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1.发明公开Method and apparatus for converting floating-point pixel values to byte pixel values by table lookup 失效用于转换浮点像素值的方法和装置通过表查找来计算像素值
公开(公告)号：EP0578950A3
公开(公告)日：1995-11-22
申请号：EP93108197.0
申请日：1993-05-19
发明人： Lucas, Bruce David
CPC分类号： H03M7/24
摘要： The invention provides a method of generating a value of a pixel, and apparatus for accomplishing the method. The method includes the steps of (a) providing a floating-point representation of a pixel value; and (b) applying the floating-point representation as an index into a lookup table, the lookup table including a memory device having a plurality of entries. Each of the entries is uniquely indexed by one value of a floating-point representation of a pixel value, and each of the entries stores a corresponding integer representation of the pixel value. A third step (c) outputs from the lookup table the integer representation of the pixel value that corresponds to the applied floating-point representation. It is shown that only a sub-set of the entire floating-point representation need be employed as a table index value. In the presently preferred embodiment of the invention, only 16 bits of a 32-bit single-precision floating-point value are shown to be relevant to the result; specifically the sign bit, the exponent, and a portion of the mantissa.
摘要翻译： 本发明提供一种产生像素值的方法，以及用于完成该方法的装置。 该方法包括以下步骤：（a）提供像素值的浮点表示; 以及（b）将所述浮点表示作为索引应用到查找表中，所述查找表包括具有多个条目的存储器件。 每个条目由像素值的浮点表示的一个值唯一地索引，并且每个条目存储像素值的相应整数表示。 第三步（c）从查找表输出与应用的浮点表示相对应的像素值的整数表示。 示出了仅需要使用整个浮点表示的子集作为表索引值。 在本发明的当前优选实施例中，仅显示32位单精度浮点值的16位与结果相关; 特别是符号位，指数和尾数的一部分。
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2.发明公开Method and apparatus for drawing lines, curves, and points coincident with a surface 失效用于绘制与曲面重合的线条，曲线和点的方法和设备
公开(公告)号：EP0582815A3
公开(公告)日：1994-05-04
申请号：EP93109940.2
申请日：1993-06-22
IPC分类号： G06F15/72
CPC分类号： G06T15/405
摘要： A method, for execution by a graphics processing system (10), for rendering objects for display to a viewer upon a display (20) having a plurality of display pixels. The method includes the steps of, for a surface to be displayed having a surface marking coincident therewith, (a) moving the surface marking towards the viewer or, alternatively, moving the surface away from the viewer, by an amount that is function of a parameter (S) and also a scale factor (K) that expresses a relationship between viewer eye coordinate units and display pixel units. The parameter (S) determines a maximum slope for the surface, relative to a viewing plane, such that the step of moving will not cause a portion of the surface marking to be obscured by the surface. The step of moving includes a step of (b) applying a predetermined transformation T' e from a viewer eye coordinate system to a modified viewer eye coordinate system. The predetermined transformation T' e is selected as a function of whether a perspective projection or an orthographic projection of the surface and surface marking upon a viewing plane is performed. For the perspective projection, the transformation T' e is shown to also compensate for the movement of the second object towards the viewer.
摘要翻译： 一种用于由图形处理系统（10）执行的方法，用于在具有多个显示像素的显示器（20）上呈现用于向观看者显示的对象。 该方法包括以下步骤：对于要显示的表面具有与其一致的表面标记，（a）将表面标记朝向观察者移动，或者可选地使表面远离观察者移动一定量，该量是 参数（S）以及表示观看者眼睛坐标单位和显示像素单位之间的关系的比例因子（K）。 参数（S）确定表面相对于观察平面的最大斜率，使得移动步骤不会导致表面标记的一部分被表面遮挡。 移动步骤包括步骤：（b）将预定变换T'e从观察者眼睛坐标系施加到修改的观察者眼睛坐标系。 预定变换T'e根据是否执行观看平面上的表面和表面标记的透视投影或正投影来选择。 对于透视投影，变换T'e被示出为还补偿了第二物体朝观察者的移动。
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3.发明公开Apparatus and method for compressing and expanding multibit digital pixel data 失效用于压缩和扩展多位数字像素数据的装置和方法
公开(公告)号：EP0445388A3
公开(公告)日：1992-08-05
申请号：EP90123518.4
申请日：1990-12-07
CPC分类号： H04N9/64 , G09G5/02 , H04N9/8042
摘要： Method and apparatus for converting multibit pixel data to a lesser number of bit pixel data and re-expanding the compressed data. Luminance data for each pixel is established as the 5 most significant bits of the original luminance signal. The chrominance information for groups of pixels is subsampled, and a common chrominance value assigned to each of the pixels in a group. The resulting compressed pixels may be 8 bits wide providing economical possibilities to store the 8 bit wide data. The data is expanded for display by adding lower order data bits to the compressed luminance signal data bits. A subsampled chrominance data signal is appended to the expanded luminance data for display.
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公开(公告)号：EP0359080A2
公开(公告)日：1990-03-21
申请号：EP89116265.3
申请日：1989-09-02
IPC分类号： G09G1/28
CPC分类号： H04N1/648 , G09G3/2051 , G09G5/02
摘要： A color display device which includes dither apparatus for each primary color to be displayed. A dither matrix provides a dither signal output as a function of the position of a pixel on the color display device. An input primary color signal includes an integer signal and a fraction signal. The integer signal is incremented by an incrementer. There is means for providing an output primary color signal which is the incremented signal whenever a predetermined relationship exists between the dither signal and the fraction signal, and which is the integer signal whenever the predetermined relationship does not exist.
摘要翻译： 一种彩色显示装置，其包括用于要显示的每种原色的抖动装置。 抖动矩阵提供作为彩色显示装置上的像素的位置的函数的抖动信号输出。 输入原色信号包括整数信号和分数信号。 整数信号由加法器递增。 存在用于提供输出原色信号的装置，每当在抖动信号和分数信号之间存在预定关系时，其是递增信号，并且每当预定关系不存在时，其是整数信号。
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公开(公告)号：EP0149757A3
公开(公告)日：1988-12-14
申请号：EP84114280
申请日：1984-11-27
CPC分类号： G11C7/1006 , G09G1/02
摘要： The system includes a plurality of digital memory units (20, 22,...50) each for storing a plurality of independently addressable binary bits. The units operate together in response to each common bit address to supply a bit from each unit to form an array of bits for a discrete section of a larger array. The units are interconnected through common interconnection buses (e.g. 128, 140) and selective controls (134, 136) to input and output gate connections (e.g. 126, 138) to those buses to provide for selective shifting of bits between units to change the bit array.
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6.发明公开Method and apparatus for drawing lines, curves, and points coincident with a surface 失效用于绘制oberflächenkoinzidierenden线，曲线和点的方法和装置。
公开(公告)号：EP0582815A2
公开(公告)日：1994-02-16
申请号：EP93109940.2
申请日：1993-06-22
IPC分类号： G06F15/72
CPC分类号： G06T15/405
摘要： A method, for execution by a graphics processing system (10), for rendering objects for display to a viewer upon a display (20) having a plurality of display pixels. The method includes the steps of, for a surface to be displayed having a surface marking coincident therewith, (a) moving the surface marking towards the viewer or, alternatively, moving the surface away from the viewer, by an amount that is function of a parameter (S) and also a scale factor (K) that expresses a relationship between viewer eye coordinate units and display pixel units. The parameter (S) determines a maximum slope for the surface, relative to a viewing plane, such that the step of moving will not cause a portion of the surface marking to be obscured by the surface. The step of moving includes a step of (b) applying a predetermined transformation T' e from a viewer eye coordinate system to a modified viewer eye coordinate system. The predetermined transformation T' e is selected as a function of whether a perspective projection or an orthographic projection of the surface and surface marking upon a viewing plane is performed. For the perspective projection, the transformation T' e is shown to also compensate for the movement of the second object towards the viewer.
摘要翻译： 一种方法，用于通过用于在具有显示像素的多个显示器（20），用于呈现显示对象观看者的图形处理系统（10）执行。 该方法包括以下步骤：对于具有标记重合那里与一个表面，（a）使所述表面朝向观察者标记或者，可选地，在量从观察者移动表面离开，通过确实显示的表面是的函数 参数（S），因此比例因子（K）没有快车坐标单元和显示像素单元观看者眼睛之间的关系。 bestimmt用于表面的最大斜率的参数（S），相对于观看平面，并检测移动的步骤不会造成表面标记，以通过表面被遮蔽的部分。 移动的步骤包括从一个观看者眼睛施加预定的变换T'e坐标系到修改的观看者眼睛坐标系统的步骤（b）。预定T'e变换被选择的一个函数无论是透视投影或在 进行表面和表面，在观看平面标记的正投影。 为透视投影，变换T'e被示出，从而补偿朝向观察者第二对象的移动。
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公开(公告)号：EP0149757B1
公开(公告)日：1992-01-22
申请号：EP84114280.5
申请日：1984-11-27
CPC分类号： G11C7/1006 , G09G1/02
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8.发明公开Apparatus and method for compressing and expanding multibit digital pixel data 失效Vorrichtung und Verfahren zur Kompression und Expansion von digitalen Multibit-Pixeldaten。
公开(公告)号：EP0445388A2
公开(公告)日：1991-09-11
申请号：EP90123518.4
申请日：1990-12-07
CPC分类号： H04N9/64 , G09G5/02 , H04N9/8042
摘要： Method and apparatus for converting multibit pixel data to a lesser number of bit pixel data and re-expanding the compressed data. Luminance data for each pixel is established as the 5 most significant bits of the original luminance signal. The chrominance information for groups of pixels is subsampled, and a common chrominance value assigned to each of the pixels in a group. The resulting compressed pixels may be 8 bits wide providing economical possibilities to store the 8 bit wide data. The data is expanded for display by adding lower order data bits to the compressed luminance signal data bits. A subsampled chrominance data signal is appended to the expanded luminance data for display.
摘要翻译： 用于将多位像素数据转换为较少数量的位像素数据并重新扩展压缩数据的方法和装置。 每个像素的亮度数据被建立为原始亮度信号的5个最高有效位。 对像素组的色度信息进行二次采样，并分配给组中的每个像素的公共色度值。 所得到的压缩像素可以是8位宽，为经济的可能性存储8位宽的数据。 通过向压缩的亮度信号数据位添加低阶数据位来扩展数据以进行显示。 将子采样色度数据信号附加到扩展亮度数据以进行显示。
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公开(公告)号：EP0214547A2
公开(公告)日：1987-03-18
申请号：EP86111769.5
申请日：1986-08-26
发明人： Gupta, Satish , Lucas, Bruce David
摘要： A method for improving the viewing quality of a CRT display image without increasing resolution of the display. With the invention disclosed herein, characters are apparently positioned at sub-pixel locations to improve the viewing quality of a CRT display image. This apparent positioning is accomplished by changing intensity values assigned to pixels on a CRT display. In the preferred embodiment, the change in intensity values is effected by linear interpolation with intensity values of neighbouring pixels to yield second intensity values. These second intensity values, then, improve the viewing quality of the CRT display image.
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10.发明公开Method and apparatus for converting floating-point pixel values to byte pixel values by table lookup 失效方法和装置用于在Umsetzuung使用查找表的一个字节的像素值的浮点像素值。
公开(公告)号：EP0578950A2
公开(公告)日：1994-01-19
申请号：EP93108197.0
申请日：1993-05-19
发明人： Lucas, Bruce David
CPC分类号： H03M7/24
摘要： The invention provides a method of generating a value of a pixel, and apparatus for accomplishing the method. The method includes the steps of (a) providing a floating-point representation of a pixel value; and (b) applying the floating-point representation as an index into a lookup table, the lookup table including a memory device having a plurality of entries. Each of the entries is uniquely indexed by one value of a floating-point representation of a pixel value, and each of the entries stores a corresponding integer representation of the pixel value. A third step (c) outputs from the lookup table the integer representation of the pixel value that corresponds to the applied floating-point representation.
It is shown that only a sub-set of the entire floating-point representation need be employed as a table index value. In the presently preferred embodiment of the invention, only 16 bits of a 32-bit single-precision floating-point value are shown to be relevant to the result; specifically the sign bit, the exponent, and a portion of the mantissa.摘要翻译： 本发明提供了生成用于实现该方法的一个像素的值，以及装置的方法。 该方法包括：（a）提供的像素值的浮点表示的工序; 和（b）将所述浮点表示为索引到查找表，所述查找表包括：具有入口的多个A存储器设备。 每个条目具有唯一的像素值的浮点表示的一个值索引，并且每个条目的存储的像素值中的对应的整数表示。 第三步骤（c）输出从查找表中的像素值的整数表示没有对应于应用浮点表示。 它被示出并仅在整个浮点表示的子集需要被用作表索引值。 在本发明的当前优选实施方式中，只有16个32位单精度浮点值的比特被示出为相关的结果; 具体地，符号位，指数和尾数的一部分。
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