Patent ID: 6873373
Filing Date: 2005-03-29
Classification: H04N

Abstract:
1. An image emphasizing apparatus for emphasizing an outline of an image expressed by an input video signal by adding an outline compensation signal to the input video signal so as to sharpen the image expressed by the input video signal, comprising: an outline component extraction section for extracting from the input video signal an outline component which is a signal component corresponding to the outline of the image; a threshold value calculation section for calculating a first threshold value, which is used for suppressing excessive emphasis of the outline, and a second threshold value, which is used for emphasizing an outline of a fine detailed image included in the image, the second threshold value being greater than the first threshold value; and an outline correction section for generating an outline emphasizing signal from the outline component based on the first and second threshold values, and adding the outline emphasizing signal or a gain adjusted outline emphasizing signal, as the outline compensation signal, to the input video signal, thereby generating an output video signal which expresses an image obtained by sharpening the image, wherein the outline correction section includes: