Transformer Step 1
Portrait matting — ONNX + WASM
Model A
Compare side-by-side
Model B
Random Video
Webcam
Start Inference
Show composite (green screen)
Soft alpha (raw mask)
Track crop (ROI follow)
Detailed metrics
No prior (black mask)
Joint bilateral upsample
JBU edge sensitivity:
0.12
JBU spatial σ:
2.0
JBU kernel stride:
2.0
Snapshot
Idle.
Source
Mask Canvas
Composite
Mask B
Composite B