Patent ID: 6608632
Filing Date: 2003-08-19
Classification: G09G

Abstract:
A method for converting a higher-resolution image to a lower-resolution image with reduced visible errors, said method comprising the acts of:splitting a higher-resolution opponent color domain (OCD) image into separate initial luminance and initial chrominance channels; performing sub-pixel sampling on said initial luminance channel thereby creating an additive color domain (ACD) luminance image; converting said ACD luminance image into an OCD luminance image; splitting said OCD luminance image into separate sub-pixel sampled (SPS) luminance and SPS chrominance channels; high-pass filtering said SPS chrominance channels; low-pass filtering said initial chrominance channels; sub-sampling said filtered initial chrominance channels; combining said sub-sampled, low-pass filtered chrominance channels with said high-pass filtered SPS chrominance channels; and combining said combined chrominance channels with said SPS luminance channel to form an error-reduced lower-resolution image.