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.

Notes:

• The LDR examples below were converted from sRGB to linear light and then multiplied by 100 nits before encoding as HDR.
• These images are already outdated - we've added dual plane support to the encoder. Roughly 1/3-1/2 of blocks now use dual planes.

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• 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: