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    • 2. 发明申请
    • CONTRAST ENHANCEMENT OF IMAGES
    • 对比度增强图像
    • WO2010043996A2
    • 2010-04-22
    • PCT/IB2009/054336
    • 2009-10-05
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.LANGENDIJK, Erno, H., A.MUIJS, Remco, T., J.SCHMEITZ, Harold, A., W.VELTHOVEN, Leo, J.
    • LANGENDIJK, Erno, H., A.MUIJS, Remco, T., J.SCHMEITZ, Harold, A., W.VELTHOVEN, Leo, J.
    • H04N1/60
    • H04N1/6027
    • An apparatus is arranged to perform contrast enhancement for one or more color images. The apparatus comprises an image source (101) which provides the color image having color values for image areas, where each image area may specifically correspond to a pixel. A contrast enhancement processor (103) performs contrast enhancement on the color image by modifying a luminance characteristic for at least some image areas in response to the color value for the image area. The contrast enhancement processor (103) may specifically generate compensated luminance values for pixels by normalizing luminance values relative to a nominal luminance value for the color of the pixels. A luminance contrast enhancement is then performed on the compensated luminance values. The approach may allow improved image quality and may in particular reduce introduction of unnatural shadowing effects due to color variations.
    • 设备被布置为对一个或多个彩色图像执行对比度增强。 该设备包括图像源(101),其提供具有图像区域的颜色值的彩色图像,其中每个图像区域可以具体对应于像素。 对比度增强处理器(103)响应于图像区域的颜色值通过修改至少一些图像区域的亮度特性来对彩色图像执行对比度增强。 对比度增强处理器(103)可以通过相对于像素的颜色的标称亮度值归一化亮度值来具体地生成像素的补偿亮度值。 然后对经补偿的亮度值执行亮度对比度增强。 该方法可以改善图像质量,并且特别可以减少由于颜色变化引入的不自然阴影效应。
    • 6. 发明申请
    • A COLOR MAPPING METHOD
    • 彩色绘图方法
    • WO2008044177A1
    • 2008-04-17
    • PCT/IB2007/054058
    • 2007-10-05
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.LANGENDIJK, Erno, H., A.
    • LANGENDIJK, Erno, H., A.
    • G09G5/06H04N9/67
    • G09G5/02G09G3/2074G09G3/3611G09G2300/0439G09G2300/0452G09G2340/06H04N9/3114H04N9/67
    • A color mapping method maps an input image signal (IS) into an output image signal (OS) for a display (DD) with display pixels (Pi) having sub-pixels (RP, GP, BP, YP) with primary colors (RW, GW, BW, YW) defining a display color gamut (WG). A look-up table (1) comprises stored luminances (LU) of reflective spectra (RS) at different chromaticities (λO) within the display color gamut (WG). The reflective spectra (RS) are spectra of reflective objects (RO) having a substantial maximum reflectivity at the corresponding chromaticities (λO). The color mapping method comprises a gamut mapping (2), retrieving (3) a looked-up luminance (Yl), a factor determination (4), and adapting the mapped luminance (Ym; Y). The gamut mapping (2) maps the input image signal (IS) having input pixel colors defined by an input luminance (Y) and an input chromaticity (x, y) into a mapped image signal (MS) having corresponding mapped pixel colors defined by a mapped luminance (Ym; Y) and a mapped chromaticity (xm, ym). The input pixel colors lie within an input color gamut different than the display color gamut (WG). The looked-up luminance (Yl) is retrieved (3) by looking up the stored luminance (LU) in the look-up table (1) at the mapped chromaticity (xm, ym). The factor (F) is determined (4) from a difference between the looked-up luminance (Yl) and the mapped luminance (Ym; Y). The mapped luminance (Ym; Y) is adapted (5) by using the factor (F; G) to obtain an output luminance (Ys) nearer to the looked-up luminance (Yl) than the mapped luminance (Ym). The image output signal (OS) is defined by the mapped chromaticity (xm, ym) and the output luminance (Ys).
    • 颜色映射方法将输入图像信号(IS)映射到具有基本颜色的子像素(RP,GP,BP,YP)的显示像素(Pi)的显示器(DD)的输出图像信号(OS)(RW ,GW,BW,YW)来定义显示色域(WG)。 查找表(1)包括在显示色域(WG)内的不同色度(ΔO)的反射光谱(RS)的存储亮度(LU)。 反射光谱(RS)是在相应色度(ΔO)下具有相当大的最大反射率的反射物体(RO)的光谱。 颜色映射方法包括色域映射(2),检索(3)查找亮度(Y1),因子确定(4)和调整映射亮度(Ym; Y)。 色域映射(2)将具有由输入亮度(Y)和输入色度(x,y)定义的输入像素颜色的输入图像信号(IS)映射为具有对应的映射像素颜色的映射图像信号(MS) 映射亮度(Ym; Y)和映射色度(xm,ym)。 输入像素颜色位于与显示色域(WG)不同的输入色域内。 通过在映射色度(xm,ym)处查找查找表(1)中的存储亮度(LU)来检索查找亮度(Y1)(3)。 从查找亮度(Y1)和映射亮度(Ym; Y)之间的差确定因子(F)(4)。 通过使用因子(F; G)来适应(5)所映射的亮度(Ym; Y),以获得比映射亮度(Ym)更接近查找亮度(Y1)的输出亮度(Ys)。 图像输出信号(OS)由映射的色度(xm,ym)和输出亮度(Ys)定义。
    • 7. 发明申请
    • A METHOD AND APPARATUS OF CONVERTING SIGNALS FOR DRIVING A DISPLAY AND A DISPLAY USING THE SAME
    • 用于驱动显示器的转换信号和使用该显示器的显示器的方法和装置
    • WO2007004194A2
    • 2007-01-11
    • PCT/IB2006/052244
    • 2006-07-04
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.LANGENDIJK, Erno, H., A.
    • LANGENDIJK, Erno, H., A.
    • G09G3/20
    • G09G5/02G09G3/2003G09G2300/0452G09G2340/06
    • A method, apparatus and computer program for driving displays including an array of display elements, each element comprising sub-pixels or red, green, blue and white colours, the method comprising steps of; receiving input signals for controlling red, green and blue colours of each element of the display; processing the input signals to generate corresponding red, green, blue and white output drive signals for the red, green, blue and white sub-pixels of each element, all input colours which are outside of the output gamut being mapped to within a predetermined area of the output gamut and all input colours within the predetermined area of the output gamut being mapped to another colour within the predetermined area of the output gamut; and applying the output drive signals to respective sub-pixels for each element of the display.
    • 一种用于驱动显示器的方法,装置和计算机程序,包括显示元件阵列,每个元件包括子像素或红色,绿色,蓝色和白色,所述方法包括以下步骤: 接收用于控制显示器的每个元件的红色,绿色和蓝色的输入信号; 处理输入信号以产生用于每个元件的红色,绿色,蓝色和白色子像素的相应的红色,绿色,蓝色和白色输出驱动信号,所有在输出色域之外的输入颜色被映射到预定区域内 输出色域的预定区域内的所有输入颜色被映射到输出色域的预定区域内的另一种颜色; 以及将输出驱动信号应用于显示器的每个元件的各个子像素。
    • 8. 发明申请
    • ARRANGEMENT TO AVOID SHARP LUMINANCE EDGES IN A SEGMENTED LIGHT OUTPUT DEVICE
    • 避免在边界灯光输出设备中的闪光灯边缘的布置
    • WO2009138924A1
    • 2009-11-19
    • PCT/IB2009/051893
    • 2009-05-08
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.STROEMER, Jan, F.LANGENDIJK, Erno, H., A.
    • STROEMER, Jan, F.LANGENDIJK, Erno, H., A.
    • G02F1/01G02F1/13357F21S2/00
    • G02F1/133615G02F1/011
    • A light output device (1) comprising: a first segment (2d) controllable to have a first luminance; a second segment (2e) adjacent to the first segmentandcontrollable to have a second luminance higher than the first luminance; and a border region (3)locatedat an interface between the first (2d) and second (2e) segmentsandcomprising a first segment portion (31) and a second segment portion (32), wherein the first (2d) and second (2e) 5 segments are configured such that the border region (3) has a luminance higher than the first luminance and lower than the second luminance when the first segment (2d) has the first luminance and the second segment (2e) has the second luminance. The border region makes the luminance transition between adjacent segments of different luminance levels less abrupt. The contrast between such adjacent segments as 10 perceived by a user is reducedthereby. Thus, it may be prevented that a clear line is visible at the interface between the segments even though the difference in luminance is substantial.
    • 一种光输出装置(1),包括:可控制为具有第一亮度的第一部分(2d) 邻近所述第一段的第二段(2e),并且可控制地具有高于所述第一亮度的第二亮度; 以及位于第一(2d)和第二(2e)段之间的界面处并且包含第一段部分(31)和第二段部分(32)的边界区域(3),其中第一(2d)和第二(2e)5 在第一段(2d)具有第一亮度且第二段(2e)具有第二亮度时,边界区域(3)具有高于第一亮度的亮度并低于第二亮度。 边界区域使得不同亮度级别的相邻片段之间的亮度转变不太突然。 由用户感知到的这样的相邻片段之间的对比度减小了。 因此,即使亮度差很大,也可以防止在片段之间的界面处看到清晰的线。
    • 9. 发明申请
    • IMAGE GAMUT MAPPING
    • 图像游戏绘图
    • WO2008020393A1
    • 2008-02-21
    • PCT/IB2007/053209
    • 2007-08-13
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.MUIJS, Remco, T., J.LANGENDIJK, Erno, H., A.
    • MUIJS, Remco, T., J.LANGENDIJK, Erno, H., A.
    • H04N1/60
    • H04N1/6058
    • A method of gamut mapping maps an input image composed of pixels and having an input gamut (IG) defined by input RGB primaries (Ri, Gi, Bi) to a reproduction gamut (RG) defined by reproduction RGB primaries (Ro, Go, Bo). The reproduction gamut (RG) is narrower than the input gamut (IG). An input signal (RGBin) defined with respect to the input RGB primaries (Ri, Gi, Bi) is color transformed (1) into a transformed signal (RGBt) defined with respect to the reproduction RGB primaries (Ro, Go, Bo), whereby color information of the pixels (Pl, P2, P3) within the reproduction gamut (RG) is preserved. Scaling factors (SFi) indicating a distance between on the one hand pixels (Pl, P2, P3) of the transformed signal (RGBt) which are outside the reproduction gamut (RG), and on the other hand an edge of the reproduction gamut (RG) are determined (2). The scaling factors (SFi) of pixels (Pl, P2, P3) of the transformed signal (RGBt) are spatial low-pass filtered (3) to obtain filtered factors (FFi) for these pixels (Pl, P2, P3). Component signal values of the transformed signal (RGBt) of the pixels (Pl, P2, P3) are corrected (4) in response to the filtered factors (FFi) to obtain reproduction signal values (RGBo) which are input values (RGBi) moved towards inside the reproduction gamut (RG).
    • 色域映射的方法将由像素组成的输入图像映射到由RGB RGB原色(Ro,Go,Bo)定义的再现色域(RG)的输入RGB原色(Ri,Gi,Bi)定义的输入色域(IG) )。 再现色域(RG)比输入色域(IG)窄。 相对于输入RGB原色(Ri,Gi,Bi)定义的输入信号(RGBin)被颜色变换(1)成相对于再现RGB原色(Ro,Go,Bo)定义的变换信号(RGBt) 从而保持再现色域(RG)内的像素(P1,P2,P3)的颜色信息。 指示在再现色域(RG)之外的变换信号(RGBt)的一方像素(P1,P2,P3)之间的距离的缩放因子(SFi),另一方面指示再现色域的边缘 RG)(2)。 变换信号(RGBt)的像素(P1,P2,P3)的缩放因子(SFi)被空间低通滤波(3),以获得这些像素(P1,P2,P3)的滤波因子(FFi)。 根据滤波因子(FFi)对像素(P1,P2,P3)的变换信号(RGBt)的分量信号值进行校正(4),以获得作为输入值(RGBi)移动的再现信号值(RGBo) 朝向再现色域(RG)内。