公开(公告)号：EP1580694A1

公开(公告)日：2005-09-28

申请号：EP04006823.1

申请日：2004-03-22

Applicant: STMicroelectronics S.r.l.

Inventor： Gardella, Pierluigi ,  Barone, Massimiliano ,  Gallizio, Edoardo ,  Pau, Danilo

IPC: G06T11/40

CPC classification number: G06T11/40

Abstract: A system for rendering a primitive of an image to be displayed, for instance in a mobile 3D graphic pipeline, the primitive including a set of pixels. The system is configured for:

locating the pixels that fall within the area of the primitive,
generating, for each pixel located in the area, a set of associated sub-pixels,
borrowing a borrowed set of sub-pixels from neighboring pixels,
subjecting the set of associated sub-pixels and the borrowed set of pixels (A, B, C, D) to adaptive filtering to create an adaptively filtered set of sub-pixels (AA, BB, CC, DD), and
subjecting at least the adaptively filtered set of sub-pixels (AA, BB, CC, DD) to further filtering to compute a final pixel adapted for display. Preferably, the set of associated sub-pixels fulfils at least one of the following requirements:

the set includes two associated sub-pixels and
the set includes associated sub-pixels placed on triangle edges.

公开(公告)号：EP1445734A1

公开(公告)日：2004-08-11

申请号：EP03002728.8

申请日：2003-02-06

Applicant: STMicroelectronics S.r.l.

Inventor： Gardella, Pierluigi Michele ,  Barone, Massimiliano ,  Alfonso, Daniele ,  Pau, Danilo Pietro ,  Lavigna, Daniele

IPC: G06T9/00

CPC classification number: G06T9/005

Abstract: A method for texture compressing images having a plurality of color components (R, G, B), includes the step of decomposing the images in sub-blocks each including only one color component. At least one first predictor is defined for each said sub-block and a respective set of prediction differences is computed for each sub-block. Then the prediction differences for each sub block are sorted, and a look-up prediction differences palette is set up by defining therefrom a look-up prediction error palette. A code is associated with each column of the error palette.

Abstract translation: 一种用于对具有多个颜色分量（R，G，B）的图像进行纹理压缩的方法包括在每个仅包括一个颜色分量的子块中分解图像的步骤。 为每个所述子块定义至少一个第一预测器，并为每个子块计算相应的一组预测差异。 然后对每个子块的预测差异进行排序，并且通过定义查找预测误差调色板来建立查找预测差异调色板。 代码与错误调色板的每一列相关联。

公开(公告)号：EP1496704B1

公开(公告)日：2009-01-21

申请号：EP03015269.8

申请日：2003-07-07

Applicant: STMicroelectronics S.r.l.

Inventor： Sirtori, Daniele ,  Pau, Danilo Pietro ,  Gardella, Pierluigi ,  Barone, Massimiliano ,  Falchetto, Mirko

IPC: H04N7/26

CPC classification number: G06T15/005 ,  G06T9/001 ,  H04N19/29 ,  H04N19/31 ,  H04N19/42 ,  H04N19/517 ,  H04N19/537 ,  H04N19/577 ,  H04N19/587

公开(公告)号：EP1566957A1

公开(公告)日：2005-08-24

申请号：EP04425101.5

申请日：2004-02-18

Applicant: STMicroelectronics S.r.l. ,  STMicroelectronics Limited

Inventor： Gardella, Pier Luigi ,  Barone, Massimiliano ,  Sweet, Gary ,  Pau, Danilo ,  Hill, Stephen ,  Goda, Simon

IPC: H04N1/41 ,  H04N1/64 ,  G06T3/40 ,  H04N7/26 ,  G09G5/02

CPC classification number: H04N19/00 ,  G09G3/2051 ,  G09G5/02 ,  H04N1/40087 ,  H04N19/42 ,  H04N19/90

Abstract: A dither matrix is applied to a high-resolution image to compare the value of each of the pixels that compose it with a threshold value of the matrix and to obtain an output value of the matrix (Dither matrix value) from each comparison. To each pixel value (in_value_r) of the image there is applied the algorithm represented by the schematic layout of Figure 7 to obtain the pixel values (Out_r) of a low-resolution image. C 1 -C 5 and n 1 -n 10 are parameters that may be selected by means of predetermined criteria based on comparisons of the low-resolution image, obtained by means of the operations described above, with an equivalent low-resolution image obtained by means of a sample method.

Abstract translation: 将抖动矩阵应用于高分辨率图像，以将构成它的每个像素的值与矩阵的阈值进行比较，并从每个比较中获得矩阵（抖动矩阵值）的输出值。 对于图像的每个像素值（in_value_r），应用由图7的原理图布局表示的算法，以获得低分辨率图像的像素值（Out_r）。 C1-C5和n1-n10是可以通过基于通过上述操作获得的低分辨率图像与通过样本获得的等效低分辨率图像的比较的预定标准来选择的参数 方法。

公开(公告)号：EP1515278A1

公开(公告)日：2005-03-16

申请号：EP03425590.1

申请日：2003-09-11

Applicant: STMicroelectronics S.r.l.

Inventor： Poutet, Bruno ,  Barone, Massimiliano ,  Gardella, Pier Luigi ,  Pau, Danilo

IPC: G06T9/00

CPC classification number: H04N19/90

Abstract: Digital video signals, such as RGB signals, are subjected to processing by ordering the pixels into groups (M) of adjacent pixels (A, B, C, D) and carrying out the operations of:

- i) truncating the respective string of bits, eliminating a given number (n) of least-significant bits, thus generating a respective truncated string;
- ii) adding to the truncated string an integration factor constituted by a power of two of a given order, thus generating a respective integrated string; and
- iii) calculating first and second values of pixel error corresponding to the difference between the respective string and the truncated string and the respective string and the integrated string, respectively.

There is calculated a set of values of global error comprising all the possible combinations of addition of the first and second values of pixel error on the group (M), then locating the value of minimum error in the set of values of global error. Once, in the combination that produces the value of minimum global error, a first and a second number of pixels have been identified whereby the contribution to the value of minimum global error is given by the first value of pixel error and by the second value of pixel error, as a compressed version of the video signals represented by the pixels in the group, there is used a first number of truncated strings and a second number of integrated strings, equal, respectively, to the first number of pixels and to the second number of pixels, with the integrated strings subjected to truncation.

Abstract translation: 数字视频信号（例如RGB信号）通过将像素排列成相邻像素（A，B，C，D）的组（M）进行处理，并执行以下操作：i）截断各个位串 ，消除给定数量（n）个最低有效位，从而产生相应的截断串; - ii）向截断的串中添加由给定次序的两个的幂组成的积分因子，从而生成相应的集成串; 以及 - iii）分别计算与各个字符串和截断的字符串以及相应的字符串和集成字符串之间的差分对应的像素误差的第一和第二值。 计算出一组全局误差的值，包括在组（M）上的像素误差的第一和第二值的相加的所有可能组合，然后将最小误差的值定位在 全局错误。 一旦产生最小全局误差的值的组合中，已经识别出第一和第二数量的像素，由此对最小全局误差值的贡献由像素误差的第一值和第 作为由组中的像素表示的视频信号的压缩版本的像素误差，分别使用第一数量的截断字符串和第二数量的集成字符串，分别等于第一数量的像素和第二数量的像素 像素数，集成的字符串被截断。

公开(公告)号：EP1496475A1

公开(公告)日：2005-01-12

申请号：EP03015270.6

申请日：2003-07-07

Applicant: STMicroelectronics S.r.l. ,  STMicroelectronics Limited

Inventor： Barone, Massimiliano ,  Pau, Danilo Pietro ,  Gardella, Pierluigi ,  Goda, Simon James ,  Hill, Stephen Adrian ,  Sweet, Gary James ,  Robart, Mathieu

IPC: G06T15/00 ,  G06T15/40

CPC classification number: G06T15/005 ,  G06T15/40

Abstract: A geometric processing stage (111b) for a pipelined engine for processing video signals and generating processed video signal in space coordinates (S) adapted for display on a screen. The geometric processing stage (111b) includes:

a model view module (201) for generating projection coordinates of primitives of the video signals in a view space, said primitives including visible and non-visible primitives,
a back face culling module (309) arranged downstream of the model view module (201) for at least partially eliminating the non visible primitives,
a projection transform module (204) for transforming the coordinates of the video signals from view space coordinates into normalized projection coordinates (P), and
a perspective divide module (208) for transforming the coordinates of the video signals from normalized projection (P) coordinates into screen space coordinates (S).

The back face culling module (309) is arranged downstream the projection transform module (204) and operates on normalized projection (P) coordinates of said primitives. The perspective divide module (208) is arranged downstream the back face culling module (309) for transforming the coordinates of the video signals from normalized projection (P) coordinates into screen space coordinates (S). A circuit (10) in the back face culling module can be shared with a standard three dimension back face culling operation when necessary.
A preferred application is in graphic engines using standard graphics language like OpenGL and NokiaGL.

Abstract translation: 用于在适用于在屏幕上显示空间坐标（S）的视频信号并产生已处理的视频信号的流水线处理引擎的几何处理级（111B）。 几何处理级（111B），包括：用于在视觉空间生成的原始视频信号的投影坐标的模型视图模块（201），所述原语包括可见和不可见图元，设置在背面剔除模块（309） 用于从视觉空间变换所述视频信号的坐标模型视图模块（201）用于至少部分地消除所述非可见原始，投影变换模块（204）的下游坐标转换成归一化的投影坐标（P），和一个透视分割 模块（208），用于从归一化的投影（P）变换所述视频信号的坐标坐标转换成屏幕空间坐标（S）。 的背面剔除模块（309）的下游布置在投影变换模块（204）和操作上归一化的投影（P）。所述原始的坐标。 在透视分割模块（208）被布置在下游的背面剔除模块（309），用于从归一化的投影（P）变换所述视频信号的坐标坐标转换成屏幕空间坐标（S）。 所述背面剔除模块中的电路（10）可以与标准三维背面共享剔除操作时是必要的。 一个优选的应用是在使用如OpenGL和NokiaGL标准图形语言的图形引擎。