WO2016101524A1 - 纠正被摄物体拍摄倾斜方法、装置及移动终端、存储介质 - Google Patents

纠正被摄物体拍摄倾斜方法、装置及移动终端、存储介质 Download PDF

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WO2016101524A1
WO2016101524A1 PCT/CN2015/079509 CN2015079509W WO2016101524A1 WO 2016101524 A1 WO2016101524 A1 WO 2016101524A1 CN 2015079509 W CN2015079509 W CN 2015079509W WO 2016101524 A1 WO2016101524 A1 WO 2016101524A1
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subject
contour
straightening
picture
determined
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PCT/CN2015/079509
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English (en)
French (fr)
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张宇
周洁
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中兴通讯股份有限公司
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Priority to US15/538,502 priority Critical patent/US10313596B2/en
Publication of WO2016101524A1 publication Critical patent/WO2016101524A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T3/00—Geometric image transformations in the plane of the image
    • G06T3/60—Rotation of whole images or parts thereof
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/80—Geometric correction
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/194—Segmentation; Edge detection involving foreground-background segmentation
    • 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
    • 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
    • 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
    • H04N23/69—Control of means for changing angle of the field of view, e.g. optical zoom objectives or electronic zooming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80—Camera processing pipelines; Components thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/2621—Cameras specially adapted for the electronic generation of special effects during image pickup, e.g. digital cameras, camcorders, video cameras having integrated special effects capability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/2628—Alteration of picture size, shape, position or orientation, e.g. zooming, rotation, rolling, perspective, translation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10024—Color image
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/0077—Types of the still picture apparatus
    • H04N2201/0084—Digital still camera
    • 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
    • H04N23/67—Focus control based on electronic image sensor signals

Definitions

  • the present invention relates to the field of mobile terminals, and in particular, to a method, a device, a mobile terminal, and a computer storage medium for correcting a tilt of a subject due to a shooting angle when the mobile terminal takes a picture.
  • the user opens the photographed photos into the computer or mobile phone library and opens them.
  • Use the drawing software in the computer or the mobile phone photo editing software to select the corners of the image to pull the rectangle into a trapezoidal object, and the solution can It plays the role of tilting straightening, but it belongs to the editing of pictures in the gallery after the shooting is completed, there are steps such as importing picture editing, the process is complicated, and many users often do not know how to edit the operation, and the final effect can not achieve a timely rendering effect. .
  • one shot save, one edit save, the implementation steps are numerous, the convenience is poor, many non-professional users are difficult to master, can not achieve the desired results.
  • Embodiments of the present invention are desirably providing a method, apparatus, and mobile terminal for correcting a tilt of a subject, to at least solve the problem of taking a rectangular subject into a trapezoid due to a shooting angle problem.
  • a method of correcting a tilt of a subject comprising:
  • the boundary of the contour of the object is recognized to obtain a contour of the object
  • the subject is subjected to straightening shooting processing to obtain a straightened picture of the subject.
  • the boundary of the contour of the object is recognized to obtain a contour of the object, including:
  • the boundary of the contour of the subject is recognized to obtain the contour of the subject.
  • the analyzing the contour of the object to determine whether the object is tilted comprises:
  • Determining whether the subject is photographed as a trapezoid by determining whether the contour of the object has and has only two parallel sides;
  • the trapezoidal subject needs to be subjected to the straightening shooting process.
  • the subject is subjected to straightening shooting processing to obtain a straightened picture of the subject, including:
  • an oblique picture of the subject is obtained according to the received shooting instruction
  • the performing the first operation on the object determined to be subjected to the straightening shooting process includes:
  • An arrow pointing from the two corner points of the short parallel side of the subject contour to the auxiliary line for indicating the direction of movement of the two corner points of the short parallel side is respectively set.
  • performing the second operation on the tilted picture of the object to obtain a straightened picture of the object including:
  • an apparatus for correcting a tilt of a subject comprising:
  • the identification module is configured to: after detecting that the object enters the framing interface, the boundary of the contour of the object is recognized to obtain a contour of the object;
  • An analysis module configured to analyze the contour of the object to determine whether the object is tilted
  • the straightening module is configured to perform a straightening shooting process on the subject to obtain a straightened picture of the subject if it is determined to be tilted.
  • the parsing module further includes:
  • a first determining sub-module configured to determine whether the subject is photographed as a trapezoid by determining whether the contour of the object has and only two parallel sides;
  • the second determining sub-module is configured to further determine whether the straightening shooting process is required if it is determined that the subject is photographed as a trapezoid.
  • the straightening module further includes:
  • a first operation sub-module configured to obtain a tilt image of the object according to the received photographing instruction after performing the first operation on the object determined to be subjected to the straightening shooting process
  • the second operation submodule is configured to perform a second operation on the tilted picture of the object to obtain a straightened picture of the object.
  • An embodiment of the present invention provides a computer storage medium, where the computer storage medium stores computer executable instructions for performing the foregoing method for correcting a tilt of a subject.
  • a mobile terminal including a camera and a processor, configured to, after the processor detects that a subject enters a view interface of the camera, Identifying the boundary of the contour of the object to obtain the contour of the object; analyzing the contour of the object to determine whether the object is tilted; if it is determined to be tilting, straightening the subject Processing to obtain a straightened picture of the subject.
  • an advantageous effect of the embodiment of the present invention is that a method for providing a mobile terminal built-in algorithm program can enable the mobile terminal to correct the tilt of the projected rectangular plane object caused by the shooting angle when photographing. .
  • FIG. 1 is a schematic diagram of a method for correcting a tilt of a subject to be photographed according to an embodiment of the present invention
  • FIG. 2 is a structural diagram of a device for correcting a tilt of a subject to be photographed according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a display for correcting a tilt of a subject according to an embodiment of the present invention
  • FIG. 4 is a flow chart showing the operation of correcting the tilt of the subject by the embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a method for correcting a tilt of a subject according to an embodiment of the present invention, as shown in FIG. 1 , the specific steps are as follows:
  • Step S101 After the mobile terminal detects that the subject enters the framing interface, the boundary of the contour of the object is recognized to obtain a contour of the object.
  • step S101 the color and brightness between the subject and the background are compared, and the boundary of the subject contour is recognized to obtain a subject contour. Since there is a difference in color and brightness between the object and the shooting background, according to the difference, the boundary of the contour of the object can be recognized, and the contour of the object can be obtained.
  • Step S102 Analyze the contour of the subject to determine whether the subject is tilted.
  • step S102 it is determined whether the subject is photographed as a trapezoid by determining whether the contour of the object has and only two parallel sides;
  • the step of further determining whether the straightening shooting process is required is:
  • the trapezoidal subject needs to be subjected to the straightening shooting process.
  • Step S103 If it is determined to be tilted, the subject is subjected to straightening shooting processing to obtain a straightened picture of the subject.
  • step S103 after performing the first operation on the subject determined to be subjected to the straightening shooting process, an oblique picture of the subject is obtained according to the received shooting instruction;
  • the step of performing the first operation on the subject determined to be subjected to the straightening shooting process comprises:
  • An arrow pointing from the two corner points of the short parallel side of the subject contour to the auxiliary line for indicating the direction of movement of the two corner points of the short parallel side is respectively set.
  • the step of performing a second operation on the tilted picture of the object to obtain a straightened picture of the object includes:
  • the subject is subjected to straightening shooting processing to obtain a straightened picture of the subject.
  • the computer storage medium is, for example, a read only memory ROM/random memory RAM, a magnetic disk, an optical disk, or the like.
  • FIG. 2 is a structural diagram of a device for correcting a tilt of a subject according to an embodiment of the present invention. As shown in FIG. 2, the method includes: an identification module 201, a parsing module 202, and a straightening module 203;
  • the identification module 201 is configured to recognize the boundary of the object contour after detecting that the object enters the framing interface, to obtain a contour of the object.
  • the parsing module 202 is configured to parse the contour of the object to determine whether the object is tilted.
  • the first determining sub-module of the parsing module 202 is configured to determine whether the subject is captured as a trapezoid by determining whether the contour of the object has and only two parallel sides.
  • the second determining sub-module of the parsing module 202 is configured to further determine whether the straightening shooting process needs to be performed if it is determined that the subject is captured as a trapezoid.
  • the straightening module 203 is configured to perform a straightening shooting process on the subject to determine a tilt, and obtain a straightened picture of the subject.
  • the first operation sub-module of the straightening module 203 is configured to obtain a tilt image of the object according to the received shooting instruction after performing the first operation on the object determined to be subjected to the straightening shooting process.
  • the second operation submodule of the straightening module 203 is configured to perform a second operation on the tilted picture of the object to obtain a straightened picture of the object.
  • the identification module 201, the parsing module 202, and the straightening module 203 may each be a central processing unit (CPU), or a digital signal processing (DSP), or a microprocessor (MPU). , Micro Processor Unit), or Field Programmable Gate Array (FPGA).
  • CPU central processing unit
  • DSP digital signal processing
  • MPU microprocessor
  • FPGA Field Programmable Gate Array
  • FIG. 3 is a schematic diagram of a display for correcting the tilt of a subject according to an embodiment of the present invention.
  • the camera Camera function list select whether to enable the tilt straight function, such as If the option is off, the function is invalid. If you select On, the tilt-straighten function in the Camera camera function menu is enabled.
  • the specific implementation steps are as follows:
  • the background recognizes the contour shape of the subject by detecting the difference between the contour boundary of the subject and the background color and brightness.
  • Fig. 3(b) As shown in Fig. 3(b), it belongs to the background judgment and is not displayed on the mobile phone screen.
  • the background determines whether the object is parallel or not, and only two sides are parallel to each other, and it is judged whether the object is trapezoidal.
  • Figure 3 (d) it belongs to the background processing process and is not displayed on the mobile phone screen.
  • the mobile phone captures the object in the finder frame, and the background recognizes the contour according to the detected trapezoidal object, and separates it from the background.
  • the auxiliary line the two short sides of the two sides are parallel to each other.
  • the corner points are respectively horizontally or vertically stretched to the vertical auxiliary line closest to each other.
  • the trapezoidal subject image in the photo changes as the corner points are stretched, similar to the deformation tool function in the image processing tool such as PS.
  • FIG. 4 is a flow chart showing the operation of correcting the tilt of the subject by the embodiment of the present invention.
  • the tilt straight function has a function switch option in the camera camera application of the mobile phone.
  • the user can control the opening or closing of the Camera application by turning the function switch option on or off.
  • the specific workflow is as follows:
  • Step S401 The mobile phone is currently in a standby state.
  • Step S402 It is determined whether the camera Camera is activated to take a photo.
  • Step S403 When it is determined that the camera Camera has been activated, the framing interface is entered.
  • the framing interface refers to the interface displayed on the display of the mobile phone after the camera Camera application is activated.
  • Step S404 It is determined whether the tilt straightening function is activated.
  • Step S405 When it is determined that the tilt straightening function is started, the framing focus is performed, and the background is detected by analyzing the difference between the contour boundary of the object and the background color, the gradation, the brightness, and the like, and the contour shape of the object is recognized.
  • Step S406 detecting whether the contour of the object is present and only two sides are parallel, and determining whether it is a trapezoid. If it is not trapezoidal, it returns to step S403.
  • Step S407 If it is a trapezoid, it is determined whether the position and area of the contour of the object satisfy the preset condition. If the preset condition is not satisfied, the process returns to step S403. Among them, the preset condition can be set to the subject in the center position, and the area exceeds 25% of the screen.
  • Step S408 When the preset condition is satisfied, a framing point line frame for delineating the contour of the subject is displayed in the finder frame, and the outline of the object is outlined by the wire frame, and the passing angle is set at the long corner point of the two sides parallel to each other. A vertical auxiliary line perpendicular to the long side and an arrow indicating the corner point and direction to be moved.
  • Step S409 It is judged whether or not photographing is confirmed.
  • Step S410 automatically stretching the trapezoidal object into a rectangle according to the auxiliary line, and obtaining an effect similar to the picture stretching tool in the PS.
  • the background is based on
  • the detected trapezoidal object recognizes the contour and separates it from the background.
  • the auxiliary line the two corner points of the short sides of the two sides parallel to each other are horizontally or vertically stretched to the nearest vertical auxiliary. on-line.
  • the trapezoidal subject image changes as the corner points are stretched, similar to the function of the deformation tool in the image processing tool such as PS.
  • Step S411 The background automatic cropping screen only retains the rectangular area. After cropping in the background, only the stretched rectangular object is retained.
  • Step S412 Save the photo.
  • the rectangular object is presented and saved, so as to achieve the unique photographic effect required by the user for the retreading and scanning of the planar rectangular object, and enhance the user experience of shooting objects such as paintings, posters, documents and the like.
  • the embodiment of the present invention has the following technical effects: by providing a method for the built-in algorithm program of the mobile terminal, the mobile terminal can correct the tilt of the projected rectangular plane object caused by the shooting angle when photographing, thereby A technical overlay synthesis tailored to the user is implemented, so that the user can edit the tilted object that he wants to shoot when the view is taken, and the image can be presented after the shot is taken, eliminating the step of editing later.
  • the position and area judgment are added to the recognition of the contour of the object, which avoids the interference of the secondary object, greatly improves the accuracy, and makes the user feel that the camera Camera is more convenient and more humanized, and provides a better photo for the user.
  • the mobile terminal can correct the tilt of the projected rectangular plane object caused by the shooting angle when photographing, thereby A technical overlay synthesis tailored to the user is implemented, so that the user can edit the tilted object that he wants to shoot when the view is taken, and the image can be presented after the shot is taken, eliminating the step of editing later.
  • each processing module in the apparatus for correcting the tilt of the subject shown in FIG. 2 can be understood with reference to the related description of the method of correcting the tilt of the subject. It should be understood by those skilled in the art that the functions of the processing units in the apparatus for correcting the tilt of the subject image shown in FIG. 2 can be implemented by a program running on the processor, or can be realized by a specific logic circuit.
  • embodiments of the present invention can be provided as a method, system, Or a computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本发明实施例公开了一种纠正被摄物体拍摄倾斜的方法、装置及移动终端、计算机存储介质；其中，所述方法包括：当移动终端检测到被摄物体进入取景界面后，对被摄物体轮廓的边界进行识别，得到被摄物体轮廓；对所述被摄物体轮廓进行解析，判断所述被摄物体是否倾斜；若判断为倾斜，则对所述被摄物体进行拉直拍摄处理，得到被摄物体的拉直图片。

Description

纠正被摄物体拍摄倾斜方法、装置及移动终端、存储介质 技术领域
本发明涉及移动终端领域，特别涉及一种在移动终端拍照时，纠正由于拍摄角度带来被摄物体倾斜的方法、装置及移动终端、计算机存储介质。
背景技术
当用户使用手机拍摄书画作品、宣传海报、文档等平面矩形物体时，常常因为无法将相机放置在与物体平面垂直的物体中心点的垂线上，由于透视关系导致矩形物体拍摄后在画面上呈现为梯形，严重影响美观，造成用户体验感较差。
当前手机类终端产品的摄像机Camera应用中尚无纠正因为拍摄角度造成被摄物体平面倾斜的功能，用户想要避免被摄物体平面倾斜通常有两种解决方案：
(1)尽量使手机摄像头位于与物体平面垂直的物体中心点的垂线上。但是如果被摄物体面积过大或者放置在地上，就很难做到，或者俯拍时会把自己的脚拍进去。
(2)用户将拍摄好的照片导入电脑或者手机图库后打开，用电脑里的绘图软件或手机图片编辑软件选取图片角点将已经透视变成为梯形的物体拉回矩形，该解决方案虽然能起到倾斜拉直的作用，但属于拍摄完成后在图库里编辑图片，存在导入图片编辑等步骤，过程繁杂，导致很多用户往往不知道如何编辑操作，而且最终效果也不能达到一次及时呈现的效果。对于用户来说，一次拍摄保存，一次编辑保存，实现起来步骤繁多，便捷性较差，很多非专业用户难以掌握，不能达到预期的效果。
通过分析我们可以看出，上述两种通过物理，或软件实现的解决方案，无论是便捷性还是可操作性都不高，用户体验感较差。
发明内容
本发明实施例期望提供一种纠正被摄物体拍摄倾斜的方法、装置及移动终端，以至少解决由于拍摄角度问题将矩形被摄物体拍成梯形的问题。
根据本发明实施例的一个方面，提供了一种纠正被摄物体拍摄倾斜的方法，所述方法包括：
当移动终端检测到被摄物体进入取景界面后，对被摄物体轮廓的边界进行识别，得到被摄物体轮廓；
对所述被摄物体轮廓进行解析，判断所述被摄物体是否倾斜；
若判断为倾斜，则对所述被摄物体进行拉直拍摄处理，得到被摄物体的拉直图片。
上述方案中，所述的对被摄物体轮廓的边界进行识别，得到被摄物体轮廓，包括：
对比被摄物体与背景之间的色彩和明度，对被摄物体轮廓的边界进行识别，得到被摄物体轮廓。
上述方案中，所述的对所述被摄物体轮廓进行解析，判断所述被摄物体是否倾斜，包括：
通过判断被摄物体轮廓是否有且只有两条平行边，确定所述被摄物体是否被拍摄为梯形；
若确定所述被摄物体被拍摄为梯形，则进一步判断是否需要进行拉直拍摄处理。
上述方案中，所述的若确定所述被摄物体被拍摄为梯形，则进一步判断是否需要进行拉直拍摄处理，包括：
判断所述被摄物体是否处于取景界面的中心位置，并且所述被摄物体面积是否超过取景界面的预置百分比；
若所述被摄物体处于取景界面的中心位置，并且所述被摄物体面积超 过取景界面的预置百分比，则确定所述梯形被摄物体需要进行拉直拍摄处理。
上述方案中，所述的若判断为倾斜，则对所述被摄物体进行拉直拍摄处理，得到被摄物体的拉直图片，包括：
对确定为需要进行拉直拍摄处理的被摄物体进行第一操作后，根据接收的拍摄指令，得到被摄物体的倾斜图片；
对所述被摄物体的倾斜图片进行第二操作，得到被摄物体的拉直图片。
上述方案中，所述的对确定为需要进行拉直拍摄处理的被摄物体进行第一操作，包括：
设置分别通过所述被摄物体轮廓的长平行边的两个角点的，且与所述长平行边垂直的辅助线；
设置由所述被摄物体轮廓的短平行边的两个角点分别指向所述辅助线的，用于指示所述短平行边的两个角点移动方向的箭头。
上述方案中，所述的对所述被摄物体的倾斜图片进行第二操作，得到被摄物体的拉直图片，包括：
根据所述被摄物体轮廓，分离所述被摄物体和背景得到倾斜的被摄物体画面；
根据所述用于指示所述短平行边的两个角点移动方向的箭头，对所述倾斜的被摄物体画面进行拉直，得到被摄物体的拉直图片。
根据本发明实施例的另一方面，提供了一种纠正被摄物体拍摄倾斜的装置，包括：
识别模块，配置为当移动终端检测到被摄物体进入取景界面后，对被摄物体轮廓的边界进行识别，得到被摄物体轮廓；
解析模块，配置为对所述被摄物体轮廓进行解析，判断所述被摄物体是否倾斜；
拉直模块，配置为若判断为倾斜，则对所述被摄物体进行拉直拍摄处理，得到被摄物体的拉直图片。
上述方案中，所述解析模块进一步包括：
第一判断子模块，配置为通过判断被摄物体轮廓是否有且只有两条平行边，确定所述被摄物体是否被拍摄为梯形；
第二判断子模块，配置为若确定所述被摄物体被拍摄为梯形，则进一步判断是否需要进行拉直拍摄处理。
上述方案中，所述拉直模块进一步包括：
第一操作子模块，配置为对确定为需要进行拉直拍摄处理的被摄物体进行第一操作后，根据接收的拍摄指令，得到被摄物体的倾斜图片；
第二操作子模块，配置为对所述被摄物体的倾斜图片进行第二操作，得到被摄物体的拉直图片。
本发明实施例提供一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，所述计算机可执行指令用于执行前述的纠正被摄物体拍摄倾斜的方法。
根据本发明实施例的另一方面，提供了一种移动终端，包括照相机以及处理器，所述处理器，配置为当所述处理器检测到被摄物体进入所述照相机的取景界面后，对被摄物体轮廓的边界进行识别，得到被摄物体轮廓；对所述被摄物体轮廓进行解析，判断所述被摄物体是否倾斜；若判断为倾斜，则对所述被摄物体进行拉直拍摄处理，得到被摄物体的拉直图片。
与现有技术相比较，本发明实施例的有益效果在于：能够通过提供一种移动终端内置算法程序的方法，使得移动终端在拍照时能够纠正因为拍摄角度所造成的被摄矩形平面物体画面倾斜。
附图说明
图1是本发明实施例提供的纠正被摄物体拍摄倾斜的方法原理图；
图2是本发明实施例提供的纠正被摄物体拍摄倾斜的装置结构图；
图3是本发明实施例提供的纠正被摄物体拍摄倾斜的显示示意图；
图4是本发明实施例提供的纠正被摄物体拍摄倾斜的工作流程图。
具体实施方式
以下结合附图对本发明的优选实施例进行详细说明，应当理解，以下所说明的优选实施例仅用于说明和解释本发明，并不用于限定本发明。
图1是本发明实施例提供的纠正被摄物体拍摄倾斜的方法原理图，如图1所示，具体步骤如下：
步骤S101：当移动终端检测到被摄物体进入取景界面后，对被摄物体轮廓的边界进行识别，得到被摄物体轮廓。
在步骤S101中，对比被摄物体与背景之间的色彩和明度，对被摄物体轮廓的边界进行识别，得到被摄物体轮廓。由于被摄物体与拍摄背景之间在色彩和明度等方面会将存在有不同，依据该不同，可识别出被摄物体轮廓的边界，进而得到被摄物体轮廓。
步骤S102：对所述被摄物体轮廓进行解析，判断所述被摄物体是否倾斜。
在步骤S102中，通过判断被摄物体轮廓是否有且只有两条平行边而确定所述被摄物体是否被拍摄为梯形；
若确定所述被摄物体被拍摄为梯形，则进一步判断是否需要进行拉直拍摄处理。
在一个实施例中，所述的若确定所述被摄物体被拍摄为梯形，则进一步判断是否需要进行拉直拍摄处理的步骤包括：
判断所述被摄物体是否处于取景界面的中心位置，并且所述被摄物体面积是否超过取景界面的预置百分比；
若所述被摄物体处于取景界面的中心位置，并且所述被摄物体面积超 过取景界面的预置百分比，则确定所述梯形被摄物体需要进行拉直拍摄处理。
步骤S103：若判断为倾斜，则对所述被摄物体进行拉直拍摄处理，得到被摄物体的拉直图片。
在步骤S103中，对确定为需要进行拉直拍摄处理的被摄物体进行第一操作后，根据接收的拍摄指令，得到被摄物体的倾斜图片；
对所述被摄物体的倾斜图片进行第二操作，得到被摄物体的拉直图片。
在一个实施例中，所述的对确定为需要进行拉直拍摄处理的被摄物体进行第一操作的步骤包括：
设置分别通过所述被摄物体轮廓的长平行边的两个角点的，且与所述长平行边垂直的辅助线；
设置由所述被摄物体轮廓的短平行边的两个角点分别指向所述辅助线的，用于指示所述短平行边的两个角点移动方向的箭头。
在一个实施例中，所述的对所述被摄物体的倾斜图片进行第二操作，得到被摄物体的拉直图片的步骤包括：
根据所述被摄物体轮廓，分离所述被摄物体和背景得到倾斜的被摄物体画面；
根据所述用于指示所述短平行边的两个角点移动方向的箭头，对所述倾斜的被摄物体画面进行拉直，得到被摄物体的拉直图片。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，所述的程序可以存储于一计算机可读取存储介质中，该程序在执行时，包括如下步骤：
(1)当计算机存储介质检测到被摄物体进入取景界面后，对被摄物体轮廓的边界进行识别，得到被摄物体轮廓；
(2)对所述被摄物体轮廓进行解析，判断所述被摄物体是否倾斜；
(3)若判断为倾斜，则对所述被摄物体进行拉直拍摄处理，得到被摄物体的拉直图片。
其中，所述的计算机存储介质，如：只读存储器ROM/随机存储器RAM、磁碟、光盘等。
图2是本发明实施例提供的纠正被摄物体拍摄倾斜的装置结构图，如图2所示，包括：识别模块201、解析模块202和拉直模块203；其中，
所述识别模块201配置为当检测到被摄物体进入取景界面后，对被摄物体轮廓的边界进行识别，得到被摄物体轮廓。
所述解析模块202配置为对所述被摄物体轮廓进行解析，判断所述被摄物体是否倾斜。其中，所述解析模块202的第一判断子模块配置为通过判断被摄物体轮廓是否有且只有两条平行边，确定所述被摄物体是否被拍摄为梯形。所述解析模块202的第二判断子模块配置为若确定所述被摄物体被拍摄为梯形，则进一步判断是否需要进行拉直拍摄处理。
所述拉直模块203配置为若判断为倾斜，则对所述被摄物体进行拉直拍摄处理，得到被摄物体的拉直图片。其中，所述拉直模块203的第一操作子模块配置为对确定为需要进行拉直拍摄处理的被摄物体进行第一操作后，根据接收的拍摄指令，得到被摄物体的倾斜图片。所述拉直模块203的第二操作子模块配置为对所述被摄物体的倾斜图片进行第二操作，得到被摄物体的拉直图片。
在实际应用中，所述识别模块201、解析模块202和拉直模块203均可由中央处理单元(CPU，Central Processing Unit)、或数字信号处理(DSP，Digital Signal Processor)、或微处理器(MPU，Micro Processor Unit)、或现场可编程门阵列(FPGA，Field Programmable Gate Array)等来实现。
图3是本发明实施例提供的纠正被摄物体拍摄倾斜的显示示意图，如图3所示，在摄像机Camera功能列表里，选择是否启用倾斜拉直功能，如 选择关闭则该功能无效，如选择开启，则开启手机摄像机Camera功能菜单中的倾斜拉直功能，具体的实现步骤如下：
(1)如图3(a)所示，进入取景界面后，后台通过检测被摄物体轮廓边界与背景色彩、明度等差异性，识别被摄物体轮廓形状。
(2)如图3(b)所示，属于后台判断，不在手机屏幕显示。后台通过检测被摄物体轮廓中是否有且只有两条边互相平行，并据此判断被摄物体是否为梯形。
(3)如图3(c)所示，经判别后，确定被摄物体是梯形且满足预设条件(位置，面积)，即判断被摄物体轮廓是否处于中心区域，面积是否超过画面的1/4，如果没有，倾斜拉直功能中止，如果条件满足，利用角点线框勾勒梯形被摄物体轮廓，并在梯形被摄物体相互平行两边的长边两角点设置与长边垂直的且通过两角点的垂直辅助线(如虚线所示)，以及用箭头表示将要移动的角点和方向。
(4)如图3(d)所示，属于后台处理过程，不在手机屏幕显示。当用户按下快门，手机拍下取景框内被摄物体，后台根据检测到的梯形被摄物体识别出轮廓，将其从背景中分离出来，依据辅助线将相互平行两边中短边的两个角点，分别水平或者竖直拉伸到离各自最近的垂直辅助线上。照片中的梯形被摄物体图像随着角点拉伸而变化，类似PS等图片处理工具中的变形工具功能。
(5)如图3(e)所示，属于后台处理过程，不在手机屏幕显示。得到拉伸后的矩形被摄物体后，通过裁剪处理仅选取拉伸后的矩形被摄物体，将周围无关画面删除。事实上，由于拍摄该类平面矩形物体时，基本以被摄物体为中心，因此，被摄物体以外画面基本可以忽略，并通过修正纠正由于拍摄角度问题被拍摄成的梯形物体。
(6)如图3(f)所示，呈现出最终经过倾斜拉直并裁剪的被摄物体的 拉直图片，并保存。
图4是本发明实施例提供的纠正被摄物体拍摄倾斜的工作流程图，如图4所示，倾斜拉直功能在手机的摄像机Camera应用中，具备功能开关选项。其中，用户可以通过功能开关选项设置开启或关闭，来控制在Camera应用中的开启或关闭。具体的工作流程如下：
步骤S401：手机当前处于待机状态。
步骤S402：判断是否启动摄像机Camera进行拍照。
步骤S403：当确定已启动摄像机Camera，进入取景界面。其中，取景界面是指启动摄像机Camera应用后，手机显示屏上所显示的界面。
步骤S404：判断是否启动倾斜拉直功能。
步骤S405：当确定启动倾斜拉直功能后，进行取景对焦，后台通过检测分析被摄物体轮廓边界与背景色彩、色阶、明度等差异性，识别被摄物体轮廓形状。
步骤S406：检测被摄物体轮廓是否有且只有两条边平行，判定其是否为梯形。如果不是梯形，返回步骤S403。
步骤S407：如果是梯形，判别被摄物体轮廓的位置、面积是否满足预设条件。如果不满足预设条件，则返回步骤S403。其中，预设条件可以设置为被摄主体处于中心位置，面积超过画面的25％。
步骤S408：当预设条件满足时，取景框出现用于勾画被摄主体轮廓的角点线框，利用线框勾勒被摄物体轮廓并在被摄物体相互平行两边的长边角点设置通过角点垂直于长边的垂直辅助线，以及用箭头表示将要移动的角点和方向。
步骤S409：判断是否确认拍摄。
步骤S410：依据辅助线，自动将梯形被摄物体拉伸成矩形，得到类似PS中的图片拉伸工具的效果。当手机拍下取景框内被摄物体后，后台根据 检测到的梯形被摄物体识别出轮廓，并将其从背景中分离出来，依据辅助线将相互平行两边中短边的两个角点，分别水平或者竖直拉伸到离各自最近的垂直辅助线上。其中，梯形被摄物体图像随着角点拉伸而变化，类似PS等图片处理工具中变形工具的功能。
步骤S411：后台自动裁剪画面仅保留矩形区域。后台进行裁剪处理后，仅保留拉伸后的矩形物体。
步骤S412：保存照片。将矩形物体呈现出来并保存，从而达到用户需要的对平面矩形物体类似翻拍、扫描需要的独特摄影效果，增强用户拍摄书画作品、海报、文档等类型物体的用户体验感。
综上所述，本发明实施例具有以下技术效果：能够通过提供一种移动终端内置算法程序的方法，使得移动终端在拍照时能够纠正因为拍摄角度所造成的被摄矩形平面物体画面倾斜，从而实现一种为用户量身定制的技术叠加合成，使用户在取景时即可对想要拍摄的倾斜物体进行编辑，拍完即可呈现，省去后期编辑的步骤。同时，对物体轮廓的识别中增加了位置、面积判断，避免了次要被摄物体的干扰，极大提高准确性，使用户感觉摄像机Camera更加便捷，更加人性化，为用户提供更加良好的拍照体验。
本领域技术人员应当理解，图2中所示的纠正被摄物体拍摄倾斜的装置中的各处理模块的实现功能可参照纠正被摄物体拍摄倾斜方法的相关描述而理解。本领域技术人员应当理解，图2所示的纠正被摄物体拍摄倾斜的装置中各处理单元的功能可通过运行于处理器上的程序而实现，也可通过具体的逻辑电路而实现。
尽管上文对本发明进行了详细说明，但是本发明不限于此，本技术领域技术人员可以根据本发明的原理进行各种修改。因此，凡按照本发明原理所作的修改，都应当理解为落入本发明的保护范围。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、 或计算机程序产品。因此，本发明可采用硬件实施例、软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所述，仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。

Claims (12)

  1. 一种纠正被摄物体拍摄倾斜的方法，包括：
    当移动终端检测到被摄物体进入取景界面后，对被摄物体轮廓的边界进行识别，得到被摄物体轮廓；
    对所述被摄物体轮廓进行解析，判断所述被摄物体是否倾斜；
    若判断为倾斜，则对所述被摄物体进行拉直拍摄处理，得到被摄物体的拉直图片。
  2. 根据权利要求1所述的方法，其中，所述的对被摄物体轮廓的边界进行识别，得到被摄物体轮廓，包括：
    对比被摄物体与背景之间的色彩和明度，依据被摄物体与背景之间的色彩和明度的差别，识别对被摄物体轮廓的边界，得到被摄物体轮廓。
  3. 根据权利要求2所述的方法，其中，所述的对所述被摄物体轮廓进行解析，判断所述被摄物体是否倾斜，包括：
    通过判断被摄物体轮廓是否有且只有两条平行边而确定所述被摄物体是否被拍摄为梯形；
    若确定所述被摄物体被拍摄为梯形，则进一步判断是否需要进行拉直拍摄处理。
  4. 根据权利要求3所述的方法，其中，所述的若确定所述被摄物体被拍摄为梯形，则进一步判断是否需要进行拉直拍摄处理，包括：
    判断所述被摄物体是否处于取景界面的中心位置，并且所述被摄物体面积是否超过取景界面的预置百分比；
    若所述被摄物体处于取景界面的中心位置，并且所述被摄物体面积超过取景界面的预置百分比，则确定所述梯形被摄物体需要进行拉直拍摄处理。
  5. 根据权利要求1或4所述的方法，其中，所述的若判断为倾斜，则 对所述被摄物体进行拉直拍摄处理，得到被摄物体的拉直图片，包括：
    对确定为需要进行拉直拍摄处理的被摄物体进行第一操作后，根据接收的拍摄指令，得到被摄物体的倾斜图片；
    对所述被摄物体的倾斜图片进行第二操作，得到被摄物体的拉直图片。
  6. 根据权利要求5所述的方法，其中，所述的对确定为需要进行拉直拍摄处理的被摄物体进行第一操作，包括：
    设置分别通过所述被摄物体轮廓的长平行边的两个角点的、且与所述长平行边垂直的辅助线；
    设置由所述被摄物体轮廓的短平行边的两个角点分别指向所述辅助线的、用于指示所述短平行边的两个角点移动方向的箭头。
  7. 根据权利要求6所述的方法，其中，所述的对所述被摄物体的倾斜图片进行第二操作，得到被摄物体的拉直图片，包括：
    根据所述被摄物体轮廓，分离所述被摄物体和背景得到倾斜的被摄物体画面；
    根据所述用于指示所述短平行边的两个角点移动方向的箭头，对所述倾斜的被摄物体画面进行拉直，得到被摄物体的拉直图片。
  8. 一种纠正被摄物体拍摄倾斜的装置，所述装置包括：
    识别模块，配置为当移动终端检测到被摄物体进入取景界面后，对被摄物体轮廓的边界进行识别，得到被摄物体轮廓；
    解析模块，配置为对所述被摄物体轮廓进行解析，判断所述被摄物体是否倾斜；
    拉直模块，配置为若判断为倾斜，则对所述被摄物体进行拉直拍摄处理，得到被摄物体的拉直图片。
  9. 根据权利要求8所述的装置，其中，所述解析模块进一步包括：
    第一判断子模块，配置为通过判断被摄物体轮廓是否有且只有两条平 行边而确定所述被摄物体是否被拍摄为梯形；
    第二判断子模块，配置为若确定所述被摄物体被拍摄为梯形，则进一步判断是否需要进行拉直拍摄处理。
  10. 根据权利要求8所述的装置，其中，所述拉直模块进一步包括：
    第一操作子模块，配置为对确定为需要进行拉直拍摄处理的被摄物体进行第一操作后，根据接收的拍摄指令，得到被摄物体的倾斜图片；
    第二操作子模块，配置为对所述被摄物体的倾斜图片进行第二操作，得到被摄物体的拉直图片。
  11. 一种移动终端，包括照相机以及处理器，
    所述处理器，配置为当所述处理器检测到被摄物体进入所述照相机的取景界面后，对被摄物体轮廓的边界进行识别，得到被摄物体轮廓；对所述被摄物体轮廓进行解析，判断所述被摄物体是否倾斜；若判断为倾斜，则对所述被摄物体进行拉直拍摄处理，得到被摄物体的拉直图片。
  12. 一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，所述计算机可执行指令用于执行权利要求1至7任一项所述的方法。
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