Papers › Instance Shadow Detection
Instance Shadow Detection
Tianyu Wang, Xiao-Wei Hu, Qiong Wang, Pheng-Ann Heng, Chi-Wing Fu
Instance shadow detection is a brand new problem, aiming to find shadow instances paired with object instances. To approach it, we first prepare a new dataset called SOBA, named after Shadow-OBject Association, with 3,623 pairs of shadow and object instances in 1,000 photos, each with individual labeled masks. Second, we design LISA, named after Light-guided Instance Shadow-object Association, an end-to-end framework to automatically predict the shadow and object instances, together with the shadow-object associations and light direction. Then, we pair up the predicted shadow and object instances, and match them with the predicted shadow-object associations to generate the final results. In our evaluations, we formulate a new metric named the shadow-object average precision to measure the performance of our results. Further, we conducted various experiments and demonstrate our method's applicability on light direction estimation and photo editing.
In Syntology Open this paper in Syntology's Atlas, the map of the papers in Syntology's graph and their citations.
Code
Repository list and official/mentioned flags are the archive's, frozen 2025-07-28. Reachability, where shown, is from one Syntology probe window (2026-09-16 to 2026-09-18); repositories not probed show nothing. GitHub stars are not tracked.
Code Syntology ran Syntology
Not run by Syntology. Nothing on this page verifies that the listed code works.
Tasks
Datasets
Introduced by this paper, per the archive.
Results from the paper archive 2025-07-28
| Task | Dataset | Model | Metric | Value | Rank at snapshot | Leaderboard | Report |
|---|---|---|---|---|---|---|---|
| Instance Shadow Detection | SOBA | LISA (CVPR 2020) | Asso. AP_bbox | 50.4 | #3 of 3 | Archive leaderboard | report |
| Instance Shadow Detection | SOBA | LISA (CVPR 2020) | Asso. AP_segm | 42.7 | #3 of 3 | Archive leaderboard | report |
| Instance Shadow Detection | SOBA | LISA (CVPR 2020) | Bounding Box SOAP | 21.9 | #3 of 3 | Archive leaderboard | report |
| Instance Shadow Detection | SOBA | LISA (CVPR 2020) | Instance AP_bbox | 38.2 | #3 of 3 | Archive leaderboard | report |
| Instance Shadow Detection | SOBA | LISA (CVPR 2020) | Instance AP_segm | 39.7 | #3 of 3 | Archive leaderboard | report |
| Instance Shadow Detection | SOBA | LISA (CVPR 2020) | mask SOAP | 23.5 | #3 of 3 | Archive leaderboard | report |
Ranks are positions in the archive's leaderboards as they stood at the 2025-07-28 snapshot. Results published since then are not among these rows, so a rank here is not a current standing.
Report a problem or propose a change · a person checks every report against the paper or source before anything changes; decisions are listed on /corrections