Apparatus and method for enhancing readability of a character

A method for enhancing readability of a character in a mobile terminal including a display unit, the method comprising the steps of:

• dividing a character image into a background and a character;
• determining R, G, and B values for each of the background and the character;
• calculating a readability value using the R, G, and B values of the background and the R, G, and B values of the character;
• determining if the calculated readability value is greater than or equal to a threshold value;
• determining whether the display unit includes a first display having light emitting diodes or the display unit includes a second display having a backlight;
• selecting the R, G, and B values of the background and the R, G, and B values of the character as a background color and a character color, respectively, based on determining that the display unit includes the first display when the readability value is greater than or equal to the threshold value;
• reducing lightness of the backlight, increasing the R, G, and B values of the character while maintaining a ratio of the R, G, and B values for the character, and selecting the R, G, and B values of the background and the increased R, G, and B values of the character as a background color and a character color, respectively, based on determining that the display unit includes the second display when the readability value is greater than or equal to the threshold value;
• and
• displaying, on the display unit, the character image configured with the background color and the character color.

A non-transitory computer-readable recording medium storing a program causing a processor to execute a method for enhancing readability of a character in a mobile terminal including a display unit, comprising:

• dividing a character image into a background and a character;
• determining R, G, and B values for each of the background and the character;
• calculating a readability value using the R, G, and B values of the background and the R, G, and B values of the character;
• determining if the calculated readability value is greater than or equal to a threshold value;
• determining whether the display unit includes a first display having light emitting diodes or the display unit includes a second display having a backlight;
• selecting the R, G, and B values of the background and the R, G, and B values of the character as a background color and a character color, respectively, based on determining that the display unit includes the first display when the readability value is greater than or equal to the threshold value;
• reducing lightness of the backlight, increasing the R, G, and B values of the character while maintaining a ratio of the R, G, and B values for the character, and selecting the R, G, and B values of the background and the increased R, G, and B values of the character as a background color and a character color, respectively, based on determining that the display unit includes the second display when the readability value is greater than or equal to the threshold value;
• and
• displaying, on the display unit, the character image configured with the background color, the character color.

A method for displaying text on a display unit of a mobile terminal, comprising:

• dividing a text image into a background and a character;
• calculating a readability value of the text image based on power consumption due to displaying the text image on the display unit and at least one of visibility and fatigue;
• determining if the calculated readability value is greater than or equal to a threshold value;
• determining whether the display unit includes a first display having light emitting diodes or the display unit includes a second display having a backlight;
• selecting R, G, and B values of the background and R, G, and B values of the character as a background color and a character color, respectively, based on determining that the display unit includes the first display when the readability value is greater than or equal to the threshold value;
• reducing lightness of the backlight, increasing the R, G, and B values of the character while maintaining a ratio of the R, G, and B values for the character, and selecting the R, G, and B values of the background and the increased R, G, and B values of the character as a background color and a character color, respectively, based on determining that the display unit includes the second display when the readability value is greater than or equal to the threshold value;
• and
• if the calculated readability value is not greater than or equal to the threshold value, performing one or more color-changing iterations, where each of the one or more color-changing iterations comprises:
• changing at least one of a Red (R), Green (G), or Blue (B) value of the character, and/or a R, G, or B value of the background;
• calculating a readability value of the color-changed text image;
• determining if the calculated readability value of the color-changed text image is greater than or equal to the threshold value;
• and
• if the calculated readability value of the color-changed text image is not greater than or equal to the threshold value, performing another iteration.