Patent ID: 6160921
Filing Date: 2000-12-12
Classification: H04N

Abstract:
A method for quantizing image data, comprising the steps of:retrieving image data for a selected pixel of an image;determining whether the selected pixel lies within a highlight or shadow region of the image;detecting whether another pixel within a predetermined distance of the selected pixel has a quantized value representative of a dot that is complementary to the determined region of the image, when the selected pixel is determined to be in a highlight or shadow region of the image;quantizing the image data for the selected pixel to a value representative of a dot that is complementary to the determined region of the image if no other pixel within said predetermined distance has a quantized value representative of a dot that is complementary to the determined region of the image; andotherwise quantizing the image data for the selected pixel to a value associated with the determined region of the image.