Methods and apparatus for detecting and reducing color errors in images

A computer readable medium, comprising:

• computer executable instructions for performing a pixel processing operation, the pixel processing operation including the steps of:
• obtaining a first pixel sub-component luminous intensity value of a pixel;
• determining if a the first pixel sub-component luminous intensity value of the pixel falls within a range of acceptable pixel sub-component luminous. intensity values;
• and
• if it is determined that the first pixel sub-component luminous intensity value does not fall within said range of acceptable pixel sub-component luminous intensity values, performing the steps of:
• adjusting the first pixel sub-component luminous intensity value by changing the intensity thereof;
• and
• displaying an image on the display device using the first pixel sub-component luminous intensity value after the step of adjusting so as to reduce a color artifact that would otherwise be experienced.

A display system, comprising:

• a display device including a plurality of pixels, each pixel including a plurality of pixel sub-components;
• means for generating pixel sub-component luminous intensity values from filtered displaced image samples, each pixel sub-component luminous intensity value corresponding to a different portion of an image;
• means for comparing each pixel sub-component luminous intensity value to a range of acceptable pixel sub-component luminous intensity values;
• and
• means for adjusting a pixel sub-component luminous intensity value by changing the intensity thereof if it is determined by the means for comparing to be outside the range of acceptable pixel sub-component luminous intensity values to which the pixel sub-component luminous intensity value is compared.

A method of processing pixels representing an image being displayed using a foreground and a background color, the method comprising the steps of:

• receiving current pixel red, green, and blue luminous intensity values corresponding to a pixel being processed;
• determining if the current pixel red luminous intensity value is within a range of acceptable red luminous intensity values;
• and
• if it is determined that the current pixel red luminous intensity value is outside the range of acceptable red luminous intensity values, performing the steps of:
• adjusting the current pixel red luminous intensity value to a value within the range of acceptable red luminous intensity values by adjusting the intensity thereof;
• and
• displaying an image on a display device using the adjusted current pixel red luminous intensity value so as to reduce a color artifact that would otherwise be experienced.

A computer readable medium, comprising:

• computer executable instructions for performing a pixel processing operation, the pixel processing operation including the steps of:
• receiving current pixel red, green, and blue luminous intensity values corresponding to a pixel being processed;
• determining if the current pixel red luminous intensity value is within a range of acceptable red luminous intensity values;
• if it is determined that the current pixel red luminous intensity value is outside the range of acceptable red luminous intensity values, performing the steps of:
• adjusting the current pixel red luminous intensity value to a value within the range of acceptable red luminous intensity values by adjusting the intensity thereof;
• and
• displaying an image on a display device using the adjusted current pixel red luminous intensity value so as to reduce a color artifact that would otherwise be experienced.

A method of processing red, green and blue pixel sub-component luminous intensity values, comprising the steps of:

• receiving current pixel red and green luminous intensity values corresponding to a pixel being processed;
• determining if the magnitude of the difference between the red and green pixel sub-component luminous intensity values exceeds a red filter threshold value;
• and
• if the magnitude of the difference between the red and green pixel sub-component luminous intensity values exceeds the red filter threshold value, performing the steps of:
• modifying the intensity of at least one of the red and green pixel sub-component luminous intensity values to decrease the magnitude of the difference therebetween;
• and
• displaying an image on a display device using said at least one of the red and green luminous intensity values after the step of modifying the intensity so as to reduce a color artifact that would otherwise be experienced.

A method of processing red, green and blue pixel sub-component luminous intensity values, comprising the steps of:

• receiving current pixel red and green luminous intensity values corresponding to a pixel being processed;
• determining if a red difference value resulting from subtracting the green pixel sub-component luminous intensity values from the red pixel sub-component luminous intensity value exceeds a red filter threshold value;
• and
• if said red difference value exceeds the red filter threshold value,
• modifying the intensity of at least one of the red and green pixel sub-component luminous intensity values to decrease the magnitude of the difference therebetween;
• and
• displaying an image on the display device using said at least one of the red and green luminous intensity values after the step of modifying the intensity so as to reduce a color artifact that would otherwise be experienced.