extensions/stable-diffusion-webui-rembg/scripts/postprocessing_rembg.py

from modules import scripts_postprocessing
import gradio as gr

from modules.ui_components import FormRow
import rembg

models = [
    "None",
    "u2net",
    "u2netp",
    "u2net_human_seg",
    "u2net_cloth_seg",
    "silueta",
    "isnet-general-use",
    "isnet-anime",
]

class ScriptPostprocessingUpscale(scripts_postprocessing.ScriptPostprocessing):
    name = "Rembg"
    order = 20000
    model = None

    def ui(self):
        with FormRow():
            model = gr.Dropdown(label="Remove background", choices=models, value="None")
            return_mask = gr.Checkbox(label="Return mask", value=False)
            alpha_matting = gr.Checkbox(label="Alpha matting", value=False)

        with FormRow(visible=False) as alpha_mask_row:
            alpha_matting_erode_size = gr.Slider(label="Erode size", minimum=0, maximum=40, step=1, value=10)
            alpha_matting_foreground_threshold = gr.Slider(label="Foreground threshold", minimum=0, maximum=255, step=1, value=240)
            alpha_matting_background_threshold = gr.Slider(label="Background threshold", minimum=0, maximum=255, step=1, value=10)

        alpha_matting.change(
            fn=lambda x: gr.update(visible=x),
            inputs=[alpha_matting],
            outputs=[alpha_mask_row],
        )

        return {
            "model": model,
            "return_mask": return_mask,
            "alpha_matting": alpha_matting,
            "alpha_matting_foreground_threshold": alpha_matting_foreground_threshold,
            "alpha_matting_background_threshold": alpha_matting_background_threshold,
            "alpha_matting_erode_size": alpha_matting_erode_size,
        }

    def process(self, pp: scripts_postprocessing.PostprocessedImage, model, return_mask, alpha_matting, alpha_matting_foreground_threshold, alpha_matting_background_threshold, alpha_matting_erode_size):
        if not model or model == "None":
            return

        pp.image = rembg.remove(
            pp.image,
            session=rembg.new_session(model),
            only_mask=return_mask,
            alpha_matting=alpha_matting,
            alpha_matting_foreground_threshold=alpha_matting_foreground_threshold,
            alpha_matting_background_threshold=alpha_matting_background_threshold,
            alpha_matting_erode_size=alpha_matting_erode_size,
        )

        pp.info["Rembg"] = model