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1. 发明授权

US6011631A Uniform exposure of photosensitive medium by square intensity profiles for printing 失效
标题翻译：通过平面强度分布均匀曝光光敏介质进行印刷
公开(公告)号：US6011631A
公开(公告)日：2000-01-04
申请号：US791061
申请日：1997-01-29
申请人： Dirk K. Broddin , Frank A. Deschuytere , Robert F. Janssens , William E. Nelson , Vadlamannati Venkateswar
发明人： Dirk K. Broddin , Frank A. Deschuytere , Robert F. Janssens , William E. Nelson , Vadlamannati Venkateswar
IPC分类号： G03G15/00 , H04N1/407 , G02B26/08 , B41J2/435 , G02F1/00
CPC分类号： H04N1/407 , G03G15/5037 , G03G2215/00042
摘要： In classic optical rendering systems, the spot, illuminating a microdot on the photosensitive medium, is designed to overlap with neighboring microdots, typically having an overlap of 1.7 times the pitch of the microdots, for a luminous intensity of 1/e.sup.2 the highest intensity. A "sharp" photosensitive medium, such as a photographic film used in graphical applications, generates a binary circle, obtainable by thresholding. The area of such a circle is too large, which results in higher dot gain.Many systems, such as electrographic systems, do not behave as a "sharp" medium. If intermediate energy levels are used, in order to obtain continuous tone or multiple density levels, thresholding behavior may be avoided by appropriate choice of energy levels. Such a different sensitometry results in specific requirements for the energy distribution for each microdot.A square shaped uniform energy distribution within the space allotted to each microdot, allows for multiple density levels, without severe sensitometric requirements.
摘要翻译：在经典的光学渲染系统中，照射光敏介质上的微点的点被设计为与相邻的微点重叠，通常具有1.7倍于微点的间距的重叠，对于最高强度的1 / e2的发光强度。诸如在图形应用中使用的摄影胶片的“锋利”感光介质产生可通过阈值获得的二进制圆。这种圆的面积太大，这导致更高的网点增益。许多系统，如电子照相系统，不表现为“尖锐”的媒介。如果使用中间能量级别，为了获得连续色调或多重密度水平，可以通过适当选择能量水平来避免阈值行为。这种不同的感光度导致对于每个微点的能量分布的特定要求。在分配给每个微点的空间内的方形均匀能量分布允许多个密度水平，而没有严格的感光度要求。

2. 发明授权

US5453778A Method and apparatus for spatial modulation in the cross-process direction 失效
标题翻译：交叉过程方向空间调制方法和装置
公开(公告)号：US5453778A
公开(公告)日：1995-09-26
申请号：US100892
申请日：1993-07-30
申请人： Vadlamannati Venkateswar , William E. Nelson
发明人： Vadlamannati Venkateswar , William E. Nelson
IPC分类号： G06K15/12 , B41J2/435 , G03G15/04
CPC分类号： G06K15/1252
摘要： A method and apparatus for spatial modulation in the cross-process direction. A spatial light modulator includes an array (12) of individual elements. Light from a light source (14) is reflected from these individual elements onto phases of pixels (20 and 54) of an organic photoconductive drum (16) thereby determining the gray shade of that pixel. The light from the individual elements may be focused through optics (18).
摘要翻译：一种在交叉过程方向进行空间调制的方法和装置。空间光调制器包括单个元件的阵列（12）。来自光源（14）的光从这些各个元件反射到有机感光鼓（16）的像素（20和54）的相位上，从而确定该像素的灰色阴影。来自各个元件的光可以通过光学器件聚焦（18）。

3. 发明授权

US5490009A Enhanced resolution for digital micro-mirror displays 失效
标题翻译：数字微镜显示器增强分辨率
公开(公告)号：US5490009A
公开(公告)日：1996-02-06
申请号：US332023
申请日：1994-10-31
申请人： Vadlamannati Venkateswar , William E. Nelson
发明人： Vadlamannati Venkateswar , William E. Nelson
IPC分类号： G02B26/08 , G02F1/133 , G09G3/34 , G09G5/00 , H04N5/66 , H04N5/74 , G02B26/00
CPC分类号： H04N5/7458 , G02B26/0841
摘要： A display system (20) that uses multiple SLMs (25) to enhance horizontal or vertical resolution, or both. For example, to approximate a two-fold increase in horizontal resolution, the input data is sampled at a doubled rate, and each SLM (25) receives every other sample. Each SLM (25) generates an image, and the two images are partially superposed with a horizontal offset and simultaneously displayed. The resulting output image has a perceived resolution that approximates that of an image generated by an SLM with twice as many pixels per row.
摘要翻译：一种使用多个SLM（25）来增强水平或垂直分辨率或两者的显示系统（20）。例如，为了近似水平分辨率的两倍增加，输入数据以双倍速率进行采样，并且每个SLM（25）接收每隔一个采样。每个SLM（25）生成图像，并且两个图像被部分地叠加有水平偏移并且同时显示。所得到的输出图像具有近似于由SLM生成的图像的感知分辨率，每行具有两倍的像素。

4. 发明授权

US06532016B1 Method of processing print data using parallel raster image processing 失效
标题翻译：使用平行光栅图像处理处理打印数据的方法
公开(公告)号：US06532016B1
公开(公告)日：2003-03-11
申请号：US08956402
申请日：1997-10-23
申请人： Vadlamannati Venkateswar , Praveen K. Ganapathy , Ralph E. Payne , Arunabha Ghose
发明人： Vadlamannati Venkateswar , Praveen K. Ganapathy , Ralph E. Payne , Arunabha Ghose
IPC分类号： G06F1516
CPC分类号： G06K15/02 , G06K15/1851 , G06K15/1857
摘要： A method of processing print data allowing for rendering bands of print data in parallel. A main processor (52) of a single-chip multiprocessor converts an incoming page of print data into paths. The paths are then converted to primitives and the primitives are rasterized using parallel processor (60, 62, 64, 66). The parallel processors (60, 62, 64, 66) work in concert with the main processor (52) such that bands of the final print image are rendered into a frame buffer (58) in parallel, allowing for faster and more efficient processing of print data.

5. 发明授权

US5841956A Anti-aliasing for digital printing with dot shape modulation and greyscale 失效
标题翻译：用于数字打印的抗锯齿，具有点形调制和灰度
公开(公告)号：US5841956A
公开(公告)日：1998-11-24
申请号：US778460
申请日：1997-01-03
申请人： Vadlamannati Venkateswar , Gerhard P. Deffner
发明人： Vadlamannati Venkateswar , Gerhard P. Deffner
IPC分类号： G06K15/12 , H04N1/40 , H04N1/23 , G06K15/02 , H04N1/405
CPC分类号： H04N1/40043 , G06K15/1252 , H04N1/40025
摘要： A method of reducing the effects of aliasing. Pixels are divided into phases, such that a phase or combination of phases may be printed to provide one of a number of dot shapes for each pixel. When a pixel is partly overlapped by an object to be printed, that pixel's dot shape is determined by determining which dot shape is the best geometrical match with the overlap. (FIGS. 3 and 7). Then, a greyscale value is determined for the selected dot shape by determining what greyscale will provide an effective greyscale that substantially corresponds to the percent of overlap by the object with the pixel. An alternative method selects a greyscale value for each phase rather than for the entire dot shape.
摘要翻译：减少混叠效应的方法。像素被分成相位，使得可以打印相位或相位的组合以提供每个像素的多个点形状之一。当像素被要打印的对象部分地重叠时，通过确定哪个点形状是与重叠的最佳几何匹配来确定该像素的点形状。（图3和图7）。然后，通过确定什么灰度将提供基本上对应于物体与像素的重叠百分比的有效灰度来确定所选择的点形状的灰度值。一种替代方法为每个阶段而不是整个点形状选择灰度值。

6. 发明授权

US5699168A Grayscale printing with sliding window memory 失效
标题翻译：灰色打印带滑动窗口记忆
公开(公告)号：US5699168A
公开(公告)日：1997-12-16
申请号：US493444
申请日：1995-06-22
申请人： Vadlamannati Venkateswar
发明人： Vadlamannati Venkateswar
IPC分类号： B41J2/52 , B41J2/44 , G02B26/08 , G06K15/12 , H04N1/40 , H04N1/401 , H04N1/405 , G01D9/42 , H04N1/23
CPC分类号： H04N1/4015 , G06K15/1238 , H04N1/40031 , G06K2215/0085
摘要： A method for printing grayscale images. A sliding window memory stores an array of exposure data. The memory is initialized (80) with zero values. The memory is then addressed (82) so that the last row of the array is filled with exposure data. A microimage is then generated based on the exposure data (84). The data in the array is then decremented (86). If the page to be printed is not completed, the array's addresses are rotated (82) so that the data for the first row drops out, the data for other rows is readdressed as the next row, and new data fills the last row.
摘要翻译：打印灰度图像的方法。滑动窗口存储器存储曝光数据的阵列。存储器被初始化（80），零值。然后存储器被寻址（82），使得阵列的最后一行被填充曝光数据。然后基于曝光数据（84）生成微图像。然后数组中的数据递减（86）。如果要打印的页面未完成，则将数组的地址旋转（82），以使第一行的数据丢失，其他行的数据将被读取为下一行，新数据将填充最后一行。

7. 发明授权

US6078687A Quantization for a digital printer using modulated image data 失效
标题翻译：使用调制图像数据对数字打印机进行量化
公开(公告)号：US6078687A
公开(公告)日：2000-06-20
申请号：US993641
申请日：1997-12-18
申请人： Vadlamannati Venkateswar
发明人： Vadlamannati Venkateswar
IPC分类号： G06T9/00 , G06K9/00
CPC分类号： G06T9/005
摘要： A method of dynamically quantizing pixel data for use by a digital printer system that prints the pixel data with modulated pixel values. The data is first modulated, with the output pixel values being determined by an image screen. (FIGS. 1 and 2). Then, the data is quantized, using different quantization tables for different pixel values of the same image. The parameters that determine which quantization table is used for a particular pixel value include the pixel's position with respect to the screen or the pixel's image content. (FIGS. 3 and 5) In the case of data that is also being compressed with differential pulse code modulation, the quantization can be based on a buffer fullness measure (FIG. 6).
摘要翻译：一种动态量化像素数据以供数字打印机系统使用的方法，该数字打印机系统以调制的像素值打印像素数据。首先调制数据，输出像素值由图像屏幕确定。（图1和图2）。然后，对同一图像的不同像素值使用不同的量化表来量化数据。确定哪个量化表用于特定像素值的参数包括像素相对于屏幕或像素的图像内容的位置。（图3和图5）在用差分脉冲编码调制也被压缩的数据的情况下，量化可以基于缓冲器充满度量度（图6）。

8. 发明授权

US5630027A Method and apparatus for compensating horizontal and vertical alignment errors in display systems 失效
标题翻译：用于补偿显示系统中的水平和垂直对准误差的方法和装置
公开(公告)号：US5630027A
公开(公告)日：1997-05-13
申请号：US364916
申请日：1994-12-28
申请人： Vadlamannati Venkateswar , Vivek K. Thakur
发明人： Vadlamannati Venkateswar , Vivek K. Thakur
IPC分类号： B41J2/44 , B41J2/45 , B41J2/455 , G02B26/08 , G06K15/10 , G06K15/12 , H04N1/40 , B41B15/00
CPC分类号： G06K15/1242 , G06K15/10 , G06K15/1252 , G06K2215/111
摘要： The present invention provides a method of ameliorating the effects of misalignment between modulator arrays, and a system using the same. The ability reduce the effects of misalignment allows multiple, smaller, more cost effective arrays to be used instead of one large array. This can reduce the manufacturing costs of the array, especially arrays that are produced using semiconductor manufacturing processes such as the digital micromirror device. To avoid visual artifacts caused by the misalignment of two or more modulator arrays 1702, 1704, the individual arrays 1702, 1704 are optically overlapped and a portion of the image 1706 is generated by both arrays 1702, 1704. A breakpoint is chosen between two pixels in the overlapped region 1706 at which to abut the images from each of the modulator arrays 1702, 1704. The breakpoint is changed each row of pixels to minimize the detectability of any visual artifact caused by misalignment between the modulator arrays 1702, 1704.
摘要翻译：本发明提供一种改善调制器阵列之间的未对准的效果的方法和使用其的系统。降低失准影响的能力允许使用多个，更小，更具成本效益的阵列而不是一个大阵列。这可以降低阵列的制造成本，特别是使用诸如数字微镜器件的半导体制造工艺生产的阵列。为了避免由两个或更多个调制器阵列1702,1704的未对准引起的视觉伪像，各个阵列1702,1704被光学重叠，并且图像1706的一部分由阵列1702,1704产生。在两个像素之间选择断点在重叠区域1706中，其邻接来自每个调制器阵列1702,1704的图像。每个像素点改变断点，以最小化由调制器阵列1702,1704之间的未对准引起的任何视觉伪影的可检测性。

9. 发明授权

US06330362B1 Compression for multi-level screened images 失效
标题翻译：压缩多级屏幕图像
公开(公告)号：US06330362B1
公开(公告)日：2001-12-11
申请号：US08747291
申请日：1996-11-12
申请人： Vadlamannati Venkateswar
发明人： Vadlamannati Venkateswar
IPC分类号： G06K936
CPC分类号： H04N1/41 , G06T9/004 , G06T9/007
摘要： A method for compressing screened image data for printing. The data is generated by tiling an image with multi-pixel cells. The pixels within any one cell may or may not be rescanned to be better fit for compression. The method allows for selection between two compression paths, one which has no loss (24), the other which is lossy (26). Once the data is compressed, the information is stored in a buffer (16), then sent to the exposure module. If the lossy scheme is selected, a quantization factor (14) is used in compression that may be adjusted, depending upon feedback signals (18,20), to increase or decrease the compression.
摘要翻译：一种用于压缩被筛选的图像数据进行打印的方法。通过用多像素单元平铺图像来生成数据。任何一个单元内的像素可能被重新扫描或不被重新扫描以更好地适合于压缩。该方法允许在两个压缩路径之间进行选择，一个没有损耗（24），另一个是有损耗的（26）。一旦数据被压缩，信息被存储在缓冲器（16）中，然后被发送到曝光模块。如果选择有损方案，则在压缩中使用量化因子（14），其可以根据反馈信号（18,20）进行调整，以增加或减少压缩。

10. 发明授权

US6137593A Method of compensating horizontal and vertical alignment errors in display systems 失效
标题翻译：补偿显示系统中水平和垂直对准误差的方法
公开(公告)号：US6137593A
公开(公告)日：2000-10-24
申请号：US012091
申请日：1998-01-22
申请人： Vadlamannati Venkateswar , Vivek Kumar Thakur
发明人： Vadlamannati Venkateswar , Vivek Kumar Thakur
IPC分类号： B41J2/44 , B41J2/45 , B41J2/455 , G02B26/08 , G06K15/10 , G06K15/12 , H04N1/40 , G06F15/00
CPC分类号： G06K15/1242 , G06K15/10 , G06K15/1252 , G06K2215/111
摘要： The present invention provides a method of ameliorating the effects of misalignment between modulator arrays, and a system using the same. The ability reduce the effects of misalignment allows multiple, smaller, more cost effective arrays to be used instead of one large array. This can reduce the manufacturing costs of the array, especially arrays that are produced using semiconductor manufacturing processes such as the digital micromirror device. To avoid visual artifacts caused by the misalignment of two or more modulator arrays 1702, 1704, the individual arrays 1702, 1704 are optically overlapped and a portion of the image 1706 is generated by both arrays 1702, 1704. A breakpoint is chosen between two pixels in the overlapped region 1706 at which to abut the images from each of the modulator arrays 1702, 1704. The breakpoint is changed each row of pixels to minimize the detectability of any visual artifact caused by misalignment between the modulator arrays 1702, 1704.
摘要翻译：本发明提供一种改善调制器阵列之间的未对准的效果的方法和使用其的系统。降低失准影响的能力允许使用多个，更小，更具成本效益的阵列而不是一个大阵列。这可以降低阵列的制造成本，特别是使用诸如数字微镜器件的半导体制造工艺生产的阵列。为了避免由两个或更多个调制器阵列1702,1704的未对准引起的视觉伪像，各个阵列1702,1704被光学重叠，并且图像1706的一部分由阵列1702,1704产生。在两个像素之间选择断点在重叠区域1706中，其邻接来自每个调制器阵列1702,1704的图像。每个像素点改变断点，以最小化由调制器阵列1702,1704之间的未对准引起的任何视觉伪影的可检测性。

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