Segmentation masks for breech and firing-pin areas for a NIST dataset of firearm cartridge case Images

NIST has published a set of 1,703 images of fired cartridge cases using several firearms. This dataset contains three masks for each image: one for the firing pin, another for the breech face, and the third for the firing pin and breech face together. The masks are ready to use for training semantic segmentation machine learning models. The data has been split into 72%, 8% and 20% respectively for training, validation and testing. The file name of each mask contains the name of the original cartridge case image from NIST. A more detail description is given in the Readme.docx file.