122 lines
5.6 KiB
Python
122 lines
5.6 KiB
Python
# OpenCV Webcam Script v0.1
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# 创建人：曾逸夫
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# 创建时间：2021-12-26
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import cv2
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from pathlib import Path
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import argparse
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import time
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import os
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import glob
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import re
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import os
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def parse_args(argv=None):
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parser = argparse.ArgumentParser(description = 'OpenCV Webcam Script')
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parser.add_argument('--device','-dev', default = 0, type = int, help = 'device index for webcam')
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parser.add_argument('--quit','-q', default = "q", type = str, help = 'quit key for webcam')
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parser.add_argument('--is_autoSaveFrame', '-isasf', action='store_true', help = 'is auto save frame')
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parser.add_argument('--is_headSaveFrame', '-ishsf', action='store_true', help = 'is head save frame')
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parser.add_argument('--is_resizeFrame', '-isrf', action='store_true', help = 'is resize frame')
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parser.add_argument('--frame_saveDir', '-fsd', default = "./WebcamFrame", type = str, help = 'save frame dir')
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parser.add_argument('--frame_nSave', '-fns', default = 1, type = int, help = 'n frames save a frame (auto save frame)')
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parser.add_argument('--frame_capKey', '-fck', default = "a", type = str, help = 'frame capture key (head save frame)')
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parser.add_argument('--resize_frame', '-rf', default = [640, 480], type = int, nargs = '+', help = 'resize frame save')
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parser.add_argument('--resizeRatio_frame', '-rrf', default = 1.0, type = float, help = 'resize ratio frame save')
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global args
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args = parser.parse_args(argv)
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# 保存路径管理
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def increment_path(path, exist_ok=False, sep='', mkdir=False):
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# 引用：https://github.com/ultralytics/yolov5/blob/master/utils/general.py
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path = Path(path) # os-agnostic
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if path.exists() and not exist_ok:
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suffix = path.suffix
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path = path.with_suffix('')
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dirs = glob.glob(f"{path}{sep}*") # similar paths
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matches = [re.search(rf"%s{sep}(\d+)" % path.stem, d) for d in dirs]
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i = [int(m.groups()[0]) for m in matches if m] # indices
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n = max(i) + 1 if i else 2 # increment number
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path = Path(f"{path}{sep}{n}{suffix}") # update path
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dir = path if path.suffix == '' else path.parent # directory
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if not dir.exists() and mkdir:
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dir.mkdir(parents=True, exist_ok=True) # make directory
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return path
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# webcam opencv
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def webcam_opencv(device_index, quit_key, is_autoSaveFrame, frame_saveDir, frame_nSave, is_headSaveFrame, frame_capKey, is_resizeFrame, resize_frame, resizeRatio_frame):
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cap = cv2.VideoCapture(device_index) # 连接设备
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frame_width = cap.get(3) # 宽度
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frame_height = cap.get(4) # 高度
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fps = cap.get(5) # 帧率
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print(f'宽度：{frame_width}, 高度：{frame_height}， FPS：{fps}')
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success, _ = cap.read() # 读取设备
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if success:
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print(f'摄像头连接成功！')
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if is_autoSaveFrame or is_headSaveFrame:
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# 帧保存路径管理
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frame_samePath = increment_path(Path(f"{frame_saveDir}") / "frames", exist_ok=False) # 增量运行
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frame_samePath.mkdir(parents=True, exist_ok=True) # 创建目录
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frame_num = 0 # 帧数
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while(1):
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ret, frame = cap.read() # 捕获画面
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frame_num += 1
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print(f'第{frame_num}帧')
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cv2.imshow("capture", frame) # 显示画面
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# print(frame.shape) # h,w,c
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if (is_autoSaveFrame): # 自动保存
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if (frame_num % frame_nSave == 0): # 每隔n帧保存一次
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if (is_resizeFrame): # resize frame
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w_resize = int(resize_frame[0] * resizeRatio_frame) # 重塑宽度
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h_resize = int(resize_frame[1] * resizeRatio_frame) # 重塑高度
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frame_new = cv2.resize(frame, (w_resize, h_resize), interpolation = cv2.INTER_AREA) # 重塑
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cv2.imwrite(f'./{frame_samePath}/{frame_num}.jpg', frame_new)
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else:
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cv2.imwrite(f'./{frame_samePath}/{frame_num}.jpg', frame)
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if (is_headSaveFrame): # 手动保存
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if cv2.waitKey(20) & 0xFF == ord(frame_capKey): # 保存键
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if (is_resizeFrame): # 重塑
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w_resize = int(resize_frame[0] * resizeRatio_frame)
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h_resize = int(resize_frame[1] * resizeRatio_frame)
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frame_new = cv2.resize(frame, (w_resize, h_resize), interpolation = cv2.INTER_AREA)
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cv2.imwrite(f'./{frame_samePath}/{frame_num}.jpg', frame_new)
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else:
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cv2.imwrite(f'./{frame_samePath}/{frame_num}.jpg', frame)
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if cv2.waitKey(20) & 0xFF == ord(quit_key): # 退出 ord：字符转ASCII码
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break
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print(f'一共处理了{frame_num}帧')
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# 释放缓存
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cap.release()
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cv2.destroyAllWindows()
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else:
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print(f'摄像头连接异常！')
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if __name__ == '__main__':
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# 参数
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parse_args()
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device_index = args.device
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quit_key = args.quit
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is_autoSaveFrame = args.is_autoSaveFrame
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is_headSaveFrame = args.is_headSaveFrame
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frame_saveDir = args.frame_saveDir
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frame_nSave = args.frame_nSave
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frame_capKey = args.frame_capKey
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resize_frame = args.resize_frame
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is_resizeFrame = args.is_resizeFrame
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resizeRatio_frame = args.resizeRatio_frame
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# 判断快捷键冲突
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if (quit_key == frame_capKey):
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print(f'快捷键冲突!')
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else:
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# 调用webcam opencv
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webcam_opencv(device_index, quit_key, is_autoSaveFrame, frame_saveDir, frame_nSave, is_headSaveFrame, frame_capKey, is_resizeFrame, resize_frame, resizeRatio_frame)
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print(f'程序结束！') |