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公开(公告)号：US07085002B2
公开(公告)日：2006-08-01
申请号：US09859437
申请日：2001-05-18
IPC分类号： G06K15/10
CPC分类号： B41J2/0451 , B41J2/0458 , B41J2/2132 , B41J2202/17 , H04N1/40087 , H04N1/4015
摘要： An image recording apparatus (2000) is disclosed, which comprises forming elements (2002) for forming an image, a memory (2006) indicating relative desirability of utilising the forming elements (2002) for forming the image, and processing means (2008) for computing image recording signals using input image signals (2012) and the stored data. The use of a particular forming element is thereby biased dependent upon the relative desirability data of other forming elements, the corresponding input signal for the particular forming element, and a term for the particular forming element.
摘要翻译： 公开了一种图像记录装置（2000），其包括用于形成图像的形成元件（2002），指示利用形成元件（2002）形成图像的相对可取性的存储器（2006），以及用于形成图像的处理装置 使用输入图像信号（2012）和存储的数据来计算图像记录信号。 因此，特定成形元件的使用由于其它成形元件的相对期望数据，特定成形元件的相应输入信号和特定成形元件的术语而偏置。
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公开(公告)号：US6130661A
公开(公告)日：2000-10-10
申请号：US847221
申请日：1997-05-01
CPC分类号： H04N1/4055 , H04N1/4052
摘要： A method and apparatus are disclosed which permit a seamless halftoning of an image by halftoning regions of the image independently and/or in parallel. Each region of the image being arbitrarily determined, and being halftoned on the basis of halftoned pixel results of pixels within a predetermined neighborhood of the region. The arrangement providing a greater flexibility in the independent halftoning of the regions, while providing substantially seamless joins between abutting halftoned regions of the image. Further, the arrangement also provides a mechanism for parallel processing (halftoning) of abutting regions of an image with substantially seamless results.
摘要翻译： 公开了一种方法和装置，其允许通过将图像的区域独立地和/或并行地进行半色调来对图像进行无缝半色调。 图像的每个区域被任意确定，并且基于该区域的预定邻域内的像素的半色调像素结果被半色调。 这种布置在区域的独立半色调中提供更大的灵活性，同时在图像的邻接的半色调区域之间提供基本上无缝的连接。 此外，该装置还提供了用于以基本无缝结果并行处理（半色调）图像的邻接区域的机构。
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公开(公告)号：US08218908B2
公开(公告)日：2012-07-10
申请号：US12373140
申请日：2007-11-01
IPC分类号： G06K9/32
CPC分类号： H04N19/33
摘要： A method (200, 400) of compressing an input image (201) is described. The method (200, 400) starts by extracting image gradient data representing pixel differences along contours of the image. Next, the method forms an edge based image from the image gradient data and a low resolution image derived from the input image. The method then computes a residual image representing a difference between the edge based image and the input image, and finally compresses the input image by encoding the image gradient data, the low resolution image, and the residual image.
摘要翻译： 描述了压缩输入图像（201）的方法（200,400）。 方法（200,400）通过提取表示沿着图像的轮廓的像素差异的图像梯度数据开始。 接下来，该方法从图像梯度数据和从输入图像导出的低分辨率图像形成基于边缘的图像。 然后，该方法计算表示基于边缘的图像和输入图像之间的差的残差图像，并且最终通过对图像梯度数据，低分辨率图像和残差图像进行编码来压缩输入图像。
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公开(公告)号：US08411942B2
公开(公告)日：2013-04-02
申请号：US11947550
申请日：2007-11-29
申请人： Yu-Ling Chen , David Robert James Monaghan , Ian Geoffrey Combes , James Philip Andrew , Peter William Mitchell Ilbery , Anthony John Arnold , Dixon De Sheng Deng
发明人： Yu-Ling Chen , David Robert James Monaghan , Ian Geoffrey Combes , James Philip Andrew , Peter William Mitchell Ilbery , Anthony John Arnold , Dixon De Sheng Deng
CPC分类号： H04N19/93 , H04N19/12 , H04N19/136 , H04N19/17 , H04N19/182 , H04N19/186 , H04N19/20
摘要： A Hybrid Compressor and method of compressing a tile of pixels within an image are disclosed. An Edge Processor of the Hybrid Compressor analyzes pixel runs of the tile and generates boundary data defining one or more regions comprising pixels of substantially identical color. A Palette Processor of the Hybrid Compressor generates data defining a color value for each region. An Image Processor of the Hybrid Compressor generates a representation of pixels not included in the one or more regions.
摘要翻译： 公开了压缩图像内的像素块的混合压缩器和方法。 混合压缩器的边缘处理器分析瓦片的像素运行，并且生成界定包括基本相同颜色的像素的一个或多个区域的边界数据。 混合压缩器的调色板处理器生成定义每个区域的颜色值的数据。 混合压缩器的图像处理器生成不包括在一个或多个区域中的像素的表示。
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5.发明授权公开(公告)号：US07916173B2
公开(公告)日：2011-03-29
申请号：US11155632
申请日：2005-06-20
摘要： A method of determining a quality value for an image frame is disclosed. The method comprises dividing (in a step 202) the frame into a plurality of tiles (906) and determining attributes (in a step 206) of each said tile based upon pixel values of the tile, and pixel values of a corresponding tile of a preceding frame. The method then establishes (in steps 210, 212) the quality value of the frame by testing the tile attributes of the frame against pre-determined criteria. The method then defines (in a step 220) the quality value of the frame depending upon results of the testing.
摘要翻译： 公开了一种确定图像帧质量值的方法。 该方法包括基于瓦片的像素值将帧（在步骤202中）划分成多个瓦片（906）并确定每个所述瓦片的属性（在步骤206中），以及相应的瓦片的像素值 前一帧。 然后，该方法通过根据预定标准测试帧的瓦片属性来建立（在步骤210,212中）帧的质量值。 该方法然后根据测试结果定义（在步骤220中）帧的质量值。
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公开(公告)号：US20080144952A1
公开(公告)日：2008-06-19
申请号：US11947550
申请日：2007-11-29
申请人： Yu-Ling Chen , David Robert James Monaghan , Ian Geoffrey Combes , James Philip Andrew , Peter William Mitchell Ilbery , Anthony Jon Arnold , Dixon De Sheng Deng
发明人： Yu-Ling Chen , David Robert James Monaghan , Ian Geoffrey Combes , James Philip Andrew , Peter William Mitchell Ilbery , Anthony Jon Arnold , Dixon De Sheng Deng
IPC分类号： G06T9/00
CPC分类号： H04N19/93 , H04N19/12 , H04N19/136 , H04N19/17 , H04N19/182 , H04N19/186 , H04N19/20
摘要： A Hybrid Compressor (304) and method (500) of compressing a tile (2200) of pixels within an image are disclosed. An Edge Processor (404) of the Hybrid Compressor (304) analyses pixel runs (403) of the tile (2200) and generates boundary data defining one or more regions comprising pixels of substantially identical colour. A Palette Processor (411) of the Hybrid Compressor (304) generates data defining a colour value for each region. An Image Processor (416) of the Hybrid Compressor (304) generates a representation of pixels not included in the one or more regions.
摘要翻译： 公开了压缩图像内的像素块（2200）的混合压缩器（304）和方法（500）。 混合压缩器（304）的边缘处理器（404）分析瓦片（2200）的像素运行（403）并且生成限定包括基本相同颜色的像素的一个或多个区域的边界数据。 混合压缩器（304）的调色板处理器（411）产生定义每个区域的颜色值的数据。 混合压缩器（304）的图像处理器（416）生成不包括在一个或多个区域中的像素的表示。
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公开(公告)号：US6124844A
公开(公告)日：2000-09-26
申请号：US779009
申请日：1997-01-02
CPC分类号： H04N1/4055
摘要： A method and apparatus are disclosed which permit halftoning of pixels in an image based upon the relative repulsive forces between a current pixel being halftoned and preferably all previous pixels that have been halftoned. Such arrangements give improved halftoned image quality, at least for some images, compared to that obtained from error diffusion or dithering.
摘要翻译： 公开了一种方法和装置，其基于当前被半色调的像素之间的相对排斥力，优选地已经被半色调的所有先前像素，允许对图像中的像素进行半色调。 与从误差扩散或抖动获得的相比，至少对于一些图像而言，这样的布置给出了改进的半色调图像质量。
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公开(公告)号：US20090245661A1
公开(公告)日：2009-10-01
申请号：US12373140
申请日：2007-11-01
IPC分类号： G06K9/36
CPC分类号： H04N19/33
摘要： A method (200, 400) of compressing an input image (201) is described. The method (200, 400) starts by extracting image gradient data representing pixel differences along contours of the image. Next, the method forms an edge based image from the image gradient data and a low resolution image derived from the input image. The method then computes a residual image representing a difference between the edge based image and the input image, and finally compresses the input image by encoding the image gradient data, the low resolution image, and the residual image.
摘要翻译： 描述了压缩输入图像（201）的方法（200,400）。 方法（200,400）通过提取表示沿着图像的轮廓的像素差异的图像梯度数据开始。 接下来，该方法从图像梯度数据和从输入图像导出的低分辨率图像形成基于边缘的图像。 然后，该方法计算表示基于边缘的图像和输入图像之间的差的残差图像，并且最终通过对图像梯度数据，低分辨率图像和残差图像进行编码来压缩输入图像。
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公开(公告)号：US07057773B2
公开(公告)日：2006-06-06
申请号：US10029267
申请日：2001-12-28
CPC分类号： H04N1/4052
摘要： An apparatus (1100) for halftoning an image is disclosed. The apparatus comprises means for determining an output value of a current pixel on a current scanline using a sum of an input value (1102) for the current pixel and a neighborhood error value (1150) at the current pixel, means (1124) for determining an error at the current pixel as the difference between (i) the sum of the input value (1102) for the current pixel and the neighborhood error value (1150) at the current pixel, and (ii) the output value (1120) of the current pixel; and means (1140) for adding a proportion of the error at the current pixel to neighborhood error values at as yet unprocessed pixels of a subsequent scanline in accordance with a next scanline error impulse response; wherein said next scanline error impulse response approximates a function which spreads with self-convolution in proportion to a degree of self-convolution.
摘要翻译： 公开了一种用于半色调图像的设备（1100）。 该装置包括用于使用当前像素的输入值（1102）和当前像素处的邻近误差值（1150）来确定当前扫描线上的当前像素的输出值的装置，用于确定 当前像素的误差为（i）当前像素的输入值（1102）与当前像素之间的相邻误差值（1150）的和之间的差，以及（ii）当前像素的输出值 当前像素; 以及用于根据下一扫描线误差脉冲响应将当前像素处的误差的一部分相加于随后扫描线的未处理像素的邻近误差值的装置（1140） 其中所述下一扫描线误差脉冲响应近似于与自卷积成比例地以自卷积扩展的函数。
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公开(公告)号：US6108452A
公开(公告)日：2000-08-22
申请号：US779357
申请日：1997-01-06
CPC分类号： H04N1/4052
摘要： An image processing system in which a computer image is halftoned by halftoning a current pixel using error diffusion, with a halftoned output value of the current pixel being determined using errors derived from substantially all previously halftoned pixels of the image. Output error values are determined for each pixel, and are acted upon by an error diffusion mask of geometrically reducing values. In certain instances, previously halftoned pixels are divided into two or more groups to obtain a desired contribution from previously halftoned pixels.
摘要翻译： 一种图像处理系统，其中通过使用误差扩散半色调当前像素来对计算机图像进行半色调，其中当前像素的半色调输出值使用从图像的基本上所有先前半色调像素导出的误差来确定。 为每个像素确定输出误差值，并通过几何减小值的误差扩散掩模进行操作。 在某些情况下，先前的半色调像素被分成两组或更多组，以从先前的半色调像素获得期望的贡献。
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