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1. 发明授权

US06476936B1 Method for scanning screened image master images 失效
标题翻译：扫描图像主图像的方法
公开(公告)号：US06476936B1
公开(公告)日：2002-11-05
申请号：US09403671
申请日：1999-12-07
申请人： Jörg Olaf Von Wechgeln
发明人： Jörg Olaf Von Wechgeln
IPC分类号： H04N100
CPC分类号： H04N1/40075
摘要： A method for opto-electronic scanning, by pixel and by line, of screened master photographic images with a sensing device. From the actual scanning, at least one master photographic image area that contains the grid scale is detected in the screened master photographic image. Subsequently, the picture values present in the local area of the detected grid scale area of the master photographic image are transferred by Fourier transformation to the frequency range as a spatial frequency spectrum, and, from the spatial frequency spectrum, the screen ruling and raster angle of the raster of the master photographic image are determined. For the determined raster angle and the determined screen rulings of the grid scale of the master photographic image, the optimal scan frequencies for Moiré-free scanning are determined from the spatial frequency spectrum. The optimal scan frequencies which determined the scanning fineness are set at the sensing device and then the screened master photographic image is scanned with the set optical scan frequencies, to obtain the picture values necessary for reproduction of the screened master photographic image.
摘要翻译：通过像素和逐行扫描的主摄影图像与感测装置的光电扫描方法。从实际扫描中，在被筛选的主摄影图像中检测到包含网格标尺的至少一个主摄影图像区域。随后，通过傅里叶变换将出现在主摄影图像的检测到的网格尺度区域的局部区域中的图像值作为空间频谱传送到频率范围，并且从空间频谱，屏幕尺度和光栅角度确定主摄影图像的光栅。对于所确定的光栅角度和主摄影图像的网格尺度的确定的屏幕尺度，从空间频谱确定无摩尔扫描的最佳扫描频率。将确定扫描细度的最佳扫描频率设置在感测装置处，然后用设定的光学扫描频率扫描被筛选的主摄影图像，以获得再现筛选的主摄影图像所需的图像值。

2. 发明授权

US07505177B2 Method for generating a threshold value matrix for frequency modulated half-toning 有权
标题翻译：用于生成调频半色调阈值矩阵的方法
公开(公告)号：US07505177B2
公开(公告)日：2009-03-17
申请号：US11289145
申请日：2005-11-29
申请人： Jörg Olaf Von Wechgeln , Michael Hansen
发明人： Jörg Olaf Von Wechgeln , Michael Hansen
IPC分类号： H04N1/405
CPC分类号： H04N1/4051
摘要： A method for generating a threshold value matrix is used in the frequency-modulated half-toning of the image data to be reproduced. A threshold value matrix for a basic screen is generated in that low-pass filters of different width are applied to the bit patterns generated and the threshold value distribution is changed on the basis of the filtered results. Furthermore, the bit patterns generated are examined for specific part patterns and the threshold value distribution is changed in such a way that undesired part patterns no longer occur and, instead, desired part patterns, preferably rounded forms, are contained in the bit patterns generated. By use of a combination of scaling and/or rotation and/or mirroring of the threshold value matrix of the basic screen, threshold value matrices are generated for the printing inks.
摘要翻译：在要再现的图像数据的调频半色调中使用生成阈值矩阵的方法。产生用于基本屏幕的阈值矩阵，因为不同宽度的低通滤波器被应用于所生成的位图案，并且基于滤波结果改变阈值分布。此外，针对特定部位模式检查所产生的位模式，并且以不再发生不期望的部分模式的方式改变阈值分布，并且相反地，在生成的位模式中包含期望的部分模式，优选舍入形式。通过使用基本屏幕的阈值矩阵的缩放和/或旋转和/或镜像的组合，为印刷油墨生成阈值矩阵。

3. 发明授权

US06697168B2 Method for calibrating image recording equipment 失效
标题翻译：校准图像记录设备的方法
公开(公告)号：US06697168B2
公开(公告)日：2004-02-24
申请号：US09740650
申请日：2000-12-18
申请人： Jörg Olaf Von Wechgeln
发明人： Jörg Olaf Von Wechgeln
IPC分类号： H04N1407
CPC分类号： H04N1/4055
摘要： A method for calibrating image recording equipment is described. According to the method, raster areas such as images or color prints are recorded pixel by pixel, line by line in the form of screen dots on an image support by use of at least one exposure beam generated in an exposure unit. An image stored as a bit-map image and containing line data (binary image) is divided into fields. A raster percentage is determined for every field by calculating an average. A variation in the raster percentage is determined from a density-exposure curve. The parameters required for the variation are calculated by an algorithm and memorized in a variation table. The most suitable algorithm is read from the variation table and executed and the data determined thereby are memorized.
摘要翻译：描述了用于校准图像记录设备的方法。根据该方法，通过使用在曝光单元中产生的至少一个曝光束，以图像支持上的屏幕点的形式逐行地逐行记录诸如图像或彩色打印的光栅区域。存储为位图图像并包含行数据（二进制图像）的图像被分为字段。通过计算平均值为每个字段确定栅格百分比。光栅百分比的变化由密度 - 曝光曲线确定。通过算法计算变化所需的参数，并记录在变化表中。从变化表读取最合适的算法，并执行，从而存储由此确定的数据。

4. 发明授权

US07933466B2 Grey value correction method for binary image data 失效
标题翻译：二进制图像数据灰度校正方法
公开(公告)号：US07933466B2
公开(公告)日：2011-04-26
申请号：US10811475
申请日：2004-03-24
申请人： Michael Hansen , Jörg Olaf Von Wechgeln
发明人： Michael Hansen , Jörg Olaf Von Wechgeln
IPC分类号： G06K9/40
CPC分类号： G06K9/38 , G06T5/008 , H04N1/4055 , H04N5/20 , H04N5/202
摘要： A method of gray value correction for binary image data, preferably screened image data, with a local gray value by a desired correction magnitude includes filtering the image data quantized with n bits with an asymmetrical low-pass filter whose filter window is smaller than a screen cell. By a threshold value operation, corrected binary image data is obtained from the filtered image data. Optimum threshold values are selected from a threshold value table as a function of the local gray value and of the desired correction magnitude.
摘要翻译：对于具有局部灰度值所需的校正幅度的二进制图像数据，优选地屏蔽图像数据的灰度值校正方法包括用滤波器窗口小于屏幕的非对称低通滤波器对n位量化的图像数据进行滤波细胞。通过阈值操作，从经滤波的图像数据获得校正后的二进制图像数据。从阈值表中选择最佳阈值作为局部灰度值和期望的校正量值的函数。

5. 发明授权

US07515303B2 Process for the modeling of dots for a screen 有权
标题翻译：用于屏幕点的建模过程
公开(公告)号：US07515303B2
公开(公告)日：2009-04-07
申请号：US11392060
申请日：2006-03-29
申请人： Michael Hansen , Jörg Olaf von Wechgeln
发明人： Michael Hansen , Jörg Olaf von Wechgeln
IPC分类号： H04N1/405
CPC分类号： H04N1/4051 , H04N1/403
摘要： A process for the modeling of dots in the generation of a threshold matrix for a screen for the production of a screen form for the printing of image data. The dots are described by model points built up from computed points with an assigned density value. For modeling of ink-jet printing, in the area of overlap of neighboring model points the density values of the computed points are added to form a sum density, the sum density is limited to a maximum possible blackening, and the percentages of the sum density which exceed the maximum possible blackening are distributed to the neighboring computed points. For the modeling of offset printing, in the area of overlap of neighboring model points the maximum of the density values of the computed points is determined as the resulting density and with a filter operation a dilatation of the model points is effected.
摘要翻译：用于生成用于生成用于打印图像数据的屏幕形式的屏幕的阈值矩阵的点的建模的过程。点由具有分配密度值的计算点构建的模型点描述。对于喷墨印刷的建模，在相邻模型点的重叠区域中，加入计算点的密度值以形成总和密度，总和密度被限制为最大可能变黑，并且总和密度的百分比其超过最大可能的黑化分布到相邻的计算点。对于胶版印刷的建模，在相邻模型点的重叠区域中，计算点的密度值的最大值被确定为所得到的密度，并且使用滤波器操作来实现模型点的扩展。

6. 发明授权

US06931163B1 Method for converting the coordinates of image data by way of random offset of the picture elements 有权
标题翻译：通过图像元素的随机偏移来转换图像数据的坐标的方法
公开(公告)号：US06931163B1
公开(公告)日：2005-08-16
申请号：US09646502
申请日：1999-03-02
申请人： Jörg Olaf von Wechgeln
发明人： Jörg Olaf von Wechgeln
IPC分类号： B41J2/52 , G06T3/40 , H04N1/387 , H04N1/393 , G06K15/00
CPC分类号： G06T3/4007 , H04N1/3935
摘要： In a method for converting the coordinates of image data, the positions of new picture elements in a new coordinate system are calculated by means of coordinate transformation equations from the positions of initial picture elements in an initial coordinate system. The positions of the new picture elements are randomly modified in a variation range around the positions calculated by way of the coordinate transformation. For this purpose, random values are added to the calculated coordinates of the new picture elements. The method can be used in case of scale conversions, image rotation, etc. to improve the quality of the converted image. The method avoids both the corruption of the image structures caused by coordinate conversion and the formation of disruptive moire patterns. The method can be combined with known methods for calculating the color values of the new picture elements, such as the nearest-neighbor method or the interpolation method.
摘要翻译：在用于转换图像数据的坐标的方法中，通过来自初始坐标系中的初始图像元素的位置的坐标变换方程来计算新坐标系中的新图像元素的位置。新图像元素的位置在通过坐标变换计算的位置周围的变化范围内被随机地修改。为此，将随机值添加到新图像元素的计算坐标中。该方法可用于缩放转换，图像旋转等情况，以提高转换图像的质量。该方法避免了由坐标转换引起的图像结构的破坏和形成破坏性莫尔图案。该方法可以与用于计算新图像元素的颜色值的已知方法（例如最近邻方法或内插方法）组合。

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