Moving subjects over known backgrounds, shipped with the exact alpha matte used to composite them, for scoring background removal and green-screen keying frame by frame.
Each card starts with one representative test file. Choose a use case, search, or filter to find a specific profile; a card’s variant menu contains its related samples.
4 test families · 12 available files · Page 1 of 1
Alpha
Video with a real per-pixel alpha channel: VP9 yuva420p in WebM, the one alpha path browsers decode natively. Composite it over a page background and the transparency is genuine, not a chroma key. Roughly 90% of each fra
Base Plates
A green disc and a red square orbiting the centre in antiphase over a grid. Hard edges and flat fills make the boundary unambiguous, so segmentation and tracking output can be scored against exact geometry rather than a
Matting
The same subject and the same alpha, composited over busy patterned: no chroma screen, which is the case a general background-removal model actually has to handle. Score the predicted alpha against the ground-truth matte
Segmentation
A three-level trimap derived from the instance masks: definite foreground, definite background, and a nine-pixel unknown band around every boundary. This is the input interactive matting and rotoscoping tools actually ta
