From 7dd1ac57178055aa8407777d4fb03787e21e6f66 Mon Sep 17 00:00:00 2001 From: skal Date: Wed, 11 Feb 2026 10:10:11 +0100 Subject: fix: Move sigmoid activation to call site in CNN layer shader Conv functions now return raw sum, sigmoid applied at call site. Matches tanh pattern used for inner layers. Co-Authored-By: Claude Sonnet 4.5 --- workspaces/main/shaders/cnn/cnn_conv3x3.wgsl | 2 +- workspaces/main/shaders/cnn/cnn_conv5x5.wgsl | 2 +- workspaces/main/shaders/cnn/cnn_layer.wgsl | 4 ++-- 3 files changed, 4 insertions(+), 4 deletions(-) (limited to 'workspaces/main/shaders/cnn') diff --git a/workspaces/main/shaders/cnn/cnn_conv3x3.wgsl b/workspaces/main/shaders/cnn/cnn_conv3x3.wgsl index d680840..48bb392 100644 --- a/workspaces/main/shaders/cnn/cnn_conv3x3.wgsl +++ b/workspaces/main/shaders/cnn/cnn_conv3x3.wgsl @@ -108,5 +108,5 @@ fn cnn_conv3x3_7to1( } } - return 1.0 / (1.0 + exp(-sum)); + return sum; } diff --git a/workspaces/main/shaders/cnn/cnn_conv5x5.wgsl b/workspaces/main/shaders/cnn/cnn_conv5x5.wgsl index e39f6ef..9328d75 100644 --- a/workspaces/main/shaders/cnn/cnn_conv5x5.wgsl +++ b/workspaces/main/shaders/cnn/cnn_conv5x5.wgsl @@ -62,7 +62,7 @@ fn cnn_conv5x5_7to1( } } - return 1.0 / (1.0 + exp(-sum)); + return sum; } // Source layer: 7→4 channels (vec4-optimized) diff --git a/workspaces/main/shaders/cnn/cnn_layer.wgsl b/workspaces/main/shaders/cnn/cnn_layer.wgsl index c5f45ec..73816c6 100644 --- a/workspaces/main/shaders/cnn/cnn_layer.wgsl +++ b/workspaces/main/shaders/cnn/cnn_layer.wgsl @@ -45,8 +45,8 @@ struct CNNLayerParams { result = cnn_tanh(result); // Keep in [-1,1] } else if (params.layer_index == 2) { - let gray_out = cnn_conv3x3_7to1(txt, smplr, uv, uniforms.resolution, gray, weights_layer2); - // gray_out in [0,1] (sigmoid activation) + let sum = cnn_conv3x3_7to1(txt, smplr, uv, uniforms.resolution, gray, weights_layer2); + let gray_out = 1.0 / (1.0 + exp(-sum)); // Sigmoid activation result = vec4(gray_out, gray_out, gray_out, 1.0); return mix(original_raw, result, params.blend_amount); // [0,1] } -- cgit v1.2.3