| 摘要 |
<p>A method and apparatus enhance a color or grayscale raster image in a printer (10) by identifying a working pixel (48,108) in the raster image for anti-aliasing, and then modifying luminance data (52,112) of the working pixel in a luminance chrominance color space such that an anti-aliasing effect is achieved relative to the raster image. The luminance component of the raster image data is converted to a binary format (106) to identify the working pixel using RET template matching (108). The luminance data of the working pixel is modified by utilizing luminance data of adjacent pixels (52,112) to produce a new luminance value which is then assigned to the working pixel. One of the adjacent pixels defines an edge of the object being anti-aliased in the raster image, and the other of the adjacent pixels defines an edge of a region in the raster image that is adjacent the object. In the event chroma data is associated with the object, the chroma data is combined with the modified luminance data (118) and also assigned to the working pixel for accurate imaging thereof. <IMAGE></p> |
