Method and apparatus for detecting and reducing color artifacts in images

A computer readable medium, comprising:

• computer executable instructions for performing, in a computer system associated with a display device having a plurality of pixels, each including a plurality of pixel sub-component each of a different color, a method of reducing color artifacts that can be present as a result of treating the pixel sub-components as independent luminous intensity sources, the method including the steps for:
• obtaining image data that includes luminous intensity values associated with individual pixel sub-components of a pixel, the luminous intensity values representing different portions of the image that have been mapped to the individual pixel sub-components, the luminous intensity values including a red luminous intensity value associated with a red pixel sub-component of the pixel and a green luminous intensity value associated with a green pixel sub-component of the pixel;
• and
• adjusting the image data so that a difference between the red luminous intensity value and the green luminous intensity value is reduced based on a determination that color artifacts would otherwise be present in a displayed image rendered using the image data.

A computer system comprising:

• a display device including a plurality of pixels, each including red, green and blue pixel sub-components;
• means for obtaining image data that includes a red luminous intensity value associated with the red pixel sub-component, a green luminous intensity value associated with the green pixel sub-component, and a blue luminous intensity value associated with the blue pixel sub-component of a particular pixel, the luminous intensity values representing different portions of the image that have been mapped to the individual pixel sub-components of the particular pixel;
• and
• adjusting the image data so that a difference between the red luminous intensity value and the green luminous intensity value is reduced based on a determination that color artifacts would otherwise be present in a displayed image rendered using the image data.

In a computer system associated with a display device for displaying an image having a foreground and background color, the display device having a plurality of pixels, each including a plurality of pixel sub-components each of a different color, a method of reducing artifacts in a displayed image that can be present as a result of treating the pixel sub-components as independent luminous intensity sources, the method comprising the acts of:

• i) obtaining image data that includes red, green and blue luminous intensity values associated with the red, green, and blue pixel sub-components, respectively, of a particular pixel, the red, green, and blue luminous intensity values representing different portions of the image that have been mapped to the individual pixel sub-components of the particular pixel;
• ii) determining an overall luminance of the particular pixel from the red, green, and blue luminous intensity values;
• iii) determining that the overall luminance is less than the overall luminance that would result if the particular pixel were to be given the foreground color and is also less than the overall luminance that would result if the particular pixel were to be given the background color pixel;
• and
• iv) based on the result of the act of determining, performing the acts of:
• performing an image processing operation to generate a new set of red, green and blue luminous intensity values for the red, green and blue pixel sub-components;
• and
• substituting the new set of red, green and blue luminous intensity values for the red, green and blue luminous intensity values included in the image data.

A computer readable medium, comprising:

• computer executable instructions for performing, in a computer system associated with a display device for displaying an image having a foreground and background color, the display device having a plurality of pixels, each including a plurality of pixel sub-components each of a different color, a method of reducing artifacts in a displayed image that can be present as a result of treating the pixel sub-components as independent luminous intensity sources, the method including the acts of:
• i) obtaining image data that includes red, green and blue luminous intensity values associated with the red, green, and blue pixel sub-components, respectively, of a particular pixel, the red, green, and blue luminous intensity values representing different portions of the image that have been mapped to the individual pixel sub-components of the particular pixel;
• ii) determining an overall luminance of the particular pixel from the red, green, and blue luminous intensity values;
• iii) determining that the overall luminance is less than the overall luminance that would result if the particular pixel were to be given the foreground color and is also less than the overall luminance that would result if the particular pixel were to be given the background color pixel;
• and
• iv) based on the result of the act of determining, performing the acts of:
• performing an image processing operation to generate a new set of red, green and blue luminous intensity values for the red, green and blue pixel sub-components;
• and
• substituting the new set of red, green and blue luminous intensity values for the red, green and blue luminous intensity values included in the image data.

In a computer system associated with a display device for displaying an image having a foreground and background color, the display device having a plurality of pixels, each including a plurality of pixel sub-components each of a different color, a method of reducing artifacts in a displayed image that can be present as a result of treating the pixel sub-components as independent luminous intensity sources, the method comprising the steps for:

• obtaining image data that includes luminous intensity values associated with individual pixel sub-components of a particular pixel, the luminous intensity values representing different portions of the image that have been mapped to the individual pixel sub-components of the particular pixel, said different portions of the image including a first region associated with the foreground color and a second region associated with the background color;
• comparing the overall color of the particular pixel to a selected range of colors representing acceptable mixes of the foreground color and the background color;
• and
• when it is determined that the overall color of the particular pixel is outside said selected range of colors, performing a color correction operation on the image data to adjust the overall color.

A computer readable medium, comprising:

• computer executable instructions for performing, in a computer system associated with a display device for displaying an image having a foreground and background color, the display device having a plurality of pixels, each including a plurality of pixel sub-components each of a different color, a method of reducing artifacts in a displayed image that can be present as a result of treating the pixel sub-components as independent luminous intensity sources, the method including the steps for:
• obtaining image data that includes luminous intensity values associated with individual pixel sub-components of a particular pixel, the luminous intensity values representing different portions of the image that have been mapped to the individual pixel sub-components of the particular pixel, said different portions of the image including a first region associated with the foreground color and a second region associated with the background color;
• comparing the overall color of the particular pixel to a selected range of colors representing acceptable mixes of the foreground color and the background color;
• and
• when it is determined that the overall color of the particular pixel is outside said selected range of colors, performing a color correction operation on the image data to adjust the overall color.

In a computer system associated with a display device for displaying an image having a foreground and background color, the display device having a plurality of pixels, each including a plurality of pixel sub-components each of a different color, a method of reducing artifacts in a displayed image that can be present as a result of treating the pixel sub-components as independent luminous intensity sources, the method comprising the acts of:

• obtaining image data that includes luminous intensity values associated with individual pixel sub-components of a particular pixel, the luminous intensity values representing different portions of the image that have been mapped to the individual pixel sub-components of the particular pixel, said different portions of the image including a first region associated with the foreground color and a second region associated with the background color;
• determining that a red luminous intensity value associated with a red pixel sub-component of the particular pixel falls outside a range of red luminous intensity values that extends from a red luminous intensity value associated with the foreground color to a red luminous intensity value associated with the background color;
• and
• based on the determination that the red luminous intensity value associated with the red pixel sub-component of the particular pixel falls outside said range of red luminous intensity values, adjusting the red luminous intensity value associated with the red pixel sub-component so that it is closer to or falls within said range of red luminous intensity values.

In a computer system associated with a display device for displaying an image having a foreground and background color, the display device having a plurality of pixels, each including a plurality of pixel sub-components each of a different color, a method of reducing artifacts in a displayed image that can be present as a result of treating the pixel sub-components as independent luminous intensity sources, the method comprising the acts of:

• obtaining image data that includes luminous intensity values associated with individual pixel sub-components of at least N pixels of the display device, where N is an integer, the luminous intensity values representing different portions of the image that have been mapped to the individual pixel sub-components;
• comparing the color of each of the N pixels to a selected range of colors corresponding to acceptable mixes of the foreground color and the background color;
• and
• adjusting the color of at least some of the N pixels, said at least some of the N pixels being the pixels having a color that falls outside said range of colors.