Segmenting Skin Biopsy Images with Coarse and Sparse Annotations using U-Net.

"code availability our code is open-source and available at https://github com/shimaxy/sparse_annotation_segmentation ."

"Declarations Ethics ApprovalNot applicable. Consent to Participate.Not applicable. Consent for Publication.Not applicable. Conflict of InterestThe authors declare no competing interests. Conflict of Interest The authors declare no competing interests."

"Funding The research reported in this study was supported by grants R01CA200690 and U01CA231782 from the National Cancer Institute of the National Institutes of Health, 622600 from the Melanoma Research Alliance, and W81XWH-20–1-0798 from the US Department of Defense. The funders had no role in the design and conduct of the study, collection, management, analysis, and interpretation of the data, preparation, review, or approval of the manuscript nor decision to submit the manuscript for publication."