55 lines
1.3 KiB
Python
55 lines
1.3 KiB
Python
|
import cv2
|
|||
|
|
import time
|
|||
|
|
|
|||
|
|
# 打开摄像头
|
|||
|
|
cap = cv2.VideoCapture(0, cv2.CAP_DSHOW)
|
|||
|
|
|
|||
|
|
# 设置摄像头帧率为30
|
|||
|
|
cap.set(cv2.CAP_PROP_FPS, 35)
|
|||
|
|
|
|||
|
|
# 设置摄像头图像大小为640x480
|
|||
|
|
cap.set(cv2.CAP_PROP_FRAME_WIDTH, 640)
|
|||
|
|
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 480)
|
|||
|
|
cap.set(cv2.CAP_PROP_FOURCC, cv2.VideoWriter_fourcc('M', 'J', 'P', 'G'))
|
|||
|
|
|
|||
|
|
# 检查摄像头是否成功打开
|
|||
|
|
if not cap.isOpened():
|
|||
|
|
print("Error: Could not open camera.")
|
|||
|
|
exit()
|
|||
|
|
|
|||
|
|
# 定义一个计时器
|
|||
|
|
start_time = time.time()
|
|||
|
|
frame_counter = 0
|
|||
|
|
fps = 0
|
|||
|
|
while True:
|
|||
|
|
# 读取一帧图像
|
|||
|
|
ret, frame = cap.read()
|
|||
|
|
|
|||
|
|
if not ret:
|
|||
|
|
print("Error: Could not read frame.")
|
|||
|
|
break
|
|||
|
|
|
|||
|
|
# 计算帧率
|
|||
|
|
frame_counter += 1
|
|||
|
|
elapsed_time = time.time() - start_time
|
|||
|
|
if elapsed_time > 1:
|
|||
|
|
fps = frame_counter / elapsed_time
|
|||
|
|
start_time = time.time()
|
|||
|
|
frame_counter = 0
|
|||
|
|
|
|||
|
|
# 在图像上显示帧率
|
|||
|
|
fps_text = f"FPS: {round(fps, 2)}"
|
|||
|
|
print(fps_text)
|
|||
|
|
cv2.putText(frame, fps_text, (10, 30), cv2.FONT_HERSHEY_SIMPLEX, 1, (255, 255, 255), 2)
|
|||
|
|
|
|||
|
|
# 显示图像
|
|||
|
|
cv2.imshow("Frame", frame)
|
|||
|
|
|
|||
|
|
# 检查是否按下了q键，如果是则退出循环
|
|||
|
|
if cv2.waitKey(1) & 0xFF == ord('q'):
|
|||
|
|
break
|
|||
|
|
|
|||
|
|
# 释放摄像头并关闭所有窗口
|
|||
|
|
cap.release()
|
|||
|
|
cv2.destroyAllWindows()
|