WO2017133359A1 - 显示设备的性能参数检测方法和系统 - Google Patents

显示设备的性能参数检测方法和系统 Download PDF

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WO2017133359A1
WO2017133359A1 PCT/CN2016/112880 CN2016112880W WO2017133359A1 WO 2017133359 A1 WO2017133359 A1 WO 2017133359A1 CN 2016112880 W CN2016112880 W CN 2016112880W WO 2017133359 A1 WO2017133359 A1 WO 2017133359A1
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video sequence
sequence
signal strength
display device
aligned
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雷延强
罗忠辉
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Guangzhou Shiyuan Electronics Thecnology Co Ltd
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Guangzhou Shiyuan Electronics Thecnology Co Ltd
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    • 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
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00Diagnosis, testing or measuring for television systems or their details
    • 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
    • G09G3/006Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00Diagnosis, testing or measuring for television systems or their details
    • H04N17/04Diagnosis, testing or measuring for television systems or their details for receivers

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  • the present invention relates to the field of signal detection technologies, and in particular, to a method and system for detecting performance parameters of a display device.
  • a display device is a device that can output images or touch information. If the input signal is an electronic signal, such a display device will be referred to as an electronic display device, as opposed to a mechanical display device. Common display devices include televisions, computers, and the like. In order to ensure the normal operation of the display device, it is usually necessary to detect some performance parameters of the display device. Taking the TV as an example, the sensitivity of the TV motherboard is an important performance parameter of the TV.
  • the existing scheme for detecting the sensitivity of the TV motherboard is: sending a video signal through a dedicated device, outputting it to the TV main board, and then displaying it on the TV screen; the tester manually adjusts the emphasis of the output signal of the dedicated device, and observes whether the screen is on the screen.
  • a mosaic effect appears.
  • the corresponding signal strength is the sensitivity of the TV motherboard.
  • Another solution is to obtain the bit error rate directly through the decoding chip (the representation of the bit error rate is the mosaic effect).
  • the prior art has high cost for detecting performance parameters of the display device.
  • a method for detecting performance parameters of a display device includes the following steps:
  • a performance parameter detecting system for a display device comprising:
  • An acquiring module configured to obtain a first video sequence of the current output from a video sequence whose signal strength outputted by the display device is a preset value
  • An aligning module configured to perform an alignment operation on the first video sequence according to a pre-stored test sequence; wherein content of the first video sequence is part of the test sequence;
  • An adjustment module configured to adjust a signal strength of the aligned first video sequence to a first signal strength; wherein the first signal strength is that the aligned first video sequence is outputted by the display device without a mosaic The critical signal strength between the effect and the appearance of the mosaic effect;
  • a determining module configured to determine a performance parameter of the display device according to the first signal strength.
  • the method and system for detecting a performance parameter of the display device by acquiring a first video sequence currently outputted from a video sequence whose signal strength is a preset value outputted from the display device, performing alignment operation on the first video sequence, and then aligning
  • the signal strength of the first video sequence is adjusted to a critical signal strength between the mosaicless effect and the mosaic effect after output by the display device, and the performance parameter of the display device is determined according to the critical signal strength, and the Automatic detection of performance parameters, no manual adjustment, no additional hardware equipment, low cost and high efficiency.
  • FIG. 1 is a flow chart of a method for detecting performance parameters of a display device of the present invention
  • FIG. 2 is a schematic structural view of a performance parameter detecting system of a display device of the present invention.
  • the performance parameter detecting method of the display device may include the following steps:
  • the video sequence may be a higher quality video sequence, wherein the higher quality may mean that the signal strength is a signal strength corresponding to a mosaicless effect after being decoded and output by the display device.
  • Control device The video signal generating device is adjusted to output a higher quality video signal to the display device, and the display device can decode the video signal to obtain the video sequence.
  • the signal strength exceeds a certain range and the video quality is high.
  • the first video sequence may be part of the test sequence, but the signal strength of the first video sequence may be different from the signal strength of the test sequence.
  • the video signal generating device continuously outputs the video signal, but it does not indicate which frame in the entire test sequence the image at that moment is.
  • the location of the video sequence to prepare for subsequent operations.
  • a distance metric function between the first video sequence and the test sequence may be calculated, and the first video sequence may be aligned according to the distance metric function.
  • the distance metric function is used to characterize the similarity between the first video sequence and the test sequence.
  • the distance metric function may be a function of any metric distance, as long as the metric value is smaller and more similar.
  • the distance metric function can be calculated according to the following formula:
  • X is the first video sequence
  • Y j is a sequence of the test sequence that is the same length as the first video sequence
  • d(X, Y j ) is the first video sequence and the test sequence
  • n is the number of frames of the first video sequence
  • x k is the kth video frame in the first video sequence
  • y j+k is the j+k in the test sequence
  • Video frames k is an integer between 0 and n
  • j is a constant between 0 and mk
  • m is the frame length of the test sequence.
  • the alignment can be done according to the following formula:
  • X is the first video sequence
  • Y j is a sequence of the test sequence that is the same length as the first video sequence
  • d(X, Y j ) is the first video sequence and the test sequence
  • J is the time alignment point of the first video sequence and the test sequence
  • j is a constant between 0 and mk
  • m is the frame length of the test sequence.
  • a frame-by-frame comparison can be taken to determine if there is a mosaic effect at the current time. If the mosaic effect does not appear, continue to adjust the signal strength of the first video sequence to determine again whether the mosaic effect occurs; this cycle until the mosaic effect occurs.
  • the critical signal strength of the aligned first video sequence from a no-mosaic effect to a mosaic effect may be set as the first signal strength.
  • Step 1 dividing the video frame of the aligned first video sequence into a plurality of non-overlapping regions
  • Step 2 calculating a quality evaluation function of each region, and calculating a strength of a mosaic effect of the aligned first video sequence according to a quality evaluation function of each region; wherein the quality evaluation function is used to characterize the aligned Image quality of the first video sequence;
  • the quality evaluation function may be any function for evaluating image quality, such as a commonly used PSNR (Peak Signal to Noise Ratio), SSIM (structural similarity), etc., as long as the metric is satisfied. The larger the value, the more similar it is. In this way, the image quality of the aligned first video sequence can be obtained simply and flexibly.
  • PSNR Peak Signal to Noise Ratio
  • SSIM structural similarity
  • I is the intensity of the mosaic effect of the aligned first video sequence
  • a value of 1 indicates a mosaic effect. 0 means no mosaic effect
  • I is the a-th region of the kth video frame in the aligned first video sequence
  • thr 1 is a preset first threshold.
  • Step 3 Determine whether a mosaic effect occurs in the aligned first video sequence according to the intensity of the mosaic effect.
  • the first signal strength can be used as a basis for detecting performance parameters of the display device. For example, it can be used as an evaluation index for the sensitivity of a TV motherboard.
  • the performance parameter detecting system of the display device may include:
  • the obtaining module 10 is configured to obtain a first video sequence that is currently outputted from a video sequence whose signal strength outputted by the display device is a preset value;
  • the video sequence may be a higher quality video sequence, wherein the higher quality may mean that the signal strength is a signal strength corresponding to a mosaicless effect after being decoded and output by the display device.
  • the video signal generating device can be adjusted by the control device to output a higher quality video signal to the display device, and the display device can decode the video signal to obtain the video sequence.
  • the signal strength exceeds a certain range and the video quality is high.
  • the aligning module 20 is configured to perform an alignment operation on the first video sequence according to a pre-stored test sequence; wherein, the content of the first video sequence is part of the test sequence;
  • the first video sequence may be part of the test sequence, but the signal strength of the first video sequence may be different from the signal strength of the test sequence.
  • the video signal generating device continuously outputs the video signal, but it does not indicate which frame in the entire test sequence the image at that moment is.
  • the location of the video sequence to prepare for subsequent operations.
  • a distance metric function between the first video sequence and the test sequence may be calculated, and the first video sequence may be aligned according to the distance metric function.
  • the distance metric function is used to characterize the similarity between the first video sequence and the test sequence.
  • the distance metric function may be a function of any metric distance, as long as the metric value is smaller and more similar.
  • the distance metric function can be calculated according to equation (1). Then, the video sequence alignment operation can be performed according to the formula (2).
  • the adjustment module 30 is configured to adjust the signal strength of the aligned first video sequence to a first signal strength; wherein the first signal strength is after the aligned first video sequence is output by the display device The critical signal strength between the mosaic effect and the mosaic effect;
  • a frame-by-frame comparison can be taken to determine if there is a mosaic effect at the current time. If the mosaic effect does not appear, continue to adjust the signal strength of the first video sequence to determine again whether the mosaic effect occurs; this cycle until the mosaic effect occurs.
  • the critical signal strength of the aligned first video sequence from a no-mosaic effect to a mosaic effect may be set as the first signal strength.
  • the adjustment module 30 can determine whether the aligned first video sequence has a mosaic effect by:
  • the video frame of the aligned first video sequence may be divided into a plurality of non-overlapping regions
  • a quality evaluation function of each region may be calculated, and an intensity of a mosaic effect of the aligned first video sequence is calculated according to a quality evaluation function of each region; wherein the quality evaluation function is used to characterize the aligned Image quality of the first video sequence;
  • the quality evaluation function may be any function for evaluating image quality, such as a commonly used PSNR (Peak Signal to Noise Ratio), SSIM (structural similarity), etc., as long as the metric is satisfied. The larger the value, the more similar it is. In this way, the image quality of the aligned first video sequence can be obtained simply and flexibly.
  • PSNR Peak Signal to Noise Ratio
  • SSIM structural similarity
  • the intensity of the mosaic effect can be calculated according to formula (3).
  • the determining module 40 is configured to determine a performance parameter of the display device according to the first signal strength.
  • the first signal strength can be used as a basis for detecting performance parameters of the display device. For example, it can be used as the main TV Evaluation index of board sensitivity.
  • the performance parameter detecting system of the display device of the present invention has a one-to-one correspondence with the performance parameter detecting method of the display device of the present invention, and the technical features and beneficial effects described in the embodiments of the performance parameter detecting method of the above display device are all applicable to the display device. In the embodiment of the performance parameter detection system, it is hereby declared.

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Abstract

本发明涉及一种显示设备的性能参数检测方法和系统,其中,方法包括以下步骤:从显示设备输出的信号强度为预设值的视频序列中获取当前输出的第一视频序列;根据预存的测试序列对所述第一视频序列进行对齐操作;将对齐后的第一视频序列的信号强度调整为第一信号强度;其中,所述第一信号强度为所述对齐后的第一视频序列经所述显示设备输出后无马赛克效应与出现马赛克效应之间的临界信号强度;根据所述第一信号强度确定所述显示设备的性能参数。所述显示设备的性能参数检测方法和系统能够实现所述性能参数的自动检测,无需人工调节,也无需额外的硬件设备,成本低、效率高。

Description

显示设备的性能参数检测方法和系统 技术领域
本发明涉及信号检测技术领域,特别是涉及一种显示设备的性能参数检测方法和系统。
背景技术
显示设备是一种可输出图像或感触信息的设备。如果输入信号为电子信号,这种显示设备就会被称为电子显示设备,相对的还有机械显示设备。常见的显示设备包括电视机、电脑等。为了保证显示设备正常工作,通常需要对显示设备的一些性能参数进行检测。以电视机为例,电视机主板的灵敏度是电视机的一个重要性能性能参数。
现有的检测电视机主板灵敏度的方案是:通过专用设备发出视频信号,输出至电视机主板,然后再显示在电视机屏幕上;测试人员手工调节专用设备输出信号的强调,同时观察屏幕上是否出现马赛克效应。在马赛克出现的临界环节,对应的信号强度即为该电视机主板的灵敏度。还有一种方案是:通过解码芯片直接获取误码率(误码率的表现形式即为马赛克效应)。现有技术的缺点是:
(1)采用人工调节信号强度,人工观察是否出现马赛克效应,人工成本较高。
(2)通过芯片计算误码率,硬件成本高。
综上所述,现有技术对显示设备的性能参数检测成本高。
发明内容
基于此,有必要针对现有技术成本高的问题,提供一种显示设备的性能参数检测方法和系统。
一种显示设备的性能参数检测方法,包括以下步骤:
从显示设备输出的信号强度为预设值的视频序列中获取当前输出的第一视频序列;
根据预存的测试序列对所述第一视频序列进行对齐操作;其中,所述第一视频序列的内容为所述测试序列的一部分;
将对齐后的第一视频序列的信号强度调整为第一信号强度;其中,所述第一信号强度为所述对齐后的第一视频序列经所述显示设备输出后无马赛克效应与出现马赛克效应之间的临 界信号强度;
根据所述第一信号强度确定所述显示设备的性能参数。
一种显示设备的性能参数检测系统,包括:
获取模块,用于从显示设备输出的信号强度为预设值的视频序列中获取当前输出的第一视频序列;
对齐模块,用于根据预存的测试序列对所述第一视频序列进行对齐操作;其中,所述第一视频序列的内容为所述测试序列的一部分;
调整模块,用于将对齐后的第一视频序列的信号强度调整为第一信号强度;其中,所述第一信号强度为所述对齐后的第一视频序列经所述显示设备输出后无马赛克效应与出现马赛克效应之间的临界信号强度;
确定模块,用于根据所述第一信号强度确定所述显示设备的性能参数。
上述显示设备的性能参数检测方法和系统,通过从显示设备输出的信号强度为预设值的视频序列中获取当前输出的第一视频序列,对所述第一视频序列进行对齐操作,将对齐后的第一视频序列的信号强度调整为经所述显示设备输出后无马赛克效应与出现马赛克效应之间的临界信号强度,并根据该临界信号强度确定所述显示设备的性能参数,能够实现所述性能参数的自动检测,无需人工调节,也无需额外的硬件设备,成本低、效率高。
附图说明
图1为本发明的显示设备的性能参数检测方法流程图;
图2为本发明的显示设备的性能参数检测系统的结构示意图。
具体实施方式
下面结合附图对本发明的显示设备的性能参数检测方法和系统的实施例进行描述。
图1为本发明的显示设备的性能参数检测方法流程图。如图1所示,所述显示设备的性能参数检测方法可包括以下步骤:
S1,从显示设备输出的信号强度为预设值的视频序列中获取当前输出的第一视频序列;
在本步骤中,所述视频序列可以是质量较高的视频序列,其中,所述质量较高可以指所述信号强度为经所述显示设备解码输出后无马赛克效应对应的信号强度。可以通过控制设备 调节视频信号发生设备,向所述显示设备输出质量较高的视频信号,所述显示设备可对所述视频信号进行解码,得到所述视频序列。一般来说,信号强度超过一定范围,视频质量较高。
可设所述显示设备当前输出的第一视频序列为X=[x0,x1,...xn],其中,xi,i=1,2,…n为所述视频序列中的各个帧。
S2,根据预存的测试序列对所述第一视频序列进行对齐操作;其中,所述第一视频序列的内容为所述测试序列的一部分;
可设所述测试序列为Y=[y0,y1,...ym],其中,yi,i=1,2,…m为所述测试序列中的各个帧,m>>n。所述第一视频序列可以是所述测试序列的一部分,但所述第一视频序列的信号强度可以与所述测试序列的信号强度不同。
视频信号发生设备持续的输出视频信号,但它并不指明该时刻的图像是整个测试序列中的哪一帧。本步骤是将所述第一视频序列X与测试序列Y=[y0,y1,...ym](m>>n)对齐,即在整个测试序列中精确地定位所述第一视频序列的位置,从而为后续操作做好准备工作。
可计算所述第一视频序列与所述测试序列之间的距离度量函数,并根据所述距离度量函数对所述第一视频序列进行对齐操作。其中,所述距离度量函数用于表征所述第一视频序列与所述测试序列之间的相似度。所述距离度量函数可以是任意的度量距离的函数,只要满足度量值越小越相似即可。可根据如下公式计算所述距离度量函数:
Figure PCTCN2016112880-appb-000001
式中,X为所述第一视频序列,Yj为所述测试序列中与第一视频序列等长的序列,d(X,Yj)为所述第一视频序列与所述测试序列之间的距离度量函数,n为所述第一视频序列的帧数,xk为所述第一视频序列中的第k个视频帧,yj+k为所述测试序列中的第j+k个视频帧,k为0到n之间的整数,j是0到m-k之间的常数,m为测试序列的帧长度。
可根据如下公式进行对齐操作:
Figure PCTCN2016112880-appb-000002
式中,X为所述第一视频序列,Yj为所述测试序列中与第一视频序列等长的序列,d(X,Yj)为所述第一视频序列与所述测试序列之间的距离度量函数,J为所述第一视频序列与所述测试序列的时间对齐点,j是0到m-k之间的常数,m为测试序列的帧长度。
S3,将对齐后的第一视频序列的信号强度调整为第一信号强度;其中,所述第一信号强度为所述对齐后的第一视频序列经所述显示设备输出后无马赛克效应与出现马赛克效应之间的临界信号强度;
一旦第一视频序列与测试序列对齐后,就可以采取逐帧对比的方式,判定当前时刻是否存在马赛克效应。若未出现马赛克效应,可继续调整第一视频序列的信号强度,再次判断是否出现马赛克效应;如此循环,直到出现马赛克效应为止。可将所述对齐后的第一视频序列从无马赛克效应到出现马赛克效应的临界信号强度设为第一信号强度。
可通过以下方式判断对齐后的第一视频序列是否出现马赛克效应:
步骤1:将对齐后的第一视频序列的视频帧划分为若干个不重叠的区域;
步骤2:计算各个区域的质量评价函数,并根据各个区域的质量评价函数计算所述对齐后的第一视频序列的马赛克效应的强度;其中,所述质量评价函数用于表征所述对齐后的第一视频序列的图像质量;
其中,所述质量评价函数可为任意的用于评价图像质量的函数,例如常用的PSNR(Peak Signal to Noise Ratio,峰值信噪比),SSIM(structural similarity,结构相似性)等,只要满足度量值越大越相似即可。通过这种方式,可以简便、灵活地得到所述对齐后的第一视频序列的图像质量。
可根据如下公式计算所述马赛克效应的强度:
Figure PCTCN2016112880-appb-000003
其中,
Figure PCTCN2016112880-appb-000004
式中,I为所述对齐后的第一视频序列的马赛克效应的强度,
Figure PCTCN2016112880-appb-000005
为1表示出现马赛克效应,
Figure PCTCN2016112880-appb-000006
为0表示未出现马赛克效应,
Figure PCTCN2016112880-appb-000007
为质量评价函数,
Figure PCTCN2016112880-appb-000008
为对齐后的第一视频序列中第k个视频帧的第a个区域,
Figure PCTCN2016112880-appb-000009
为所述测试序列中与所述第一视频序列对应的视频序列的第k个视频帧的第a个区域,thr1为预设的第一阈值。
步骤3:根据所述马赛克效应的强度判断对齐后的第一视频序列是否出现马赛克效应。
可将所述马赛克效应的强度与预设的第二阈值进行比较;若所述马赛克效应的强度大于所述第二阈值,可判定对齐后的第一视频序列出现马赛克效应;否则,可判定对齐后的第一视频序列未出现马赛克效应。
S4,根据所述第一信号强度确定所述显示设备的性能参数。
所述第一信号强度可作为检测所述显示设备的性能参数的依据。例如,可作为电视机主板灵敏度的评价指标。
本发明的显示设备的性能参数检测方法具有以下优点:
(1)无需人工调节信号强度、人工观察是否出现马赛克效应,人工成本低,方法简便,效率高。
(2)无需额外的硬件设备,硬件成本低。
图2为本发明的显示设备的性能参数检测系统的结构示意图。如图2所示,所述显示设备的性能参数检测系统可包括:
获取模块10,用于从显示设备输出的信号强度为预设值的视频序列中获取当前输出的第一视频序列;
所述视频序列可以是质量较高的视频序列,其中,所述质量较高可以指所述信号强度为经所述显示设备解码输出后无马赛克效应对应的信号强度。可以通过控制设备调节视频信号发生设备,向所述显示设备输出质量较高的视频信号,所述显示设备可对所述视频信号进行解码,得到所述视频序列。一般来说,信号强度超过一定范围,视频质量较高。
可设所述显示设备当前输出的第一视频序列为X=[x0,x1,...xn],其中,xi,i=1,2,…n为所述视频序列中的各个帧。
对齐模块20,用于根据预存的测试序列对所述第一视频序列进行对齐操作;其中,所述第一视频序列的内容为所述测试序列的一部分;
可设所述测试序列为Y=[y0,y1,...ym],其中,yi,i=1,2,…m为所述测试序列中的各个帧,m>>n。所述第一视频序列可以是所述测试序列的一部分,但所述第一视频序列的信号强度可以与所述测试序列的信号强度不同。
视频信号发生设备持续的输出视频信号,但它并不指明该时刻的图像是整个测试序列中的哪一帧。本步骤是将所述第一视频序列X与测试序列Y=[y0,y1,...ym](m>>n)对齐,即在整个测试序列中精确地定位所述第一视频序列的位置,从而为后续操作做好准备工作。
可计算所述第一视频序列与所述测试序列之间的距离度量函数,并根据所述距离度量函数对所述第一视频序列进行对齐操作。其中,所述距离度量函数用于表征所述第一视频序列与所述测试序列之间的相似度。所述距离度量函数可以是任意的度量距离的函数,只要满足度量值越小越相似即可。可根据公式(1)计算所述距离度量函数。然后,可根据公式(2)进行视频序列对齐操作。
调整模块30,用于将对齐后的第一视频序列的信号强度调整为第一信号强度;其中,所述第一信号强度为所述对齐后的第一视频序列经所述显示设备输出后无马赛克效应与出现马赛克效应之间的临界信号强度;
一旦第一视频序列与测试序列对齐后,就可以采取逐帧对比的方式,判定当前时刻是否存在马赛克效应。若未出现马赛克效应,可继续调整第一视频序列的信号强度,再次判断是否出现马赛克效应;如此循环,直到出现马赛克效应为止。可将所述对齐后的第一视频序列从无马赛克效应到出现马赛克效应的临界信号强度设为第一信号强度。
调整模块30可通过以下方式判断对齐后的第一视频序列是否出现马赛克效应:
首先,可将对齐后的第一视频序列的视频帧划分为若干个不重叠的区域;
然后,可计算各个区域的质量评价函数,并根据各个区域的质量评价函数计算所述对齐后的第一视频序列的马赛克效应的强度;其中,所述质量评价函数用于表征所述对齐后的第一视频序列的图像质量;
其中,所述质量评价函数可为任意的用于评价图像质量的函数,例如常用的PSNR(Peak Signal to Noise Ratio,峰值信噪比),SSIM(structural similarity,结构相似性)等,只要满足度量值越大越相似即可。通过这种方式,可以简便、灵活地得到所述对齐后的第一视频序列的图像质量。
可根据公式(3)计算所述马赛克效应的强度。
最后,可根据所述马赛克效应的强度判断对齐后的第一视频序列是否出现马赛克效应。
可将所述马赛克效应的强度与预设的第二阈值进行比较;若所述马赛克效应的强度大于所述第二阈值,可判定对齐后的第一视频序列出现马赛克效应;否则,可判定对齐后的第一视频序列未出现马赛克效应。
确定模块40,用于根据所述第一信号强度确定所述显示设备的性能参数。
所述第一信号强度可作为检测所述显示设备的性能参数的依据。例如,可作为电视机主 板灵敏度的评价指标。
本发明的显示设备的性能参数检测系统具有以下优点:
(1)无需人工调节信号强度、人工观察是否出现马赛克效应,人工成本低,方法简便,效率高。
(2)无需额外的硬件设备,硬件成本低。
本发明的显示设备的性能参数检测系统与本发明的显示设备的性能参数检测方法一一对应,在上述显示设备的性能参数检测方法的实施例阐述的技术特征及其有益效果均适用于显示设备的性能参数检测系统的实施例中,特此声明。
以上所述实施例的各技术特征可以进行任意的组合,为使描述简洁,未对上述实施例中的各个技术特征所有可能的组合都进行描述,然而,只要这些技术特征的组合不存在矛盾,都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式,其描述较为具体和详细,但并不能因此而理解为对发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。因此,本发明专利的保护范围应以所附权利要求为准。

Claims (10)

  1. 一种显示设备的性能参数检测方法,其特征在于,包括以下步骤:
    从显示设备输出的信号强度为预设值的视频序列中获取当前输出的第一视频序列;
    根据预存的测试序列对所述第一视频序列进行对齐操作;其中,所述第一视频序列的内容为所述测试序列的一部分;
    将对齐后的第一视频序列的信号强度调整为第一信号强度;其中,所述第一信号强度为所述对齐后的第一视频序列经所述显示设备输出后无马赛克效应与出现马赛克效应之间的临界信号强度;
    根据所述第一信号强度确定所述显示设备的性能参数。
  2. 根据权利要求1所述的显示设备的性能参数检测方法,其特征在于,根据预存的测试序列对所述第一视频序列进行对齐操作的步骤包括:
    计算所述第一视频序列与所述测试序列之间的距离度量函数;其中,所述距离度量函数表征所述第一视频序列与所述测试序列中对应长度的序列之间的相似度;
    根据所述距离度量函数对所述第一视频序列进行对齐操作。
  3. 根据权利要求2所述的显示设备的性能参数检测方法,其特征在于,计算所述第一视频序列与所述测试序列之间的距离度量函数的步骤包括:
    根据如下公式计算所述距离度量函数:
    Figure PCTCN2016112880-appb-100001
    式中,X为所述第一视频序列,Yj为所述测试序列中与第一视频序列等长的序列,d(X,Yj)为所述第一视频序列与所述测试序列之间的距离度量函数,n为所述第一视频序列的帧数,xk为所述第一视频序列中的第k个视频帧,yj+k为所述测试序列中的第j+k个视频帧,k为0到n之间的整数,j是0到m-k之间的常数,m为测试序列的帧长度。
  4. 根据权利要求3所述的显示设备的性能参数检测方法,其特征在于,根据所述距离度量函数对所述第一视频序列进行对齐操作的步骤包括:
    根据如下公式进行对齐操作:
    式中,X为所述第一视频序列,Yj为所述测试序列中与第一视频序列等长的序列,d(X,Yj)为所述第一视频序列与所述测试序列之间的距离度量函数,J为所述第一视频序列与所述测试序列的时间对齐点,j是0到m-k之间的常数,m为测试序列的帧长度。
  5. 根据权利要求1所述的显示设备的性能参数检测方法,其特征在于,将对齐后的第一视频序列的信号强度调整为第一信号强度的步骤包括:
    判断对齐后的第一视频序列是否出现马赛克效应;
    若未出现马赛克效应,则调整对齐后的第一视频序列的信号强度,在所述对齐后的第一视频序列出现马赛克效应时止,并将对应的信号强度设为所述第一信号强度。
  6. 根据权利要求5所述的显示设备的性能参数检测方法,其特征在于,所述第一信号强度为所述对齐后的第一视频序列从无马赛克效应到出现马赛克效应的临界信号强度。
  7. 根据权利要求5所述的显示设备的性能参数检测方法,其特征在于,判断对齐后的第一视频序列是否出现马赛克效应的步骤包括:
    将对齐后的第一视频序列的视频帧划分为若干个不重叠的区域;
    计算各个区域的质量评价函数,并根据各个区域的质量评价函数计算所述对齐后的第一视频序列的马赛克效应的强度;其中,所述质量评价函数表征所述对齐后的第一视频序列的图像质量;
    根据所述马赛克效应的强度判断对齐后的第一视频序列是否出现马赛克效应。
  8. 根据权利要求7所述的显示设备的性能参数检测方法,其特征在于,根据各个区域的质量评价函数计算所述对齐后的第一视频序列的马赛克效应的强度的步骤包括:
    根据如下公式计算所述马赛克效应的强度:
    Figure PCTCN2016112880-appb-100003
    其中,
    Figure PCTCN2016112880-appb-100004
    式中,I为所述对齐后的第一视频序列的马赛克效应的强度,
    Figure PCTCN2016112880-appb-100005
    为质量评价函数,
    Figure PCTCN2016112880-appb-100006
    为对齐后的第一视频序列的第k个视频帧的第a个区域,
    Figure PCTCN2016112880-appb-100007
    为所述测试序列中与所述第一 视频序列对应的视频序列的第k个视频帧的第a个区域,thr1为预设的第一阈值。
  9. 根据权利要求7所述的显示设备的性能参数检测方法,其特征在于,根据所述马赛克效应的强度判断对齐后的第一视频序列是否出现马赛克效应的步骤包括:
    将所述马赛克效应的强度与预设的第二阈值进行比较;
    若所述马赛克效应的强度大于所述第二阈值,则判定对齐后的第一视频序列出现马赛克效应;否则,判定对齐后的第一视频序列未出现马赛克效应。
  10. 一种显示设备的性能参数检测系统,其特征在于,包括:
    获取模块,用于从显示设备输出的信号强度为预设值的视频序列中获取当前输出的第一视频序列;
    对齐模块,用于根据预存的测试序列对所述第一视频序列进行对齐操作;其中,所述第一视频序列的内容为所述测试序列的一部分;
    调整模块,用于将对齐后的第一视频序列的信号强度调整为第一信号强度;其中,所述第一信号强度为所述对齐后的第一视频序列经所述显示设备输出后无马赛克效应与出现马赛克效应之间的临界信号强度;
    确定模块,用于根据所述第一信号强度确定所述显示设备的性能参数。
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