Patent ID: 7885469

Claim:
A computer-implemented method ( 400 ) comprising: representing HDR information from a high dynamic range (HDR) image ( 114 ) in a single color channel ( 122 ), the HDR image being in YCbCr color space that includes a Y channel representing luma component, a Cb channel and a Cr channel representing chroma components, the single color channel being the Y channel, the representing comprising: preserving the Y channel of the HDR image; and dividing the Cb channel and the Cr channel by the Y channel; quantizing ( 402 ) the single color channel different from other color channels to generate quantized information ( 122 ), the quantizing comprising dividing a single luminance range of the HDR image into a first luminance range and a second luminance range based on a criteria that minimizes total quantization error as a function of numbers of luminance pixels associated with the first luminance range and the second luminance range; and compressing ( 408 ) each block ( 122 ) of multiple blocks of the quantized information of the HDR image to create a first HDR texture and a second HDR texture ( 116 ), the compressing comprising: encoding pixels associated with the first luminance range into a particular color channel associated with the first HDR texture ( 116 ) via a first texture compression algorithm; and encoding pixels associated with the second luminance range into a particular color channel associated with the second HDR texture via a second texture compression algorithm different from the first texture compression algorithm.