Merge 611c728360 into 7f287b705e

fix(image): correct HLG inverse-OETF clamp in hlg_to_linear
Signed-off-by: bigcat88 <bigcat88@icloud.com>
2026-07-12 09:27:15 +08:00 · 2026-07-04 22:30:16 -05:00 · 2026-07-04 10:39:29 +03:00
1 changed files with 3 additions and 2 deletions
--- a/comfy_extras/nodes_images.py
+++ b/comfy_extras/nodes_images.py
@ -891,10 +891,11 @@ def hlg_to_linear(t: torch.Tensor) -> torch.Tensor:
        return torch.cat([hlg_to_linear(rgb), alpha], dim=-1)

    # Piecewise: sqrt branch below 0.5, log branch above.
-    # Clamp inside the log branch so negative / out-of-range values don't blow up;
+    # Clamp the log branch at the 0.5 branch point (not above it) so the
+    # unselected lane stays finite in exp() without altering selected values;
    # values above 1.0 are allowed and extrapolate naturally.
    low = (t ** 2) / 3.0
-    high = (torch.exp((t.clamp(min=_HLG_C) - _HLG_C) / _HLG_A) + _HLG_B) / 12.0
+    high = (torch.exp((t.clamp(min=0.5) - _HLG_C) / _HLG_A) + _HLG_B) / 12.0
    return torch.where(t <= 0.5, low, high)
Author	SHA1	Message	Date
Alexander Piskun	c45da6e693	Merge `611c728360` into `7f287b705e`	2026-07-04 22:30:16 -05:00
bigcat88	611c728360	fix(image): correct HLG inverse-OETF clamp in hlg_to_linear Signed-off-by: bigcat88 <bigcat88@icloud.com>	2026-07-04 10:39:29 +03:00