公开(公告)号：US5539540A

公开(公告)日：1996-07-23

申请号：US305861

申请日：1994-09-13

Applicant: Kevin E. Spaulding ,  Ron Gershon ,  James R. Sullivan ,  Richard N. Ellson

Inventor： Kevin E. Spaulding ,  Ron Gershon ,  James R. Sullivan ,  Richard N. Ellson

IPC: G03F3/08 ,  G06T1/00 ,  H04N1/46 ,  H04N1/60

CPC classification number: H04N1/6058

Abstract: This invention provides a method for mapping an input color space to an output color space in such a way that the color reproduction characteristics of the saturated colors can be adjusted in a custom manner, while maintaining the desired tone reproduction on the neutral axis. This is accomplished by defining independently a tone transformation and a transformation for a plurality of highly saturated colors. A transformation is formed for the remaining color values having the specified transforms for the neutral and saturated colors as boundary values. In the preferred embodiment multi-dimensional look-up tables are used to implement the transform.

Abstract translation: 本发明提供了一种用于将输入颜色空间映射到输出颜色空间的方法，使得可以以定制的方式调整饱和色的颜色再现特性，同时保持中性轴上所需的色调再现。 这通过独立地定义多个高度饱和的颜色的色调变换和变换来实现。 形成具有用于中性和饱和颜色的指定变换的剩余颜色值作为边界值的变换。 在优选实施例中，使用多维查找表来实现变换。

公开(公告)号：US5377025A

公开(公告)日：1994-12-27

申请号：US980860

申请日：1992-11-24

Applicant: Kevin E. Spaulding ,  Lawrence A. Ray ,  James R. Sullivan

Inventor： Kevin E. Spaulding ,  Lawrence A. Ray ,  James R. Sullivan

IPC: H04N1/60 ,  H04N1/46

CPC classification number: H04N1/60 ,  H04N1/6019

Abstract: This invention minimizes the color errors associated with performing conversion and/or correction of color digital image data using multi-dimensional look-up tables of a limited size. By distributing the errors across the color gamut it is possible to reduce the average color error as well as the maximum color errors associated with linear or conventional linear or nonlinear, e.g. cube-root or logarithmic, remapping schemes. The resulting advantage will be color images with greatly reduced artifacts.

Abstract translation: 本发明使用有限尺寸的多维查找表来最小化与执行彩色数字图像数据的转换和/或校正相关联的颜色误差。 通过在色域上分布错误，可以减少与线性或常规线性或非线性相关联的平均颜色误差以及最大色差。 立方根或对数，重映射方案。 所产生的优点将是具有大大减少的伪影的彩色图像。

公开(公告)号：US5604610A

公开(公告)日：1997-02-18

申请号：US333828

申请日：1994-11-03

Applicant: Kevin E. Spaulding ,  James R. Sullivan

Inventor： Kevin E. Spaulding ,  James R. Sullivan

IPC: H04N1/60 ,  H04N1/46 ,  G03F3/08

CPC classification number: H04N1/6027 ,  H04N1/60 ,  H04N1/6019

Abstract: A method for transforming input color values of a digital image to produce suitable output color values for use by a particular device is disclosed. In this method a plurality of color transforms are stored, each such transform responds to input color values of a digital image and produces output color values which can be used by the particular device. In the method an intermediate transform which is user desirable for transforming the input color values is formed by interpolating between the plurality of transforms.

Abstract translation: 公开了一种用于变换数字图像的输入颜色值以产生由特定装置使用的合适的输出颜色值的方法。 在该方法中，存储多个颜色变换，每个这样的变换对数字图像的输入颜色值进行响应，并产生特定装置可以使用的输出颜色值。 在该方法中，通过在多个变换之间进行内插来形成用户希望用于变换输入颜色值的中间变换。

公开(公告)号：US06269184B1

公开(公告)日：2001-07-31

申请号：US08866469

申请日：1997-05-30

Applicant: Kevin Edward Spaulding ,  Ron Gershon ,  Richard N. Ellson ,  James R. Sullivan

Inventor： Kevin Edward Spaulding ,  Ron Gershon ,  Richard N. Ellson ,  James R. Sullivan

IPC: G06K900

CPC classification number: H04N1/622

Abstract: A method and apparatus for mapping a first color space into a second color space which allows a user to specify or constrain the mapping for a subset of the points within the first color space and determine the remaining unconstrained points according to a preexisting or default mapping.

Abstract translation: 一种用于将第一颜色空间映射到第二颜色空间的方法和装置，其允许用户指定或约束第一颜色空间内的点的子集的映射，并且根据预先存在的或默认的映射来确定剩余的非约束点。

公开(公告)号：US4920501A

公开(公告)日：1990-04-24

申请号：US259940

申请日：1988-10-19

Applicant: James R. Sullivan ,  Rodney L. Miller

Inventor： James R. Sullivan ,  Rodney L. Miller

IPC: H04N1/405

CPC classification number: H04N1/4051

Abstract: A digital halftone image is produced by providing a binary bit image pattern having a minimum visual noise for each density level in an image. The patterns are produced by employing a stochastic combinatorial minimization technique and a human visual system modulation transfer function (MTF) weighting function to generate a halftone pattern for each density level of the multi-level digital image signal. A halftone image is produced by modularly addressing these patterns with each pixel value in the image.

Abstract translation: 通过为图像中的每个密度级提供具有最小视觉噪声的二进制位图像图案来产生数字半色调图像。 通过采用随机组合最小化技术和人类视觉系统调制传递函数（MTF）加权函数来产生图案，以产生多级数字图像信号的每个密度级的半色调图案。 通过以图像中的每个像素值模块化地寻址这些图案来产生半色调图像。

公开(公告)号：US5708511A

公开(公告)日：1998-01-13

申请号：US734551

申请日：1996-10-17

Applicant: Bhavan R. Gandhi ,  Craig Michael Smith ,  James R. Sullivan ,  Douglas W. Couwenhoven ,  Gregory Rombola

Inventor： Bhavan R. Gandhi ,  Craig Michael Smith ,  James R. Sullivan ,  Douglas W. Couwenhoven ,  Gregory Rombola

IPC: H03M7/38 ,  H04N1/41 ,  H04N1/417 ,  H04N7/26 ,  H04N7/32 ,  H04N7/34 ,  H04N1/415

CPC classification number: H04N19/12 ,  H04N19/50 ,  H04N19/593 ,  H04N19/30

Abstract: A block adaptive differential pulse code modulation (DPCM) system includes both a lossless DPCM processor responsive to blocks of pixel values for producing encoder command signals and a lossy DPCM compressor responsive to blocks of pixel values for producing encoder command signals. An encoder receives the encoder command signals from the lossless DPCM processor and lossy DPCM compressor and produces a compressed encoded bit stream. A switch responsive to a compression configuration signal and to the encoder command signals from the lossy compressor selectively passes the encoder command signals from the lossless processor or the lossy compressor to the encoder.

Abstract translation: 块自适应差分脉码调制（DPCM）系统包括响应于用于产生编码器命令信号的像素值块的无损DPCM处理器和响应于用于产生编码器命令信号的像素值块的有损DPCM压缩器。 编码器从无损DPCM处理器和有损DPCM压缩器接收编码器命令信号，并产生压缩的编码比特流。 响应于压缩配置信号和来自有损压缩器的编码器命令信号的开关选择性地将编码器命令信号从无损处理器或有损压缩器传递到编码器。

公开(公告)号：US5625378A

公开(公告)日：1997-04-29

申请号：US68823

申请日：1993-05-28

Applicant: Shijie J. Wan ,  Rodney L. Miller ,  James R. Sullivan

Inventor： Shijie J. Wan ,  Rodney L. Miller ,  James R. Sullivan

IPC: G06T1/00 ,  G06T5/00 ,  H04N1/46 ,  H04N1/60 ,  G09G5/02

CPC classification number: H04N1/6058 ,  H04N1/6019

Abstract: A convex interpolation apparatus and method to map source color signals in a n-dimensional color space to target color signals in a m-dimensional color space includes finding a set of sample signals in the source color space whose convex hull encloses the given signal; determining the coefficients needed to express the given signal as a convex combination of the set of sample signals; and interpolating the source signal to obtain a target signal in the target color space by using the coefficients and the sample signals is the target color space that correspond to the sample signals selected in the source color space. The sample signals in both color spaces can be lattice points or non-lattice points. A method and apparatus are also provided which can not only determine if a point is enclosed by a convex hull of a set of points in a n-dimensional space, but also simultaneously derive the coefficients needed to express the given point as a convex combination of the set of points.

Abstract translation: 一种用于将n维色彩空间中的源色彩信号映射到m维色彩空间中的目标色彩信号的凸插入装置和方法包括：在其外壳中包含给定信号的源颜色空间中找到一组采样信号; 确定将所述给定信号表示为所述采样信号集合的凸组合所需的系数; 并且通过使用系数来内插源信号以获得目标色彩空间中的目标信号，并且采样信号是与在源色彩空间中选择的采样信号相对应的目标色彩空间。 两个颜色空间中的采样信号可以是格点或非格点。 还提供了一种方法和装置，其不仅可以确定一个点是否被n维空间中的一组点的凸包围住，而且还同时导出将给定点表示为凸组合所需的系数 一组点数。

公开(公告)号：US5731818A

公开(公告)日：1998-03-24

申请号：US610779

申请日：1996-03-04

Applicant: Shijie Wan ,  James R. Sullivan

Inventor： Shijie Wan ,  James R. Sullivan

IPC: H04N9/79 ,  H04N1/46 ,  H04N1/60 ,  G06T11/40

CPC classification number: H04N1/6058

Abstract: An efficient method for gamut clipping based on user-defined constraints on lightness and hue by: a) defining a color gamut surface of an output device using a gamut descriptor; b) specifying a search range based on maximum tolerances for lightness and hue changes; and, c) for each input color data point outside the gamut, mapping the data point to the closest point in a portion of the gamut surface specified by the search range.

Abstract translation: 基于用户对亮度和色调的限制的色域限幅的有效方法是：a）使用色域描述符定义输出设备的色域表面; b）根据亮度和色相变化的最大公差指定搜索范围; 并且c）对于色域外部的每个输入颜色数据点，将数据点映射到由搜索范围指定的色域表面的一部分中的最近点。

公开(公告)号：US5583656A

公开(公告)日：1996-12-10

申请号：US999631

申请日：1992-12-31

Applicant: Bhavan R. Gandhi ,  James R. Sullivan

Inventor： Bhavan R. Gandhi ,  James R. Sullivan

IPC: H03M7/30 ,  G06T1/20 ,  G06T5/00 ,  G06T9/00 ,  H04N1/46 ,  H04N1/60 ,  G02B23/08 ,  G02B23/00 ,  G03B21/56

CPC classification number: G06T9/00

Abstract: Each member of a set of transform representative data structures (such as look-up tables (LUTs), each representing an N TO M-dimensional transform), is stored in compressed form in a storage device included in, or which is otherwise accessible to, an image processing device or system. Each stored transform representative data structure may then, according to one embodiment of the invention, be selectively attached to image data being processed by the image processing device or system. According to a further aspect of the invention, image data, having compressed transform representative data attached thereto, may be processed utilizing methods and apparatus operative to detach, decompress and apply the transform represented by the decompressed transform representative data, to a decompressed version of the image data. The result of the aforementioned process is for image data to be transformed according to a transform specified by information previously attached to the image data.

Abstract translation: 一组变换代表数据结构（诸如查找表（LUT），每个代表N TO M维度变换）的每个成员以压缩形式存储在包括在其中的存储设备中，或者以其他方式可访问 ，图像处理装置或系统。 然后，根据本发明的一个实施例，每个存储的变换代表数据结构可以选择性地附加到由图像处理设备或系统正在处理的图像数据。 根据本发明的另一方面，可以利用附加到其上的压缩变换代表数据的图像数据，使用可解压缩和解压缩并将由解压缩变换代表数据表示的变换应用于解压缩版本的方法和装置 图像数据。 上述处理的结果是根据由先前附加到图像数据的信息指定的变换来变换图像数据。

公开(公告)号：US4918633A

公开(公告)日：1990-04-17

申请号：US171630

申请日：1988-03-22

Applicant: James R. Sullivan

Inventor： James R. Sullivan

IPC: G06K9/40 ,  G06T5/00

CPC classification number: G06K9/40 ,  G06T5/002 ,  G06T5/10 ,  G06T2207/20076 ,  G06T2207/20204

Abstract: A method for reducing noise in an image signal includes the steps of sampling an image to produce a sampled image signal representing pixel amplitude values, the sampled image signal including noise having a known probabilty density function (pdf); digitizing the pixel amplitude values to produce a digital image; forming an image difference signal from the digital image signal by taking the difference between successive pixel amplitude values; processing the image difference signal in digital processing means including a digital MAP filter incorporating a MAP estimator for estimating the signal and noise pdf's of a signal having a Laplacian pdf degraded by noise having a know pdf, to produce a MAP filtered image difference signal; and recovering a restored digital image signal from the MAP filtered image difference signal by summing successive amplitude difference values in the MAP filtered image difference signal. Since the pdf of the differential image signal is more nearly stationary than the image signal itself, a MAP estimator based on a differential image signal provides a more reliable estimate of the original signal statistics, even though the statistics of original signal may vary widely.

Abstract translation: 降低图像信号噪声的方法包括对图像进行采样以产生表示像素幅度值的采样图像信号的步骤，该采样图像信号包括具有已知概率密度函数（pdf）的噪声; 数字化像素幅度值以产生数字图像; 通过取连续的像素幅度值之间的差异，从数字图像信号形成图像差分信号; 在数字处理装置中处理图像差分信号，包括包含MAP估计器的数字MAP滤波器，用于估计具有由具有知识pdf的噪声降级的拉普拉斯算子的信号的信号和噪声pdf，以产生MAP滤波图像差分信号; 以及通过对MAP滤波图像差分信号中的连续振幅差值求和来从MAP滤波图像差分信号中恢复恢复的数字图像信号。 由于差分图像信号的pdf比图像信号本身更接近静止，所以即使原始信号的统计信号可能变化很大，基于差分图像信号的MAP估计器提供了对原始信号统计的更可靠的估计。