remove background with U-2-Net is not as expected,what should I do

[skyyan2000]

Using U-2-Net for image background removal, the effect is not up to expectations, what should I do

the source

the post-processing

I want the end result

Thanks for your suggestions

[s25140]

Maybe the pre-trained U2Net model is not good enough for such tiny lines. You can try to train the model on your own dataset.
However, looks like removing white pixels from your image should work fine. Have you tried this approach?