利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

2 条记录 (耗时 0.007 秒)

    INTERPOLATION OF PIXEL VALUES AND ALPHA VALUES IN A COMPUTER GRAPHICS DISPLAY DEVICE
    1.
    发明公开
    INTERPOLATION OF PIXEL VALUES AND ALPHA VALUES IN A COMPUTER GRAPHICS DISPLAY DEVICE 失效
    INTERBOLIEREN VON PIXELWERTEN UND ALPHAWERTEN IN EINER ANZEIGEVORRICHTUNGFÜRCOMPUTERGRAFIKEN

    公开(公告)号：EP1012789A4

    公开(公告)日：2000-06-28

    申请号：EP97914928

    申请日：1997-03-05

    申请人： POWERTV INC

    发明人： CHEN JIANN-TSUEN ,  MACINNIS ALEXANDER G

    IPC分类号： G06T3/40

    CPC分类号： G06T3/4007

    摘要： An apparatus is provided for interpolating a low or medium resolution image (413) to a higher resolution image (414) using a pixel replication (404) and averaging (412) technique. An overlay image having pixels of first display resolution and a plurality of alpha blending values (413) each indicating the degree of blending with a background image is interpolated to the resolution of the background image (414). In addition to interpolating pixel values, alpha blending values are themselves interpolated and multiplied by corresponding overlay pixel values prior to being blended wit the background image.

    摘要翻译： 提供了一种使用像素复制（404）和平均（412）技术将低分辨率图像或中分辨率图像（413）内插到较高分辨率图像（414）的装置。 具有第一显示分辨率的像素和多个表示与背景图像混合的程度的α混合值（413）的覆盖图像被内插到背景图像的分辨率（414​​）。 除了内插像素值之外，在与背景图像混合之前，阿尔法混合值本身被内插并乘以相应的重叠像素值。

    BLENDING OF VIDEO IMAGES IN A HOME COMMUNICATIONS TERMINAL
    2.
    发明公开
    BLENDING OF VIDEO IMAGES IN A HOME COMMUNICATIONS TERMINAL 失效
    视频图像混合在一个家庭通信终端

    公开(公告)号：EP0885528A4

    公开(公告)日：1999-03-31

    申请号：EP97908737

    申请日：1997-03-06

    申请人： POWERTV INC

    发明人： CHEN JIANN-TSUEN ,  MACINNIS ALEXANDER G

    IPC分类号： H04N9/75 ,  H04N9/74

    CPC分类号： H04N9/75 ,  G09G5/026 ,  G09G5/377 ,  G09G5/397 ,  G09G2340/10

    摘要： A graphics blending feature for a terminal (200) such as a home communication terminal (HCT) allows an overlay image (301) to be selectively blended with a background image (302) through the use of a chroma key function and one or more alpha control bits (206-208). The chroma key function is used to determine whether the overlay will be completely transparent or not, and the one or more alpha control bits are used to look up a larger alpha value used to blend the overlay and background images. By using small number of alpha control bits to retrieve a larger value for blending, memory requirements per pixel are reduced. The chroma key function may be implemented by comparing each overlay pixel value to a chroma value and, responsive to a match, making the overlay pixel transparent (i.e., no blending occurs). A dithering function is included in various embodiments to smooth out the resulting image.