Patent Document ID: 20100166301
Application ID: 12647501
Patent Status: 0

Claim One:
1. An apparatus comprising: a first block extracting only a luminance component having a saturation, hue, and value domain from red, green and blue values of an image; a second block outputting a log summation value and pixel count value with respect to a luminance component of an overall image by using the extracted luminance component and a natural log value; and a third block calculating a luminance average value of the image by using the natural log summation value and the pixel count value outputted in the second block, the third block generating a tone mapping look up table including a tone mapping operator (L d ) for each luminance range to obtain a final output image using the calculated luminance average value, wherein the third block outputs a tone mapped red, green and blue value by multiplying a corresponding tone mapping operator (L d ) of the tone mapping look up table by a red, green and blue value of the input image.