Methods and systems for improving display resolution in images using sub-pixel sampling and visual error filtering

A method for displaying a higher-resolution image at a lower-resolution with reduced visible errors, said method comprising the acts of:

• converting a higher-resolution RGB image to a higher-resolution opponent color domain (OCD) image;
• splitting said higher-resolution OCD image into separate initial luminance and initial chrominance channels;
• converting said initial luminance channel into a RGB luminance image;
• performing sub-pixel sampling on said RGB luminance image;
• converting said sub-pixel sampled (SPS) RGB luminance image into a SPS OCD luminance image;
• splitting said SPS-OCD luminance image into separate SPS luminance and SPS chrominance channels;
• high-pass filtering said SPS chrominance channels;
• low-pass filtering said initial chrominance channels of said higher-resolution OCD image;
• 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 OCD lower-resolution image;
• and
• converting said error-reduced OCD lower-resolution image to an error-reduced lower-resolution RGB image.

A method for converting a higher-resolution image to a lower-resolution image with reduced visible errors, said method comprising steps for:

• 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.

A system for converting a higher-resolution image to a lower-resolution image with reduced visible errors, said system comprising:

• a first splitter for splitting a higher-resolution opponent color domain (OCD) image into separate initial luminance and initial chrominance channels;
• a sub-pixel sampler for performing sub-pixel sampling on said initial luminance channel thereby creating an additive color domain (ACD) luminance image;
• a converter for converting said ACD luminance image into an OCD luminance image;
• a second splitter for splitting said OCD luminance image into separate sub-pixel sampled (SPS) luminance and SPS chrominance channels;
• a high-pass filter for high-pass filtering said SPS chrominance channels;
• a low-pass filter for low-pass filtering said initial chrominance channels;
• a sub-sampler for sub-sampling said filtered initial chrominance channels;
• a first combiner for combining said sub-sampled, low-pass filtered chrominance channels with said high-pass filtered SPS chrominance channels;
• and
• a second combiner for combining said combined chrominance channels with said SPS luminance channel to form an error-reduced lower-resolution image.

A computer readable medium comprising instructions for converting a higher-resolution image to a lower-resolution image with reduced errors, said instructions 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.

A computer data signal embodied in an electronic transmission, said signal having the function of converting a higher-resolution image to a lower-resolution image with reduced visible errors, said signal comprising instructions for:

• 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.