reference_ for_ Mmdetection.ipynb--Reasoning effect question

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Hello@fcakyon, I am using/sahi main/demo/reference_ for_ Mmdetection.ipynb is used to infer my mmdet model. When I use my mmdet model and the official dataset of Coco, Sahi's inference performance improves. However, when I use my own dataset (with only one category and the original image being a grayscale image), Sahi's inference performance is not as good as the inference in mmdet. What is the reason for this? Do you need to adjust any parameters? We look forward to your reply.