OOD-GrainSet-Wheat  train/test.txt and category information

 OOD-GrainSet-wheat for ECAI2023 (Identifying the Defective: Detecting Damaged Grains for Cereal Appearance Inspection)

- num2category.text   -- the number of folder corresponding to the category of grain type

- wheat_set1_train.txt wheat_set1_test.txt   train/test files for set1, indicating the image names used for training/test

- wheat_set2_train.txt wheat_set2_test.txt   train/test files for set2, indicating the image names used for training/test