todo

Reinhard tonemapped, Core i7 (Raptor Lake). Features: 48 ASTC HDR 6x6 modes, 1 or 2 subsets, weight grid upsampling, CEM 7/11, ICtCp colorspace error metrics, Lagrangian Rate-Distortion Optimization with perceptual weighting, endpoint DPCM, ASTC configuration reuse.

Note the LDR examples below were converted from sRGB to linear light and then multiplied by 100 nits before encoding as HDR.

• candleglass.exr, 1000x810, 1.36 bits/pixel, 4.4ms decode to ASTC, 27.7ms transcode to BC6H

ASTC HDR 6x6

BC6H

ASTC HDR 6x6

BC6H

• office.hdr, 2000x1312, 2.39 bits/pixel, 39ms decode to ASTC, 12.5ms transcode to BC6H

ASTC HDR 6x6:

BC6H:

ASTC HDR 6x6:

BC6H:

• aft_lounge_4k.exr, 4096x2048, 2.28 bits/pixel, 55ms decode to ASTC, 370ms transcode to BC6H

ASTC HDR 6x6:

BC6H:

ASTC HDR 6x6:

BC6H:

• xmen.png (LDR, no tonemapping), 1000x1482, 2.99 bits/pixel, 11ms decode to ASTC, 51.5ms transcode to BC6H

ASTC HDR 6x6

BC6H

• batman_cover.png (LDR, no tonemapping), 3.1 bits/pixel, 1.5ms decode to ASTC, 12.3ms transcode to BC6H

ASTC HDR 6x6

BC6H

• sciwallpaper.png (LDR, no tonemapping), 2880x1800, 2.59 bits/pixel, 35.5ms decode to ASTC, 202ms transcode to BC6H

ASTC HDR 6x6

BC6H

• desk.exr, 644x874, 3.1 bits/pixel, 7.6ms decode to ASTC, 26.5ms transcode to BC6H

ASTC HDR 6x6

BC6H

LDR delta visualization (tonemapped ASTC HDR 6x6 - tonemapped BC6H, biased by 128):

• Custom Processing/visualization tool screenshot: