Results 3 issues of skyyan

Using U-2-Net for image background removal, the effect is not up to expectations, what should I do the source ![a1](https://github.com/user-attachments/assets/5b4c9006-5810-427f-a777-51420c39a06c) the post-processing ![a1-m](https://github.com/user-attachments/assets/326e6c71-94e4-4f05-8bb9-b2d0957c3626) ![a1-tt](https://github.com/user-attachments/assets/b025c878-9f36-4a75-a182-3a8c87cdb2db) I want the end result ![a1-removebg](https://github.com/user-attachments/assets/487246b1-fa58-4e5d-82f8-12d2515902f4)...

source image ![a1](https://github.com/user-attachments/assets/22609444-0f9f-485c-bd5b-650853e9f869)