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1. 发明专利

AU2002316067A1 Methods, systems, and programming for producing and displaying subpixel-optimized font bitmaps using non-linear color balancing 未知
公开(公告)号：AU2002316067A1
公开(公告)日：2002-11-11
申请号：AU2002316067
申请日：2002-05-02
申请人： BITSTREAM INC
发明人： KAASILA SAMPO J , COLLINS JOHN S
IPC分类号： G06T1/00 , G06F3/048 , G06F3/14 , G06F15/00 , G06F17/30 , G06T3/40 , G06T11/20 , G06T11/40 , G06T11/60 , G09G3/20 , G09G3/36 , G09G5/00 , G09G5/02 , G09G5/26 , G09G5/28 , G09G5/34 , G09G5/36 , G09G5/38 , G09G5/391 , H04M1/725 , H04N1/387 , H04N1/393 , H04N1/46 , H04N1/60 , G09G5/06
摘要： The invention relates to methods, systems, and programming for producing and drawing subpixel-optimized bitmap images of shapes, such as fonts, by using non-linear color balancing. Some embodiments associate a luminosity with each subpixel of such an image as a function of (a) the percent of the subpixel's area covered by the shape and (b) the distribution to nearby subpixels of portions of the subpixel's resulting coverage value that cause color imbalance. Some embodiments distribute a subpixel's coverage value as a function of its difference from coverage values of other subpixels in the same pixel. Some embodiments draw a image comprised of pure foreground and background color pixels, as well as intermediary pixels in which subpixels are determined as a function of both foreground and background colors and color balancing. The intermediary pixels can, but need not, separate the foreground and background pixels along the direction of color balancing.

2. 发明专利

AU6527400A System for rapidly performing scan conversion with anti-aliasing upon outline fonts and other graphic elements 未知
公开(公告)号：AU6527400A
公开(公告)日：2001-02-19
申请号：AU6527400
申请日：2000-07-31
申请人： BITSTREAM INC
发明人： KAASILA SAMPO J
IPC分类号： G06T3/40 , G06T15/50 , G09G5/24 , G09G5/28 , G09G5/36
摘要： A system rapidly rasterizes high resolution shapes, such as outline fonts, for use in a lower resolution pixel image. For individual pixels a line coverage value is determined for each of at least two sampling lines running in different directions, such as at right angles, within the pixel. The pixel's line coverage value for each line is a function of the degree to which the line is covered by any shapes within the pixel. Then a coverage value is determined for the pixel, itself, as a non-linear function of it's one or more line coverage values running in each of the different directions. Commonly the non-linear function causes the pixel's coverage value to vary more rapidly with variations in the line coverage value of that one of its sampling line which is closest to being half covered within the pixel. Such rasterization can be performed even more rapidly by using two passes, a first which calculates a pixel coverage value for all pixels as a function of the coverage within each pixel of one or more lines of the first set of parallel lines which run in a first direction, and a second pass which varies the pixel coverage value set in the first pass only if there is an intersection between the outline of a shape being rendered and a one or more lines of the second set of parallel lines which run in a second direction.

3. 发明专利

DE60019934D1 未知
公开(公告)号：DE60019934D1
公开(公告)日：2005-06-09
申请号：DE60019934
申请日：2000-07-31
申请人： BITSTREAM INC
发明人： KAASILA J
IPC分类号： G06T3/40 , G06T15/50 , G09G5/24 , G09G5/28 , G09G5/36
摘要： A system rapidly rasterizes high resolution shapes, such as outline fonts, for use in a lower resolution pixel image. For individual pixels a line coverage value is determined for each of at least two sampling lines running in different directions, such as at right angles, within the pixel. The pixel's line coverage value for each line is a function of the degree to which the line is covered by any shapes within the pixel. Then a coverage value is determined for the pixel, itself, as a non-linear function of it's one or more line coverage values running in each of the different directions. Commonly the non-linear function causes the pixel's coverage value to vary more rapidly with variations in the line coverage value of that one of its sampling line which is closest to being half covered within the pixel. Such rasterization can be performed even more rapidly by using two passes, a first which calculates a pixel coverage value for all pixels as a function of the coverage within each pixel of one or more lines of the first set of parallel lines which run in a first direction, and a second pass which varies the pixel coverage value set in the first pass only if there is an intersection between the outline of a shape being rendered and a one or more lines of the second set of parallel lines which run in a second direction.

4. 发明专利

GB9711959D0 Apparatus and methods for creating and using portable fonts 未知
公开(公告)号：GB9711959D0
公开(公告)日：1997-08-06
申请号：GB9711959
申请日：1997-06-10
申请人： BITSTREAM INC
IPC分类号： B41J2/485 , G06F17/21 , G06F17/22 , G06T11/20 , G09G5/24
摘要： A computer system includes a requesting computer which asks a responding computer, such as an Internet server, for one or more portions of text. The responding computer reacts by sending the requested text. The requesting computer can either render the requested text without the text's font shapes, or it can ask the responding computer to send descriptions of such shapes, and then render the text using them. Preferably the font descriptions sent are grouped into sets, or portable font resources ("PFR"); each text sent identifies the one or more PFRs needed to define its font shapes; and the requesting computer asks for PFRs identified in texts it receives. The fonts and characters within fonts represented by each PFR vary as a function of its associated text. For each character to be rendered, the requesting computer finds which PFR associated with the character's text describes its shape, and uses that font description to render that shape. The responding computer can install such new font descriptions into its operating system, so character shapes can be rapidly rendered by standard operating system calls. The responding computer can translate a text's pre-defined font description into new font descriptions which depend only on character-font shapes. The responding computer can receive a changed body of text and a corresponding old set of PFRs, and derive a new set of one or more PFRs as a function of which character-font shapes occur in the changed text.

5. 发明专利

CA2191332A1 APPARATUS AND METHODS FOR CREATING AND USING PORTABLE FONTS 未知
公开(公告)号：CA2191332A1
公开(公告)日：1995-12-07
申请号：CA2191332
申请日：1995-05-24
申请人： BITSTREAM INC
发明人： GOLDWATER MARK H , COLLINS JOHN S
IPC分类号： B41J2/485 , G06F17/21 , G06F17/22 , G06T11/20 , G09G5/24
摘要： A computerized system inputs fonted text and outputs corresponding fonted text containing new, automatically created, font descriptions. The new font descriptions make the output a portable document which can be rendered at any magnification by a machine of any output resolution, even if that machine does do not have access to the pre-defined font descriptions associated with the original input text. The system creates the portable document by accessing the pre-defined font descriptions of each character-font shape in the input text and generating new font descriptions which describe those shapes in a new font description language. Preferably the system findspoints on the outlines of each character-font shape which are a function of the shape itself, rather than how its pre-defined description describes that shape. The system bases the segmentation of the new font description on such description-independent points. Once created, the portable document can be rendered on the computer or printer generating it or a computer or printer receiving the document over a network or on mass storage media. In some embodiments, the computer viewing the portable document determines whether can access and render the pre-defined font description of each character in the portable document. If so, it does so. If not, it interprets the shape of the character from its new font description in the portable document.

6. 发明专利

CA2030533A1 METHOD AND APPARATUS FOR CONVERSION OF OUTLINE CHARACTERS TO BITMAP CHARACTERS 未知
公开(公告)号：CA2030533A1
公开(公告)日：1990-10-01
申请号：CA2030533
申请日：1990-02-22
申请人： BITSTREAM INC
发明人： COLLINS JOHN S , YUDIS MICHAEL B , APLEY PHILLIP G
IPC分类号： B41J2/485 , B41J5/44 , G09G1/14 , G09G5/00 , G09G5/26 , G09G5/36 , G06F3/14 , G09G5/24
摘要： 2030533 9012386 PCTABS00002 An outline representation of a character or symbol is treated as being composed of a set of zones formed in both the horizontal and vertical directions. The zones are completely character-specific. Each zone defines the extent of some feature of the character. The boundaries of the zones are mapped to specific pixel locations in a bitmap em-square of selected resolution and size. Additional interpolation zones are defined which are used to map all the points on the outline representation of the character that are contained within the interpolation zone, but do not coincide with a control edge, from the positions in the high-resolution em-square to a corrresponding position in the low-resolution em-square. To maintain relationships between features, constraint functions may be defined which regulate the size of the control zones for a character at predetermined sizes. Control zones and interpolation zones are all derivatively linked to a basic set of horizontal and vertical control edges at the outline description level. Consequently, the number of computations needed is reduced and the speed with which a bitmap can be generated from the outline representation is increased.

7. 发明申请

WO02088908A3 METHODS, SYSTEMS, AND PROGRAMMING FOR PRODUCING AND DISPLAYING SUBPIXEL-OPTIMIZED FONT BITMAPS USING NON-LINEAR COLOR BALANCING 审中-公开
标题翻译：使用非线性色彩平衡生产和显示SUBPIXEL优化的字体位置的方法，系统和编程
公开(公告)号：WO02088908A3
公开(公告)日：2003-04-03
申请号：PCT/US0214282
申请日：2002-05-02
申请人： BITSTREAM INC , KAASILA SAMPO J , COLLINS JOHN S
发明人： KAASILA SAMPO J , COLLINS JOHN S
IPC分类号： G06T1/00 , G06F3/048 , G06F3/14 , G06F15/00 , G06F17/30 , G06T3/40 , G06T11/20 , G06T11/40 , G06T11/60 , G09G3/20 , G09G3/36 , G09G5/00 , G09G5/02 , G09G5/26 , G09G5/28 , G09G5/34 , G09G5/36 , G09G5/38 , G09G5/391 , H04M1/725 , H04N1/387 , H04N1/393 , H04N1/46 , H04N1/60 , G09G5/06
CPC分类号： G09G5/28 , G06F3/0481 , G06F3/0488 , G06F3/14 , G06F17/30905 , G06T11/203 , G06T11/40 , G06T2200/12 , G09G3/2003 , G09G5/00 , G09G5/026 , G09G5/24 , G09G5/34 , G09G5/42 , G09G2320/0606 , G09G2340/0407 , G09G2340/0414 , G09G2340/0421 , G09G2340/045 , G09G2340/0457 , G09G2340/0492 , G09G2340/145 , G09G2370/027 , H04M1/72561
摘要： A method of producing a sub pixel resolution representation of a shape suitable for display on a sub pixel addressed screen. The method comprises producing a scaled sub pixel optimized image of a bitmap image by associating a luminosity value with each sub pixel of the scaled image as a function of the percent of the area of the sub pixel's area in the image that is covered by the shape and a color balancing function designed to distribute a portion of a sub pixel's luminosity value that otherwise would cause color imbalance to nearby sub pixels of different colors. The percent of a sub pixel's luminosity values that is so distributed is a function of the percent of the sub pixel's luminosity value, which causes color imbalance. An advantage is that it reduces the amount of luminosity value distributed for color balance purposes to approximately only that amount which is necessary to achieve color balance, and increases the clarity of sub pixel optimized images.
摘要翻译：一种产生适于在子像素寻址屏幕上显示的形状的子像素分辨率表示的方法。该方法包括通过将亮度值与缩放图像的每个子像素相关联来产生位图图像的缩放的子像素优化图像，作为被形状覆盖的图像中的子像素区域的百分比的函数以及设计用于分配子像素的亮度值的一部分的颜色平衡功能，否则将导致颜色不平衡到不同颜色的附近子像素。如此分布的子像素的亮度值的百分比是子像素的亮度值的百分比的函数，这导致颜色不平衡。一个优点是，它将色彩平衡目的分配的亮度值的量减少到仅实现色彩平衡所需的量，并且增加了子像素优化图像的清晰度。

8. 发明申请

WO2002088908A2 METHODS, SYSTEMS, AND PROGRAMMING FOR PRODUCING AND DISPLAYING SUBPIXEL-OPTIMIZED FONT BITMAPS USING NON-LINEAR COLOR BALANCING 审中-公开
标题翻译：使用非线性色彩平衡生产和显示SUBPIXEL优化的字体位置的方法，系统和编程
公开(公告)号：WO2002088908A2
公开(公告)日：2002-11-07
申请号：PCT/US2002/014282
申请日：2002-05-02
申请人： BITSTREAM INC. , KAASILA, Sampo, J. , COLLINS, John, S.
发明人： KAASILA, Sampo, J. , COLLINS, John, S.
IPC分类号： G06F
CPC分类号： G09G5/28 , G06F3/0481 , G06F3/0488 , G06F3/14 , G06F17/30905 , G06T11/203 , G06T11/40 , G06T2200/12 , G09G3/2003 , G09G5/00 , G09G5/026 , G09G5/24 , G09G5/34 , G09G5/42 , G09G2320/0606 , G09G2340/0407 , G09G2340/0414 , G09G2340/0421 , G09G2340/045 , G09G2340/0457 , G09G2340/0492 , G09G2340/145 , G09G2370/027 , H04M1/72561
摘要： The invention relates to methods, systems, and programming for producing and drawing subpixel-optimized bitmap images of shapes, such as fonts, by using non-linear color balancing. Some embodiments associate a luminosity with each subpixel of such an image as a function of (a) the percent f the subpixel's area covered by the shape and (b) the distribution to nearby subpixels of portions of the subpixel's resulting coverage value that cause color imbalance. Some embodiments distribute a subpixel's coverage value as a function of its difference from coverage values of other subpixels in the same pixel. Some embodiments draw a image comprised of pure foreground and background color pixels, as well as intermediary pixels in which subpixels are determined as a function of both foreground and background colors and color balancing. The intermediary pixels can, but need not, separate the foreground and background pixels along thh direction of color balancing.
摘要翻译：一种产生适于在子像素寻址屏幕上显示的形状的子像素分辨率表示的方法。该方法包括通过将亮度值与缩放图像的每个子像素相关联来产生位图图像的缩放的子像素优化图像，作为被形状覆盖的图像中的子像素区域的百分比的函数以及设计用于分配子像素的亮度值的一部分的颜色平衡功能，否则将导致颜色不平衡到不同颜色的附近子像素。如此分布的子像素的亮度值的百分比是子像素的亮度值的百分比的函数，这导致颜色不平衡。一个优点是，它将色彩平衡目的分配的亮度值的量减少到仅实现色彩平衡所需的量，并且增加了子像素优化图像的清晰度。

9. 发明专利

DE60235540D1 未知
公开(公告)号：DE60235540D1
公开(公告)日：2010-04-15
申请号：DE60235540
申请日：2002-05-02
申请人： BITSTREAM INC
发明人： KAASILA SAMPO J , COLLINS JOHN S
IPC分类号： G06F1/00

10. 发明专利

AU2003298825A8 Innovations for the display of web pages 未知
公开(公告)号：AU2003298825A8
公开(公告)日：2004-06-23
申请号：AU2003298825
申请日：2003-12-03
申请人： BITSTREAM INC
发明人： PORTER EDWARD W , KAASILA SAMPO J
IPC分类号： G06F17/30 , G09G5/00 , G09G5/38 , G06F3/00

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