update cnn code

1 files changed, 1 insertions, 1 deletions

diff --git a/workspaces/main/shaders/cnn/cnn_layer.wgsl b/workspaces/main/shaders/cnn/cnn_layer.wgsl
index 73816c6..e629cb2 100644
--- a/workspaces/main/shaders/cnn/cnn_layer.wgsl
+++ b/workspaces/main/shaders/cnn/cnn_layer.wgsl
@@ -32,7 +32,7 @@ struct CNNLayerParams {
     let uv = (p.xy - 0.5) / (uniforms.resolution - 1.0);
     let original_raw = textureSample(original_input, smplr, uv);
     let original = (original_raw - 0.5) * 2.0;  // Normalize to [-1,1]
-    let gray = dot(original.rgb, vec3<f32>(0.2126, 0.7152, 0.0722));
+    let gray = (dot(original_raw.rgb, vec3<f32>(0.2126, 0.7152, 0.0722)) - 0.5) * 2.0;
     var result = vec4<f32>(0.0);
 
     // Layer 0: 7→4 (RGBD output, normalizes [0,1] input)