-
31.发明授权System and method for redistributing error values from an error diffusion process 失效从误差扩散过程重新分配误差值的系统和方法
公开(公告)号：US5696601A
公开(公告)日：1997-12-09
申请号：US285265
申请日：1994-08-03
CPC分类号： H04N1/4052
摘要： A method and system implements a redistributive characteristic into an error diffusion process. A grey level value representing a pixel is received. A threshold circuit thresholds the received grey level value and generates an error value as a result of the threshold. A portion of the error value is diffused to adjacent pixels on a next scanline. All the error for a single pixel on the next scanline is accumulated. Since this accumulated error has a greater number of bits than can be stored in a buffer, a portion of the accumulated error is truncated and redistributed to a down stream pixel for inclusion in the downstream pixel's error accumulation process. The grey level value has a first resolution which corresponds to an original input resolution. In a high addressabilty environment, the received grey level value is interpolated to subpixel grey level values before thresholding.
摘要翻译： 一种方法和系统在误差扩散过程中实现再分配特性。 接收表示像素的灰度值。 阈值电路对接收的灰度级值进行阈值，并作为阈值的结果生成错误值。 错误值的一部分扩散到下一个扫描线上的相邻像素。 累积下一个扫描线上单个像素的所有错误。 由于该累加误差具有比可以存储在缓冲器中更多的位数，所以累积误差的一部分被截断并重新分配给下行像素以包括在下游像素的误差累加处理中。 灰度值具有对应于原始输入分辨率的第一分辨率。 在高可寻址环境中，接收到的灰度值被内插到阈值处理之前的子像素灰度值。
-
32.发明授权Automatic image segmentation using local area maximum and minimum image signals 失效自动图像分割采用局部最大和最小图像信号
公开(公告)号：US5293430A
公开(公告)日：1994-03-08
申请号：US4479
申请日：1993-01-12
申请人： Jeng-Nan Shiau , Barbara L. Farrell
发明人： Jeng-Nan Shiau , Barbara L. Farrell
CPC分类号： H04N1/40062
摘要： Method and apparatus for processing image pixels to determine the presence of high frequency halftone images. Prior to auto correlation, each pixel in the image is examined to determine whether it is a local area maximum or minimum. A binary image function composed of the image local area maximum or minimums is made available for auto correlation. The presence of peaks at shifts indicative of predetermined halftone image frequencies is detected, and an output signal indicative of the presence or absence of peaks at the predetermined halftone image frequencies is provided. The arrangement is combined with a run length encoder to reduce false microdetection results.
摘要翻译： 用于处理图像像素以确定高频半色调图像的存在的方法和装置。 在自动相关之前，检查图像中的每个像素以确定它是局部区域的最大值还是最小值。 由图像局部最大或最小值组成的二进制图像功能可用于自动相关。 检测出表示预定半色调图像频率的偏移处的峰值的存在，并且提供指示在预定半色调图像频率处是否存在峰值的输出信号。 该装置与游程长度编码器相结合，以减少误检结果。
-
公开(公告)号：US5196942A
公开(公告)日：1993-03-23
申请号：US583337
申请日：1990-09-17
申请人： Jeng-Nan Shiau
发明人： Jeng-Nan Shiau
CPC分类号： H04N1/40087 , H04N1/4055
摘要： A method of reproducing gray levels on a device capable of displaying a limited number of gray levels. A system is disclosed for partitioning an image composed of pixels into halftone cells, each having multiple pixels. Each input pixel value within a halftone cell is translated into an output pixel value in accordance with a set of threshold arrays.
摘要翻译： 在能够显示有限数量的灰度级的装置上再现灰度级的方法。 公开了一种用于将由像素构成的图像分割成具有多个像素的半色调单元的系统。 根据一组阈值阵列将半色调单元内的每个输入像素值转换为输出像素值。
-
34.发明授权公开(公告)号：US07724955B2
公开(公告)日：2010-05-25
申请号：US11139541
申请日：2005-05-31
申请人： David Jon Metcalfe , Jeng-Nan Shiau
发明人： David Jon Metcalfe , Jeng-Nan Shiau
IPC分类号： G06K9/34
CPC分类号： G06K9/38 , G06K2209/01
摘要： Methods and apparatus for segmenting image data into windows and rendering a best-estimate outline delineating document windows may include adjusting a background white threshold differently than adjusting a white threshold normally used to classify pixels as white for video processing purposes. Such an independently arrived at threshold may be more suitable for the different task of differentiating between document background and document content.
摘要翻译： 将图像数据分割成窗口并渲染描绘文档窗口的最佳估计轮廓的方法和装置可以包括调整背景白色阈值，而不是调整通常用于将像素分类为白色的白色阈值用于视频处理目的。 这样独立地达到阈值可能更适合区分文档背景和文档内容的不同任务。
-
公开(公告)号：US07009739B1
公开(公告)日：2006-03-07
申请号：US09699820
申请日：2000-10-30
申请人： Ying-wei Lin , Jeng-nan Shiau
发明人： Ying-wei Lin , Jeng-nan Shiau
IPC分类号： H04N1/46
CPC分类号： H04N1/40012
摘要： A continuously variable screening tool is used to generate a unique texture pattern for every color in a multicolor image. The continuously variable screening tool allows a single colorant version of the image to be generated with less information loss than typically suffered in the multicolor to single color transformation process. The continuously variable screening tool is generated by blending patterns from a set of reference screens. The reference screens are associated with selected reference colors in, for example, a machine independent color space. A calculated screen is generated through a weighted blend of reference screens located near the arbitrary color in the machine independent color space. Typically, the weights depend on the distance the arbitrary color is from each of the reference colors. The screens consist of arrays of threshold values. Each threshold value is associated with a dot position and an image pixel. Where a pixel value exceeds the associated threshold value, provision is made to place a mark in the associated dot position. An image processor operative to carry out the method comprises a continuously variable screening tool generator. An embodiment of the image processor includes a reference screen storage device and a screen blender.
摘要翻译： 使用连续可变的筛选工具为多色图像中的每种颜色生成独特的纹理图案。 连续可变的筛选工具允许以多色到单色转换过程中通常遭受的信息损失较少的信息生成图像的单一着色剂版本。 通过混合来自一组参考屏幕的图案来生成连续可变的筛选工具。 参考屏幕与例如机器独立颜色空间中的所选参考颜色相关联。 通过在机器独立颜色空间中位于任意颜色附近的参考屏幕的加权混合来生成计算屏幕。 通常，权重取决于任意颜色与每个参考颜色的距离。 屏幕由阈值阵列组成。 每个阈值与点位置和图像像素相关联。 如果像素值超过关联的阈值，则提供在相关联的点位置放置标记。 可操作地执行该方法的图像处理器包括连续可变的筛选工具发生器。 图像处理器的实施例包括参考屏幕存储设备和屏幕搅拌器。
-
36.发明授权Methods and apparatus for modifying image data based on identification of marking process 失效基于识别标记过程修改图像数据的方法和装置公开(公告)号：US06525845B1
公开(公告)日：2003-02-25
申请号：US09234107
申请日：1999-01-19
申请人： Gaurav Sharma , Stuart A. Schweid , Jeng-Nan Shiau
发明人： Gaurav Sharma , Stuart A. Schweid , Jeng-Nan Shiau
IPC分类号： H04N146
CPC分类号： H04N1/00015 , H04N1/00002 , H04N1/00037 , H04N1/00087 , H04N1/2315 , H04N1/40062
摘要： Image information is re-calibrated based on the type of marking process and materials by which the image corresponding to the image information was marked on a substrate. The marking process is automatically detected by using, for example, at least one spatial characteristic obtained from the image information.
摘要翻译： 基于标记处理的类型和与图像信息对应的图像在基板上标记的材料重新校准图像信息。 通过使用例如从图像信息获得的至少一个空间特性来自动检测标记处理。
-
37.发明授权Method and system for processing image information using screening and error diffusion 失效使用筛选和误差扩散处理图像信息的方法和系统公开(公告)号：US06347159B1
公开(公告)日：2002-02-12
申请号：US08285328
申请日：1994-08-03
IPC分类号： G06K936
CPC分类号： H04N1/4053
摘要： A method and system implements screening and a high addressability characteristic into an error diffusion process. A grey level value representing a pixel is received. The grey level value has a first resolution which corresponds to an original input resolution. The grey level value is then screened. A threshold circuit thresholds the grey level value and generates an error value as a result of the threshold. A portion of the error value is diffused to adjacent pixels on a next scanline. The screened grey level value can also be interpolated to generate subpixel grey level values which correspond to a second resolution. The second resolution is higher than the first resolution and corresponds to the high addressability characteristic. The threshold circuit would then threshold the grey level value and generate an error value having a resolution corresponding to the first resolution.
摘要翻译： 一种方法和系统在误差扩散过程中实现筛选和高寻址特性。 接收表示像素的灰度值。 灰度值具有对应于原始输入分辨率的第一分辨率。 然后屏蔽灰度值。 阈值电路阈值灰度值，并产生作为阈值结果的误差值。 错误值的一部分扩散到下一个扫描线上的相邻像素。 所筛选的灰度值也可被内插以产生对应于第二分辨率的子像素灰度级值。 第二分辨率高于第一分辨率，并且对应于高寻址特性。 阈值电路然后阈值灰度值，并产生具有与第一分辨率对应的分辨率的误差值。
-
38.发明授权公开(公告)号：US06229923B1
公开(公告)日：2001-05-08
申请号：US09010025
申请日：1998-01-21
IPC分类号： G06K962
CPC分类号： G06K9/00456
摘要： A system and method classify a pixel of image data as one of a plurality of image types. A first image characteristic value for the pixel, a second image characteristic value for the pixel, a third image characteristic value for the pixel, and a fourth image characteristic for the pixel is determined. Some of these determinations may be resolution dependent. The values from these determination are utilized in assigning an image type classification to the pixel. Moreover, if at least one of the image characteristic values is greater than a predetermined threshold value the pixel is classified as a halftone peak value. The system includes a plurality of microclassifiers for determining a distinct image characteristic value of the pixel; a plurality of macroreduction circuits connected to the plurality of microclassifiers for performing further higher level operations upon the distinct image characteristic values of the pixel to produce reduced values; and a classification circuit to classify the pixel as an image type based on the reduced values from the macroreduction circuits. The system also includes a circuit to detect flat peaks without detecting multiple peaks and a rectangular blur filtering system.
摘要翻译： 系统和方法将图像数据的像素分类为多个图像类型之一。 确定像素的第一图像特征值，像素的第二图像特征值，像素的第三图像特征值和用于像素的第四图像特性。 这些确定中的一些可能取决于分辨率。 来自这些确定的值被用于为像素分配图像类型分类。 此外，如果图像特征值中的至少一个大于预定阈值，则将像素分类为半色调峰值。 该系统包括用于确定像素的不同图像特征值的多个微分类器; 连接到所述多个微分类器的多个宏观还原电路，用于根据所述像素的不同图像特征值进行更高级的操作以产生减小的值; 以及分类电路，用于基于来自大致减小电路的减小值将像素分类为图像类型。 该系统还包括用于检测平坦峰而不检测多个峰的电路和矩形模糊滤波系统。
-
39.发明授权System and method of tonal correction of independent regions on a compound document 失效复合文件中独立区域的色调校正系统和方法公开(公告)号：US06175427B1
公开(公告)日：2001-01-16
申请号：US09063029
申请日：1998-04-20
IPC分类号： G06T540
CPC分类号： G06T5/40 , G06T5/007 , G06T2207/10008 , G06T2207/10024 , H04N1/4074
摘要： A system and method provides the necessary image information to enable tonal correction for independent regions of a compound document. A scanner scans an image and generates image data. A histogram circuit, connected to the scanner, generates histogram data from the image data for a predetermined number of regions corresponding to the image. A windowing circuit, operatively connected to the scanner and in parallel with the histogram circuit, generates a window corresponding to an independent area of the image that requires image enhancement and an association circuit associates corresponding histogram data with the generated window. The associated histogram data and window are used by an image enhancement process to modify the image data to provide a more desirable reproduction of the scanned image.
摘要翻译： 系统和方法提供必要的图像信息以对复合文档的独立区域进行色调校正。 扫描仪扫描图像并生成图像数据。 连接到扫描仪的直方图电路根据图像数据生成与图像对应的预定数量的区域的直方图数据。 可操作地连接到扫描仪并与直方图电路并行的开窗电路产生对应于需要图像增强的图像的独立区域的窗口，并且关联电路将对应的直方图数据与生成的窗口相关联。 相关联的直方图数据和窗口由图像增强处理使用以修改图像数据以提供扫描图像的更理想的再现。
-
40.发明授权Hybrid error diffusion pattern shifting reduction using programmable threshold perturbation 失效使用可编程阈值扰动的混合误差扩散模式移位减少
公开(公告)号：US5809177A
公开(公告)日：1998-09-15
申请号：US660045
申请日：1996-06-06
CPC分类号： H04N1/4053
摘要： A process eliminates pattern shifting artifacts in a printed image rendered using a hybrid high addressable error diffusion process by perturbing a threshold/image signal value relationship when a multi-level grey level is binarized. The process utilizes a programmable multi-level grey signal modifying circuit for modifying the multi-level grey signal by a predetermined value according to its grey level. The modified multi-level grey signal is binarized to a binary pixel signal according to a relationship between the modified multi-level grey signal and a threshold value. The process further generates an error corresponding to the relationship and diffuses the error to neighboring pixels. The multi-level grey signal is modified with either random noise multiplied by a grey level dependent coefficient or by a predetermined value from a checkerboard or vertical line pattern. The value from the pattern is dependent upon the grey level and pixel location of the image data.
摘要翻译： 当多级灰度级被二值化时，处理消除了使用混合高可寻址误差扩散处理所形成的打印图像中的图案移位伪像，该方法通过扰乱阈值/图像信号值关系。 该过程利用可编程多级灰度信号修正电路，根据其灰度级将多级灰度信号修正预定值。 修改后的多级灰度信号根据修改的多级灰度信号与阈值之间的关系被二值化为二进制像素信号。 该过程进一步产生与该关系对应的错误，并将误差扩散到相邻像素。 多级灰度信号用随机噪声乘以灰度级依赖系数或来自棋盘或垂直线图案的预定值进行修改。 图案中的值取决于图像数据的灰度级和像素位置。
-
-
-
-
-
-
-
-
-
搜索结果
55 条记录 (耗时 0.023 秒)