WO2014005553A1 - 一种数字电影放映方法、优化装置和放映系统 - Google Patents

一种数字电影放映方法、优化装置和放映系统 Download PDF

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Publication number
WO2014005553A1
WO2014005553A1 PCT/CN2013/078936 CN2013078936W WO2014005553A1 WO 2014005553 A1 WO2014005553 A1 WO 2014005553A1 CN 2013078936 W CN2013078936 W CN 2013078936W WO 2014005553 A1 WO2014005553 A1 WO 2014005553A1
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Prior art keywords
image
digital movie
digital cinema
digital
projector
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PCT/CN2013/078936
Other languages
English (en)
French (fr)
Inventor
林民杰
赵中伟
何玮
李海洲
Original Assignee
中影数字巨幕(北京)有限公司
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Application filed by 中影数字巨幕(北京)有限公司 filed Critical 中影数字巨幕(北京)有限公司
Priority to KR1020147036509A priority Critical patent/KR101765763B1/ko
Priority to BR112014032983A priority patent/BR112014032983A2/pt
Priority to EP13813728.6A priority patent/EP2838265A4/en
Priority to IN9262DEN2014 priority patent/IN2014DN09262A/en
Priority to US14/398,716 priority patent/US9769466B2/en
Priority to RU2014145269A priority patent/RU2608782C2/ru
Publication of WO2014005553A1 publication Critical patent/WO2014005553A1/zh

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Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/14Details
    • G03B21/32Details specially adapted for motion-picture projection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/12Picture reproducers
    • H04N9/31Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179Video signal processing therefor
    • H04N9/3182Colour adjustment, e.g. white balance, shading or gamut
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/001Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G09G3/002Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/10Processing, recording or transmission of stereoscopic or multi-view image signals
    • H04N13/106Processing image signals
    • H04N13/128Adjusting depth or disparity
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30Image reproducers
    • H04N13/327Calibration thereof
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30Image reproducers
    • H04N13/363Image reproducers using image projection screens
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30Image reproducers
    • H04N13/398Synchronisation thereof; Control thereof
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/14Picture signal circuitry for video frequency region
    • H04N5/21Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/12Picture reproducers
    • H04N9/31Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141Constructional details thereof
    • H04N9/3147Multi-projection systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/12Picture reproducers
    • H04N9/31Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179Video signal processing therefor
    • H04N9/3185Geometric adjustment, e.g. keystone or convergence
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/12Picture reproducers
    • H04N9/31Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3191Testing thereof
    • H04N9/3194Testing thereof including sensor feedback
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0693Calibration of display systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N2013/0074Stereoscopic image analysis

Definitions

  • the present invention relates to the field of image processing technologies, and in particular, to a digital cinema projection method, an optimization device, and a projection system. Background technique
  • the digital cinema projection system in a movie theater generally includes a digital cinema server and two or more digital cinema projectors.
  • the digital cinema server and the digital cinema projector are connected by signal transmission wires, as shown in FIG.
  • the digital cinema server is used to store, play and manage movies.
  • the player receives the content of the server through the signal line and displays it in the form of light and displays it on the screen.
  • two projectors can be used to display the left and right eye images separately by polarization to achieve a stereoscopic projection effect.
  • Stereoscopic digital cinema projection systems typically use high-gain metal screens to maintain light polarization and increase brightness.
  • brightness will occur due to the directionality of the non-diffuse reflective material. And uneven color.
  • the prior art projection system due to the relative position and angle of the projection optical axis and the screen, the curvature of the screen and its non-diffuse reflection characteristics, and the performance difference between different projectors, etc., have led to
  • the image quality of the projection system displayed in the prior art is not High, therefore, the prior art projection system has a problem that image quality of the projection cannot be guaranteed.
  • the present invention proposes a digital cinema projection method, optimization apparatus, and projection system that solves the problem of image quality that cannot be guaranteed in the prior art.
  • a digital cinema projection method comprising the steps of:
  • the digital film projector projects an image onto the screen, and the image acquisition unit acquires an image on the screen;
  • the image analyzing unit performs digital analysis on the acquired image to obtain a plurality of index parameters of the acquired image.
  • the signal of the image input by the digital cinema server is corrected, and then output to the digital cinema projector;
  • the digital cinema projector will show the corrected image.
  • step A and step B the image is a test image projected before the film is shown; in step C and step D, the image is a film image displayed during the film screening;
  • step A and step B the image is the currently projected image during the film screening
  • steps C and D the image is an image to be projected during the film screening.
  • step A and step B when the image is a test image projected before the film screening, the step of the digital cinema projector to project the image onto the screen comprises: screening the test image, the test image including at least a monochrome test image.
  • the step B includes the steps of: analyzing the monochrome test image in the current screening environment, and obtaining two index parameters of brightness and color hooking; analyzing the test image by using the partial pattern added on the monochrome test image, Focusing, aperture shooting parameters of the image acquisition unit; analyzing the geometry of the monochrome test image, image sharpness and contrast, and comparing with the original image output by the server to obtain geometric shape, image sharpness and contrast parameters.
  • the step C includes the steps of: brightnessing the image signal input by the digital cinema server according to one or more of the shooting parameters, brightness, color uniformity, geometry, image sharpness and contrast index parameters; Compensation for one or more of color sag, geometry, image sharpness, and contrast is output to the digital cinema projector.
  • the present invention also provides a digital cinema optimization apparatus, including an image acquisition unit, an image analysis unit, and an image processing unit; the image acquisition unit, configured to acquire an image on a screen; and the image analysis unit, configured to acquire the image Performing digitized analysis to obtain a plurality of index parameters of the acquired image; the image processing unit is electrically connected between the digital cinema server and the digital cinema projector, and configured to be used by the digital movie server according to the indicator parameters The input image signal is corrected and output to the digital cinema projector.
  • the image transmission unit is further connected between the image acquisition unit and the image analysis unit, and is configured to convert the image acquired by the image acquisition unit into the image analysis.
  • the unit compatible data format is then transmitted to the image analysis unit.
  • the image analyzing unit is configured to: analyze a monochrome test image in a current screening environment, and obtain two index parameters of brightness and color hooking; analyze the test image by using a partial pattern added on the monochrome test image, Obtain the focus and aperture shooting parameters of the image acquisition unit; analyze the geometry, image sharpness and contrast of the monochrome test image, and compare it with the original image output by the server to obtain geometric shape, image sharpness and contrast parameters.
  • the present invention also provides a digital cinema projection system comprising the digital cinema optimization device, a digital cinema server and a digital cinema projector; the digital cinema optimization device being electrically coupled between the digital cinema server and the digital cinema projector.
  • image analysis unit of the digital cinema optimization device and the image processing unit are integrated in one device; and/or the image processing unit of the digital cinema optimization device is integrated in the digital cinema projector or integrated in the Digital movie server.
  • a digital cinema projection method, optimization device and projection system of the present invention acquires and analyzes an image being projected on a screen, and corrects an image to be projected according to the result of the analysis, and then releases the image by the digital cinema projector In this way, the quality of the corrected image is improved, so that the quality of the projected image is improved to a certain extent, and the quality of the projected image is ensured.
  • DRAWINGS The drawings used in the embodiments or the description of the prior art are described in a single manner. It is obvious that the drawings in the following description are some embodiments of the present invention, and those of ordinary skill in the art do not pay Other drawings can also be obtained from these drawings on the premise of creative labor.
  • FIG. 1 is a schematic structural view of a digital cinema projection system of the prior art
  • FIG. 2 is a flow chart of a digital cinema projection method of the present invention
  • FIG. 3 is a schematic diagram of a brightness distribution curve and a compensation curve of the present invention.
  • FIG. 4 is a schematic structural view of an embodiment of a digital cinema optimizing apparatus according to the present invention
  • FIG. 5 is a schematic diagram of a placement position of an image capturing unit of the digital cinema optimizing apparatus of the present invention
  • FIG. 6 is another embodiment of the digital cinema optimizing apparatus of the present invention.
  • FIG. 7 is a schematic structural view of a digital cinema projection system of the present invention.
  • FIG. 8 is a schematic structural view of an embodiment of a digital cinema projection system of the present invention
  • FIG. 9 is a schematic structural view of another embodiment of a digital cinema projection system of the present invention
  • the present invention also provides a digital cinema projection method, as shown in Fig. 2, comprising the steps of: Step S1 1 0, the digital cinema projector projects an image onto the screen, and the image acquisition unit acquires an image on the screen.
  • the digital film projection method of the present invention can acquire and analyze the test image to obtain image processing parameters by projecting a specific test image before the digital film projector displays the movie, so that the image actually needed to be projected can be tested according to the pair.
  • the analysis result of the image is subjected to a subsequent unified correction process.
  • the embodiment of the present invention can also capture the image image being displayed in the middle of the screening process to obtain image processing parameters, and then dynamically update the image of the subsequent real-time projection. Correction processing, such as by acquiring an image of the previous frame, and analyzing to correct the image of the next frame, and the like.
  • Correction processing such as by acquiring an image of the previous frame, and analyzing to correct the image of the next frame, and the like.
  • These two methods may be used in one or a combination of the two methods.
  • the digital cinema projector projects a test image onto the screen before the film screening, and the image acquisition unit acquires the test image on the screen.
  • the test images include, but are not limited to, monochrome test images such as red, green, blue, black, white, and gray. Through the analysis of these monochrome test images. Features such as image brightness and color uniformity for screens of different colors and brightness in a specific projection environment, projection system, and screen characteristics.
  • test image for extracting the brightness and the color uniformity is a monochrome test image
  • test image for extracting other parameter indicators may be a test image such as a checkerboard or a mole, and those skilled in the art can according to the technical idea of the present invention, according to actual conditions.
  • the invention is not limited.
  • Adding local patterns such as lines and color patches to the monochrome image for testing makes it easier for the image acquisition unit to take acquisition parameters including, but not limited to, focus, aperture, and the like.
  • Step S 111 The image analyzing unit performs digital analysis on the acquired image to obtain a plurality of index parameters of the obtained image.
  • the analysis process specifically includes: analyzing a monochrome test image of different colors in a specific screening environment, obtaining two index parameters of brightness and color hooking, and analyzing the test image by using a partial pattern added on the monochrome test image,
  • the imaging parameters such as focus and aperture of the image acquisition unit are obtained, and the geometry, image sharpness and contrast of the monochrome test image are analyzed, and compared with the original image output by the server.
  • Uniformity refers to screen display devices, such as screens, projectors, etc.
  • the properties and characteristics of the screen may be inconsistent in different areas of the display device.
  • the color of the monochrome screen displayed on the screen the brightness and other image properties are inconsistent in different areas of the screen, mostly for the small brightness and color area.
  • the digital cinema projection method of the present invention performs brightness and uniformity analysis on the acquired image.
  • the brightness and the uniformity of the hook are obtained, and the brightness and the uniformity are compensated by the video processing to improve the brightness and the uniformity of the screen.
  • Figure 3 is a schematic diagram of the brightness distribution curve and the compensation curve.
  • Brightness and uniformity compensation can ensure the projection brightness of two or more projectors to display planes or stereoscopic movies, increase the uniformity of image indicators such as color and brightness of the projection screen, and reduce the plane or stereoscopic display of multiple projectors at the same time.
  • the inconsistencies in the nature of the screen such as color and brightness between the multiple projection screens appear.
  • Geometric deformation refers to a screen display device, such as a screen
  • the properties and characteristics of the projector may cause the geometry of the screen to differ from the source image.
  • the system of the invention compares and analyzes the acquired picture with the source picture, and performs geometric correction or processing of the picture through video processing.
  • a mesh can be added to the monochrome test image to make the image deformation more obvious and easier to capture.
  • the geometric distortion of the projected picture can be reduced, and there is no relative geometric distortion between the multiple projected pictures when multiple projectors are simultaneously projected on the flat or stereoscopic picture.
  • the image image acquired by the image capturing device such as a camera or a camera is compared with the source image and subjected to sharpness analysis, and the image sharpness correction is performed by video processing.
  • the image image acquired by an image acquisition device such as a camera or a camera is compared with the source image and contrast analysis is performed, and the image contrast correction is performed by video processing.
  • Step S 1 1 2 the image signal input by the digital cinema server 1 is corrected according to the indicator parameters, and then output to the digital cinema projector.
  • the image signal input by the digital cinema server is compensated for brightness, color uniformity, geometry, image sharpness, and contrast according to the shooting parameters, brightness, color uniformity, geometry, image sharpness, and contrast index parameters.
  • Output to a digital cinema projector is compensated for brightness, color uniformity, geometry, image sharpness, and contrast according to the shooting parameters, brightness, color uniformity, geometry, image sharpness, and contrast index parameters.
  • Step S 1 1 3 the digital cinema projector will show the corrected image.
  • the present invention improves the picture quality or the viewing effect of an ordinary 2D movie or a stereoscopic 3D movie by analyzing and processing the projected image to change the picture properties such as the geometric shape, color, brightness, and contrast of the projected image.
  • the embodiment of the invention provides a digital cinema optimization device, which is electrically connected between the digital cinema server 1 and the digital cinema projector 2.
  • FIG. 4 it includes an image acquisition unit 31, an image analysis unit 32, and an image processing unit 33.
  • the image acquisition unit 31 is configured to acquire an image on the screen, and has a function of digitally acquiring a movie or a test screen displayed by the projection system.
  • the image acquisition unit 31 is one or more cameras or cameras.
  • the image signal acquired by the camera or the camera is output to the image analyzing unit 32 through a network cable or a USB interface.
  • the image acquisition unit 31 can be installed at a position close to the optical path of the projector.
  • the projection screen As shown in FIG. 5, it can be installed in the projection room 7 or the auditorium 5, or near and behind the screen 4 or built in the partition wall 6, such as between the projection room 7 and the auditorium 5.
  • the opening Inside the wall 6, and open on the 5th side of the auditorium, to obtain the screen on the screen 4, the opening can be closed with ordinary or optical glass to achieve dust and protection.
  • the image analyzing unit 32 is configured to perform digital analysis on the acquired image to obtain a plurality of index parameters of the acquired image.
  • the plurality of indicator parameters include one or more of shooting parameters, brightness, color uniformity, geometry, image sharpness, and contrast indicator parameters.
  • the image processing unit 33 is electrically connected between the digital cinema server 1 and the digital cinema projector 2, and is configured to perform correction processing on the image signal input by the digital cinema server 1 according to the indicator parameters, and output the image to the digital Movie projector 2.
  • the digital cinema optimizing device 3 further includes an image transmission unit 34.
  • the image transmission unit 34 is electrically connected between the image acquisition unit 31 and the image analysis unit 32, and is configured to convert the image acquired by the image acquisition unit 31 into compatibility with the image analysis unit 32. The data format is then transmitted to the image analysis unit 32.
  • the image transmission unit 34 is integrated in the image analyzing unit 32.
  • the data conversion process can be performed by a chip integrated on the image analysis unit 32, or by a USB wire having a data conversion function.
  • the image acquisition unit 31 acquires the image
  • it is transmitted by the image transmission unit 34 to the image analysis unit 32.
  • the image analysis unit 32 digitally analyzes the acquired image image, and the obtained analysis result is used as an image processing parameter and basis.
  • the one or more sets of original image images output by the digital cinema server 1 are processed in real time by the image processing unit 33, so that the images projected by the entire projection system are corrected in terms of geometry, color, uniformity, contrast, etc., and further Improve image quality.
  • the embodiment of the present invention further provides a digital cinema projection system, as shown in FIG. 7, including the digital cinema optimization device 3, the digital cinema server 1, and the digital cinema projector 2.
  • the digital cinema optimizing device 3 is electrically connected between the digital cinema server 1 and the digital cinema projector 2.
  • the image analyzing unit 32 of the digital cinema optimizing apparatus 3 and the image processing unit 33 are integrated in one device.
  • it can be integrated on the same computer or server.
  • the image processing unit 33 can implement real-time processing functions by using an electronic circuit based on a microprocessor or an FPGA (F i e l d - Programmab l e Ga t e Ar ray).
  • the image processing unit 33 of the digital cinema optimization device 3 can be integrated into the digital cinema projector 2, that is, a set of image acquisition and image analysis unit 32, and a plurality of sets of image processing units 33 are employed.
  • the system mode, each image processing unit 33 is integrated into each digital cinema projector 2, as shown in FIG.
  • the image processing unit 33 can also be built in the digital cinema server 1, and the movie content output from the digital cinema server 1 can be processed in real time to achieve the effects of correction and image quality improvement.
  • an image capturing or photographing apparatus an image analyzing unit 32, and an image processing unit 33 are added between a server and a projector of a general digital cinema projection system, and the image analyzing unit 32 performs the acquired image of the played image.
  • the digitized analysis obtains the quantized features, and the image processing unit 33 performs correction processing based on the quantized features to improve the quality of the projected picture! 3 ⁇ 4.
  • a digital cinema projection method, optimization device and projection system of the present invention by adding a digital video signal processing device to a video signal output end of a signal source in a general projection system and a video signal input end of the projector, real-time playing the played image Or non-real-time acquisition, the obtained video or image is analyzed, and the image processing unit is used to correct the video signal according to the analysis result, thereby increasing the picture effect and quality of the overall projection system.
  • the foregoing storage medium includes: various media that can store program codes, such as ROM, RAM, disk or optical disk.

Abstract

本发明提出了一种数字电影放映方法,包括步骤:数字电影放映机放映图像至屏幕上,图像获取单元获取屏幕上的图像;图像分析单元对获取的图像进行数字化分析,得到获取的图像的多项指标参数;根据所述各项指标参数,将由数字电影服务器输入的图像信号进行校正处理后,输出给数字电影放映机;数字电影放映机将经过校正的图像放映。本发明还提供一种数字电影优化装置,包括图像获取单元、图像分析单元和图像处理单元。本发明还提供一种数字电影放映系统,包括述数字电影优化装置、数字电影服务器和数字电影放映机;数字电影优化装置电性连接于数字电影服务器和数字电影放映机之间。本发明的方法、装置和系统,有效提升了放映图像的质量。

Description

一种数字电影放映方法、 优化装置和放映系统 技术领域
本发明涉及图像处理技术领域, 尤其是涉及一种数字电影放映方法、 优化装置和放映系统。 背景技术
电影院中的数字电影放映系统一般包括一台数字电影服务器和两台 以上数字电影放映机, 数字电影服务器和数字电影放映机之间用信号传输 导线连接, 如图 1所示。 数字电影服务器用来储存, 播放及管理影片, 放 映机通过信号线将服务器的播放内容接收后以光的形式放映出来并显示 在屏幕上。 在放映立体电影时, 可采用两台放映机分别放映左右眼图像通 过偏振等方法达到立体放映效果。
由于不同影院观众厅的建筑特点, 几何形状, 屏幕形状, 放映机特性 等条件不一致, 当放映光轴与屏幕的相对位置和角度不当, 或者由于屏幕 的弧度等原因容易造成画面变形, 如果两台放映机若放映同样画面时, 则 会造成一定程度的重影, 当放映立体节目时, 则会出现成左右眼图像相对 变形, 造成观影疲劳。
立体数字电影放映系统通常采用高增益的金属幕以保持光的偏振性 和增加亮度, 当放映画面打在高增益的金属幕上时, 由于非漫反射材料的 反射具有一定方向性, 会出现亮度及色彩的不均匀。
除此之外, 由于两台或多台放映系统存在性能差异, 引起两套或多套 画面之间存在色彩, 亮度等光学指标的不一致, 在放映立体画面时, 这种 不一致会造成放映质量下降, 同样造成观影疲劳。 而且, 普通放映系 统放映出的画面与片源的对比度、 锐度等指标完全相同, 没有进一步提高 画面质量的机制。
综上所述, 现有技术中的放映系统, 由于放映光轴与屏幕的相对位置 和角度不当、 屏幕的弧度以及本身的非漫反射特性、 以及不同放映机之间 的性能差异等原因, 导致了现有技术中的放映系统放映的图像画面质量不 高, 因此, 现有技术的放映系统存在无法保证放映的图像质量的问题。 发明内容
本发明提出了一种数字电影放映方法、 优化装置和放映系统, 解决了 现有技术中的无法保证放映的图像质量的问题。
为了达到上述目的, 本发明的技术方案是这样实现的:
一种数字电影放映方法, 包括步骤:
A , 数字电影放映机放映图像至屏幕上, 图像获取单元获取屏幕上的 图像;
B , 图像分析单元对获取的图像进行数字化分析, 得到所述获取的图 像的多项指标参数;
C , 根据所述各项指标参数, 将由数字电影服务器输入的图像的信号 进行校正处理后, 输出给数字电影放映机;
D, 数字电影放映机将经过校正的图像放映。
其中:步骤 A和步骤 B中,所述图像为在影片放映前放映的测试图像; 步骤 C和步骤 D中, 所述图像为影片放映过程中放映的影片图像;
或者; 步骤 A和步骤 B中, 所述图像为影片放映过程中的当前放映的 图像; 步骤 C和步骤 D中, 所述图像为影片放映过程中将要放映的图像。
其中, 当步骤 A和步骤 B中, 所述图像为在影片放映前放映的测试图 像时, 所述步骤数字电影放映机放映图像至屏幕上包括: 放映测试图像, 所述测试图像至少包括单色测试图像。
其中,所述步骤 B包括步骤:分析在当前放映环境下的单色测试图像, 得到亮度、 色彩均勾度这两个指标参数; 利用单色测试图像上增加的局部 图案, 分析测试图像, 得到图像获取单元的聚焦、 光圏的拍摄参数; 分析 单色测试图像的几何形状、 图像锐度和对比度, 并与服务器输出的原画面 进行比较, 得到几何形状、 图像锐度和对比度参数。
其中,所述步骤 C包括步骤:根据所述拍摄参数、亮度、 色彩均匀度、 几何形状、 图像锐度和对比度指标参数中的一种或多种, 将由数字电影服 务器输入的图像信号进行亮度、 色彩均勾度、 几何形状、 图像锐度和对比 度中的一种或多种的补偿, 输出给数字电影放映机。 本发明还提供一种数字电影优化装置, 包括图像获取单元、 图像分析 单元和图像处理单元; 所述图像获取单元, 用于获取屏幕上的图像; 所述 图像分析单元, 用于对获取的图像进行数字化分析, 得到所述获取的图像 的多项指标参数; 所述图像处理单元, 电性连接于数字电影服务器和数字 电影放映机之间, 用于根据所述各项指标参数, 将由数字电影服务器输入 的图像信号进行校正处理后, 输出给数字电影放映机。
其中, 还包括图像传输单元; 所述图像传输单元, 电性连接于所述图 像获取单元和所述图像分析单元之间, 用于将所述图像获取单元获取的图 像转换为与所述图像分析单元兼容的数据格式后传输至所述图像分析单 元。
其中, 所述图像分析单元用于: 分析在当前放映环境下的单色测试图 像, 得到亮度、 色彩均勾度这两个指标参数; 利用单色测试图像上增加的 局部图案, 分析测试图像, 得到图像获取单元的聚焦、 光圏的拍摄参数; 分析单色测试图像的几何形状、 图像锐度和对比度, 并与服务器输出的原 画面进行比较, 得到几何形状、 图像锐度和对比度参数。
本发明还提供一种数字电影放映系统, 包括所述数字电影优化装置、 数字电影服务器和数字电影放映机; 所述数字电影优化装置电性连接于所 述数字电影服务器和数字电影放映机之间。
其中, 所述数字电影优化装置的图像分析单元和所述图像处理单元集 成于一台设备; 和 /或, 所述数字电影优化装置的图像处理单元集成于所 述数字电影放映机或集成于所述数字电影服务器。
可见, 本发明至少具有如下的有益效果:
本发明的一种数字电影放映方法、 优化装置和放映系统, 获取屏幕上 的正在放映的图像, 并对其进行分析, 并根据分析的结果对将要放映的图 像进行校正后再由数字电影放映机放出, 这样, 经过校正后的图像的质量 有所提升, 使得放映的图像质量得到了一定程度的改善, 保证了放映图像 的质量。 附图说明 实施例或现有技术描述中所需要使用的附图作一筒单地介绍, 显而易见地, 下面描述中的附图是本发明的一些实施例, 对于本领域普通技术人员来讲 , 在不付出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。
图 1为现有技术的数字电影放映系统的结构示意图;
图 2为本发明的数字电影放映方法的流程图;
图 3为本发明的亮度分布曲线及补偿曲线示意图;
图 4为本发明的数字电影优化装置的一个实施例的结构示意图; 图 5为本发明的数字电影优化装置的图像获取单元的放置位置示意图; 图 6为本发明的数字电影优化装置的另一个实施例的结构示意图; 图 7为本发明的数字电影放映系统的结构示意图;
图 8为本发明的数字电影放映系统的一个实施例的结构示意图; 图 9为本发明的数字电影放映系统的另一个实施例的结构示意图; 图 1 0为本发明的数字电影放映系统的再一个实施例的结构示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本 发明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整地描 述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有做出创造性劳动前提 下所获得的所有其他实施例, 都属于本发明保护的范围。
本发明还提供了一种数字电影放映方法, 参见图 2所示, 包括步骤: 步骤 S 1 1 0 ,数字电影放映机放映图像至屏幕上, 图像获取单元获取屏 幕上的图像。
本发明的数字电影放映方法, 可在数字电影放映机放映影片之前, 通 过放映特定的测试图象,对测试图像进行获取、分析以得到图像处理参数, 这样, 实际需要放映的图像可以都根据对测试图像的分析结果进行后续的 统一的校正处理; 另外, 本发明实施例也可在放映过程中间断地或实时地 采集正在放映的图像画面以得到图像处理参数, 然后对后续实时放映的图 像进行动态的校正处理, 比如通过获取前一帧的图像, 并分析以便对后一 帧的图像进行校正等。此两种方法可采用其中一种,或两种方法结合使用。 优选地, 在本实施例中, 数字电影放映机在影片放映前放映测试图像 至屏幕上, 图像获取单元获取屏幕上的所述测试图像。
所述测试图像, 包括但不限于红、 绿、 蓝、 黑、 白、 灰等单色测试图 像。 通过对这些单色测试图像的分析。 可得到不同色彩和亮度的画面在特 定放映环境、 放映系统和屏幕特性下的图像亮度、 色彩均匀度的特征。
用于提取亮度、 色彩均匀度的测试图像为单色测试图像, 用于提取其 他参数指标的测试图像可以为棋格、 摩尔等测试图像, 本领域技术人员能 够根据本发明的技术构思, 根据实际情况选择适宜的测试图像进行测试, 本发明不做限定。
在测试用的单色图像上增加线条、 色块等局部图案, 会更易于图像获 取单元取得包括但不限于聚焦、 光圏等的拍摄参数。
步骤 S 111 , 图像分析单元对获取的图像进行数字化分析,得到所述获 取的图像的多项指标参数。
所述分析过程具体包括: 分析在特定放映环境下的不同颜色的单色测 试图像, 得到亮度、 色彩均勾度这两个指标参数, 利用单色测试图像上增 加的局部图案, 分析测试图像, 得到图像获取单元的聚焦、 光圏等拍摄参 数, 同时分析单色测试图像的几何形状、 图像锐度和对比度, 并与服务器 输出的原画面进行比较。
均匀度系指画面显示设备, 比如屏幕、 放映机等的属性和特点可能造 成的画面在显示设备不同区域不一致。 比如单色画面在屏幕上显示出的颜 色, 亮度等图像性质在屏幕不同区域不一致, 多为微小亮度和颜色区另 t 本发明的数字电影放映方法对获取的图像画面进行亮度和均勾度分析, 得 到亮度和均勾度差别趋势, 并对亮度和均勾度差别通过视频处理进行亮度 和均勾度补偿以提升画面亮度和均勾度。以进行亮度补偿为例,参见图 3 , 图 3为亮度分布曲线及补偿曲线示意图。
进行亮度和均勾度补偿, 可以保证两套或以上放映机放映平面或立体 电影的放映亮度,增加放映画面色彩、亮度等图像指标在屏幕上的均匀度, 减少在多台放映机同时放映平面或立体画面时, 多个放映画面间的色彩、 亮度等画面性质的不一致情况的出现。
同时,还进行几何变形分析。几何变形系指画面显示设备,比如屏幕、 放映机等的属性和特点可能造成的画面的几何形状与源画面有区别。 本发 明系统对采集到的画面与源画面比较并进行变形分析, 并通过视频处理进 行画面几何校正或处理。 在对图像进行几何变形分析时, 可在所述单色测 试图像上添加网格, 以使图像变形更为明显, 更易捕捉。
如此, 可以减少放映画面的几何变形, 保证在多台放映机同时放映平 面或立体画面时, 多个放映画面间无相对几何变形。
进行图像锐度分析时, 对用摄像机或照相机等图像获取设备获取的图 像画面与源画面比较并进行锐度分析, 并通过视频处理进行画面锐度校正。
进行图像对比度分析时, 对用摄像机或照相机等图像获取设备获取的 图像画面与源画面比较并进行对比度分析, 并通过视频处理进行画面对比 度校正。
步骤 S 1 1 2 ,根据所述各项指标参数,将由数字电影服务器 1输入的图 像信号进行校正处理后, 输出给数字电影放映机。
根据所述拍摄参数、 亮度、 色彩均勾度、 几何形状、 图像锐度和对比 度指标参数,将由数字电影服务器输入的图像信号进行亮度、色彩均匀度、 几何形状、 图像锐度和对比度的补偿, 输出给数字电影放映机。
步骤 S 1 1 3 , 数字电影放映机将经过校正的图像放映。
本发明通过对放映图像的分析和处理, 作到对放映图像的几何形状、 色彩、 亮度、 对比度等画面性质的改变, 以提升普通 2D电影或立体 3D电 影的画面质量或观影效果。
本发明实施例提供了一种数字电影优化装置, 所述数字电影优化装置 电性连接于数字电影服务器 1与数字电影放映机 2之间。
参见图 4 , 所示, 其包括图像获取单元 31、 图像分析单元 32和图像 处理单元 3 3。
所述图像获取单元 31 ,用于获取屏幕上的图像, 具有将放映系统放映 出的影片或测试画面以数字方法获取的功能。
在本实施例中, 所述图像获取单元 31 为一台或多台摄像机或者照相 机。 所述摄像机或者照相机获取的图像信号, 通过网线或 USB接口将获取 的图像信号输出到图像分析单元 32中。
优选地, 可将所述图像获取单元 31 安装于靠近放映机光路的位置, 以达到有效地获取放映画面的目的, 参见图 5所示, 可安装于放映间 7或 观众厅 5, 或屏幕 4附近及背面或内置于隔断墙 6 , 比如放映间 7和观众 厅 5之间的墙体 6 内,并于靠观众厅 5—面开口, 用以获取屏幕 4上的放 映画面, 开口可用普通或光学玻璃封闭已达到防尘和保护功能。
所述图像分析单元 32 ,用于对获取的图像进行数字化分析,得到所述 获取的图像的多项指标参数。
所述多项指标参数, 包括拍摄参数、 亮度、 色彩均匀度、 几何形状、 图像锐度和对比度指标参数中的一种或多种。
所述图像处理单元 33 ,电性连接于数字电影服务器 1和数字电影放映 机 2之间, 用于根据所述各项指标参数, 将由数字电影服务器 1输入的图 像信号进行校正处理后, 输出给数字电影放映机 2。
优选地, 所述数字电影优化装置 3还包括图像传输单元 34。
所述图像传输单元 34 , 电性连接于所述图像获取单元 31和所述图像 分析单元 32之间, 用于将所述图像获取单元 31获取的图像转换为与所述 图像分析单元 32兼容的数据格式后传输至所述图像分析单元 32。
参见图 6所示, 在本实施例中, 所述图像传输单元 34集成于所述图 像分析单元 32。
由于摄像机或者照相机的数据输出接口与所述图像分析单元 32 的数 据输入接口不兼容, 在将摄像机或者照相机摄取的图像传输至所述图像分 析单元 32 时, 需要对其数据格式进行转换, 这一数据转换过程可由一块 集成于所述图像分析单元 32 上的芯片来完成, 也可由本身具有数据转换 功能的 USB导线来完成。
所述图像获取单元 31获取图像后, 由图像传输单元 34传输至所述图 像分析单元 32 ,所述图像分析单元 32对获取的图像画面进行数字化分析, 得出的分析结果作为图像处理参数和依据, 通过图像处理单元 33对数字 电影服务器 1输出的一套或多套原有图像画面进行实时处理, 使得整套放 映系统放映出的画面在几何形状、色彩、均匀度、对比度等方面得到校正, 进而使图像质量有所提升。
本发明实施例还提供了一种数字电影放映系统, 参见图 7所示, 包括 所述数字电影优化装置 3、 数字电影服务器 1和数字电影放映机 2。 所述数字电影优化装置 3电性连接于所述数字电影服务器 1和数字电 影放映机 2之间。
参见图 8所示, 作为一种可实施方式, 所述数字电影优化装置 3的图 像分析单元 32和所述图像处理单元 33集成于一台设备。 例如, 可以集成 于同一台计算机或者服务器。
作为一种可实施方式, 所述图像处理单元 33可采用基于微型处理器 或者 FPGA ( F i e l d - Programmab l e Ga t e Ar ray , 现场可编程门阵列) 的电 子线路来实现其实时处理功能。 优选地, 在本实施方式中, 可将所述数字 电影优化装置 3的图像处理单元 33集成于所述数字电影放映机 2 ,即采用 一套图像获取、 图像分析单元 32 , 多套图像处理单元 33的系统模式, 每 个图像处理单元 33分别集成于每台数字电影放映机 2 , 参见图 9所示。
参见图 1 0所示, 作为一种可实施方式, 也可将图像处理单元 33内置 于数字电影服务器 1中, 对数字电影服务器 1输出的影片内容进行实时处 理达到校正和图像质量提升的效果。
很显然, 本领域技术人员可根据本发明的技术构思, 可对所述数字电 影放映系统的各个功能模块之间的连接方式及设置位置做稍许改动, 得到 除前述几种实施方式以外的实施方式, 都应属于本发明的保护范围。
本发明的数字电影放映系统,在普通数字电影放映系统的服务器和放 映机之间增加摄像或照相设备、 图像分析单元 32和图像处理单元 33 , 图 像分析单元 32 将获取到的播放出的图像画面进行数字化的分析得到量化 特征, 图像处理单元 33根据此量化特征进行校正处理, 使放映画面质量 提! ¾。
本发明的一种数字电影放映方法、 优化装置和放映系统, 通过在普通 放映系统中的信号源的视频信号输出端及放映机视频信号输入端增加数 字视频信号处理设备, 对播放出的画面进行实时或非实时采集, 将得到的 视频或图像进行分析, 利用图像处理单元根据分析结果对视频信号进行校 正, 增加了整体放映系统的画面效果和质量。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或部分步 骤可以通过程序指令相关的硬件来完成, 前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, 执行包括上述方法实施例的步骤; 而前述的存储介质包括: R0M、 RAM, 磁碟或者光盘等各种可以存储程序代 码的介质。
最后应说明的是:以上实施例仅用以说明本发明的技术方案,而非对其限制; 尽管参照前述实施例对本发明进行了详细的说明, 本领域的普通技术人员应 当理解: 其依然可以对前述各实施例所记载的技术方案进行修改, 或者对其 中部分技术特征进行等同替换; 而这些修改或者替换, 并不使相应技术方案 的本质脱离本发明各实施例技术方案的精神和范围。

Claims

权利要求
1、 一种数字电影放映方法, 其特征在于, 包括步骤:
A , 数字电影放映机放映图像至屏幕上, 图像获取单元获取屏幕上的 图像;
B , 图像分析单元对获取的图像进行数字化分析, 得到所述获取的图 像的多项指标参数;
C , 根据所述各项指标参数, 将由数字电影服务器输入的图像的信号 进行校正处理后, 输出给数字电影放映机;
D, 数字电影放映机将经过校正的图像放映。
2、 根据权利要求 1所述的数字电影放映方法, 其特征在于: 步骤 A和步骤 B中, 所述图像为在影片放映前放映的测试图像; 步骤 C和步骤 D中, 所述图像为影片放映过程中放映的影片图像;
或者; 步骤 A和步骤 B中, 所述图像为影片放映过程中的当前放映的 图像; 步骤 C和步骤 D中, 所述图像为影片放映过程中将要放映的图像。
3、 根据权利要求 2所述的数字电影放映方法, 其特征在于, 当步骤 A 和步骤 B中, 所述图像为在影片放映前放映的测试图像时, 所述步骤 A中 数字电影放映机放映图像至屏幕上包括:
放映测试图像, 所述测试图像至少包括单色测试图像。
4、 根据权利要求 3所述的数字电影放映方法, 其特征在于, 所述步 骤 B包括步骤:
分析在当前放映环境下的单色测试图像, 得到亮度、 色彩均匀度这两 个指标参数;
利用单色测试图像上增加的局部图案, 分析所述单色测试图像, 得到 图像获取单元的聚焦、 光圏的拍摄参数;
分析测试图像的几何形状、 图像锐度和对比度, 并与服务器输出的原 画面进行比较, 得到几何形状、 图像锐度和对比度参数。
5、 根据权利要求 4所述的数字电影放映方法, 其特征在于, 所述步 骤 C包括步骤:
根据所述拍摄参数、 亮度、 色彩均勾度、 几何形状、 图像锐度和对比 度指标参数中的一种或多种, 将由数字电影服务器输入的图像信号进行亮 度、 色彩均勾度、 几何形状、 图像锐度和对比度中的一种或多种的补偿, 输出给数字电影放映机。
6、 一种数字电影优化装置, 其特征在于, 包括图像获取单元、 图像 分析单元和图像处理单元;
所述图像获取单元, 用于获取屏幕上的图像;
所述图像分析单元, 用于对获取的图像进行数字化分析, 得到所述获 取的图像的多项指标参数;
所述图像处理单元, 电性连接于数字电影服务器和数字电影放映机之 间, 用于根据所述各项指标参数, 将由数字电影服务器输入的图像信号进 行校正处理后, 输出给数字电影放映机。
7、 根据权利要求 6所述的数字电影优化装置, 其特征在于, 还包括 图像传输单元;
所述图像传输单元, 电性连接于所述图像获取单元和所述图像分析单 元之间, 用于将所述图像获取单元获取的图像转换为与所述图像分析单元 兼容的数据格式后传输至所述图像分析单元。
8、 根据权利要求 7所述的数字电影优化装置, 其特征在于, 所述图 像分析单元用于:
分析在当前放映环境下的单色测试图像, 得到亮度、 色彩均匀度这两 个指标参数; 利用单色测试图像上增加的局部图案, 分析测试图像, 得到 图像获取单元的聚焦、 光圏的拍摄参数; 分析测试图像的几何形状、 图像 锐度和对比度, 并与服务器输出的原画面进行比较, 得到几何形状、 图像 锐度和对比度参数。
9、 一种数字电影放映系统, 其特征在于, 包括如权利要求 7所述的 数字电影优化装置、 数字电影服务器和数字电影放映机;
所述数字电影优化装置电性连接于所述数字电影服务器和数字电影 放映机之间。
10、 根据权利要求 9所述的数字电影放映系统, 其特征在于, 所述数 字电影优化装置的图像分析单元和所述图像处理单元集成于一台设备; 和 /或, 所述数字电影优化装置的图像处理单元集成于所述数字电影 放映机或集成于所述数字电影服务器。
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