摘要 |
Methods and apparatus for rendering and/or displaying images such as text using sub-pixel accuracy are described. In various embodiments, character advance width (402) is determined using pixel precision while left side bearing (404) and/or black body (407) width is determined using sub-pixel precision (911). Such embodiments provide for characters with overall widths (910) corresponding to pixel widths but with the character black bodies (407) being positioned within the overall character space to a higher degree of position than when pixel precision is used. In other embodiments, sub-pixel precision (911) is used for determining a character's overall width (910) as well as left side bearing (404) and black body width (407) values. In such embodiments, black body (407) starting points and left side bearing (404) points are aligned with sub-pixel component boundaries. By treating R, G, B pixel element sub-components as independent luminous intensity sources and by using pixel sub-component accuracy for character width, spacing and positioning, overall image appearance is enhanced as compared to embodiments which use pixel precision for character width, spacing and positioning values.
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