Method and apparatus for performing local color correction
    1.
    发明授权
    Method and apparatus for performing local color correction 失效
    用于执行局部色彩校正的方法和装置

    公开(公告)号:US06813041B1

    公开(公告)日:2004-11-02

    申请号:US09540162

    申请日:2000-03-31

    IPC分类号: H04N160

    CPC分类号: G06T5/20

    摘要: The invention is directed towards method and apparatus for performing local color correction. One embodiment of the invention is a two-part process. The first part derives an image mask from an input image. In some embodiments, the mask is an inverted, low-pass filtered, monochrome version of the input image. The second part combines the derived mask with the input image through a non-linear operation. In some embodiments, the combination operation is a variable exponential function that has the mask values as part of its exponent and the pixel values as part of its base.

    摘要翻译: 本发明涉及用于执行局部色彩校正的方法和装置。 本发明的一个实施方案是两部分方法。 第一部分从输入图像中导出图像掩码。 在一些实施例中,掩模是输入图像的倒置,低通滤波的单色版本。 第二部分通过非线性操作将导出的掩模与输入图像相结合。 在一些实施例中,组合操作是具有作为其指数的一部分的掩码值和作为其基础的一部分的像素值的可变指数函数。

    Space varying gamut mapping
    2.
    发明授权
    Space varying gamut mapping 失效
    空间变化色域映射

    公开(公告)号:US06882449B2

    公开(公告)日:2005-04-19

    申请号:US09882038

    申请日:2001-06-18

    IPC分类号: B41J2/52 H04N1/46 H04N1/60

    CPC分类号: H04N1/6058

    摘要: A method an apparatus uses a variational approach for space dependent gamut mapping. The method presents a new measure for the problem. A solution to the formulation according to the method is unique if the gamut of the target device is known. A quadratic programming efficient numerical solution provides real-time results.

    摘要翻译: 一种装置使用变分方法进行空间依赖色域映射的方法。 该方法为问题提出了新的措施。 如果目标设备的色域是已知的,则根据该方法的配方的解决方案是独特的。 二次规划有效数值解决方案提供实时的结果。

    Method and system for providing extensive coverage of an object using virtual cameras
    3.
    发明申请
    Method and system for providing extensive coverage of an object using virtual cameras 审中-公开
    使用虚拟相机提供对物体的广泛覆盖的方法和系统

    公开(公告)号:US20060028476A1

    公开(公告)日:2006-02-09

    申请号:US10911463

    申请日:2004-08-03

    申请人: Irwin Sobel

    发明人: Irwin Sobel

    IPC分类号: G06T15/70 G06T13/00

    CPC分类号: G06T13/00

    摘要: A system and method for generating texture information. Specifically, a method provides for extensive coverage of an object using virtual cameras. The method begins by tracking a moveable object in a reference coordinate system. By tracking the moveable object, an object based coordinate system that is tied to the object can be determined. The method continues by collecting at least one replacement image from at least one video sequence of the object to form a subset of replacement images of the object. The video sequence of the object is acquired from at least one reference viewpoint, wherein the reference viewpoint is fixed in the reference coordinate system but moves around the object in the object based coordinate system. The subset of replacement images is stored for subsequent incorporation into a rendered view of the object.

    摘要翻译: 一种用于生成纹理信息的系统和方法。 具体地说,一种方法提供了使用虚拟相机广泛覆盖对象的方法。 该方法通过跟踪参考坐标系中的可移动对象开始。 通过跟踪可移动对象,可以确定绑定到对象的基于对象的坐标系。 该方法通过从对象的至少一个视频序列收集至少一个替换图像来继续以形成对象的替换图像的子集。 从至少一个参考视点获取对象的视频序列,其中参考视点固定在参考坐标系中,但是在基于对象的坐标系中围绕对象移动。 存储替换图像的子集以便随后并入到对象的呈现视图中。

    Local color correction
    4.
    发明授权
    Local color correction 失效
    局部颜色校正

    公开(公告)号:US06822762B2

    公开(公告)日:2004-11-23

    申请号:US10136966

    申请日:2002-05-02

    IPC分类号: H04N160

    CPC分类号: H04N1/407 G06T5/20

    摘要: An input image represented by a set of input pixel values is color-corrected by locally modifying the input pixel values according to pixel neighborhoods; and determining an output image having a set of output pixel values. Each set of output pixel values equals a non-linear combination of a set of input pixel values and its corresponding set of modified pixel values.

    摘要翻译: 由一组输入像素值表示的输入图像通过根据像素邻域局部修改输入像素值进行颜色校正; 以及确定具有一组输出像素值的输出图像。 每组输出像素值等于一组输入像素值和其对应的修改像素值集合的非线性组合。

    Inking system including reusable paper and water-humectant ink
    5.
    发明授权
    Inking system including reusable paper and water-humectant ink 失效
    包括可重复使用的纸张和水分润湿油墨的调色系统

    公开(公告)号:US06318265B1

    公开(公告)日:2001-11-20

    申请号:US09493515

    申请日:2000-01-28

    IPC分类号: C09D1110

    CPC分类号: B41M3/005 B41M7/0027

    摘要: A special ink consists of water and a humectant. A reusable paper includes a surface darkened by a water-insoluble material and a coating covering the darkened surface. The coating is made of a material that scatters light when dry and that becomes at least translucent when wetted by water. If the special ink is used to print on the reusable paper, the print will be visible for a limited period of time (e.g., half an hour). By the end of that time period, however, the special ink will have evaporated and the print will have disappeared completely from the reusable paper. The special ink may be applied to the reusable paper by an inkjet printer. An inkjet cartridge for such a printer includes a casing filled with the special ink.

    摘要翻译: 特殊墨水由水和湿润剂组成。 可重复使用的纸包括由水不溶性材料变暗的表面和覆盖变暗表面的涂层。 涂层由干燥时散射光的材料制成,并且在被水润湿时变得至少半透明。 如果特殊墨水用于在可重复使用的纸上打印,打印将在一段有限的时间内(例如半小时)内可见。 然而,到那个时间段结束时,特殊墨水将会蒸发,印刷品将从可重复使用的纸张完全消失。 特殊墨水可以通过喷墨打印机施加到可重复使用的纸张上。 用于这种打印机的喷墨墨盒包括填充有特殊墨水的外壳。

    System and method for image enhancement, dynamic range compensation and illumination correction
    7.
    发明授权
    System and method for image enhancement, dynamic range compensation and illumination correction 失效
    用于图像增强,动态范围补偿和照明校正的系统和方法

    公开(公告)号:US06941028B2

    公开(公告)日:2005-09-06

    申请号:US09843834

    申请日:2001-04-30

    摘要: A system and a method solve the estimation problem of finding reflectance R and illumination L. The system and method to solve a functional of the unknown illumination L such that a minimum of the functional is assumed to yield a good estimate of the illumination L. Having a good estimate of the illumination L implies a good estimate of the reflectance R. The functional uses a variational framework to express requirements for the optimal solution. The requirements include: 1) that the illumination L is spatially smooth; 2) that the reflectance values are in the interval [0,1] —thus, when decomposing the image S, the solution should satisfy the constraint L>S; 3) that among all possible solutions, the estimate of the illumination L should be as close as possible to the image S, so that the contrast of the obtained R is maximal; and 4) that the reflectance R complies with typical natural image behavior (e.g., the reflectance is piece-wise smooth).

    摘要翻译: 一种系统和方法解决了找到反射率R和照明L的估计问题。解决未知照明L的功能的系统和方法,使得假定功能的最小值产生对照明L的良好估计。具有 对照明L的良好估计意味着对反射率R的良好估计。功能使用变分框架来表达对最优解的要求。 要求包括:1)照明L在空间上平滑; 2)反射率值在[0,1]之间,当分解图像S时,溶液应满足约束L> S; 3)在所有可能的解决方案中,照明L的估计应尽可能接近图像S,使得所获得的R的对比度最大; 和4)反射率R符合典型的自然图像行为(例如,反射率是分段平滑的)。

    Method and apparatus for filtering images having insufficient tonal precision
    8.
    发明授权
    Method and apparatus for filtering images having insufficient tonal precision 失效
    用于滤波色调精度不足的图像的方法和装置

    公开(公告)号:US06731822B1

    公开(公告)日:2004-05-04

    申请号:US09429245

    申请日:1999-10-28

    IPC分类号: G06T500

    CPC分类号: G06T5/002 G06T2207/20016

    摘要: An array of n-bit words representing an image is filtered to produce a corresponding array of higher precision m-bit words representing the image. During the filtering, upper and lower bounds for the m-bit words are identified, and values for the m-bit words are selected between the upper and lower bounds. There is at least some spatial smoothness between the selected values. For example, the values may be selected at sample points of a curve or surface between the upper and lower bounds.

    摘要翻译: 表示图像的n位字的阵列被过滤以产生表示图像的较高精度m位字的相应阵列。 在过滤期间,识别m位字的上限和下限,并且在上限和下限之间选择m位字的值。 所选值之间至少有一些空间平滑度。 例如,可以在上限和下限之间的曲线或表面的采样点处选择值。

    Ink relocation for color halftones
    10.
    发明授权
    Ink relocation for color halftones 失效
    彩色墨水的墨水搬迁

    公开(公告)号:US5991512A

    公开(公告)日:1999-11-23

    申请号:US904026

    申请日:1997-07-31

    CPC分类号: H04N1/58

    摘要: Current methodologies for color image halftoning produce prominent halftoning noise. Brightness variations between color dots placed at neighboring locations are a primary cause of color halftone noise. To correct this flaw, an Ink Relocation Postprocess to halftoning algorithms relocates ink drops between neighboring drop locations in order to reduce local brightness variations. Due to the intrinsic blurring side-effect of ink relocation, some enhancement may be desired. Two application-specific enhancement procedures are presented. In the first enhancement, ink relocation is suppressed in areas of fine detail. In the second enhancement, edge sharpening is performed after ink relocation.

    摘要翻译: 彩色图像半色调的当前方法产生突出的半色调噪声。 放置在相邻位置的色点之间的亮度变化是颜色半色调噪声的主要原因。 为了纠正这个缺陷,墨水重新布置后处理到半色调算法重新定位相邻墨滴位置之间的墨滴,以减少局部亮度变化。 由于油墨重新定位的固有的模糊副作用,可能需要一些增强。 介绍了两个应用特定的增强过程。 在第一个增强中,在精细细节的区域中抑制了油墨重新定位。 在第二次增强中,在油墨重新定位之后执行边缘锐化。