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opencv_webcam
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v2 update

This commit is contained in:
13339479676 2022-01-02 14:38:46 +08:00
parent d1f3b1babb
commit b00e6fe55d
4 changed files with 121 additions and 47 deletions
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5
.gitignore vendored
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@ -4,4 +4,7 @@
*.mp4
*.avi
.ipynb_checkpoints
tutorial02.ipynb
tutorial02.ipynb
help_test.py

37
README.md
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@ -171,3 +171,40 @@ python opencv_webcam.py -ishsf -isrf -rrf 0.5
python opencv_webcam.py -fsd custom_dir -isasf # 以自动版为例
```
#### 指令查询
```shell
python opencv_webcam_v02.py --help
```
```shell
usage: opencv_webcam_v02.py [-h] [--device DEVICE] [--quit QUIT] [--is_autoSaveFrame] [--is_headSaveFrame] [--is_resizeFrame] [--frame_saveDir FRAME_SAVEDIR] [--frame_nSave FRAME_NSAVE]
[--frame_capKey FRAME_CAPKEY] [--resize_frame RESIZE_FRAME [RESIZE_FRAME ...]] [--resizeRatio_frame RESIZERATIO_FRAME]
OpenCV Webcam Script
optional arguments:
-h, --help show this help message and exit
--device DEVICE, -dev DEVICE
device index for webcam
--quit QUIT, -q QUIT quit key for webcam
--is_autoSaveFrame, -isasf
is auto save frame
--is_headSaveFrame, -ishsf
is head save frame
--is_resizeFrame, -isrf
is resize frame
--frame_saveDir FRAME_SAVEDIR, -fsd FRAME_SAVEDIR
save frame dir
--frame_nSave FRAME_NSAVE, -fns FRAME_NSAVE
n frames save a frame (auto save frame)
--frame_capKey FRAME_CAPKEY, -fck FRAME_CAPKEY
frame capture key (head save frame)
--resize_frame RESIZE_FRAME [RESIZE_FRAME ...], -rf RESIZE_FRAME [RESIZE_FRAME ...]
resize frame save
--resizeRatio_frame RESIZERATIO_FRAME, -rrf RESIZERATIO_FRAME
resize ratio frame save
```

118
opencv_webcam_v02.py
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@ -11,23 +11,35 @@ import glob
import re
import os
def parse_args(argv=None):
parser = argparse.ArgumentParser(description = 'OpenCV Webcam Script')
parser.add_argument('--device','-dev', default = 0, type = int, help = 'device index for webcam')
parser.add_argument('--quit','-q', default = "q", type = str, help = 'quit key for webcam')
parser.add_argument('--is_autoSaveFrame', '-isasf', action='store_true', help = 'is auto save frame')
parser.add_argument('--is_headSaveFrame', '-ishsf', action='store_true', help = 'is head save frame')
parser.add_argument('--is_resizeFrame', '-isrf', action='store_true', help = 'is resize frame')
parser.add_argument('--frame_saveDir', '-fsd', default = "./WebcamFrame", type = str, help = 'save frame dir')
parser.add_argument('--frame_nSave', '-fns', default = 1, type = int, help = 'n frames save a frame (auto save frame)')
parser.add_argument('--frame_capKey', '-fck', default = "a", type = str, help = 'frame capture key (head save frame)')
parser.add_argument('--resize_frame', '-rf', default = [640, 480], type = int, nargs = '+', help = 'resize frame save')
parser.add_argument('--resizeRatio_frame', '-rrf', default = 1.0, type = float, help = 'resize ratio frame save')
global args
args = parser.parse_args(argv)
def parse_args(known=False):
parser = argparse.ArgumentParser(description='OpenCV Webcam Script')
parser.add_argument('--device', '-dev', default=0,
type=int, help='device index for webcam')
parser.add_argument('--quit', '-q', default="q",
type=str, help='quit key for webcam')
parser.add_argument('--is_autoSaveFrame', '-isasf',
action='store_true', help='is auto save frame')
parser.add_argument('--is_headSaveFrame', '-ishsf',
action='store_true', help='is head save frame')
parser.add_argument('--is_resizeFrame', '-isrf',
action='store_true', help='is resize frame')
parser.add_argument('--frame_saveDir', '-fsd',
default="./WebcamFrame", type=str, help='save frame dir')
parser.add_argument('--frame_nSave', '-fns', default=1,
type=int, help='n frames save a frame (auto save frame)')
parser.add_argument('--frame_capKey', '-fck', default="a",
type=str, help='frame capture key (head save frame)')
parser.add_argument('--resize_frame', '-rf',
default=[640, 480], type=int, nargs='+', help='resize frame save')
parser.add_argument('--resizeRatio_frame', '-rrf',
default=1.0, type=float, help='resize ratio frame save')
# 保存路径管理
args = parser.parse_known_args()[0] if known else parser.parse_args()
return args
# 保存路径管理
def increment_path(path, exist_ok=False, sep='', mkdir=False):
# 引用：https://github.com/ultralytics/yolov5/blob/master/utils/general.py
path = Path(path) # os-agnostic
@ -47,47 +59,58 @@ def increment_path(path, exist_ok=False, sep='', mkdir=False):
# webcam opencv
def webcam_opencv(device_index, quit_key, is_autoSaveFrame, frame_saveDir, frame_nSave, is_headSaveFrame, frame_capKey, is_resizeFrame, resize_frame, resizeRatio_frame):
cap = cv2.VideoCapture(device_index) # 连接设备
frame_width = cap.get(3) # 宽度
frame_height = cap.get(4) # 高度
fps = cap.get(5) # 帧率
s_time = time.time() # 起始时间
cap = cv2.VideoCapture(device_index) # 连接设备
frame_width = cap.get(3) # 宽度
frame_height = cap.get(4) # 高度
fps = cap.get(5) # 帧率
print(f'宽度：{frame_width}, 高度：{frame_height}， FPS：{fps}')
success, _ = cap.read() # 读取设备
success, _ = cap.read() # 读取设备
if success:
print(f'摄像头连接成功！')
if is_autoSaveFrame or is_headSaveFrame:
# 帧保存路径管理
frame_samePath = increment_path(Path(f"{frame_saveDir}") / "frames", exist_ok=False) # 增量运行
frame_samePath = increment_path(
Path(f"{frame_saveDir}") / "frames", exist_ok=False) # 增量运行
frame_samePath.mkdir(parents=True, exist_ok=True) # 创建目录
frame_num = 0 # 帧数
frame_num = 0 # 帧数
while(1):
ret, frame = cap.read() # 捕获画面
ret, frame = cap.read() # 捕获画面
frame_num += 1
print(f'第{frame_num}帧')
cv2.imshow("capture", frame) # 显示画面
cv2.imshow("capture", frame) # 显示画面
# print(frame.shape) # h,w,c
if (is_autoSaveFrame): # 自动保存
if (frame_num % frame_nSave == 0): # 每隔n帧保存一次
if (is_resizeFrame): # resize frame
w_resize = int(resize_frame[0] * resizeRatio_frame) # 重塑宽度
h_resize = int(resize_frame[1] * resizeRatio_frame) # 重塑高度
frame_new = cv2.resize(frame, (w_resize, h_resize), interpolation = cv2.INTER_AREA) # 重塑
cv2.imwrite(f'./{frame_samePath}/{frame_num}.jpg', frame_new)
if (is_autoSaveFrame): # 自动保存
if (frame_num % frame_nSave == 0): # 每隔n帧保存一次
if (is_resizeFrame): # resize frame
w_resize = int(
resize_frame[0] * resizeRatio_frame) # 重塑宽度
h_resize = int(
resize_frame[1] * resizeRatio_frame) # 重塑高度
frame_new = cv2.resize(
frame, (w_resize, h_resize), interpolation=cv2.INTER_AREA) # 重塑
cv2.imwrite(
f'./{frame_samePath}/{frame_num}.jpg', frame_new)
else:
cv2.imwrite(f'./{frame_samePath}/{frame_num}.jpg', frame)
if (is_headSaveFrame): # 手动保存
if cv2.waitKey(20) & 0xFF == ord(frame_capKey): # 保存键
if (is_resizeFrame): # 重塑
cv2.imwrite(
f'./{frame_samePath}/{frame_num}.jpg', frame)
if (is_headSaveFrame): # 手动保存
if cv2.waitKey(20) & 0xFF == ord(frame_capKey): # 保存键
if (is_resizeFrame): # 重塑
w_resize = int(resize_frame[0] * resizeRatio_frame)
h_resize = int(resize_frame[1] * resizeRatio_frame)
frame_new = cv2.resize(frame, (w_resize, h_resize), interpolation = cv2.INTER_AREA)
cv2.imwrite(f'./{frame_samePath}/{frame_num}.jpg', frame_new)
frame_new = cv2.resize(
frame, (w_resize, h_resize), interpolation=cv2.INTER_AREA)
cv2.imwrite(
f'./{frame_samePath}/{frame_num}.jpg', frame_new)
else:
cv2.imwrite(f'./{frame_samePath}/{frame_num}.jpg', frame)
if cv2.waitKey(20) & 0xFF == ord(quit_key): # 退出 ord：字符转ASCII码
cv2.imwrite(
f'./{frame_samePath}/{frame_num}.jpg', frame)
if cv2.waitKey(20) & 0xFF == ord(quit_key): # 退出 ord：字符转ASCII码
break
print(f'一共处理了{frame_num}帧')
# 释放缓存
@ -96,11 +119,12 @@ def webcam_opencv(device_index, quit_key, is_autoSaveFrame, frame_saveDir, frame
else:
print(f'摄像头连接异常！')
print(f'程序结束！')
e_time = time.time() # 终止时间
print(f'用时：{round((e_time - s_time), 3)}秒, {round((e_time - s_time)/60, 3)}分, {round((e_time - s_time)/3600, 3)}小时')
if __name__ == '__main__':
# 参数
parse_args()
def main(args):
device_index = args.device
quit_key = args.quit
is_autoSaveFrame = args.is_autoSaveFrame
@ -117,6 +141,10 @@ if __name__ == '__main__':
print(f'快捷键冲突!')
else:
# 调用webcam opencv
webcam_opencv(device_index, quit_key, is_autoSaveFrame, frame_saveDir, frame_nSave, is_headSaveFrame, frame_capKey, is_resizeFrame, resize_frame, resizeRatio_frame)
webcam_opencv(device_index, quit_key, is_autoSaveFrame, frame_saveDir, frame_nSave,
is_headSaveFrame, frame_capKey, is_resizeFrame, resize_frame, resizeRatio_frame)
print(f'程序结束！')
if __name__ == '__main__':
args = parse_args()
main(args)

8
v02.md
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@ -6,4 +6,10 @@
### 更新走势
- `2022-01-02` 创建[Jupyter版](./tutorial.ipynb)
- `2022-01-02` 创建[Jupyter版](./tutorial.ipynb)
### 功能更新
- 增加压缩质量
- 视频帧重用名