I am finding several unexpected artifacts in the logit masks returned by sam_vit_h_4b8939. - exhibiting the pattern of a repeated rectangle (see image 1) - there are margins at the edge of the image that are anomalously extreme logit values (see image 2) I am wondering if there is something about the way this model is trained or inferenced that causes this pattern. ### Image 1 The repeating rectangle <img width="50" alt="Screen Shot 2023-05-18 at 2 58 00 PM" src="https://github.com/facebookresearch/segment-anything/assets/85517686/3cf19bf1-70ea-408d-b055-8ac59907a6b2"> ### Image 2 On the left image boundary, there is a 10 pixel wide negative strip that should be positive. <img width="416" alt="Screen Shot 2023-05-18 at 3 01 29 PM" src="https://github.com/facebookresearch/segment-anything/assets/85517686/f69695d8-9095-4bb7-b688-e1cd0c3d0528">