DISPLAY MANAGEMENT WITH POSITION-VARYING ADAPTIVITY TO AMBIENT LIGHT AND/OR NON-DISPLAY-ORIGINATING SURFACE LIGHT

    公开(公告)号:WO2022245624A1

    公开(公告)日:2022-11-24

    申请号:PCT/US2022/028928

    申请日:2022-05-12

    Inventor: WANAT, Robert

    Abstract: Methods are disclosed for adaptive display management using one or more viewing environment parameters. Given the one or more viewing environment parameters, an effective luminance range for a target display, and an input image, a tone-mapped image is generated based on a tone-mapping curve, an original PQ luminance mapping function, and the effective luminance range of the display. Corrected PQ (PQ') luminance mapping functions are generated according to the viewing environment parameters and, optionally, the transmissivity properties and reflectivity properties of the target display. PQ-to-PQ' mappings are generated, where each corrected (PQ') luminance mapping function is associated with a different set of viewing environment parameters and is associated with a different region of the display and where codewords in the original PQ luminance mapping function are mapped to codewords in the corrected (PQ') luminance mapping functions, and an adjusted tone-mapped image is generated based on the PQ-to-PQ' mappings.

    撮像装置
    2.
    发明申请
    撮像装置 审中-公开

    公开(公告)号:WO2021014560A1

    公开(公告)日:2021-01-28

    申请号:PCT/JP2019/028815

    申请日:2019-07-23

    Abstract: 撮像装置(100)は、被写体像を撮像して画像信号を生成する撮像部(140)と、撮像部により生成された画像信号に所定の処理を行って、画像を示す画像データを生成する画像処理部(160)と、画像における輝度レベルに関する輝度レベル情報を表示する表示部(220)と、ユーザの操作を入力する操作部(210)と、表示部および操作部を制御する制御部(180)とを備える。画像処理部は、画像信号における光量が大きくなるほど圧縮して輝度レベルを対応付ける所定のガンマ曲線を用いて、画像データを生成する。制御部は、操作部において輝度レベル情報における輝度レベルを設定するユーザ操作を受け付ける際に、当該輝度レベルが、ガンマ曲線において対応する光量の倍率を示すストップ数によって表されるように、表示部を制御する。

    显示画面的对比度调节方法、显示器和可读存储介质

    公开(公告)号:WO2019105034A1

    公开(公告)日:2019-06-06

    申请号:PCT/CN2018/093745

    申请日:2018-06-29

    Inventor: 陈奕鑫 谢仁礼

    Abstract: 本申请公开了一种显示画面的对比度调节方法,所述显示画面的对比度调节方法包括以下步骤:在接收到图像信号时,根据所述图像信号获取待显示画面以及编码信息,并计算所述待显示画面各个像素点对应的信号幅度值;根据各个所述信号幅度值生成信号幅度分布的直方图,并根据所述直方图获取所述待显示画面的显示信息以及背光调节参数;根据所述显示信息、所述背光调节参数以及编码信息生成信号调节函数,并根据所述信号调节函数调节各个所述像素点的所述信号幅度值,以调节所述待显示画面的对比度。本申请还公开一种显示器和可读存储介质。本申请显示画面对比度的提升成本低。

    APPARATUS AND METHOD FOR AUTOMATICALLY COMPUTING GAMMA CORRECTION CURVE
    7.
    发明申请
    APPARATUS AND METHOD FOR AUTOMATICALLY COMPUTING GAMMA CORRECTION CURVE 审中-公开
    用于自动计算伽马校正曲线的装置和方法

    公开(公告)号:WO2009002111A1

    公开(公告)日:2008-12-31

    申请号:PCT/KR2008/003694

    申请日:2008-06-26

    Inventor: KIM, Min-Seok

    CPC classification number: H04N5/202

    Abstract: The present invention relates to apparatus and method for automatically computing a gamma correction curve. The apparatus according to the present invention comprises an image obtaining unit for receiving an input image data of a color chart through an image interface; a coordinate calculating unit for measuring input brightness values of a plurality of ROIs (Regions of Interest) of the input image and comparing an input brightness value of each ROI with a preset target brightness value of each ROI to calculate gamma correction coordinates for a plurality of points of a gamma correction curve; and a curve computing unit for applying interpolation to a plurality of the calculated gamma correction coordinates to compute a gamma correction curve.

    Abstract translation: 本发明涉及用于自动计算伽马校正曲线的装置和方法。 根据本发明的装置包括:图像获取单元,用于通过图像界面接收彩色图表的输入图像数据; 坐标计算单元,用于测量输入图像的多个ROI(感兴趣区域)的输入亮度值,并将每个ROI的输入亮度值与每个ROI的预设目标亮度值进行比较,以计算多个ROI的伽马校正坐标 伽马校正曲线的点; 以及曲线计算单元,用于对多个所计算的伽马校正坐标进行插值以计算伽马校正曲线。

    PROCESS, APPARATUS AND COMPUTER PROGRAM FOR ENHANCING DETAIL VISIBILITY IN AN INPUT IMAGE
    8.
    发明申请
    PROCESS, APPARATUS AND COMPUTER PROGRAM FOR ENHANCING DETAIL VISIBILITY IN AN INPUT IMAGE 审中-公开
    过程,设备和计算机程序,用于增强输入图像中的细节可视性

    公开(公告)号:WO2008061567A1

    公开(公告)日:2008-05-29

    申请号:PCT/EP2006/068863

    申请日:2006-11-24

    CPC classification number: H04N5/202 H04N1/4074

    Abstract: In the technical field of video cameras gamma correction is an often used technique to compensate the non-linear effects of the CRT (cathode ray tube), in order to enhance visibility in images to be displayed. Gamma correction is -by way of example- expressed by the gamma function: A process for enhancing detail visibility in an input image comprising a step of applying a first transfer function (11) to the input image, thereby generating an intermediate image; a step of performing a statistical measurement (12), Mmt (2) on the intermediate image; a step of applying a second transfer function (14) to the intermediate image, thereby generating an output image; a step of performing a statistical measurement (15), Mmt (3) on the output image, a step of determining gain parameters gg, gk for the first and the second transfer function (11, 14) on basis of the statistical measurement results (8, 12, 15), Mmt (1), Mmt (2), Mmt (3) is proposed.

    Abstract translation: 在摄像机的技术领域中,为了增强要显示的图像的可视性,伽马校正是用于补偿CRT(阴极射线管)的非线性效应的常用技术。 伽马校正是以伽马函数表示的:用于增强输入图像中的细节可视性的过程,包括将第一传递函数(11)应用于输入图像的步骤,从而生成中间图像; 在中间图像上执行统计测量(12),Mmt(2)的步骤; 将第二传递函数(14)应用于中间图像,从而生成输出图像的步骤; 对输出图像执行统计测量(15),Mmt(3)的步骤,基于统计测量结果确定第一和第二传递函数(11,14)的增益参数gg,gk的步骤 8,12,15),Mmt(1),Mmt(2),Mmt(3)。

    GAMMA CORRECTION CIRCUIT
    10.
    发明申请
    GAMMA CORRECTION CIRCUIT 审中-公开
    伽马校正电路

    公开(公告)号:WO2003069895A1

    公开(公告)日:2003-08-21

    申请号:PCT/IB2003/000413

    申请日:2003-02-05

    CPC classification number: H04N5/202

    Abstract: A gamma correction circuit for correcting a digital video signal, the circuit comprising first (6) and second (8) lookup tables for storing discrete output intensity data and the associated slope data of a non-linear transfer function, respectively, for each of the discrete input video signal intensities, an adder (10) having a first input connected to the output of the first lookup table, a multiplier (12) having a first input connected to the output of the second look-up table (8), characterized by a quantizer (4) for providing the most significant bits of the incoming video signal to address the first (6) and second (8) lookup tables and to transfer the corresponding output intensity data to the adder (10) and the associated slope data to the multiplier (12), the quantizer (4) transmitting the remaining least significant bits of the input video signal to the second input of the multiplier (12), the multiplier (12) multiplying the slope data with the remaining least significant bits and feeding the multiplication result to the second input of the adder (10), the adder (10) adding the output intensity data and the multiplication result to generate a corrected video signal.

    Abstract translation: 一种用于校正数字视频信号的伽马校正电路,该电路包括分别用于存储离散输出强度数据和非线性传递函数的相关斜率数据的第一(6)和第二(8)查找表, 离散输入视频信号强度,具有连接到第一查找表的输出的第一输入的加法器(10),具有连接到第二查找表(8)的输出的第一输入的乘法器(12),其特征在于 通过量化器(4),用于提供输入视频信号的最高有效位以寻址第一(6)和第二(8)查找表,并将相应的输出强度数据传送到加法器(10)和相关联的斜率数据 到乘法器(12),量化器(4)将输入视频信号的剩余最低有效位传送到乘法器(12)的第二输入,乘法器(12)将斜率数据与剩余的最低有效位 并将相乘结果馈送到加法器(10)的第二输入端,加法器(10)将输出强度数据和相乘结果相加以产生经校正的视频信号。

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