| 摘要 |
<p>A method for enhancing detail information in rasterized, continuous tone images comprises a function that enlarges the contrast of a pixel in a neighbourhood of pixels when in that neighbourhood one of the pixels has a value that is close to a white colour. This is determined by selecting the whitest pixel in the neighbourhood. The function shows a gradual transition between the situations in which the whitest pixel is close to the white colour and in which the whitest pixel is far from the white colour. The method results in a better rendering of fine print when the image is sent to a printing system that reproduces the image on receiving material. For small characters the legibility is improved by application of this method.</p> |
