demo.git/tools/cnn_v2_test/index.html, branch main

refactor(cnn): isolate CNN v2 to cnn_v2/ subdirectory

2026-02-15T17:44:17Z

Move all CNN v2 files to dedicated cnn_v2/ directory to prepare for CNN v3 development. Zero functional changes. Structure: - cnn_v2/src/ - C++ effect implementation - cnn_v2/shaders/ - WGSL shaders (6 files) - cnn_v2/weights/ - Binary weights (3 files) - cnn_v2/training/ - Python training scripts (4 files) - cnn_v2/scripts/ - Shell scripts (train_cnn_v2_full.sh) - cnn_v2/tools/ - Validation tools (HTML) - cnn_v2/docs/ - Documentation (4 markdown files) Changes: - Update CMake source list to cnn_v2/src/cnn_v2_effect.cc - Update assets.txt with relative paths to cnn_v2/ - Update includes to ../../cnn_v2/src/cnn_v2_effect.h - Add PROJECT_ROOT resolution to Python/shell scripts - Update doc references in HOWTO.md, TODO.md - Add cnn_v2/README.md Verification: 34/34 tests passing, demo runs correctly. Co-Authored-By: Claude Sonnet 4.5

refactor(tools): consolidate common CSS for HTML tools

2026-02-15T16:09:57Z

Extract common styles from various tool HTML files (timeline, spectral, cnn_v2_test, etc.) into a shared stylesheet. This reduces code duplication and improves maintainability of the tool frontends. - Create a new 'tools/common/style.css' to house the shared rules. - Update all tool HTML files to link to the new stylesheet. - Remove redundant inline styles from individual HTML files.

CNN v2: bilinear mip-level sampling and UI improvements

2026-02-14T06:24:51Z

**CNN v2 Changes:** - Replace point sampling with bilinear interpolation for mip-level features - Add linear sampler (binding 6) to static features shader - Update CNNv2Effect, cnn_test, and HTML tool **HTML Tool UI:** - Move controls to floating bottom bar in central view - Consolidate video controls + Blend/Depth/Save PNG in single container - Increase left panel width: 300px → 315px (+5%) - Remove per-frame debug messages (visualization, rendering logs) **Technical:** - WGSL: textureSample() with linear_sampler vs textureLoad() - C++: Create WGPUSampler with Linear filtering - HTML: Change sampler from 'nearest' to 'linear' handoff(Claude): CNN v2 now uses bilinear mip-level sampling across all tools

Replace hard clamp with sigmoid activation in CNN v2

2026-02-14T01:12:12Z

Fixes training collapse where p1/p2 channels saturate due to gradient blocking at clamp boundaries. Sigmoid provides smooth [0,1] mapping with continuous gradients. Changes: - Layer 0: clamp(x, 0, 1) → sigmoid(x) - Final layer: clamp(x, 0, 1) → sigmoid(x) - Middle layers: ReLU unchanged (already stable) Updated files: - training/train_cnn_v2.py: PyTorch model activations - workspaces/main/shaders/cnn_v2/cnn_v2_compute.wgsl: WGSL shader - tools/cnn_v2_test/index.html: HTML validation tool - doc/CNN_V2.md: Documentation Validation: - Build clean (no shader errors) - 34/36 tests pass (2 unrelated script tests fail) - 10-epoch training: loss 0.153 → 0.088 (good convergence) - cnn_test processes images successfully Breaking change: Old checkpoints trained with clamp() incompatible. Retrain from scratch required. handoff(Claude): CNN v2 sigmoid activation implemented and validated.

CNN v2 web tool: Remove vizScale, always show raw layer values

2026-02-13T23:54:40Z

Always use vizScale=1.0 for all layers. Shader clips to [0,1] for display. Shows exact layer output values without artificial dimming. Co-Authored-By: Claude Sonnet 4.5

CNN v2 web tool: Fix vizScale for final layer preview

2026-02-13T23:53:43Z

Final layer output is clamped [0,1] and should use vizScale=1.0 like static features, not 0.5 like middle layers (unbounded ReLU). Before: All layers except static used 0.5 (too dark) After: Static + final layer use 1.0, middle layers use 0.5 Fixes brightness mismatch between big preview and thumbnails. Co-Authored-By: Claude Sonnet 4.5

CNN v2 tool: Fix off-by-one in composited layer filenames

2026-02-13T23:37:02Z

currentLayerIdx indexes layerOutputs array (0=Static Features, 1=Layer 0). Filename should use layer number, not array index. Co-Authored-By: Claude Sonnet 4.5

CNN v2: Remove vizScale, always clip to [0,1]

2026-02-13T22:42:53Z

All layers now use scale 1.0, shader clamps values >1. Co-Authored-By: Claude Sonnet 4.5

CNN v2: Fix Layer 0 visualization scale (was 0.5, now 1.0)

2026-02-13T22:40:30Z

Layer 0 output is clamped [0,1], does not need 0.5 dimming. Middle layers (ReLU) keep 0.5 scale for values >1. Co-Authored-By: Claude Sonnet 4.5

CNN v2: Add debugging tools for mismatch investigation

2026-02-13T22:32:32Z

Add identity weight generator and composited layer save for debugging HTML/C++ output differences. Co-Authored-By: Claude Sonnet 4.5