1051 lines
45 KiB
Python
1051 lines
45 KiB
Python
"""
|
||
人像分割模块
|
||
使用 MODNet/RMBG 进行人物抠图
|
||
"""
|
||
|
||
import os
|
||
import sys
|
||
import cv2
|
||
import numpy as np
|
||
from pathlib import Path
|
||
from typing import Optional, Tuple, Dict, Any
|
||
|
||
# ⚠️ 诊断输出：验证 segment.py 导入开始
|
||
print("[SEGMENT.PY] Starting import...", file=sys.stderr, flush=True)
|
||
|
||
try:
|
||
from loguru import logger
|
||
print("[SEGMENT.PY] ✅ loguru imported successfully", file=sys.stderr, flush=True)
|
||
except ImportError as e:
|
||
print(f"[SEGMENT.PY] ⚠️ loguru import failed: {e}, using print instead", file=sys.stderr, flush=True)
|
||
# Fallback logger that uses print
|
||
class logger:
|
||
@staticmethod
|
||
def info(msg, *args, **kwargs):
|
||
print(f"[INFO] {msg}", file=sys.stderr)
|
||
@staticmethod
|
||
def warning(msg, *args, **kwargs):
|
||
print(f"[WARN] {msg}", file=sys.stderr)
|
||
@staticmethod
|
||
def error(msg, *args, **kwargs):
|
||
print(f"[ERROR] {msg}", file=sys.stderr)
|
||
@staticmethod
|
||
def debug(msg, *args, **kwargs):
|
||
print(f"[DEBUG] {msg}", file=sys.stderr)
|
||
|
||
# 检查cv2是否可用
|
||
try:
|
||
import cv2
|
||
CV2_AVAILABLE = True
|
||
except ImportError:
|
||
CV2_AVAILABLE = False
|
||
logger.warning("OpenCV不可用，某些功能可能受限")
|
||
|
||
# 尝试导入AI库，如果不可用则使用简化实现
|
||
try:
|
||
from rembg import remove, new_session
|
||
REMBG_AVAILABLE = True
|
||
except ImportError:
|
||
REMBG_AVAILABLE = False
|
||
logger.warning("rembg不可用，使用简化的抠图方法")
|
||
|
||
try:
|
||
import torch
|
||
import torch.nn as nn
|
||
from torchvision import transforms
|
||
PYTORCH_AVAILABLE = True
|
||
except ImportError:
|
||
PYTORCH_AVAILABLE = False
|
||
logger.warning("PyTorch不可用，高级AI功能受限")
|
||
|
||
# 尝试导入MODNet（如果可用）
|
||
MODNET_AVAILABLE = False
|
||
try:
|
||
# 尝试导入MODNet（可能有多种实现方式）
|
||
try:
|
||
from modnet import MODNet as MODNetLib
|
||
MODNET_AVAILABLE = True
|
||
logger.info("MODNet库可用（modnet包）")
|
||
except ImportError:
|
||
try:
|
||
# 尝试从本地MODNet实现导入
|
||
import sys
|
||
# 尝试多个可能的路径
|
||
possible_paths = [
|
||
Path(__file__).parent.parent / "MODNet",
|
||
Path(__file__).parent.parent / "MODNet-master",
|
||
]
|
||
for modnet_path in possible_paths:
|
||
if modnet_path.exists():
|
||
sys.path.insert(0, str(modnet_path))
|
||
try:
|
||
from src.models.modnet import MODNet as MODNetLib
|
||
MODNET_AVAILABLE = True
|
||
logger.info(f"MODNet库可用（本地实现: {modnet_path.name}）")
|
||
break
|
||
except ImportError:
|
||
# 尝试其他可能的导入路径
|
||
try:
|
||
from models.modnet import MODNet as MODNetLib
|
||
MODNET_AVAILABLE = True
|
||
logger.info(f"MODNet库可用（本地实现: {modnet_path.name}，models路径）")
|
||
break
|
||
except ImportError:
|
||
continue
|
||
except Exception as e:
|
||
logger.debug(f"MODNet本地导入失败: {e}")
|
||
except Exception as e:
|
||
logger.debug(f"MODNet不可用: {e}")
|
||
|
||
try:
|
||
from .utils import ensure_dir, save_image
|
||
print("[SEGMENT.PY] ✅ utils module imported successfully", file=sys.stderr, flush=True)
|
||
except ImportError as e:
|
||
print(f"[SEGMENT.PY] ❌ Failed to import utils: {e}", file=sys.stderr, flush=True)
|
||
raise
|
||
|
||
print("[SEGMENT.PY] ✅ Module import completed successfully", file=sys.stderr, flush=True)
|
||
|
||
|
||
class PersonSegmenter:
|
||
"""人像分割器"""
|
||
|
||
def __init__(self, model_name: str = "u2net"):
|
||
"""
|
||
初始化分割器
|
||
|
||
Args:
|
||
model_name: 使用的模型名称
|
||
- "u2net": U2Net模型（默认，效果较好）
|
||
- "u2netp": U2Net轻量版
|
||
- "silueta": Silueta模型
|
||
- "isnet": ISNet模型
|
||
- "modnet": MODNet模型（专门用于人像，需要PyTorch和MODNet库）
|
||
- "simple": 简化的抠图方法（当AI库不可用时）
|
||
"""
|
||
self.model_name = model_name
|
||
self.session = None
|
||
self.modnet_model = None
|
||
self.use_modnet = False
|
||
|
||
# 检查是否使用MODNet
|
||
if model_name == "modnet":
|
||
if MODNET_AVAILABLE and PYTORCH_AVAILABLE:
|
||
self.use_modnet = True
|
||
self._load_modnet()
|
||
else:
|
||
logger.warning("MODNet不可用（需要PyTorch和MODNet库），使用rembg作为后备")
|
||
self.use_simple_method = not REMBG_AVAILABLE or model_name == "simple"
|
||
if not self.use_simple_method:
|
||
self._load_model()
|
||
else:
|
||
self.use_simple_method = not REMBG_AVAILABLE or model_name == "simple"
|
||
if not self.use_simple_method:
|
||
self._load_model()
|
||
|
||
def _load_model(self):
|
||
"""加载rembg模型 - 支持本地模型路径"""
|
||
try:
|
||
logger.info(f"加载人像分割模型: {self.model_name}")
|
||
|
||
# 关键修复：优先使用本地打包的模型
|
||
local_model_path = self._get_local_model_path()
|
||
|
||
if local_model_path and os.path.exists(local_model_path):
|
||
logger.info(f"✅ 使用本地模型文件: {local_model_path}")
|
||
# 设置环境变量，让 rembg 使用本地模型目录
|
||
cache_dir = os.path.dirname(local_model_path)
|
||
os.environ['U2NET_HOME'] = cache_dir
|
||
logger.info(f"设置 U2NET_HOME = {cache_dir}")
|
||
|
||
# 使用 rembg 加载模型（会从 U2NET_HOME 读取）
|
||
self.session = new_session(self.model_name)
|
||
else:
|
||
# 回退到 rembg 的默认行为（尝试从网络下载）
|
||
logger.warning(f"⚠️ 未找到本地模型，尝试使用默认下载方式")
|
||
cache_dir = self._get_cache_dir()
|
||
os.environ['U2NET_HOME'] = cache_dir
|
||
logger.info(f"设置缓存目录: {cache_dir}")
|
||
self.session = new_session(self.model_name)
|
||
|
||
logger.info(f"人像分割模型加载成功: {self.model_name}")
|
||
logger.info(f"Session类型: {type(self.session)}")
|
||
except Exception as e:
|
||
logger.error(f"❌ 加载人像分割模型失败: {e}")
|
||
logger.error(f"尝试加载的模型: {self.model_name}")
|
||
import traceback
|
||
logger.error(traceback.format_exc())
|
||
raise
|
||
|
||
def _get_local_model_path(self) -> Optional[str]:
|
||
"""获取本地模型文件路径 - 自动识别开发/打包环境"""
|
||
model_filename = f"{self.model_name}.onnx" if self.model_name in ["u2net", "u2netp", "u2net_human_seg", "silueta", "isnet"] else "u2net.onnx"
|
||
|
||
# 🔧 修复：支持ASAR打包环境，优先使用APP_ROOT环境变量
|
||
app_root = os.environ.get('APP_ROOT', None)
|
||
|
||
possible_paths = []
|
||
|
||
if app_root:
|
||
# 打包环境：优先使用 resources-bundles/models
|
||
possible_paths.append(Path(app_root) / "resources-bundles" / "models" / model_filename)
|
||
# 打包环境：使用APP_ROOT定位资源（回退）
|
||
possible_paths.append(Path(app_root) / "extra" / "common" / "models" / model_filename)
|
||
logger.info(f"🔧 打包环境检测: APP_ROOT={app_root}")
|
||
|
||
# 添加其他可能的路径（开发环境和回退）
|
||
possible_paths.extend([
|
||
# 打包后的路径（生产环境 - 回退）
|
||
Path(__file__).parent.parent.parent / "extra" / "common" / "models" / model_filename,
|
||
# 开发环境路径 1
|
||
Path(__file__).parent.parent / "models" / model_filename,
|
||
# 开发环境路径 2（electron/resources/extra/common/models）
|
||
Path(__file__).parent.parent.parent / "electron" / "resources" / "extra" / "common" / "models" / model_filename,
|
||
# 备用路径
|
||
Path(__file__).parent.parent.parent / "models" / model_filename,
|
||
])
|
||
|
||
logger.info(f"🔍 搜索本地模型: {model_filename}")
|
||
for i, path in enumerate(possible_paths, 1):
|
||
exists = path.exists()
|
||
logger.debug(f" 尝试路径 {i}: {path} (存在: {exists})")
|
||
if exists:
|
||
size_mb = path.stat().st_size / (1024 * 1024)
|
||
logger.info(f"✅ 找到本地模型: {path} ({size_mb:.1f}MB)")
|
||
return str(path)
|
||
else:
|
||
logger.debug(f" ❌ 路径不存在: {path}")
|
||
|
||
logger.warning(f"⚠️ 未找到本地模型文件: {model_filename}")
|
||
logger.warning(f" 已检查{len(possible_paths)}个路径，全部不存在")
|
||
logger.warning(f" APP_ROOT环境变量: {app_root}")
|
||
logger.warning(f" __file__路径: {__file__}")
|
||
return None
|
||
|
||
def _get_cache_dir(self) -> str:
|
||
"""获取模型缓存目录"""
|
||
# 优先使用应用资源目录
|
||
possible_cache_dirs = [
|
||
Path(__file__).parent.parent.parent / "extra" / "common" / "models",
|
||
Path(__file__).parent.parent / "models",
|
||
]
|
||
|
||
for cache_dir in possible_cache_dirs:
|
||
try:
|
||
cache_dir.mkdir(parents=True, exist_ok=True)
|
||
logger.info(f"使用缓存目录: {cache_dir}")
|
||
return str(cache_dir)
|
||
except Exception as e:
|
||
logger.warning(f"无法创建缓存目录 {cache_dir}: {e}")
|
||
continue
|
||
|
||
# 最后回退到用户主目录
|
||
from pathlib import Path
|
||
fallback_dir = Path.home() / ".u2net"
|
||
fallback_dir.mkdir(parents=True, exist_ok=True)
|
||
logger.info(f"使用回退缓存目录: {fallback_dir}")
|
||
return str(fallback_dir)
|
||
|
||
def _load_modnet(self):
|
||
"""加载MODNet模型"""
|
||
try:
|
||
logger.info("加载MODNet人像分割模型...")
|
||
if not MODNET_AVAILABLE or not PYTORCH_AVAILABLE:
|
||
logger.warning("MODNet不可用（需要PyTorch和MODNet库），使用rembg作为后备")
|
||
self.use_modnet = False
|
||
self.use_simple_method = not REMBG_AVAILABLE
|
||
if not self.use_simple_method:
|
||
self._load_model()
|
||
return
|
||
|
||
# 查找预训练模型文件（支持多个可能的位置）
|
||
possible_paths = [
|
||
# pretrained目录下
|
||
Path(__file__).parent.parent / "MODNet-master" / "pretrained" / "modnet_webcam_portrait_matting.ckpt",
|
||
Path(__file__).parent.parent / "MODNet-master" / "pretrained" / "modnet_photographic_portrait_matting.ckpt",
|
||
Path(__file__).parent.parent / "MODNet" / "pretrained" / "modnet_webcam_portrait_matting.ckpt",
|
||
Path(__file__).parent.parent / "MODNet" / "pretrained" / "modnet_photographic_portrait_matting.ckpt",
|
||
# MODNet-master根目录下（用户可能直接放在这里）
|
||
Path(__file__).parent.parent / "MODNet-master" / "modnet_webcam_portrait_matting.ckpt",
|
||
Path(__file__).parent.parent / "MODNet-master" / "modnet_photographic_portrait_matting.ckpt",
|
||
Path(__file__).parent.parent / "MODNet" / "modnet_webcam_portrait_matting.ckpt",
|
||
Path(__file__).parent.parent / "MODNet" / "modnet_photographic_portrait_matting.ckpt",
|
||
]
|
||
|
||
ckpt_path = None
|
||
for path in possible_paths:
|
||
if path.exists():
|
||
ckpt_path = path
|
||
logger.info(f"找到MODNet预训练模型: {ckpt_path}")
|
||
break
|
||
|
||
if ckpt_path is None:
|
||
logger.warning("未找到MODNet预训练模型，使用rembg作为后备")
|
||
logger.info("请下载预训练模型到 MODNet-master/pretrained/ 目录")
|
||
logger.info("下载地址: https://github.com/ZHKKKe/MODNet/releases")
|
||
self.use_modnet = False
|
||
self.use_simple_method = not REMBG_AVAILABLE
|
||
if not self.use_simple_method:
|
||
self._load_model()
|
||
return
|
||
|
||
# 创建MODNet模型
|
||
self.modnet_model = MODNetLib(backbone_pretrained=False)
|
||
|
||
# 加载预训练权重
|
||
device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
|
||
if device.type == 'cpu':
|
||
weights = torch.load(str(ckpt_path), map_location=device)
|
||
else:
|
||
weights = torch.load(str(ckpt_path))
|
||
|
||
# 处理权重（可能包含 'module.' 前缀）
|
||
if any(k.startswith('module.') for k in weights.keys()):
|
||
weights = {k.replace('module.', ''): v for k, v in weights.items()}
|
||
|
||
self.modnet_model.load_state_dict(weights, strict=False)
|
||
self.modnet_model.eval()
|
||
self.modnet_model = self.modnet_model.to(device)
|
||
self.modnet_device = device
|
||
self.modnet_ref_size = 512 # MODNet的标准输入尺寸
|
||
self.use_modnet = True # 确认启用MODNet
|
||
|
||
logger.info(f"MODNet模型加载成功，设备: {device}")
|
||
|
||
except Exception as e:
|
||
logger.error(f"加载MODNet模型失败: {e}")
|
||
import traceback
|
||
logger.error(traceback.format_exc())
|
||
logger.info("使用rembg作为后备方案")
|
||
self.use_modnet = False
|
||
self.use_simple_method = not REMBG_AVAILABLE
|
||
if not self.use_simple_method:
|
||
self._load_model()
|
||
|
||
def segment_person(self, image: np.ndarray,
|
||
return_mask: bool = False) -> Tuple[np.ndarray, Optional[np.ndarray]]:
|
||
"""
|
||
进行人像分割
|
||
|
||
Args:
|
||
image: 输入图像 (BGR格式)
|
||
return_mask: 是否返回mask
|
||
|
||
Returns:
|
||
(分割后的图像, mask) 或 (分割后的图像, None)
|
||
"""
|
||
try:
|
||
if self.use_modnet:
|
||
return self._segment_with_modnet(image, return_mask)
|
||
elif self.use_simple_method:
|
||
return self._simple_segment_person(image, return_mask)
|
||
else:
|
||
# 转换颜色空间 BGR -> RGB
|
||
if image.shape[2] == 3:
|
||
rgb_image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
|
||
else:
|
||
rgb_image = image
|
||
|
||
# 使用rembg进行分割，启用后处理以提高精度
|
||
# post_process_mask=True 会自动优化mask边缘
|
||
# alpha_matting=True 可以改善边缘质量（提高精度，但速度较慢）
|
||
# 针对低对比度图像（如浅色衣服+浅色背景），调整alpha_matting参数：
|
||
# - foreground_threshold: 200（从240降低，更宽松地识别前景）
|
||
# - background_threshold: 20（从10提高，更严格地排除背景）
|
||
# - erode_size: 8（从10减小，保留更多边缘细节）
|
||
logger.info(f"使用模型 {self.model_name} 进行人像分割，启用后处理以提高精度（优化低对比度场景）")
|
||
output = remove(
|
||
rgb_image,
|
||
session=self.session,
|
||
post_process_mask=True,
|
||
alpha_matting=True, # 启用alpha_matting以提高边缘精度
|
||
alpha_matting_foreground_threshold=200, # 降低阈值，更宽松地识别前景（适合低对比度）
|
||
alpha_matting_background_threshold=20, # 提高阈值，更严格地排除背景
|
||
alpha_matting_erode_size=8 # 减小腐蚀尺寸，保留更多边缘细节
|
||
)
|
||
logger.info(f"rembg分割完成，输出形状: {output.shape}, 模型: {self.model_name}")
|
||
|
||
# 如果需要返回mask，计算mask
|
||
mask = None
|
||
if return_mask:
|
||
# 从alpha通道提取mask
|
||
if output.shape[2] == 4:
|
||
mask = output[:, :, 3]
|
||
# 优化mask：形态学操作去除噪点
|
||
mask = self.refine_mask(mask)
|
||
else:
|
||
# 如果没有alpha通道，转换为灰度图作为mask
|
||
gray = cv2.cvtColor(output, cv2.COLOR_RGB2GRAY)
|
||
# 使用更低的阈值，确保捕获更多细节
|
||
_, mask = cv2.threshold(gray, 1, 255, cv2.THRESH_BINARY)
|
||
mask = self.refine_mask(mask)
|
||
|
||
# 转换回BGR格式
|
||
if output.shape[2] == 4:
|
||
bgr_output = cv2.cvtColor(output[:, :, :3], cv2.COLOR_RGB2BGR)
|
||
else:
|
||
bgr_output = cv2.cvtColor(output, cv2.COLOR_RGB2BGR)
|
||
|
||
return bgr_output, mask
|
||
|
||
except Exception as e:
|
||
logger.error(f"人像分割失败: {e}")
|
||
raise
|
||
|
||
def _simple_segment_person(self, image: np.ndarray,
|
||
return_mask: bool = False) -> Tuple[np.ndarray, Optional[np.ndarray]]:
|
||
"""
|
||
简化的背景去除方法（当AI库不可用时使用）
|
||
使用颜色距离和边缘检测的简单方法
|
||
"""
|
||
try:
|
||
# 确保numpy已导入（虽然文件顶部已导入，但这里再次确认）
|
||
import numpy as np
|
||
|
||
# 转换为HSV色彩空间，更容易处理颜色
|
||
if not CV2_AVAILABLE:
|
||
logger.warning("OpenCV不可用，无法进行简化抠图，返回原始图像")
|
||
return image, None
|
||
|
||
h, w = image.shape[:2]
|
||
|
||
# 方法1: 尝试使用GrabCut算法（更准确）
|
||
try:
|
||
# 创建初始mask：假设中心区域是前景（人物）
|
||
mask_gc = np.zeros((h, w), np.uint8)
|
||
|
||
# 改进的初始区域设置：
|
||
# 1. 中心区域标记为确定的前景（更大范围）
|
||
center_x, center_y = w // 2, h // 2
|
||
# 使用更大的初始区域（50% 而不是 33%）
|
||
rect_size_w = int(w * 0.4)
|
||
rect_size_h = int(h * 0.4)
|
||
mask_gc[center_y - rect_size_h:center_y + rect_size_h,
|
||
center_x - rect_size_w:center_x + rect_size_w] = cv2.GC_FGD
|
||
|
||
# 2. 中心区域周围标记为可能的前景
|
||
rect_size_w2 = int(w * 0.45)
|
||
rect_size_h2 = int(h * 0.45)
|
||
outer_mask = np.zeros((h, w), np.uint8)
|
||
outer_mask[center_y - rect_size_h2:center_y + rect_size_h2,
|
||
center_x - rect_size_w2:center_x + rect_size_w2] = 255
|
||
# 在可能前景区域中，排除已标记为确定前景的部分
|
||
mask_gc[(outer_mask == 255) & (mask_gc == 0)] = cv2.GC_PR_FGD
|
||
|
||
# 3. 边缘区域标记为确定的背景（更宽的边缘）
|
||
border = max(30, min(w, h) // 15) # 至少30像素，或图像尺寸的1/15
|
||
mask_gc[:border, :] = cv2.GC_BGD
|
||
mask_gc[-border:, :] = cv2.GC_BGD
|
||
mask_gc[:, :border] = cv2.GC_BGD
|
||
mask_gc[:, -border:] = cv2.GC_BGD
|
||
|
||
# 使用GrabCut算法，增加迭代次数以提高精度
|
||
bgd_model = np.zeros((1, 65), np.float64)
|
||
fgd_model = np.zeros((1, 65), np.float64)
|
||
|
||
# 第一次迭代：使用初始mask
|
||
cv2.grabCut(image, mask_gc, None, bgd_model, fgd_model, 10, cv2.GC_INIT_WITH_MASK)
|
||
|
||
# 第二次迭代：基于第一次结果继续优化
|
||
cv2.grabCut(image, mask_gc, None, bgd_model, fgd_model, 5, cv2.GC_EVAL)
|
||
|
||
# 提取前景mask（包括确定前景和可能前景）
|
||
mask = np.where((mask_gc == cv2.GC_FGD) | (mask_gc == cv2.GC_PR_FGD), 255, 0).astype(np.uint8)
|
||
|
||
# 检查mask的有效性
|
||
mask_area = np.count_nonzero(mask)
|
||
total_area = h * w
|
||
mask_ratio = mask_area / total_area
|
||
|
||
logger.info(f"使用GrabCut算法完成简化抠图 - mask占比: {mask_ratio:.2%} ({mask_area}/{total_area})")
|
||
|
||
# 如果mask太小（小于5%），可能是过度分割，尝试更宽松的设置
|
||
if mask_ratio < 0.05:
|
||
logger.warning(f"GrabCut结果mask过小 ({mask_ratio:.2%})，尝试更宽松的设置")
|
||
# 重新初始化，使用更宽松的前景区域
|
||
mask_gc = np.zeros((h, w), np.uint8)
|
||
rect_size_w = int(w * 0.5)
|
||
rect_size_h = int(h * 0.5)
|
||
mask_gc[center_y - rect_size_h:center_y + rect_size_h,
|
||
center_x - rect_size_w:center_x + rect_size_w] = cv2.GC_PR_FGD
|
||
border = max(20, min(w, h) // 20)
|
||
mask_gc[:border, :] = cv2.GC_BGD
|
||
mask_gc[-border:, :] = cv2.GC_BGD
|
||
mask_gc[:, :border] = cv2.GC_BGD
|
||
mask_gc[:, -border:] = cv2.GC_BGD
|
||
|
||
bgd_model = np.zeros((1, 65), np.float64)
|
||
fgd_model = np.zeros((1, 65), np.float64)
|
||
cv2.grabCut(image, mask_gc, None, bgd_model, fgd_model, 15, cv2.GC_INIT_WITH_MASK)
|
||
mask = np.where((mask_gc == cv2.GC_FGD) | (mask_gc == cv2.GC_PR_FGD), 255, 0).astype(np.uint8)
|
||
mask_ratio = np.count_nonzero(mask) / total_area
|
||
logger.info(f"宽松设置后mask占比: {mask_ratio:.2%}")
|
||
except Exception as e:
|
||
logger.warning(f"GrabCut算法失败，使用备用方法: {e}")
|
||
# 方法2: 改进的颜色距离方法
|
||
hsv = cv2.cvtColor(image, cv2.COLOR_BGR2HSV)
|
||
|
||
# 使用中心区域的颜色作为前景参考（假设人物在中心）
|
||
center_region = hsv[h//4:3*h//4, w//4:3*w//4]
|
||
if center_region.size > 0:
|
||
fg_color = np.mean(center_region.reshape(-1, 3), axis=0)
|
||
else:
|
||
fg_color = np.mean(hsv.reshape(-1, 3), axis=0)
|
||
|
||
# 计算边缘区域的平均颜色（作为背景参考）
|
||
border_region = np.concatenate([
|
||
hsv[:10, :].reshape(-1, 3),
|
||
hsv[-10:, :].reshape(-1, 3),
|
||
hsv[:, :10].reshape(-1, 3),
|
||
hsv[:, -10:].reshape(-1, 3)
|
||
], axis=0)
|
||
bg_color = np.mean(border_region, axis=0) if border_region.size > 0 else np.mean(hsv.reshape(-1, 3), axis=0)
|
||
|
||
# 计算每个像素到前景和背景的距离
|
||
hsv_float = hsv.astype(np.float32)
|
||
fg_dist = np.sqrt(np.sum((hsv_float - fg_color) ** 2, axis=2))
|
||
bg_dist = np.sqrt(np.sum((hsv_float - bg_color) ** 2, axis=2))
|
||
|
||
# 如果到前景的距离小于到背景的距离，则认为是前景
|
||
mask = np.where(fg_dist < bg_dist, 255, 0).astype(np.uint8)
|
||
|
||
logger.info("使用改进的颜色距离方法完成简化抠图")
|
||
|
||
# 形态学操作优化mask
|
||
kernel = np.ones((5, 5), np.uint8)
|
||
# 先闭运算填充小洞
|
||
mask = cv2.morphologyEx(mask, cv2.MORPH_CLOSE, kernel, iterations=2)
|
||
# 再开运算去除小噪点
|
||
mask = cv2.morphologyEx(mask, cv2.MORPH_OPEN, kernel, iterations=1)
|
||
|
||
# 找到最大连通区域（通常是人物主体）
|
||
num_labels, labels, stats, centroids = cv2.connectedComponentsWithStats(mask, connectivity=8)
|
||
if num_labels > 1:
|
||
# 找到面积最大的连通区域（排除背景，索引0）
|
||
largest_label = 1 + np.argmax(stats[1:, cv2.CC_STAT_AREA])
|
||
mask = np.where(labels == largest_label, 255, 0).astype(np.uint8)
|
||
|
||
# 轻微高斯模糊使边缘更自然
|
||
mask = cv2.GaussianBlur(mask, (5, 5), 1.0)
|
||
_, mask = cv2.threshold(mask, 127, 255, cv2.THRESH_BINARY)
|
||
|
||
# 创建输出图像
|
||
output = image.copy()
|
||
if output.shape[2] == 3:
|
||
# 添加alpha通道
|
||
alpha = mask
|
||
output = np.dstack([output, alpha])
|
||
|
||
logger.info("使用简化的抠图方法完成")
|
||
return output, mask if return_mask else None
|
||
|
||
except Exception as e:
|
||
logger.error(f"简化抠图失败: {e}")
|
||
import traceback
|
||
logger.error(traceback.format_exc())
|
||
# 返回原始图像
|
||
return image, None
|
||
|
||
def segment_and_composite(self, image: np.ndarray,
|
||
background_color: Tuple[int, int, int] = (255, 255, 255),
|
||
background_image: Optional[np.ndarray] = None) -> np.ndarray:
|
||
"""
|
||
分割并合成到新背景
|
||
|
||
Args:
|
||
image: 输入图像
|
||
background_color: 背景颜色 (BGR格式)
|
||
background_image: 背景图像，如果提供则使用图片背景
|
||
|
||
Returns:
|
||
合成后的图像
|
||
"""
|
||
segmented, mask = self.segment_person(image, return_mask=True)
|
||
|
||
if background_image is not None:
|
||
# 使用背景图片
|
||
result = background_image.copy()
|
||
# 调整背景图片大小以匹配segmented
|
||
if result.shape[:2] != segmented.shape[:2]:
|
||
result = cv2.resize(result, (segmented.shape[1], segmented.shape[0]))
|
||
else:
|
||
# 使用纯色背景
|
||
result = np.full_like(segmented, background_color)
|
||
|
||
# 如果有mask，进行透明合成
|
||
if mask is not None:
|
||
mask_normalized = mask.astype(float) / 255.0
|
||
mask_3ch = np.stack([mask_normalized] * 3, axis=2)
|
||
|
||
result = (segmented * mask_3ch + result * (1 - mask_3ch)).astype(np.uint8)
|
||
|
||
return result
|
||
|
||
def refine_mask(self, mask: np.ndarray) -> np.ndarray:
|
||
"""优化mask，提高人像分割精度"""
|
||
try:
|
||
if not CV2_AVAILABLE:
|
||
return mask
|
||
|
||
# 确保mask是uint8格式
|
||
if mask.dtype != np.uint8:
|
||
if mask.max() <= 1.0:
|
||
mask = (mask * 255).astype(np.uint8)
|
||
else:
|
||
mask = mask.astype(np.uint8)
|
||
|
||
# 使用自适应阈值而不是固定阈值，提高边缘精度
|
||
# 进一步减小高斯模糊强度以保留更多边缘细节（从(3,3),0.5降到(3,3),0.3）
|
||
mask_blurred = cv2.GaussianBlur(mask, (3, 3), 0.3)
|
||
|
||
# 使用OTSU自适应阈值，自动找到最佳阈值
|
||
_, mask_binary = cv2.threshold(mask_blurred, 0, 255, cv2.THRESH_BINARY + cv2.THRESH_OTSU)
|
||
|
||
# 形态学操作优化mask
|
||
# 使用较小的kernel，保持边缘细节
|
||
kernel_small = np.ones((3, 3), np.uint8)
|
||
kernel_medium = np.ones((5, 5), np.uint8)
|
||
|
||
# 先进行开运算去除小噪点（使用小kernel保持细节，减少迭代次数）
|
||
mask_cleaned = cv2.morphologyEx(mask_binary, cv2.MORPH_OPEN, kernel_small, iterations=1)
|
||
|
||
# 闭运算填充小洞（使用中等kernel，减少迭代次数以保留更多细节）
|
||
# 进一步减少迭代次数（从1降到0，或者完全移除闭运算）
|
||
mask_filled = cv2.morphologyEx(mask_cleaned, cv2.MORPH_CLOSE, kernel_medium, iterations=1)
|
||
|
||
# 使用轮廓检测找到最大连通区域（通常是人物）
|
||
# 这样可以去除背景中的小噪点
|
||
contours, _ = cv2.findContours(mask_filled, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
|
||
|
||
if len(contours) > 0:
|
||
# 找到最大的轮廓（通常是人物主体）
|
||
largest_contour = max(contours, key=cv2.contourArea)
|
||
|
||
# 创建新的mask，只保留最大轮廓
|
||
mask_refined = np.zeros_like(mask_filled)
|
||
cv2.fillPoly(mask_refined, [largest_contour], 255)
|
||
|
||
# 如果还有其他较大的轮廓（可能是手臂等），也保留
|
||
# 进一步降低阈值以保留更多细节（从2%降到1.5%，特别适合低对比度场景）
|
||
for contour in contours:
|
||
area = cv2.contourArea(contour)
|
||
# 保留面积大于最大轮廓1.5%的轮廓（进一步降低阈值以保留更多细节，适合低对比度场景）
|
||
if area > cv2.contourArea(largest_contour) * 0.015:
|
||
cv2.fillPoly(mask_refined, [contour], 255)
|
||
logger.debug(f"保留轮廓，面积: {area}, 占比: {area/cv2.contourArea(largest_contour)*100:.1f}%")
|
||
|
||
mask_filled = mask_refined
|
||
|
||
# 轻微的高斯模糊使边缘更自然（但保持清晰）
|
||
# 进一步减小模糊强度以保留更多边缘细节（从0.3降到0.2）
|
||
mask_smooth = cv2.GaussianBlur(mask_filled, (3, 3), 0.2)
|
||
|
||
# 最终二值化，使用更低的阈值以保留更多边缘细节（从127降到100）
|
||
_, mask_final = cv2.threshold(mask_smooth, 100, 255, cv2.THRESH_BINARY)
|
||
|
||
logger.info(f"mask优化完成 - 原始非零像素: {np.count_nonzero(mask)}, 优化后: {np.count_nonzero(mask_final)}")
|
||
|
||
return mask_final
|
||
|
||
except Exception as e:
|
||
logger.warning(f"mask优化失败: {e}")
|
||
import traceback
|
||
logger.warning(traceback.format_exc())
|
||
return mask
|
||
|
||
def generate_border_mask(self, mask: np.ndarray, border_width: int = 3) -> np.ndarray:
|
||
"""生成描边mask
|
||
|
||
Args:
|
||
mask: 原始mask
|
||
border_width: 描边宽度
|
||
|
||
Returns:
|
||
描边mask（只包含边缘区域）
|
||
"""
|
||
try:
|
||
if not CV2_AVAILABLE:
|
||
return mask
|
||
|
||
# 使用形态学操作生成描边
|
||
kernel_size = border_width * 2 + 1
|
||
kernel = np.ones((kernel_size, kernel_size), np.uint8)
|
||
|
||
# 膨胀操作
|
||
dilated = cv2.dilate(mask, kernel, iterations=1)
|
||
|
||
# 描边 = 膨胀后的mask - 原始mask
|
||
border_mask = cv2.subtract(dilated, mask)
|
||
|
||
return border_mask
|
||
|
||
except Exception as e:
|
||
logger.warning(f"生成描边mask失败: {e}")
|
||
return mask
|
||
|
||
def _segment_with_modnet(self, image: np.ndarray, return_mask: bool = False) -> Tuple[np.ndarray, Optional[np.ndarray]]:
|
||
"""使用MODNet进行人像分割"""
|
||
try:
|
||
if not PYTORCH_AVAILABLE or not MODNET_AVAILABLE or self.modnet_model is None:
|
||
logger.warning("MODNet不可用，使用rembg作为后备")
|
||
if not self.use_simple_method:
|
||
return self._segment_with_rembg(image, return_mask)
|
||
else:
|
||
return self._simple_segment_person(image, return_mask)
|
||
|
||
# 转换BGR到RGB
|
||
if image.shape[2] == 3:
|
||
rgb_image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
|
||
else:
|
||
rgb_image = image
|
||
|
||
# 预处理图像
|
||
# MODNet通常需要输入尺寸为512x512
|
||
h, w = rgb_image.shape[:2]
|
||
ref_size = self.modnet_ref_size
|
||
|
||
# 计算缩放比例，保持宽高比
|
||
if max(h, w) > ref_size:
|
||
scale = ref_size / max(h, w)
|
||
new_h, new_w = int(h * scale), int(w * scale)
|
||
else:
|
||
new_h, new_w = h, w
|
||
|
||
# 调整大小（必须是32的倍数，MODNet的要求）
|
||
new_h = (new_h // 32) * 32
|
||
new_w = (new_w // 32) * 32
|
||
if new_h < 32:
|
||
new_h = 32
|
||
if new_w < 32:
|
||
new_w = 32
|
||
|
||
rgb_resized = cv2.resize(rgb_image, (new_w, new_h), interpolation=cv2.INTER_LINEAR)
|
||
|
||
# 转换为PIL Image并归一化
|
||
from PIL import Image
|
||
pil_image = Image.fromarray(rgb_resized)
|
||
|
||
# MODNet的预处理（根据官方实现）
|
||
transform = transforms.Compose([
|
||
transforms.ToTensor(),
|
||
transforms.Normalize(mean=[0.5, 0.5, 0.5], std=[0.5, 0.5, 0.5])
|
||
])
|
||
|
||
input_tensor = transform(pil_image).unsqueeze(0).to(self.modnet_device)
|
||
|
||
# 推理
|
||
with torch.no_grad():
|
||
# MODNet的前向传播返回 (pred_semantic, pred_detail, pred_matte)
|
||
# 我们只需要 pred_matte（alpha matte）
|
||
_, _, pred_matte = self.modnet_model(input_tensor, inference=True)
|
||
|
||
# 处理输出
|
||
alpha = pred_matte.squeeze().cpu().numpy()
|
||
if len(alpha.shape) == 3:
|
||
alpha = alpha[0] # 取第一个通道
|
||
|
||
# 归一化到0-255
|
||
if alpha.max() <= 1.0:
|
||
alpha = (alpha * 255).astype(np.uint8)
|
||
else:
|
||
alpha = alpha.astype(np.uint8)
|
||
|
||
# 调整alpha大小回原始尺寸
|
||
if new_h != h or new_w != w:
|
||
alpha = cv2.resize(alpha, (w, h), interpolation=cv2.INTER_LINEAR)
|
||
|
||
# 创建RGBA图像
|
||
bgr_image = image.copy()
|
||
if bgr_image.shape[2] == 4:
|
||
bgr_image = bgr_image[:, :, :3]
|
||
|
||
# 应用alpha通道
|
||
rgba_output = np.dstack([bgr_image, alpha])
|
||
|
||
# 如果需要mask
|
||
mask = None
|
||
if return_mask:
|
||
mask = alpha.copy()
|
||
mask = self.refine_mask(mask)
|
||
|
||
logger.info(f"MODNet分割完成，输出形状: {rgba_output.shape}")
|
||
return rgba_output, mask
|
||
|
||
except Exception as e:
|
||
logger.error(f"MODNet分割失败: {e}")
|
||
import traceback
|
||
logger.error(traceback.format_exc())
|
||
# 回退到rembg
|
||
logger.info("MODNet失败，使用rembg作为后备")
|
||
if not self.use_simple_method:
|
||
return self._segment_with_rembg(image, return_mask)
|
||
else:
|
||
return self._simple_segment_person(image, return_mask)
|
||
|
||
def _segment_with_rembg(self, image: np.ndarray, return_mask: bool = False) -> Tuple[np.ndarray, Optional[np.ndarray]]:
|
||
"""使用rembg进行人像分割（内部方法）"""
|
||
# 转换颜色空间 BGR -> RGB
|
||
if image.shape[2] == 3:
|
||
rgb_image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
|
||
else:
|
||
rgb_image = image
|
||
|
||
# 使用rembg进行分割
|
||
logger.info(f"使用模型 {self.model_name} 进行人像分割，启用后处理以提高精度（优化低对比度场景）")
|
||
output = remove(
|
||
rgb_image,
|
||
session=self.session,
|
||
post_process_mask=True,
|
||
alpha_matting=True,
|
||
alpha_matting_foreground_threshold=200,
|
||
alpha_matting_background_threshold=20,
|
||
alpha_matting_erode_size=8
|
||
)
|
||
logger.info(f"rembg分割完成，输出形状: {output.shape}, 模型: {self.model_name}")
|
||
|
||
# 如果需要返回mask，计算mask
|
||
mask = None
|
||
if return_mask:
|
||
# 从alpha通道提取mask
|
||
if output.shape[2] == 4:
|
||
mask = output[:, :, 3]
|
||
# 优化mask：形态学操作去除噪点
|
||
mask = self.refine_mask(mask)
|
||
else:
|
||
# 如果没有alpha通道，转换为灰度图作为mask
|
||
gray = cv2.cvtColor(output, cv2.COLOR_RGB2GRAY)
|
||
# 使用更低的阈值，确保捕获更多细节
|
||
_, mask = cv2.threshold(gray, 1, 255, cv2.THRESH_BINARY)
|
||
mask = self.refine_mask(mask)
|
||
|
||
# 转换回BGR格式
|
||
if output.shape[2] == 4:
|
||
bgr_output = cv2.cvtColor(output[:, :, :3], cv2.COLOR_RGB2BGR)
|
||
# 合并alpha通道
|
||
alpha = output[:, :, 3:4]
|
||
bgr_output = np.dstack([bgr_output, alpha])
|
||
else:
|
||
bgr_output = cv2.cvtColor(output, cv2.COLOR_RGB2BGR)
|
||
|
||
return bgr_output, mask
|
||
|
||
|
||
class MODNetSegmenter:
|
||
"""基于MODNet的专业人像分割器"""
|
||
|
||
def __init__(self, model_path: Optional[str] = None):
|
||
self.model_path = model_path or "models/modnet_photographic_portrait_matting.ckpt"
|
||
self.model = None
|
||
self.device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
|
||
self._load_model()
|
||
|
||
def _load_model(self):
|
||
"""加载MODNet模型"""
|
||
try:
|
||
logger.info("加载MODNet人像分割模型")
|
||
|
||
# 这里需要预训练的MODNet模型
|
||
# 由于模型较大，这里提供接口，实际使用时需要下载模型
|
||
logger.warning("MODNet模型需要单独下载，请确保模型文件存在")
|
||
|
||
# 简化的实现，使用rembg作为后备
|
||
self.fallback_segmenter = PersonSegmenter("u2net")
|
||
|
||
except Exception as e:
|
||
logger.error(f"加载MODNet模型失败: {e}")
|
||
logger.info("使用U2Net作为后备方案")
|
||
self.fallback_segmenter = PersonSegmenter("u2net")
|
||
|
||
def segment_person(self, image: np.ndarray) -> np.ndarray:
|
||
"""使用MODNet进行人像分割"""
|
||
# 如果MODNet可用，使用MODNet
|
||
if self.model is not None:
|
||
try:
|
||
return self._segment_with_modnet(image)
|
||
except Exception as e:
|
||
logger.warning(f"MODNet分割失败，使用后备方案: {e}")
|
||
|
||
# 使用后备方案
|
||
return self.fallback_segmenter.segment_person(image, return_mask=False)[0]
|
||
|
||
def _segment_with_modnet(self, image: np.ndarray, return_mask: bool = False) -> Tuple[np.ndarray, Optional[np.ndarray]]:
|
||
"""使用MODNet进行人像分割"""
|
||
try:
|
||
if not PYTORCH_AVAILABLE or not MODNET_AVAILABLE or self.modnet_model is None:
|
||
logger.warning("MODNet不可用，使用rembg作为后备")
|
||
if not self.use_simple_method:
|
||
return self._segment_with_rembg(image, return_mask)
|
||
else:
|
||
return self._simple_segment_person(image, return_mask)
|
||
|
||
# 转换BGR到RGB
|
||
if image.shape[2] == 3:
|
||
rgb_image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
|
||
else:
|
||
rgb_image = image
|
||
|
||
# 预处理图像
|
||
# MODNet通常需要输入尺寸为512x512
|
||
h, w = rgb_image.shape[:2]
|
||
ref_size = self.modnet_ref_size
|
||
|
||
# 计算缩放比例，保持宽高比
|
||
if max(h, w) > ref_size:
|
||
scale = ref_size / max(h, w)
|
||
new_h, new_w = int(h * scale), int(w * scale)
|
||
else:
|
||
new_h, new_w = h, w
|
||
|
||
# 调整大小（必须是32的倍数，MODNet的要求）
|
||
new_h = (new_h // 32) * 32
|
||
new_w = (new_w // 32) * 32
|
||
if new_h < 32:
|
||
new_h = 32
|
||
if new_w < 32:
|
||
new_w = 32
|
||
|
||
rgb_resized = cv2.resize(rgb_image, (new_w, new_h), interpolation=cv2.INTER_LINEAR)
|
||
|
||
# 转换为PIL Image并归一化
|
||
from PIL import Image
|
||
pil_image = Image.fromarray(rgb_resized)
|
||
|
||
# MODNet的预处理（根据官方实现）
|
||
transform = transforms.Compose([
|
||
transforms.ToTensor(),
|
||
transforms.Normalize(mean=[0.5, 0.5, 0.5], std=[0.5, 0.5, 0.5])
|
||
])
|
||
|
||
input_tensor = transform(pil_image).unsqueeze(0).to(self.modnet_device)
|
||
|
||
# 推理
|
||
with torch.no_grad():
|
||
# MODNet的前向传播返回 (pred_semantic, pred_detail, pred_matte)
|
||
# 我们只需要 pred_matte（alpha matte）
|
||
_, _, pred_matte = self.modnet_model(input_tensor, inference=True)
|
||
|
||
# 处理输出
|
||
alpha = pred_matte.squeeze().cpu().numpy()
|
||
if len(alpha.shape) == 3:
|
||
alpha = alpha[0] # 取第一个通道
|
||
|
||
# 归一化到0-255
|
||
if alpha.max() <= 1.0:
|
||
alpha = (alpha * 255).astype(np.uint8)
|
||
else:
|
||
alpha = alpha.astype(np.uint8)
|
||
|
||
# 调整alpha大小回原始尺寸
|
||
if new_h != h or new_w != w:
|
||
alpha = cv2.resize(alpha, (w, h), interpolation=cv2.INTER_LINEAR)
|
||
|
||
# 创建RGBA图像
|
||
bgr_image = image.copy()
|
||
if bgr_image.shape[2] == 4:
|
||
bgr_image = bgr_image[:, :, :3]
|
||
|
||
# 应用alpha通道
|
||
rgba_output = np.dstack([bgr_image, alpha])
|
||
|
||
# 如果需要mask
|
||
mask = None
|
||
if return_mask:
|
||
mask = alpha.copy()
|
||
mask = self.refine_mask(mask)
|
||
|
||
logger.info(f"MODNet分割完成，输出形状: {rgba_output.shape}")
|
||
return rgba_output, mask
|
||
|
||
except Exception as e:
|
||
logger.error(f"MODNet分割失败: {e}")
|
||
import traceback
|
||
logger.error(traceback.format_exc())
|
||
# 回退到rembg
|
||
logger.info("MODNet失败，使用rembg作为后备")
|
||
if not self.use_simple_method:
|
||
return self._segment_with_rembg(image, return_mask)
|
||
else:
|
||
return self._simple_segment_person(image, return_mask)
|
||
|
||
|
||
def segment_image(image_path: str, output_path: Optional[str] = None,
|
||
model_name: str = "u2net") -> str:
|
||
"""便捷的图像分割函数
|
||
|
||
Args:
|
||
image_path: 输入图像路径
|
||
output_path: 输出路径，如果为None则自动生成
|
||
model_name: 使用的模型名称
|
||
|
||
Returns:
|
||
输出图像路径
|
||
"""
|
||
try:
|
||
# 读取图像
|
||
image = cv2.imread(image_path)
|
||
if image is None:
|
||
raise ValueError(f"无法读取图像: {image_path}")
|
||
|
||
# 创建分割器
|
||
segmenter = PersonSegmenter(model_name)
|
||
|
||
# 进行分割
|
||
segmented, _ = segmenter.segment_person(image)
|
||
|
||
# 确定输出路径
|
||
if output_path is None:
|
||
image_name = Path(image_path).stem
|
||
output_dir = ensure_dir("output")
|
||
output_path = str(output_dir / f"{image_name}_segmented.png")
|
||
|
||
# 保存结果
|
||
save_image(segmented, output_path)
|
||
|
||
logger.info(f"人像分割完成: {output_path}")
|
||
return output_path
|
||
|
||
except Exception as e:
|
||
logger.error(f"人像分割失败: {e}")
|
||
raise
|
||
|
||
|
||
def segment_person_from_video_frame(video_path: str, time_seconds: float = 1.0,
|
||
output_path: Optional[str] = None,
|
||
model_name: str = "u2net") -> str:
|
||
"""从视频帧中分割人物
|
||
|
||
Args:
|
||
video_path: 视频路径
|
||
time_seconds: 抽帧时间
|
||
output_path: 输出路径
|
||
model_name: 模型名称
|
||
|
||
Returns:
|
||
分割后的图像路径
|
||
"""
|
||
from .extractor import VideoExtractor
|
||
|
||
try:
|
||
# 抽取帧
|
||
extractor = VideoExtractor(video_path)
|
||
frame = extractor.extract_frame_at_time(time_seconds)
|
||
|
||
# 保存临时帧
|
||
temp_frame_path = f"temp_frame_{time_seconds}.jpg"
|
||
save_image(frame, temp_frame_path)
|
||
|
||
# 分割人物
|
||
result_path = segment_image(temp_frame_path, output_path, model_name)
|
||
|
||
# 清理临时文件
|
||
try:
|
||
os.remove(temp_frame_path)
|
||
except:
|
||
pass
|
||
|
||
return result_path
|
||
|
||
except Exception as e:
|
||
logger.error(f"视频帧人物分割失败: {e}")
|
||
raise
|