ROI feature extraction

[rongyua]

Hello, thank you very much for your contribution. In your paper, you mentioned using the UNI pre-trained encoder to extract features from histopathology ROI, and also provided sample code. What I want to know is whether the ROI needs to be segmented in advance or not. Using the whole WSI image as input, if an image has multiple ROIs, can you provide me with a code example, I will be grateful