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    • 7. 发明授权
    • Transforms for display or printing digital images
    • 转换显示或打印数字图像
    • US06809838B1
    • 2004-10-26
    • US09691866
    • 2000-10-19
    • Paul B. GilmanJohn F. Hamilton, Jr.Edward J. Giorgianni
    • Paul B. GilmanJohn F. Hamilton, Jr.Edward J. Giorgianni
    • G06F1500
    • H04N1/6097H04N1/608
    • A method for constructing a transform for a predetermined display or printer, such printer or display being adapted to form a color image, on a particular medium, with extended chroma values while maintaining existing luminance values, the input to the transform including an input color digital image produced by a particular image capture device, the method includes providing a luminance reproduction curve in response to the input color digital image which, for any input luminance value, will produce an output luminance value, the luminance reproduction curve being selected to preserve highlight and midtone contrast, and shadow detail from the input color digital image; providing a plurality of selective luminance independent chromatic reproduction curves in response to the input color digital image which, for any input chroma value, will produce an output chroma value; and the chromatic reproduction curves being selected so that each curve is a function of the visual density range of the display or medium and the image chroma values wherein small chroma values remain unchanged and large chroma values are modified to extend chroma values while maintaining existing luminance values for a particular device or medium whereby a user can select one or more of the chromatic reproduction curves which, in combination with the luminance reproduction curve, produces color digital images so that a selected printer or display can form a color image, on a particular medium, with extended chroma values.
    • 一种用于在保持现有亮度值的情况下,在具有扩展色度值的特定介质上构造用于预定显示器或打印机的这种打印机或显示器的这种打印机或显示器的变换的方法,所述变换的输入包括输入颜色数字 该方法包括响应于输入彩色数字图像提供亮度再现曲线,对于任何输入亮度值将产生输出亮度值,选择亮度再现曲线以保持高光,并且 中间色对比度和阴影细节从输入彩色数字图像; 提供响应于输入彩色数字图像的多个选择性亮度独立的彩色再现曲线,对于任何输入色度值,其将产生输出色度值; 并且选择彩色再现曲线,使得每个曲线是显示器或介质的视觉浓度范围的函数,以及其中小色度值保持不变并且修改大色度值以增加色度值同时保持现有亮度值的图像色度值 对于特定的设备或介质,用户可以选择一个或多个彩色再现曲线,其与亮度再现曲线结合产生彩色数字图像,使得所选择的打印机或显示器可以在特定介质上形成彩色图像 ,具有扩展色度值。
    • 8. 发明授权
    • Transform for digital images
    • 数字图像变换
    • US06229624B1
    • 2001-05-08
    • US09057903
    • 1998-04-09
    • Paul B. GilmanJohn F. Hamilton, Jr.Richard M. Vogel
    • Paul B. GilmanJohn F. Hamilton, Jr.Richard M. Vogel
    • B41B1500
    • H04N1/6027H04N1/6086H04N1/6088H04N1/6097
    • A method for selecting an aim curve for a desired medium having a predetermined maximum density, including selecting an aim curve from a family of aim curves for a different medium having a lower predetermined maximum density than that of the desired medium, the aim curve having shadow, midtone, and highlight regions; varying the shadow contrast in the shadow region of the selected aim curve to produce a different aim curve; and determining the different aim curve with the desired medium that has an improved shadow contrast that will produce prints with reduced flare and permits a better fit of the dynamic range of the original scene to the dynamic range of the medium.
    • 一种用于选择具有预定最大密度的期望介质的目标曲线的方法,包括从具有比预期介质的预定最大密度低的不同介质的目标曲线族选择目标曲线,目标曲线具有阴影 ,中音和高光区域; 改变所选目标曲线的阴影区域中的阴影对比度,以产生不同的目标曲线; 并且使用具有改善的阴影对比度的期望介质来确定不同的目标曲线,该对比度将产生具有减少的耀斑的打印,并且允许将原始场景的动态范围更好地拟合到介质的动态范围。
    • 9. 发明授权
    • Transforms for digital images in linear form
    • 以线性形式转换数字图像
    • US6072605A
    • 2000-06-06
    • US990067
    • 1997-12-12
    • Paul B. GilmanHarry D. FranchinoStephen A. NobleJohn F. Hamilton
    • Paul B. GilmanHarry D. FranchinoStephen A. NobleJohn F. Hamilton
    • G06F3/12G06T5/00G09G3/20H04N1/407H04N5/76H04N5/91G03F3/10H04N5/225
    • H04N1/4072
    • A method which substantially maintains the exposure latitude contained in one or more digital images captured in linear form and which uses an output device with a predetermined aim curve for producing visual images from such digital image includes the steps of selecting a particular reference portion of the scene corresponding to the digital image and adjusting the code value of such reference portion to a code value corresponding to a desired density and which corresponds to a point on the aim curve and changing the remaining code values of the digital image based upon the selected code value of the point on the aim curve so that a new digital image in linear form is produced; transforming the new digital image to form a third digital image which has code values based on the aim curve; and producing visual images by the output device in response to the transformed third digital image.
    • 一种基本保持包含在以线性形式捕获的一个或多个数字图像中的曝光宽容度的方法,并且使用具有预定目标曲线的输出装置从该数字图像产生视觉图像的方法包括以下步骤:选择场景的特定参考部分 对应于数字图像,并将这种参考部分的代码值调整为对应于期望密度并对应于目标曲线上的点的代码值,并且基于所选择的代码值来改变数字图像的剩余代码值 目标曲线上的点,使得生成线性形式的新数字图像; 转换新的数字图像以形成基于目标曲线的具有代码值的第三数字图像; 以及响应于变换的第三数字图像,由输出装置产生视觉图像。