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1. 发明公开

EP1010138A1 DEVICE PROFILES FOR USE IN A DIGITAL IMAGE PROCESSING SYSTEM 失效
标题翻译：设备配置文件用在数字处理系统
公开(公告)号：EP1010138A1
公开(公告)日：2000-06-21
申请号：EP97925683.1
申请日：1997-05-21
申请人： POLAROID CORPORATION
发明人： HULTGREN, Bror, O., III , COTTRELL, F., Richard , THORNTON, Jay, E.
IPC分类号： G06T1/00
CPC分类号： G06T1/00
摘要： Device profiles conventionally describe properties of a device or element within a digital image processing system that capture, transform or render color components of an image. An improved device profile includes both chromatic characteristic information and spatial characteristic information. The device profile is generated by use of both chromatic and spatial characteristic functions within a model based image processing system to predict both color and spatial characteristics of a processed image. The device profile generally includes: first data for describing a device dependent transformation of color information content of the image; and second data for describing a device dependent transformation of spatial information content of the image. In a special case, the device profile could contain only spatial characteristic information.

2. 发明公开

EP1597911A2 DIGITAL IMAGE EXPOSURE CORRECTION 审中-公开
标题翻译：数字图像曝光
公开(公告)号：EP1597911A2
公开(公告)日：2005-11-23
申请号：EP04712899.6
申请日：2004-02-19
申请人： POLAROID CORPORATION
发明人： SAQUIB, Suhail, S. , THORNTON, Jay, E.
IPC分类号： H04N1/407 , H04N1/60
CPC分类号： H04N1/4072
摘要： Techniques are disclosed for correcting the exposure of a digital image. An exposure predictor may be generated based on a set of images for which ground truth data are known. After identifying an optimal set of features, the exposure of the digital image may be corrected by extracting values of the selected optimal features from the image, using the predictor to predict a desired exposure correction for the image, and correcting the exposure of the image by the predicted desired amount. Exposure correction is based on a model that relates intensity of light in the world to the RGB digits of the digital image. The model comprises a gamma function that models the response of a typical monitor and a S-shaped curve that compresses the large dynamic range of the world to the small dynamic range of the RGB digit space.

3. 发明授权

EP0768001B1 IMAGE RENDERING SYSTEM AND METHOD FOR GENERATING STOCHASTIC THRESHOLD ARRAY(S) FOR USE THEREWITH 失效
标题翻译：图像位置的系统和方法用于生成随机规则字段
公开(公告)号：EP0768001B1
公开(公告)日：2002-05-02
申请号：EP96910553.5
申请日：1996-03-22
申请人： POLAROID CORPORATION
发明人： KOLPATZIK, Bernd, W. , THORNTON, Jay, E.
IPC分类号： H04N1/40
CPC分类号： H04N1/4051
摘要： An image rendering system, for generating discrete tone image data representing a continuous-tone image for rendering by a rendering device, the image rendering system includes a stochastic threshold array generating arrangement and an image data processing section. The stochastic threshold array generating arrangement generates a plurality of stochastic threshold arrays from a random seed pattern that have been subsequently optimized to reduce image artifacts in the rendering of tones. Each pattern is optimized to reflect (i) a selected trade-off between grain and possible mottle in the rendered image, (ii) distortions introduced by the rendering device in rendering an image defined by the pattern and an observer in viewing the image, and (iii) boundary effects so that the patterns, when tiled together, have optimal visual characteristics proximate their respective edges. The image data processing section processes the continuous tone image data in relation to the stochastic threshold arrays generated by the stochastic threshold array generating arrangement. The image data processing section may be used to either randomly tile, or tile in an ordered way, the stochastic threshold arrays over the continuous-tone image data and generates the discrete tone image data in response to correspondingly positioned pixels of the continuous-tone image data and threshold values of the stochastic threshold arrays.

4. 发明公开

EP1393544A1 RENDERING IMAGES UTILIZING ADAPTIVE ERROR DIFFUSION 有权
标题翻译：图像再现BY自适应误差扩散
公开(公告)号：EP1393544A1
公开(公告)日：2004-03-03
申请号：EP02739836.1
申请日：2002-05-17
申请人： POLAROID CORPORATION
发明人： GORIAN, Izrail, S. , THORNTON, Jay, E. , PINEAU, Richard, A.
IPC分类号： H04N1/405
CPC分类号： H04N1/4053
摘要： An adaptive halftoning method where the difference between a digital image and a filtered image is introduced into the system on a pixel by pixel basis is disclosed. In this method, each input difference pixel has a corresponding error value of the previous pixel added to the input value at a summing node, resulting in modified image difference data; the modified image difference data is passed to a threshold comparator where the modified image difference data is compared to a threshold value, the threshold value varying according to the properties of the digital image, to determine the appropriate output level; the output level is subtracted from the modified image difference value to produce the input to an error filter; the output of the error filter is multiplied by an adaptation coefficient, where the adaptation coefficient varies according to the properties of the digital image, to generate the error level for the subsequent input pixel; and, the cyclical processing of pixels is continued until the end of the input data is reached.

5. 发明公开

EP1392514A2 A HIGH SPEED PHOTO-PRINTING APPARATUS 有权
标题翻译：高速摄影UNIT
公开(公告)号：EP1392514A2
公开(公告)日：2004-03-03
申请号：EP02739274.5
申请日：2002-05-16
申请人： POLAROID CORPORATION
发明人： BOUCHARD, Alain , BUSCH, Brian, D. , BYBELL, Daniel, P. , DEYOUNG, Anemarie , LAWRENCE, Sandra, B. , REISCH, Michael, L. , SAQUIB, Suhail, S. , SCHUH, Dana, F. , TELFER, Stephen, J. , THORNTON, Jay, E. , VETTERLING, William, T. , VIOLA, Michael, S.
IPC分类号： B41J2/36 , H04N1/00 , G07F17/26
CPC分类号： B41J2/3555 , B41J2/325 , B41J2/36 , G07F17/26 , H04N1/00132 , H04N1/00167 , H04N1/00169 , H04N1/00188
摘要： A thermal printer is disclosed which includes a plurality of thermal print heads, each of the plurality of thermal print heads being operable to print a distinct one of a plurality of colors. The plurality of thermal print heads may print output at a plurality of spatial resolutions. The thermal printer may include dot size varying perceived levels of color printed by the thermal printer by varying sizes of dots printed by the plurality of thermal print heads. The printer may perform various image processing steps on an image to be printed, such as tone scale adjustment, thermal history control, and common mode voltage correction, to improve the perceived quality of the printed image. The thermal printer may be incorporated into a digital photo-printing vending machine for printing images provided by a customer.

6. 发明公开

EP0768001A1 IMAGE RENDERING SYSTEM AND METHOD FOR GENERATING STOCHASTIC THRESHOLD ARRAY(S) FOR USE THEREWITH 失效
标题翻译：图像位置的系统和方法用于生成随机规则字段
公开(公告)号：EP0768001A1
公开(公告)日：1997-04-16
申请号：EP96910553.0
申请日：1996-03-22
申请人： POLAROID CORPORATION
发明人： KOLPATZIK, Bernd, W. , THORNTON, Jay, E.
IPC分类号： B41J2 , G06T5 , H04N1
CPC分类号： H04N1/4051
摘要： An image rendering system, for generating discrete tone image data representing a continuous-tone image for rendering by a rendering device, the image rendering system includes a stochastic threshold array generating arrangement and an image data processing section. The stochastic threshold array generating arrangement generates a plurality of stochastic threshold arrays from a random seed pattern that have been subsequently optimized to reduce image artifacts in the rendering of tones. Each pattern is optimized to reflect (i) a selected trade-off between grain and possible mottle in the rendered image, (ii) distortions introduced by the rendering device in rendering an image defined by the pattern and an observer in viewing the image, and (iii) boundary effects so that the patterns, when tiled together, have optimal visual characteristics proximate their respective edges. The image data processing section processes the continuous tone image data in relation to the stochastic threshold arrays generated by the stochastic threshold array generating arrangement. The image data processing section may be used to either randomly tile, or tile in an ordered way, the stochastic threshold arrays over the continuous-tone image data and generates the discrete tone image data in response to correspondingly positioned pixels of the continuous-tone image data and threshold values of the stochastic threshold arrays.

7. 发明公开

EP1399318A1 THERMAL IMAGING SYSTEM 有权
标题翻译：热像系统
公开(公告)号：EP1399318A1
公开(公告)日：2004-03-24
申请号：EP02751985.9
申请日：2002-05-20
申请人： Polaroid Corporation
发明人： BHATT, Jayprakash, C. , BUSCH, Brian, D. , BYBELL, Daniel, P. , COTTRELL, F., Richard , DEYOUNG, Anemarie , LIU, Chien , TELFER, Stephen, J. , THORNTON, Jay, E. , VETTERLING, William, T.
IPC分类号： B41M5/34 , B41J2/36 , G03C1/52
CPC分类号： B41J2/32 , B41J2/36 , B41M5/3275 , B41M5/3335 , B41M5/3336 , B41M5/34 , B41M5/40 , B41M5/42 , B41M5/426 , B41M5/44 , B41M2205/04 , B41M2205/38 , G03C1/52
摘要： A multicolor imaging system is described wherein at least two, and preferably three, different image-forming layers of a thermal imaging member are addressed at least partially independantly by a thermal printhead or printheads from the same surface of the imaging member by controlling the temperature of the thermal printhead(s) and the time thermal energy is applied to the image-forming layers. Each color of the thermal imaging member can be printed alone or in selectable proportion to the other color(s). Novel thermal imaging members are also described.

8. 发明授权

EP0824822B1 MULTIPLE DENSITY LEVEL STOCHASTIC SCREENING SYSTEM AND METHOD 失效
标题翻译：系统和方法提供多级密度随机加网
公开(公告)号：EP0824822B1
公开(公告)日：2004-01-28
申请号：EP96911746.4
申请日：1996-04-12
申请人： Polaroid Corporation
发明人： THORNTON, Jay, E.
IPC分类号： H04N1/52 , H04N1/40
CPC分类号： H04N1/648 , H04N1/40087
摘要： An image rendering system for generating discrete tone image data for representing continuous tone image data to be rendered by a rendering device. The continuous tone image data includes a plurality of pixel values each associated with a pixel. The rendering device renders a colorant in a plurality of colorant densities. The image rendering system comprises a threshold array, preferably stochastic, a colorant density array (27, 62), and a colorant density supply arrangement. The threshold array comprising a plurality of threshold values. The colorant density array comprises a plurality of array elements, each associated with one of said pixel values and one of said threshold values. Each of the array elements identifies a particular one of a plurality of colorant density values each associated with one of the colorant densities rendered by said rendering device. The colorant density supply arrangement, for each pixel, uses the pixel value associated with the pixel and a threshold value from the threshold array to identify an array element of the colorant density array (27, 62), whose colorant density value will be rendered by the rendering device.

9. 发明公开

EP1374557A2 DIGITAL HALFTONING 审中-公开
标题翻译：数字半色调
公开(公告)号：EP1374557A2
公开(公告)日：2004-01-02
申请号：EP02719326.7
申请日：2002-03-21
申请人： POLAROID CORPORATION
发明人： BYBELL, Daniel, P. , THORNTON, Jay, E. , SCHUH, Dana, F.
IPC分类号： H04N1/40
CPC分类号： H04N1/4056
摘要： In one aspect of the present invention, a method is provided for producing a halftone of a source image. The halftone includes halftone pixels. The halftone pixels are suitable for containing halftone dots. The method selects glyphs corresponding to intensities of regions (e.g., pixels) in the source image. The glyphs contain one or more halftone dots. The method located halftone dots within the halftone pixels such that for at least one pair of halftone dots contained within a pair of halftone pixels sharing a common boundary, the halftone dots in the pair of halftone pixels extend in opposite directions form the common boundary.

10. 发明公开

EP0824822A1 MULTIPLE DENSITY LEVEL STOCHASTIC SCREENING SYSTEM AND METHOD 失效
标题翻译：系统和方法提供多级密度随机加网
公开(公告)号：EP0824822A1
公开(公告)日：1998-02-25
申请号：EP96911746.0
申请日：1996-04-12
申请人： POLAROID CORPORATION
发明人： THORNTON, Jay, E.
IPC分类号： H04N1
CPC分类号： H04N1/648 , H04N1/40087
摘要： An image rendering system for generating discrete tone image data for representing continuous tone image data to be rendered by a rendering device. The continuous tone image data includes a plurality of pixel values each associated with a pixel. The rendering device renders a colorant in a plurality of colorant densities. The image rendering system comprises a threshold array, preferably stochastic, a colorant density array (27, 62), and a colorant density supply arrangement. The threshold array comprising a plurality of threshold values. The colorant density array comprises a plurality of array elements, each associated with one of said pixel values and one of said threshold values. Each of the array elements identifies a particular one of a plurality of colorant density values each associated with one of the colorant densities rendered by said rendering device. The colorant density supply arrangement, for each pixel, uses the pixel value associated with the pixel and a threshold value from the threshold array to identify an array element of the colorant density array (27, 62), whose colorant density value will be rendered by the rendering device.

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