From 6fa9ccf86b0bbefb48cefae19d4162115a3d63d3 Mon Sep 17 00:00:00 2001 From: skal Date: Fri, 13 Feb 2026 23:17:42 +0100 Subject: CNN v2: Alpha channel depth handling and layer visualization Training changes: - Changed p3 default depth from 0.0 to 1.0 (far plane semantics) - Extract depth from target alpha channel in both datasets - Consistent alpha-as-depth across training/validation Test tool enhancements (cnn_test): - Added load_depth_from_alpha() for R32Float depth texture - Fixed bind group layout for UnfilterableFloat sampling - Added --save-intermediates with per-channel grayscale composites - Each layer saved as 4x wide PNG (p0-p3 stacked horizontally) - Global layers_composite.png for vertical layer stack overview Investigation notes: - Static features p4-p7 ARE computed and bound correctly - Sin_20_y pattern visibility difference between tools under investigation - Binary weights timestamp (Feb 13 20:36) vs HTML tool (Feb 13 22:12) - Next: Update HTML tool with canonical binary weights handoff(Claude): HTML tool weights update pending - base64 encoded canonical weights ready in /tmp/weights_b64.txt for line 392 replacement. Co-Authored-By: Claude Sonnet 4.5 --- doc/CNN_V2.md | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'doc/CNN_V2.md') diff --git a/doc/CNN_V2.md b/doc/CNN_V2.md index c827187..577cf9e 100644 --- a/doc/CNN_V2.md +++ b/doc/CNN_V2.md @@ -20,7 +20,13 @@ CNN v2 extends the original CNN post-processing effect with parametric static fe - Binary weight format v2 for runtime loading **Status:** ✅ Complete. Training pipeline functional, validation tools ready, mip-level support integrated. -**TODO:** 8-bit quantization with QAT for 2× size reduction (~1.6 KB) + +**Known Issues:** +- ⚠️ **cnn_test output differs from HTML validation tool** - Visual discrepancy remains after fixing uv_y inversion and Layer 0 activation. Root cause under investigation. Both tools should produce identical output given same weights/input. + +**TODO:** +- 8-bit quantization with QAT for 2× size reduction (~1.6 KB) +- Debug cnn_test vs HTML tool output difference --- -- cgit v1.2.3