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| import tkinter as tk
from tkinter import ttk, filedialog, messagebox
from PIL import Image, ImageTk, ImageFilter
import threading
import time
import os
try:
from rembg import remove, new_session
except ImportError:
messagebox.showerror("缺少依赖", "请先安装 rembg:\npip install rembg[cpu]")
raise
DEFAULT_MODEL = "u2net"
MAX_SIDE = 1024
class BackgroundRemoverApp:
def __init__(self, root):
self.root = root
self.root.title("AI 抠图工具")
self.root.geometry("1200x750")
self.root.minsize(900, 600)
self.original_image = None
self.result_image = None
self.result_image_with_bg = None
self.original_photo = None
self.result_photo = None
self.session = None
self._build_ui()
def _build_ui(self):
main_pane = ttk.PanedWindow(self.root, orient=tk.HORIZONTAL)
main_pane.pack(fill=tk.BOTH, expand=True, padx=5, pady=5)
left_frame = ttk.Frame(main_pane)
main_pane.add(left_frame, weight=1)
self.left_canvas = tk.Canvas(left_frame, bg="#f0f0f0",
highlightthickness=1, highlightbackground="#cccccc")
self.left_canvas.pack(fill=tk.BOTH, expand=True)
control_frame = ttk.LabelFrame(left_frame, text="操作面板", padding=8)
control_frame.pack(fill=tk.X, pady=(5, 0))
ttk.Button(control_frame, text="📂 打开图片",
command=self.open_image).grid(row=0, column=0, padx=4, pady=4, sticky="ew")
ttk.Button(control_frame, text="✂️ 开始抠图",
command=self.start_remove_bg).grid(row=0, column=1, padx=4, pady=4, sticky="ew")
ttk.Button(control_frame, text="💾 保存结果",
command=self.save_result).grid(row=0, column=2, padx=4, pady=4, sticky="ew")
ttk.Button(control_frame, text="🗑️ 清空",
command=self.clear_all).grid(row=0, column=3, padx=4, pady=4, sticky="ew")
ttk.Label(control_frame, text="边缘羽化:").grid(row=1, column=0, padx=4, pady=4, sticky="e")
self.feather_var = tk.IntVar(value=0)
ttk.Scale(control_frame, from_=0, to=20, orient=tk.HORIZONTAL,
variable=self.feather_var).grid(row=1, column=1, padx=4, pady=4, sticky="ew")
self.alpha_matting_var = tk.BooleanVar(value=False)
ttk.Checkbutton(control_frame, text="Alpha Matting（精细边缘，慢）",
variable=self.alpha_matting_var).grid(
row=1, column=2, columnspan=2, padx=4, pady=4, sticky="w")
ttk.Label(control_frame, text="背景:").grid(row=2, column=0, padx=4, pady=4, sticky="e")
self.bg_mode = tk.StringVar(value="transparent")
bg_combo = ttk.Combobox(control_frame, textvariable=self.bg_mode,
values=["transparent", "white", "black", "green", "blue"],
state="readonly", width=15)
bg_combo.grid(row=2, column=1, padx=4, pady=4, sticky="w")
bg_combo.bind("<<ComboboxSelected>>", lambda e: self.apply_background())
control_frame.columnconfigure(0, weight=0)
control_frame.columnconfigure(1, weight=1)
control_frame.columnconfigure(2, weight=1)
control_frame.columnconfigure(3, weight=1)
right_frame = ttk.Frame(main_pane)
main_pane.add(right_frame, weight=1)
self.right_canvas = tk.Canvas(right_frame, bg="#f0f0f0",
highlightthickness=1, highlightbackground="#cccccc")
self.right_canvas.pack(fill=tk.BOTH, expand=True)
self.left_canvas.bind("<Configure>", lambda e: self.redraw("left"))
self.right_canvas.bind("<Configure>", lambda e: self.redraw("right"))
self.status_var = tk.StringVar(value="就绪 - 请打开一张图片")
status_bar = ttk.Label(self.root, textvariable=self.status_var,
relief=tk.SUNKEN, anchor=tk.W, padding=(6, 2))
status_bar.pack(fill=tk.X, side=tk.BOTTOM)
def set_status(self, msg):
self.status_var.set(msg)
self.root.update_idletasks()
def get_session(self):
"""复用 session，只加载一次 u2net 模型"""
if self.session is None:
self.set_status(f"正在加载模型 {DEFAULT_MODEL} ...")
t0 = time.time()
self.session = new_session(DEFAULT_MODEL)
print(f"[调试] 模型 {DEFAULT_MODEL} 加载耗时: {time.time() - t0:.2f}s")
return self.session
def open_image(self):
path = filedialog.askopenfilename(
title="选择图片",
filetypes=[("图片文件", "*.png *.jpg *.jpeg *.bmp *.webp"), ("所有文件", "*.*")]
)
if not path:
return
try:
self.original_image = Image.open(path).convert("RGBA")
self.result_image = None
self.result_image_with_bg = None
self.redraw("left")
self.redraw("right")
self.set_status(f"已加载：{os.path.basename(path)} 尺寸：{self.original_image.size}")
except Exception as e:
messagebox.showerror("错误", f"无法打开图片：\n{e}")
self.set_status("加载失败")
def start_remove_bg(self):
if self.original_image is None:
messagebox.showwarning("提示", "请先打开一张图片")
self.set_status("请先打开图片")
return
threading.Thread(target=self._do_remove_bg, daemon=True).start()
def _do_remove_bg(self):
try:
t_start = time.time()
self.set_status("正在抠图中，请稍候...")
img = self.original_image.copy()
orig_size = img.size
print(f"[调试] 原图尺寸: {orig_size}")
if max(img.size) > MAX_SIDE:
ratio = MAX_SIDE / max(img.size)
img = img.resize(
(int(img.width * ratio), int(img.height * ratio)),
Image.LANCZOS
)
print(f"[调试] 缩放至: {img.size}")
feather = self.feather_var.get()
if feather > 0:
alpha = img.split()[-1]
alpha = alpha.filter(ImageFilter.GaussianBlur(feather))
img = img.copy()
img.putalpha(alpha)
session = self.get_session()
kwargs = {"alpha_matting": self.alpha_matting_var.get()}
if kwargs["alpha_matting"]:
kwargs.update({
"alpha_matting_foreground_threshold": 240,
"alpha_matting_background_threshold": 10,
"alpha_matting_erode_size": 10,
})
t1 = time.time()
result = remove(img, session=session, **kwargs)
print(f"[调试] rembg 推理耗时: {time.time() - t1:.2f}s "
f"(alpha_matting={kwargs['alpha_matting']})")
if result.size != orig_size:
result = result.resize(orig_size, Image.LANCZOS)
self.result_image = result
self.result_image_with_bg = None
self.apply_background()
elapsed = time.time() - t_start
self.set_status(f"抠图完成 ✔ 总耗时 {elapsed:.2f}s")
except Exception as e:
import traceback
traceback.print_exc()
self.set_status(f"抠图失败：{e}")
messagebox.showerror("抠图失败", str(e))
def apply_background(self):
if self.result_image is None:
return
mode = self.bg_mode.get()
if mode == "transparent":
self.result_image_with_bg = None
self.redraw("right")
self.set_status("显示：透明背景")
return
color_map = {
"white": (255, 255, 255, 255),
"black": (0, 0, 0, 255),
"green": (0, 177, 64, 255),
"blue": (0, 71, 187, 255),
}
bg = Image.new("RGBA", self.result_image.size, color_map[mode])
bg.alpha_composite(self.result_image)
self.result_image_with_bg = bg
self.redraw("right")
self.set_status(f"显示：{mode} 背景")
def save_result(self):
if self.result_image is None:
messagebox.showwarning("提示", "还没有抠图结果")
self.set_status("无可保存内容")
return
path = filedialog.asksaveasfilename(
title="保存抠图结果",
defaultextension=".png",
filetypes=[("PNG（含透明）", "*.png"), ("JPEG", "*.jpg")]
)
if not path:
return
try:
if self.bg_mode.get() != "transparent" and self.result_image_with_bg is not None:
img = self.result_image_with_bg
else:
img = self.result_image
if path.lower().endswith((".jpg", ".jpeg")):
img = img.convert("RGB")
img.save(path)
self.set_status(f"已保存：{path}")
except Exception as e:
messagebox.showerror("保存失败", str(e))
self.set_status("保存失败")
def clear_all(self):
self.original_image = None
self.result_image = None
self.result_image_with_bg = None
self.original_photo = None
self.result_photo = None
self.left_canvas.delete("all")
self.right_canvas.delete("all")
self.set_status("已清空")
def redraw(self, which):
if which == "left":
canvas = self.left_canvas
img = self.original_image
photo_attr = "original_photo"
else:
canvas = self.right_canvas
if self.bg_mode.get() != "transparent" and self.result_image_with_bg is not None:
img = self.result_image_with_bg
else:
img = self.result_image
photo_attr = "result_photo"
canvas.delete("all")
if img is None:
canvas.create_text(canvas.winfo_width() // 2, canvas.winfo_height() // 2,
text="暂无图片", fill="#888", font=("微软雅黑", 14))
return
cw = max(canvas.winfo_width(), 10)
ch = max(canvas.winfo_height(), 10)
iw, ih = img.size
scale = min(cw / iw, ch / ih, 1.0)
new_size = (max(int(iw * scale), 1), max(int(ih * scale), 1))
resized = img.resize(new_size, Image.LANCZOS)
photo = ImageTk.PhotoImage(resized)
setattr(self, photo_attr, photo)
canvas.create_image(cw // 2, ch // 2, image=photo, anchor=tk.CENTER)
if __name__ == "__main__":
root = tk.Tk()
app = BackgroundRemoverApp(root)
root.mainloop()
|
