Patent ID: 8463067
Filing Date: 2013-06-11
Classification: H04N

Abstract:
1. An apparatus for improving visibility of an image, the apparatus comprising: a processor couple to a memory; an image input module receiving an image; an illuminance sensing module sensing external illuminance; a visibility compensating module compensating the input image by mapping the input image from a first color gamut to a second color gamut according to the sensed external illuminance, the second gamut being a color gamut in a high illuminance environment in which the external illuminance is greater than the luminance of a display device; and an image output module outputting the compensated image, wherein the visibility compensating module comprises: a first color space converting module converting image data of the input image into coordinates in a color space for a color gamut mapping in consideration of characteristics of a screen of the image output module under a darkroom environment; a color gamut mapping module mapping the converted image data from the first color gamut to the second color gamut; and a second color space converting module converting the color-gamut-mapped image data into an image to be displayed to a user according to the sensed external illuminance, wherein the color gamut mapping module increases a lightness and a chroma of the image data in the first color gamut, and wherein the color gamut mapping module corrects hue data of the image data in the first color gamut.