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pre_picture.py
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pre_picture.py
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import cv2
import numpy as np
import torch
import torch.nn as nn
from PIL import Image
import math
from itertools import product as product
from math import ceil
import torchvision.models._utils as _utils
import torch.nn.functional as F
def conv_bn(inp, oup, stride=1, leaky=0.1):
return nn.Sequential(
nn.Conv2d(inp, oup, 3, stride, 1, bias=False),
nn.BatchNorm2d(oup),
nn.LeakyReLU(negative_slope=leaky, inplace=True)
)
def conv_dw(inp, oup, stride=1, leaky=0.1):
return nn.Sequential(
nn.Conv2d(inp, inp, 3, stride, 1, groups=inp, bias=False),
nn.BatchNorm2d(inp),
nn.LeakyReLU(negative_slope=leaky, inplace=True),
nn.Conv2d(inp, oup, 1, 1, 0, bias=False),
nn.BatchNorm2d(oup),
nn.LeakyReLU(negative_slope=leaky, inplace=True),
)
def conv_bn_no_relu(inp, oup, stride):
return nn.Sequential(
nn.Conv2d(inp, oup, 3, stride, 1, bias=False),
nn.BatchNorm2d(oup),
)
def conv_bn1X1(inp, oup, stride, leaky=0):
return nn.Sequential(
nn.Conv2d(inp, oup, 1, stride, padding=0, bias=False),
nn.BatchNorm2d(oup),
nn.LeakyReLU(negative_slope=leaky, inplace=True)
)
class MobileNetV1(nn.Module):
def __init__(self):
super(MobileNetV1, self).__init__()
self.stage1 = nn.Sequential(
# 640,640,3 -> 320,320,8
conv_bn(3, 8, 2, leaky=0.1), # 3
# 320,320,8 -> 320,320,16
conv_dw(8, 16, 1), # 7
# 320,320,16 -> 160,160,32
conv_dw(16, 32, 2), # 11
conv_dw(32, 32, 1), # 19
# 160,160,32 -> 80,80,64
conv_dw(32, 64, 2), # 27
conv_dw(64, 64, 1), # 43
)
# 80,80,64 -> 40,40,128
self.stage2 = nn.Sequential(
conv_dw(64, 128, 2), # 43 + 16 = 59
conv_dw(128, 128, 1), # 59 + 32 = 91
conv_dw(128, 128, 1), # 91 + 32 = 123
conv_dw(128, 128, 1), # 123 + 32 = 155
conv_dw(128, 128, 1), # 155 + 32 = 187
conv_dw(128, 128, 1), # 187 + 32 = 219
)
# 40,40,128 -> 20,20,256
self.stage3 = nn.Sequential(
conv_dw(128, 256, 2), # 219 +3 2 = 241
conv_dw(256, 256, 1), # 241 + 64 = 301
)
self.avg = nn.AdaptiveAvgPool2d((1, 1))
self.fc = nn.Linear(256, 1000)
def forward(self, x):
x = self.stage1(x)
x = self.stage2(x)
x = self.stage3(x)
x = self.avg(x)
# x = self.model(x)
x = x.view(-1, 256)
x = self.fc(x)
return x
class SSH(nn.Module):
def __init__(self, in_channel, out_channel):
super(SSH, self).__init__()
assert out_channel % 4 == 0
leaky = 0
if (out_channel <= 64):
leaky = 0.1
self.conv3X3 = conv_bn_no_relu(in_channel, out_channel//2, stride=1)
self.conv5X5_1 = conv_bn(in_channel, out_channel//4, stride=1, leaky = leaky)
self.conv5X5_2 = conv_bn_no_relu(out_channel//4, out_channel//4, stride=1)
self.conv7X7_2 = conv_bn(out_channel//4, out_channel//4, stride=1, leaky = leaky)
self.conv7x7_3 = conv_bn_no_relu(out_channel//4, out_channel//4, stride=1)
def forward(self, inputs):
conv3X3 = self.conv3X3(inputs)
conv5X5_1 = self.conv5X5_1(inputs)
conv5X5 = self.conv5X5_2(conv5X5_1)
conv7X7_2 = self.conv7X7_2(conv5X5_1)
conv7X7 = self.conv7x7_3(conv7X7_2)
out = torch.cat([conv3X3, conv5X5, conv7X7], dim=1)
out = F.relu(out)
return out
class FPN(nn.Module):
def __init__(self,in_channels_list,out_channels):
super(FPN,self).__init__()
leaky = 0
if (out_channels <= 64):
leaky = 0.1
self.output1 = conv_bn1X1(in_channels_list[0], out_channels, stride = 1, leaky = leaky)
self.output2 = conv_bn1X1(in_channels_list[1], out_channels, stride = 1, leaky = leaky)
self.output3 = conv_bn1X1(in_channels_list[2], out_channels, stride = 1, leaky = leaky)
self.merge1 = conv_bn(out_channels, out_channels, leaky = leaky)
self.merge2 = conv_bn(out_channels, out_channels, leaky = leaky)
def forward(self, inputs):
# names = list(inputs.keys())
inputs = list(inputs.values())
output1 = self.output1(inputs[0])
output2 = self.output2(inputs[1])
output3 = self.output3(inputs[2])
up3 = F.interpolate(output3, size=[output2.size(2), output2.size(3)], mode="nearest")
output2 = output2 + up3
output2 = self.merge2(output2)
up2 = F.interpolate(output2, size=[output1.size(2), output1.size(3)], mode="nearest")
output1 = output1 + up2
output1 = self.merge1(output1)
out = [output1, output2, output3]
return out
class RetinaFace(nn.Module):
def __init__(self, cfg=None, pre_train=False, phase='train'):
"""
:param cfg: Network related settings.
:param phase: train or test.
"""
super(RetinaFace, self).__init__()
self.phase = phase
backbone = None
if cfg['name'] == 'mobilenet0.25':
backbone = MobileNetV1()
if pre_train:
checkpoint = torch.load("./model_data/mobilenetV1X0.25_pretrain.tar", map_location=torch.device('cpu'))
from collections import OrderedDict
new_state_dict = OrderedDict()
for k, v in checkpoint['state_dict'].items():
name = k[7:] # remove module.
new_state_dict[name] = v
# load params
backbone.load_state_dict(new_state_dict)
elif cfg['name'] == 'Resnet50':
backbone = models.resnet50(pretrained=pre_train)
self.body = _utils.IntermediateLayerGetter(backbone, cfg['return_layers'])
in_channels_stage2 = cfg['in_channel']
in_channels_list = [
in_channels_stage2 * 2,
in_channels_stage2 * 4,
in_channels_stage2 * 8,
]
out_channels = cfg['out_channel']
self.fpn = FPN(in_channels_list, out_channels)
self.ssh1 = SSH(out_channels, out_channels)
self.ssh2 = SSH(out_channels, out_channels)
self.ssh3 = SSH(out_channels, out_channels)
self.ClassHead = self._make_class_head(fpn_num=3, inchannels=cfg['out_channel'])
self.BboxHead = self._make_bbox_head(fpn_num=3, inchannels=cfg['out_channel'])
self.LandmarkHead = self._make_landmark_head(fpn_num=3, inchannels=cfg['out_channel'])
def _make_class_head(self, fpn_num=3, inchannels=64, anchor_num=2):
classhead = nn.ModuleList()
for i in range(fpn_num):
classhead.append(ClassHead(inchannels, anchor_num))
return classhead
def _make_bbox_head(self, fpn_num=3, inchannels=64, anchor_num=2):
bboxhead = nn.ModuleList()
for i in range(fpn_num):
bboxhead.append(BboxHead(inchannels, anchor_num))
return bboxhead
def _make_landmark_head(self, fpn_num=3, inchannels=64, anchor_num=2):
landmarkhead = nn.ModuleList()
for i in range(fpn_num):
landmarkhead.append(LandmarkHead(inchannels, anchor_num))
return landmarkhead
def forward(self, inputs):
out = self.body(inputs)
# FPN
fpn = self.fpn(out)
# SSH
feature1 = self.ssh1(fpn[0])
feature2 = self.ssh2(fpn[1])
feature3 = self.ssh3(fpn[2])
features = [feature1, feature2, feature3]
bbox_regressions = torch.cat([self.BboxHead[i](feature) for i, feature in enumerate(features)], dim=1)
classifications = torch.cat([self.ClassHead[i](feature) for i, feature in enumerate(features)], dim=1)
ldm_regressions = torch.cat([self.LandmarkHead[i](feature) for i, feature in enumerate(features)], dim=1)
if self.phase == 'train':
output = (bbox_regressions, classifications, ldm_regressions)
else:
output = (bbox_regressions, F.softmax(classifications, dim=-1), ldm_regressions)
return output
class BboxHead(nn.Module):
def __init__(self,inchannels=512,num_anchors=2):
super(BboxHead,self).__init__()
self.conv1x1 = nn.Conv2d(inchannels,num_anchors*4,kernel_size=(1,1),stride=1,padding=0)
def forward(self,x):
out = self.conv1x1(x)
out = out.permute(0,2,3,1).contiguous()
return out.view(out.shape[0], -1, 4)
class LandmarkHead(nn.Module):
def __init__(self,inchannels=512,num_anchors=2):
super(LandmarkHead,self).__init__()
self.conv1x1 = nn.Conv2d(inchannels,num_anchors*10,kernel_size=(1,1),stride=1,padding=0)
def forward(self,x):
out = self.conv1x1(x)
out = out.permute(0,2,3,1).contiguous()
return out.view(out.shape[0], -1, 10)
class ClassHead(nn.Module):
def __init__(self, inchannels=512, num_anchors=2):
super(ClassHead, self).__init__()
self.num_anchors = num_anchors
self.conv1x1 = nn.Conv2d(inchannels, self.num_anchors * 2, kernel_size=(1, 1), stride=1, padding=0)
def forward(self, x):
out = self.conv1x1(x)
out = out.permute(0, 2, 3, 1).contiguous()
return out.view(out.shape[0], -1, 2)
def decode(loc, priors, variances):
# 中心解码,宽高解码
boxes = torch.cat((priors[:, :2] + loc[:, :2] * variances[0] * priors[:, 2:],
priors[:, 2:] * torch.exp(loc[:, 2:] * variances[1])), 1)
boxes[:, :2] -= boxes[:, 2:] / 2
boxes[:, 2:] += boxes[:, :2]
return boxes
def decode_landm(pre, priors, variances):
# 关键点解码
landms = torch.cat((priors[:, :2] + pre[:, :2] * variances[0] * priors[:, 2:],
priors[:, :2] + pre[:, 2:4] * variances[0] * priors[:, 2:],
priors[:, :2] + pre[:, 4:6] * variances[0] * priors[:, 2:],
priors[:, :2] + pre[:, 6:8] * variances[0] * priors[:, 2:],
priors[:, :2] + pre[:, 8:10] * variances[0] * priors[:, 2:],
), dim=1)
return landms
def non_max_suppression(boxes, conf_thres=0.5, nms_thres=0.3):
detection = boxes
# 1、找出该图片中得分大于门限函数的框。在进行重合框筛选前就进行得分的筛选可以大幅度减少框的数量。
mask = detection[:,4] >= conf_thres
detection = detection[mask]
if not np.shape(detection)[0]:
return []
best_box = []
scores = detection[:,4]
# 2、根据得分对框进行从大到小排序。
arg_sort = np.argsort(scores)[::-1]
detection = detection[arg_sort]
while np.shape(detection)[0]>0:
# 3、每次取出得分最大的框,计算其与其它所有预测框的重合程度,重合程度过大的则剔除。
best_box.append(detection[0])
if len(detection) == 1:
break
ious = iou(best_box[-1],detection[1:])
detection = detection[1:][ious<nms_thres]
return np.array(best_box)
def iou(b1, b2):
b1_x1, b1_y1, b1_x2, b1_y2 = b1[0], b1[1], b1[2], b1[3]
b2_x1, b2_y1, b2_x2, b2_y2 = b2[:, 0], b2[:, 1], b2[:, 2], b2[:, 3]
inter_rect_x1 = np.maximum(b1_x1, b2_x1)
inter_rect_y1 = np.maximum(b1_y1, b2_y1)
inter_rect_x2 = np.minimum(b1_x2, b2_x2)
inter_rect_y2 = np.minimum(b1_y2, b2_y2)
inter_area = np.maximum(inter_rect_x2 - inter_rect_x1, 0) * \
np.maximum(inter_rect_y2 - inter_rect_y1, 0)
area_b1 = (b1_x2 - b1_x1) * (b1_y2 - b1_y1)
area_b2 = (b2_x2 - b2_x1) * (b2_y2 - b2_y1)
iou = inter_area / np.maximum((area_b1 + area_b2 - inter_area), 1e-6)
return iou
def Alignment_1(img, landmark):
if landmark.shape[0] == 68:
x = landmark[36, 0] - landmark[45, 0]
y = landmark[36, 1] - landmark[45, 1]
elif landmark.shape[0] == 5:
x = landmark[0, 0] - landmark[1, 0]
y = landmark[0, 1] - landmark[1, 1]
# 眼睛连线相对于水平线的倾斜角
if x == 0:
angle = 0
else:
# 计算它的弧度制
angle = math.atan(y / x) * 180 / math.pi
center = (img.shape[1] // 2, img.shape[0] // 2)
RotationMatrix = cv2.getRotationMatrix2D(center, angle, 1)
# 仿射函数
new_img = cv2.warpAffine(img, RotationMatrix, (img.shape[1], img.shape[0]))
RotationMatrix = np.array(RotationMatrix)
new_landmark = []
for i in range(landmark.shape[0]):
pts = []
pts.append(RotationMatrix[0, 0] * landmark[i, 0] + RotationMatrix[0, 1] * landmark[i, 1] + RotationMatrix[0, 2])
pts.append(RotationMatrix[1, 0] * landmark[i, 0] + RotationMatrix[1, 1] * landmark[i, 1] + RotationMatrix[1, 2])
new_landmark.append(pts)
new_landmark = np.array(new_landmark)
return new_img, new_landmark
def letterbox_image(image, size):
ih, iw, _ = np.shape(image)
w, h = size
scale = min(w/iw, h/ih)
nw = int(iw*scale)
nh = int(ih*scale)
image = cv2.resize(image, (nw,nh), Image.BICUBIC)
new_image = np.ones([size[1],size[0],3])*128
new_image[(h-nh)//2:nh+(h-nh)//2, (w-nw)//2:nw+(w-nw)//2] = image
return new_image
def retinaface_correct_boxes(result, input_shape, image_shape):
# 它的作用是将归一化后的框坐标转换成原图的大小
scale_for_offset_for_boxs = np.array([image_shape[1], image_shape[0], image_shape[1], image_shape[0]])
scale_for_landmarks_offset_for_landmarks = np.array([image_shape[1], image_shape[0], image_shape[1], image_shape[0],
image_shape[1], image_shape[0], image_shape[1], image_shape[0],
image_shape[1], image_shape[0]])
new_shape = image_shape * np.min(input_shape / image_shape)
offset = (input_shape - new_shape) / 2. / input_shape
scale = input_shape / new_shape
scale_for_boxs = [scale[1], scale[0], scale[1], scale[0]]
scale_for_landmarks = [scale[1], scale[0], scale[1], scale[0], scale[1], scale[0], scale[1], scale[0], scale[1],
scale[0]]
offset_for_boxs = np.array([offset[1], offset[0], offset[1], offset[0]]) * scale_for_offset_for_boxs
offset_for_landmarks = np.array(
[offset[1], offset[0], offset[1], offset[0], offset[1], offset[0], offset[1], offset[0], offset[1],
offset[0]]) * scale_for_landmarks_offset_for_landmarks
result[:, :4] = (result[:, :4] - np.array(offset_for_boxs)) * np.array(scale_for_boxs)
result[:, 5:] = (result[:, 5:] - np.array(offset_for_landmarks)) * np.array(scale_for_landmarks)
return result
cfg_mnet = {
'name': 'mobilenet0.25',
'min_sizes': [[16, 32], [64, 128], [256, 512]],
'steps': [8, 16, 32],
'variance': [0.1, 0.2],
'clip': False,
'loc_weight': 2.0,
#------------------------------------------------------------------#
# 视频上看到的训练图片大小为640,为了提高大图状态下的困难样本
# 的识别能力,我将训练图片进行调大
#------------------------------------------------------------------#
'train_image_size': 840,
'return_layers': {'stage1': 1, 'stage2': 2, 'stage3': 3},
'in_channel': 32,
'out_channel': 64
}
class Anchors(object):
def __init__(self, cfg, image_size=None, phase='train'):
super(Anchors, self).__init__()
self.min_sizes = cfg['min_sizes']
self.steps = cfg['steps']
self.clip = cfg['clip']
self.image_size = image_size
self.feature_maps = [[ceil(self.image_size[0]/step), ceil(self.image_size[1]/step)] for step in self.steps]
def get_anchors(self):
anchors = []
for k, f in enumerate(self.feature_maps):
min_sizes = self.min_sizes[k]
# 每个网格点2个先验框,都是正方形
for i, j in product(range(f[0]), range(f[1])):
for min_size in min_sizes:
s_kx = min_size / self.image_size[1]
s_ky = min_size / self.image_size[0]
dense_cx = [x * self.steps[k] / self.image_size[1] for x in [j + 0.5]]
dense_cy = [y * self.steps[k] / self.image_size[0] for y in [i + 0.5]]
for cy, cx in product(dense_cy, dense_cx):
anchors += [cx, cy, s_kx, s_ky]
output = torch.Tensor(anchors).view(-1, 4)
if self.clip:
output.clamp_(max=1, min=0)
return output
def preprocess_input(image):
image -= np.array((104, 117, 123), np.float32)
return image
class Retinaface(object):
_defaults = {
"retinaface_model_path": 'model_data/Retinaface_mobilenet0.25.pth',
# -----------------------------------#
# 可选retinaface_backbone有
# mobilenet和resnet50
# -----------------------------------#
"retinaface_backbone": "mobilenet",
"confidence": 0.5,
"iou": 0.3,
# ----------------------------------------------------------------------#
# 是否需要进行图像大小限制。
# 输入图像大小会大幅度地影响FPS,想加快检测速度可以减少input_shape。
# 开启后,会将输入图像的大小限制为input_shape。否则使用原图进行预测。
# 会导致检测结果偏差,主干为resnet50不存在此问题。
# 可根据输入图像的大小自行调整input_shape,注意为32的倍数,如[640, 640, 3]
# ----------------------------------------------------------------------#
"retinaface_input_shape": [640, 640, 3],
# -----------------------------------#
# 是否需要进行图像大小限制
# -----------------------------------#
"letterbox_image": True,
"cuda": False
}
@classmethod
def get_defaults(cls, n):
if n in cls._defaults:
return cls._defaults[n]
else:
return "Unrecognized attribute name '" + n + "'"
def __init__(self, encoding=0, **kwargs):
self.__dict__.update(self._defaults)
if self.retinaface_backbone == "mobilenet":
self.cfg = cfg_mnet
self.generate()
self.anchors = Anchors(self.cfg, image_size=(
self.retinaface_input_shape[0], self.retinaface_input_shape[1])).get_anchors()
# ---------------------------------------------------#
# 检测图片
# ---------------------------------------------------#
def detect_image(self, image):
# 绘制人脸框
image=image.convert("RGB")
image = np.array(image, np.float32)
old_image = np.array(image.copy(), np.uint8)
# ---------------------------------------------------#
# Retinaface检测部分-开始
# ---------------------------------------------------#
im_height, im_width, _ = np.shape(image)
# 它的作用是将归一化后的框坐标转换成原图的大小
scale = torch.Tensor([np.shape(image)[1], np.shape(image)[0], np.shape(image)[1], np.shape(image)[0]])
scale_for_landmarks = torch.Tensor(
[np.shape(image)[1], np.shape(image)[0], np.shape(image)[1], np.shape(image)[0],
np.shape(image)[1], np.shape(image)[0], np.shape(image)[1], np.shape(image)[0],
np.shape(image)[1], np.shape(image)[0]])
if self.letterbox_image:
image = letterbox_image(image, [self.retinaface_input_shape[1], self.retinaface_input_shape[0]])
anchors = self.anchors
else:
anchors = Anchors(self.cfg, image_size=(im_height, im_width)).get_anchors()
# ---------------------------------------------------#
# 图片预处理,归一化
# ---------------------------------------------------#
image = preprocess_input(image).transpose(2, 0, 1)
image = torch.from_numpy(image).unsqueeze(0).type(torch.FloatTensor)
if self.cuda:
scale = scale.cuda()
scale_for_landmarks = scale_for_landmarks.cuda()
image = image.cuda()
anchors = anchors.cuda()
else:
pass
# ---------------------------------------------------#
# 将处理完的图片传入Retinaface网络当中进行预测
# ---------------------------------------------------#
with torch.no_grad():
loc, conf, landms = self.net(image) # forward pass
# ---------------------------------------------------#
# Retinaface网络的解码,最终我们会获得预测框
# 将预测结果进行解码和非极大抑制
# ---------------------------------------------------#
boxes = decode(loc.data.squeeze(0), anchors, self.cfg['variance'])
boxes = boxes * scale
boxes = boxes.cpu().numpy()
conf = conf.data.squeeze(0)[:, 1:2].cpu().numpy()
landms = decode_landm(landms.data.squeeze(0), anchors, self.cfg['variance'])
landms = landms * scale_for_landmarks
landms = landms.cpu().numpy()
boxes_conf_landms = np.concatenate([boxes, conf, landms], -1)
boxes_conf_landms = non_max_suppression(boxes_conf_landms, self.confidence)
if len(boxes_conf_landms) <= 0:
return old_image
boxes_conf_landms = np.array(boxes_conf_landms)
if self.letterbox_image:
boxes_conf_landms = retinaface_correct_boxes(boxes_conf_landms, np.array(
(self.retinaface_input_shape[0], self.retinaface_input_shape[1])), np.array([im_height, im_width]))
for boxes_conf_landm in boxes_conf_landms:
# ----------------------#
# 图像截取,人脸矫正
# ----------------------#
boxes_conf_landm = np.maximum(boxes_conf_landm, 0)
crop_img = np.array(old_image)[int(boxes_conf_landm[1]):int(boxes_conf_landm[3]),
int(boxes_conf_landm[0]):int(boxes_conf_landm[2])]
landmark = np.reshape(boxes_conf_landm[5:], (5, 2)) - np.array(
[int(boxes_conf_landm[0]), int(boxes_conf_landm[1])])
crop_img, _ = Alignment_1(crop_img, landmark)
# print(crop_img.shape)
# test_img=cv2.cvtColor(crop_img,cv2.COLOR_BGR2RGB)
# print(test_img.shape)
# cv2.imshow('1',test_img)
# cv2.waitKey(0)
return crop_img
return old_image
def generate(self):
self.net = RetinaFace(cfg=self.cfg, phase='eval', pre_train=False).eval()
state_dict = torch.load(self.retinaface_model_path, map_location='cpu')
self.net.load_state_dict(state_dict)
if self.cuda:
self.net = nn.DataParallel(self.net)
self.net = self.net.cuda()
else:
self.net = nn.DataParallel(self.net)
#
# retinaface = Retinaface()
# image = Image.open('../img/1_001.jpg')
# print(np.array(image).shape)
# cv2.imshow('0',np.array(image))
# cv2.waitKey(0)
#image = cv2.cvtColor(image,cv2.COLOR_BGR2RGB)
# test_image=retinaface.detect_image(image)
# cv2.imshow('1',test_image)
# cv2.waitKey(0)
# print(test_image.shape)