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公开(公告)号：US08564840B2
公开(公告)日：2013-10-22
申请号：US12789512
申请日：2010-05-28
申请人： Robert Paul Loce , Edgar A. Bernal
发明人： Robert Paul Loce , Edgar A. Bernal
IPC分类号： H04N1/405
CPC分类号： H04N1/4058 , H04N1/4055
摘要： An aspect of the present disclosure provides a halftoning method for annular rasters comprising: using annular rasters with uniformly spaced raster lines and uniformly spaced pixels within the raster lines; angularly tiling wedge shaped halftone cells around at least a partial circumferential print medium wherein an integer number of wedge tiles fills a disc space; wherein the annular rasters are considered in arcs and wherein pixel thresholds in the wedge shaped halftone cells are considered in arcs so as to conform to the annular rasters upon tiling the wedge shaped halftone cells; and, setting the number of pixel thresholds in each arc raster of the cell to an integer value near a desired writing resolution to enable seamless tiling wherein the number of thresholds increase as a function of a wedge cell radius.
摘要翻译： 本公开的一个方面提供了一种用于环形光栅的半色调方法，包括：使用具有均匀间隔的光栅线和在光栅线内均匀间隔的像素的环形光栅; 围绕至少部分圆周打印介质的楔形半球形细胞成角度地平铺，其中整数数目的楔块填充盘片空间; 其中所述环形光栅被认为是弧形的，并且其中所述楔形半色调细胞中的像素阈值被认为是弧形的，以便在平铺所述楔形半色调细胞时符合所述环形光栅; 以及将所述单元的每个弧光栅中的像素阈值的数量设置为接近所需书写分辨率的整数值，以实现无缝拼接，其中所述阈值的数量作为楔形单元半径的函数而增加。
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公开(公告)号：US08432582B2
公开(公告)日：2013-04-30
申请号：US10923116
申请日：2004-08-20
申请人： Yeqing Zhang , Robert Paul Loce , Beilei Xu
发明人： Yeqing Zhang , Robert Paul Loce , Beilei Xu
CPC分类号： H04N1/603
摘要： Compensation for rendering device non-uniformities is provided for halftoned images. A spatially dependent tone reproduction curve (TRC) provides compensation values. Pixel location information is used to access TRC values. For example, the values are modification values. The modification values are added to the pixel values to generate combined values. Quantization is applied to the combined values to prepare compensated image data for rendering. For example, Rank Ordered Error Diffusion is applied to the combined values. The combined values may include diffused error from previously processed pixels. Gray values may be estimated for the respective pixels. The estimated gray values may be used to access compensation information from a TRC that is both spatially and gray value dependent. Mathematical basis decomposition is used to reduce TRC memory requirements. For example, Discrete Cosine Transformation, Singular Value Decomposition or Principal Component Analysis is used to determine a compact form for the TRC.
摘要翻译： 为半色调图像提供渲染设备不均匀性的补偿。 空间依赖色调再现曲线（TRC）提供补偿值。 像素位置信息用于访问TRC值。 例如，值是修改值。 将修改值添加到像素值以生成组合值。 将量化应用于组合值以准备用于渲染的补偿图像数据。 例如，将秩排序误差扩散应用于组合值。 组合的值可以包括来自先前处理的像素的扩散误差。 可以针对各个像素估计灰度值。 估计的灰度值可用于从空间和灰度依赖的TRC访问补偿信息。 数学基础分解用于减少TRC记忆体要求。 例如，使用离散余弦变换，奇异值分解或主成分分析来确定TRC的紧凑形式。
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公开(公告)号：US07894107B2
公开(公告)日：2011-02-22
申请号：US11796397
申请日：2007-04-27
申请人： Anthony Ang , Robert Paul Loce , Beilei Xu , Robert Kleckner
发明人： Anthony Ang , Robert Paul Loce , Beilei Xu , Robert Kleckner
IPC分类号： H04N1/04
CPC分类号： H04N1/40031
摘要： An optical scanning device is provided which comprises a laser array which emits laser beams including a number of beams (1, 2, . . . , n) writing a swath of rasters having a laser scanning section which, when an interlaced scanning period i, is set to a natural number between beams which are adjacent in a sub-scanning direction, scans the laser beams emitted from the laser array with the interlaced scanning period i. The laser scanning section can scan the laser beams such that the beam number n and the interlaced scanning period i are relatively prime natural numbers, and n>i. In a first scan, data for raster lines (1, 2, . . . , n) can be selectively associated with a respective first exposure. At a second scan, data for raster lines (i+1, i+2, . . . , n) can be selectively associated with a respective second exposure and data for raster lines (n+1, n+2, . . . , n+i) can be selectively associated with a respective first exposure. The first respective exposure for raster lines (i+1, i+2, . . . , n) is not equal to the respective second exposure for raster lines (i+1, i+2, . . . , n).
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4.发明授权Systems and methods for controlling a tone reproduction curve using error diffusion 有权使用误差扩散来控制色调再现曲线的系统和方法公开(公告)号：US07440139B2
公开(公告)日：2008-10-21
申请号：US11034057
申请日：2005-01-13
CPC分类号： H04N1/407 , H04N1/40068 , H04N1/4052
摘要： A method of adjusting a TRC of an image is provided. The method involves receiving an image at an input resolution, resampling the image to a processing resolution if the imput resolution and the processing resolution are not same, processing the image using rank-ordered error diffusion, and resampling the processed image to a desired output resolution for the image if the processing resolution and the output resolution are not same.
摘要翻译： 提供了一种调整图像的TRC的方法。 该方法包括以输入分辨率接收图像，如果输入分辨率和处理分辨率不相同，则将图像重新采样到处理分辨率，使用等级错误扩散处理图像，并将处理的图像重新采样到期望的输出分辨率 对于图像，如果处理分辨率和输出分辨率不相同。
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5.发明授权PDL operator overloading for line width management of lines that intersect filled objects 有权对于与填充对象相交的行的线宽管理，PDL运算符重载公开(公告)号：US06259821B1
公开(公告)日：2001-07-10
申请号：US09179419
申请日：1998-10-27
IPC分类号： G06F1750
CPC分类号： G06T11/60
摘要： A method and apparatus for overloading operators in Page Description Language (PDL) defined graphics redefines the graphic, such as to compensate for certain undesirable line growth characteristics of a target printer or display device. Line width can be controlled based on various attributes, such as color, size, or width. Additionally, the method and apparatus determine whether a line of an object of the graphic intersects with or completely overlays another object. If it does, only those overlying portions are redefined. A line of the graphic can be redefined to be wider, narrower or of a differing color to achieve a desired printed graphic. Also, the method and apparatus can compensate for fill in of reverse-line and “cookie-cutter” holes. The method, performed within a decomposer, examines individual lines of a PDL defined graphic, determines if compensation is needed to achieve a desired printed output, and redefines an operator to achieve the compensation. The method also determines whether the line intersects with or completely overlays another object of the graphic.
摘要翻译： 用于在页面描述语言（PDL）定义的图形中重载操作符的方法和装置重新定义图形，以补偿目标打印机或显示设备的某些不期望的行增长特性。 可以根据各种属性（如颜色，大小或宽度）来控制线条宽度。 此外，方法和装置确定图形的对象的一行是否与另一对象相交或完全覆盖。 如果是这样，只有那些重叠的部分被重新定义。 图形的一行可以重新定义为更宽，更窄或不同的颜色，以实现所需的打印图形。 此外，该方法和装置可以补偿反向线和“饼干”孔的填充。 在分解器中执行的方法检查PDL定义图形的各行，确定是否需要补偿来实现所需的打印输出，并重新定义操作者以实现补偿。 该方法还确定线是否与图形的另一对象相交或完全覆盖。
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公开(公告)号：US08368964B2
公开(公告)日：2013-02-05
申请号：US12536967
申请日：2009-08-06
申请人： Beilei Xu , Robert Paul Loce , Chu-Heng Liu , Ying-wei Lin
发明人： Beilei Xu , Robert Paul Loce , Chu-Heng Liu , Ying-wei Lin
IPC分类号： H04N1/40
CPC分类号： H04N1/387 , G06T5/003 , G06T5/50 , G06T2207/10008 , G06T2207/10148 , G06T2207/30176
摘要： A method for determining local defocus distance in a scanned image of a non-planar original object is provided comprising scanning at least a portion of the non-planar original object to produce first scanned image data at a first focal plane and scanning same the at least a portion of the non-planar original object to produce at least second scanned image data at a second focal plane. The first scanned image data is different from the second scanned image data wherein a distance between the first focal plane and the second focal plane is a predetermined quantity. The method further comprises estimating an out-of-focus distance of the object from the first and the second scanned image data.
摘要翻译： 提供了一种用于确定非平面原始对象的扫描图像中的局部散焦距离的方法，包括扫描非平面原始对象的至少一部分以在第一焦平面处产生第一扫描图像数据，并至少扫描至少 所述非平面原始对象的一部分在第二焦平面处产生至少第二扫描图像数据。 第一扫描图像数据与第二扫描图像数据不同，其中第一焦平面和第二焦平面之间的距离是预定量。 该方法还包括估计物体与第一和第二扫描图像数据的离焦距离。
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公开(公告)号：US08335387B2
公开(公告)日：2012-12-18
申请号：US12248217
申请日：2008-10-09
申请人： Edgar Bernal , Robert Paul Loce , Josephine Smith
发明人： Edgar Bernal , Robert Paul Loce , Josephine Smith
摘要： In accordance with the present disclosure, there is provided a method for performing streak compensation on compressed digital image data. The method comprises generating the compressed digital image data using a compression method employing a discrete cosine transform (DCT) and recovering a zero frequency component (DC coefficient) of the discrete cosine transform (DCT) for each of a plurality of compressed unit blocks of image data wherein each unit block includes N pixel columns. The method further comprises applying spatially varying compensating tone reproduction curves (TRC) to the DC coefficients of each of the plurality of unit blocks on a block-column basis wherein each block-column receives compensation from a given TRC, re-compressing the compensated image data, and subsequently decompressing all of the compensated units to produce decompressed compensated image data.
摘要翻译： 根据本公开，提供了一种用于对压缩数字图像数据进行条纹补偿的方法。 该方法包括使用采用离散余弦变换（DCT）的压缩方法生成压缩的数字图像数据，并为多个压缩单位图像块中的每一个恢复离散余弦变换（DCT）的零频率分量（DC系数） 数据，其中每个单位块包括N个像素列。 该方法还包括在块列基础上对空间变化的补偿色调再现曲线（TRC）应用于多个单位块中的每一个的DC系数，其中每个块列从给定的TRC接收补偿，重新压缩补偿的图像 数据，随后解压缩所有经补偿的单元以产生解压缩的补偿图像数据。
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公开(公告)号：US07852536B2
公开(公告)日：2010-12-14
申请号：US11108497
申请日：2005-04-18
申请人： Shen-ge Wang , Beilei Xu , Robert Paul Loce
发明人： Shen-ge Wang , Beilei Xu , Robert Paul Loce
IPC分类号： H04N1/46
摘要： A method for avoiding objectionable moiré in a color image can include identifying a problematic excitation angle associated with a problematic excitation in a marking process or in the color image and selecting a set of at least two halftone screens for rendering at least two separations of the color image wherein the set of screens is selected to avoid including significant screen fundamental, harmonic and beat frequencies at angles closer than about 1 degree of the identified problematic excitation angle. Halftoning the color image according to the selected set of screens avoids objectionable moiré associated with the problematic excitation.
摘要翻译： 用于避免彩色图像中的令人反感的莫尔条纹的方法可以包括识别与标记过程或彩色图像中的有问题的激励相关联的有问题的激发角度，并且选择一组至少两个半色调屏幕，用于渲染颜色的至少两个分色 图像，其中所述屏幕组被选择以避免在所识别的有问题的激励角度的近似1度的角度包括显着的屏幕基本，谐波和拍频。 根据所选择的一组屏幕对色彩图像进行半色调，避免与有问题的激发相关的令人反感的莫尔。
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公开(公告)号：US20100092096A1
公开(公告)日：2010-04-15
申请号：US12248217
申请日：2008-10-09
申请人： Edgar Bernal , Robert Paul Loce , Josephine Smith
发明人： Edgar Bernal , Robert Paul Loce , Josephine Smith
IPC分类号： G06K9/36
摘要： In accordance with the present disclosure, there is provided a method for performing streak compensation on compressed digital image data. The method comprises generating the compressed digital image data using a compression method employing a discrete cosine transform (DCT) and recovering a zero frequency component (DC coefficient) of the discrete cosine transform (DCT) for each of a plurality of compressed unit blocks of image data wherein each unit block includes N pixel columns. The method further comprises applying spatially varying compensating tone reproduction curves (TRC) to the DC coefficients of each of the plurality of unit blocks on a block-column basis wherein each block-column receives compensation from a given TRC, re-compressing the compensated image data, and subsequently decompressing all of the compensated units to produce decompressed compensated image data.
摘要翻译： 根据本公开，提供了一种用于对压缩数字图像数据进行条纹补偿的方法。 该方法包括使用采用离散余弦变换（DCT）的压缩方法生成压缩的数字图像数据，并为多个压缩单位图像块中的每一个恢复离散余弦变换（DCT）的零频率分量（DC系数） 数据，其中每个单位块包括N个像素列。 该方法还包括在块列基础上对空间变化的补偿色调再现曲线（TRC）应用于多个单位块中的每一个的DC系数，其中每个块列从给定的TRC接收补偿，重新压缩补偿的图像 数据，随后解压缩所有经补偿的单元以产生解压缩的补偿图像数据。
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公开(公告)号：US06757449B1
公开(公告)日：2004-06-29
申请号：US09441520
申请日：1999-11-17
申请人： Robert Paul Loce
发明人： Robert Paul Loce
IPC分类号： G06K932
CPC分类号： G06T5/002 , G06T5/50 , G06T2200/12 , G06T2207/30176
摘要： The present invention discloses methods and apparatus for processing anti-aliased digital images. Specifically, the present invention describes methods and apparatus where anti-aliased images of a given pixel resolution are transformed to high resolution binary images, binary operations such as template matching are performed on the high resolution images, and then the high resolution images are transformed to anti-aliased images of a predetermined pixel resolution.
摘要翻译： 本发明公开了用于处理抗锯齿数字图像的方法和装置。 具体地，本发明描述了将给定像素分辨率的抗锯齿图像变换为高分辨率二进制图像的方法和装置，对高分辨率图像执行诸如模板匹配的二进制操作，然后将高分辨率图像转换为 具有预定像素分辨率的抗锯齿图像。
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