-
公开(公告)号：US09106864B2
公开(公告)日：2015-08-11
申请号：US14057509
申请日：2013-10-18
Applicant: XEROX CORPORATION
Inventor： Xing Li , Ryan Metcalfe
CPC classification number: H04N1/4052 , H04N1/40087 , H04N1/405 , H04N1/409
Abstract: The present invention generally relates to systems and methods for error diffusion, e.g., for use in a halftone process. The described techniques are faster than known techniques in that they utilize fewer computations on average. Consequently, the described techniques can be more readily implemented in software, for example, though the described techniques are not limited to software.
Abstract translation: 本发明一般涉及用于误差扩散的系统和方法，例如用于半色调处理。 所描述的技术比已知技术更快，因为它们平均使用较少的计算。 因此，所描述的技术可以更容易地在软件中实现，例如，尽管所描述的技术不限于软件。
-
公开(公告)号：US09106865B2
公开(公告)日：2015-08-11
申请号：US14074477
申请日：2013-11-07
Applicant: XEROX CORPORATION
Inventor： Xing Li , Ryan Metcalfe
CPC classification number: H04N1/4052 , H04N1/40087 , H04N1/405 , H04N1/409
Abstract: The present invention generally relates to systems and methods for error diffusion, e.g., for use in a halftone process. The described techniques are faster than known techniques in that they utilize fewer computations on average. Consequently, the described techniques can be more readily implemented in software, for example, though the described techniques are not limited to software.
-
公开(公告)号：US09025222B1
公开(公告)日：2015-05-05
申请号：US14313461
申请日：2014-06-24
Applicant: Xerox Corporation
Inventor： Xing Li , Zhenhuan Wen , Ryan Metcalfe
CPC classification number: H04N1/00023 , H04N1/00018 , H04N1/00045 , H04N1/00087 , H04N1/6033 , H04N2201/0005 , H04N2201/0081
Abstract: Methods and systems methods calculate an initial matrix by correlating scanned test device-dependent values to device-independent color space values of a test sheet. The initial matrix converts device-dependent values to device-independent color space values; however, the initial matrix does include some conversion error. Such methods then calculate an inverse matrix from the initial matrix. These methods and systems then calculate target device-dependent values by applying the device-independent color space values to the inverse matrix. The methods and systems derive final one-dimensional look-up tables that isolate the conversion error by correlating the scanned test device-dependent values to the device-independent color space values. These methods and systems then derive a final matrix specific to the scanner by first applying the scanned test device-dependent values to the final one-dimensional look-up tables before creating the final matrix. Then, this final matrix can be substituted for the previously calculated conversion matrix used for non-calibration operation.
Abstract translation: 方法和系统方法通过将扫描的测试设备相关值与测试表的设备无关的颜色空间值相关联来计算初始矩阵。 初始矩阵将设备相关值转换为与设备无关的色彩空间值; 然而，初始矩阵确实包括一些转换误差。 这样的方法然后从初始矩阵计算逆矩阵。 然后，这些方法和系统通过将与设备无关的颜色空间值应用于逆矩阵来计算目标设备相关值。 方法和系统通过将扫描的与测试设备相关的值与设备无关的色彩空间值进行关联来获得最终的一维查找表，从而隔离转换错误。 然后，这些方法和系统通过在创建最终矩阵之前首先将扫描的与测试设备相关的值应用于最终的一维查找表，从而获得特定于扫描仪的最终矩阵。 然后，该最终矩阵可以代替用于非校准操作的先前计算的转换矩阵。
-
公开(公告)号：US20150110411A1
公开(公告)日：2015-04-23
申请号：US14057509
申请日：2013-10-18
Applicant: XEROX CORPORATION
Inventor： Xing Li , Ryan Metcalfe
IPC: H04N1/405
CPC classification number: H04N1/4052 , H04N1/40087 , H04N1/405 , H04N1/409
Abstract: The present invention generally relates to systems and methods for error diffusion, e.g., for use in a halftone process. The described techniques are faster than known techniques in that they utilize fewer computations on average. Consequently, the described techniques can be more readily implemented in software, for example, though the described techniques are not limited to software.
Abstract translation: 本发明一般涉及用于误差扩散的系统和方法，例如用于半色调处理。 所描述的技术比已知技术更快，因为它们平均使用较少的计算。 因此，所描述的技术可以更容易地在软件中实现，例如，尽管所描述的技术不限于软件。
-
-
-
Search Results
4
records
(took 0.009 seconds)
