# GPU lane: CUDA + bf16 across all three models. Full pipeline (BiRefNet seg +
# ViTMatte + HR-matting cross-check). Foreground estimation auto-uses the CuPy GPU
# backend when cupy is installed (see foreground.use_gpu, default on). despill is
# off (it false-positives on subjects sharing the background hue).
screen_color: null

model:
  model_name: hustvl/vitmatte-base-composition-1k
  device: cuda
  matting_method: vitmatte
  fallback_to_chroma_alpha: false
  precision: bf16
  attn_query_chunk: 2048

segmentation:
  enabled: true
  backend: birefnet
  model_name: ZhengPeng7/BiRefNet
  device: cuda
  input_size: 1024
  precision: bf16

trimap:
  sure_bg_threshold: 0.92
  sure_fg_threshold: 0.12
  unknown_radius_ratio: 0.012
  fg_safe_radius_ratio: 0.006
  seg_core_threshold: 0.60
  seg_loose_threshold: 0.08
  mode: directional
  seg_low: 0.15
  bg_hue_proj_min: 4.0
  seg_force_fg: 0.98

alpha_post:
  chroma_suppress: true
  chroma_suppress_bg_low: 0.35
  chroma_suppress_bg_high: 0.80
  chroma_suppress_strength: 1.0
  suppress_raw_lo: 0.85
  suppress_raw_hi: 0.98

cross_check:
  enabled: true
  model_name: ZhengPeng7/BiRefNet_HR-matting
  input_size: 2048
  reuse_as_seg: false
  precision: bf16
  proj_min: 3.0
  l_min: 45.0
  feather_sigma: 2.0
  gate_lo: 0.70
  gate_hi: 0.95

foreground:
  enabled: true
  method: ml
  ml_regularization: 0.00001

despill:
  enabled: false