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video_infer.py
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# coding: utf8
# Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserve.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import argparse
import os
import os.path as osp
import cv2
import numpy as np
from utils.humanseg_postprocess import postprocess, threshold_mask
import models
import transforms
def parse_args():
parser = argparse.ArgumentParser(description='HumanSeg inference for video')
parser.add_argument(
'--model_dir',
dest='model_dir',
help='Model path for inference',
type=str)
parser.add_argument(
'--video_path',
dest='video_path',
help=
'Video path for inference, camera will be used if the path not existing',
type=str,
default=None)
parser.add_argument(
'--save_dir',
dest='save_dir',
help='The directory for saving the inference results',
type=str,
default='./output')
parser.add_argument(
"--image_shape",
dest="image_shape",
help="The image shape for net inputs.",
nargs=2,
default=[192, 192],
type=int)
return parser.parse_args()
def predict(img, model, test_transforms):
model.arrange_transform(transforms=test_transforms, mode='test')
img, im_info = test_transforms(img)
img = np.expand_dims(img, axis=0)
result = model.exe.run(
model.test_prog,
feed={'image': img},
fetch_list=list(model.test_outputs.values()))
score_map = result[1]
score_map = np.squeeze(score_map, axis=0)
score_map = np.transpose(score_map, (1, 2, 0))
return score_map, im_info
def recover(img, im_info):
keys = list(im_info.keys())
for k in keys[::-1]:
if k == 'shape_before_resize':
h, w = im_info[k][0], im_info[k][1]
img = cv2.resize(img, (w, h), cv2.INTER_LINEAR)
elif k == 'shape_before_padding':
h, w = im_info[k][0], im_info[k][1]
img = img[0:h, 0:w]
return img
def video_infer(args):
resize_h = args.image_shape[1]
resize_w = args.image_shape[0]
test_transforms = transforms.Compose(
[transforms.Resize((resize_w, resize_h)),
transforms.Normalize()])
model = models.load_model(args.model_dir)
if not args.video_path:
cap = cv2.VideoCapture(0)
else:
cap = cv2.VideoCapture(args.video_path)
if not cap.isOpened():
raise IOError("Error opening video stream or file, "
"--video_path whether existing: {}"
" or camera whether working".format(args.video_path))
return
width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
disflow = cv2.DISOpticalFlow_create(cv2.DISOPTICAL_FLOW_PRESET_ULTRAFAST)
prev_gray = np.zeros((resize_h, resize_w), np.uint8)
prev_cfd = np.zeros((resize_h, resize_w), np.float32)
is_init = True
fps = cap.get(cv2.CAP_PROP_FPS)
if args.video_path:
print('Please wait. It is computing......')
# 用于保存预测结果视频
if not osp.exists(args.save_dir):
os.makedirs(args.save_dir)
out = cv2.VideoWriter(
osp.join(args.save_dir, 'result.avi'),
cv2.VideoWriter_fourcc('M', 'J', 'P', 'G'), fps, (width, height))
# 开始获取视频帧
while cap.isOpened():
ret, frame = cap.read()
if ret:
score_map, im_info = predict(frame, model, test_transforms)
cur_gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
cur_gray = cv2.resize(cur_gray, (resize_w, resize_h))
score_map = 255 * score_map[:, :, 1]
optflow_map = postprocess(cur_gray, score_map, prev_gray, prev_cfd, \
disflow, is_init)
prev_gray = cur_gray.copy()
prev_cfd = optflow_map.copy()
is_init = False
optflow_map = cv2.GaussianBlur(optflow_map, (3, 3), 0)
optflow_map = threshold_mask(
optflow_map, thresh_bg=0.2, thresh_fg=0.8)
img_matting = np.repeat(
optflow_map[:, :, np.newaxis], 3, axis=2)
img_matting = recover(img_matting, im_info)
bg_im = np.ones_like(img_matting) * 255
comb = (img_matting * frame + (1 - img_matting) * bg_im).astype(
np.uint8)
out.write(comb)
else:
break
cap.release()
out.release()
else:
while cap.isOpened():
ret, frame = cap.read()
if ret:
score_map, im_info = predict(frame, model, test_transforms)
cur_gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
cur_gray = cv2.resize(cur_gray, (resize_w, resize_h))
score_map = 255 * score_map[:, :, 1]
optflow_map = postprocess(cur_gray, score_map, prev_gray, prev_cfd, \
disflow, is_init)
prev_gray = cur_gray.copy()
prev_cfd = optflow_map.copy()
is_init = False
optflow_map = cv2.GaussianBlur(optflow_map, (3, 3), 0)
optflow_map = threshold_mask(
optflow_map, thresh_bg=0.2, thresh_fg=0.8)
img_matting = np.repeat(
optflow_map[:, :, np.newaxis], 3, axis=2)
img_matting = recover(img_matting, im_info)
bg_im = np.ones_like(img_matting) * 255
comb = (img_matting * frame + (1 - img_matting) * bg_im).astype(
np.uint8)
cv2.imshow('HumanSegmentation', comb)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
else:
break
cap.release()
if __name__ == "__main__":
args = parse_args()
video_infer(args)