaque section de l'arc de filé d'étoile dans l'image de synthèse pour acquérir une image complète de l'effet de filé d'étoile. Grâce au procédé et au dispositif de la solution technique de la présente invention, un photographe peut obtenir une image complète de filé d'étoile en un temps relativement court, raccourcissant ainsi le temps de prise de vue.
PCT/CN2015/087703 2014-08-26 2015-08-20 Procédé et dispositif de traitement de prise de vue de filés d'étoiles WO2016029822A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201410426049.3A CN104333691B (zh) 2014-08-26 2014-08-26 一种星轨拍摄处理方法及装置
CN201410426049.3 2014-08-26
CN201510487280.8 2015-08-10
CN201510487280 2015-08-10

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WO2016029822A1 true WO2016029822A1 (fr) 2016-03-03

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101617530A (zh) * 2007-12-21 2009-12-30 索尼株式会社 图像处理设备、动态画面再现设备及其处理方法和程序
US20120257071A1 (en) * 2011-04-06 2012-10-11 Prentice Wayne E Digital camera having variable duration burst mode
CN103905730A (zh) * 2014-03-24 2014-07-02 深圳市中兴移动通信有限公司 移动终端的拍摄方法和移动终端
CN103942754A (zh) * 2013-01-18 2014-07-23 深圳市腾讯计算机系统有限公司 全景图像补全方法及装置
CN104333691A (zh) * 2014-08-26 2015-02-04 深圳市中兴移动通信有限公司 一种星轨拍摄处理方法及装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101617530A (zh) * 2007-12-21 2009-12-30 索尼株式会社 图像处理设备、动态画面再现设备及其处理方法和程序
US20120257071A1 (en) * 2011-04-06 2012-10-11 Prentice Wayne E Digital camera having variable duration burst mode
CN103942754A (zh) * 2013-01-18 2014-07-23 深圳市腾讯计算机系统有限公司 全景图像补全方法及装置
CN103905730A (zh) * 2014-03-24 2014-07-02 深圳市中兴移动通信有限公司 移动终端的拍摄方法和移动终端
CN104333691A (zh) * 2014-08-26 2015-02-04 深圳市中兴移动通信有限公司 一种星轨拍摄处理方法及装置

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