写出通过每隔N帧取一帧,对取到的每帧进行特征点提取,对检测的相邻2帧进行特征点匹配的方法进行的对监控视频抖动故障检测的Python程序
时间: 2024-05-01 12:21:43 浏览: 57
以下是通过每隔N帧取一帧,对取到的每帧进行特征点提取,对检测的相邻2帧进行特征点匹配的方法进行的对监控视频抖动故障检测的Python程序:
```python
import cv2
# 读取视频文件
cap = cv2.VideoCapture('video.mp4')
# 设置每隔N帧取一帧
N = 10
# 初始化变量
prev_frame = None
frame_cnt = 0
# 循环读取视频帧
while True:
ret, frame = cap.read()
# 判断是否读取到了帧
if not ret:
break
# 只对每隔N帧进行处理
if frame_cnt % N == 0:
# 将读取到的帧转为灰度图像
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
# 进行特征点提取
orb = cv2.ORB_create()
keypoints = orb.detect(gray, None)
# 绘制特征点并显示
img = cv2.drawKeypoints(gray, keypoints, None, color=(0,255,0), flags=0)
cv2.imshow('frame', img)
# 判断是否是第一帧
if prev_frame is not None:
# 对相邻2帧进行特征点匹配
bf = cv2.BFMatcher(cv2.NORM_HAMMING, crossCheck=True)
matches = bf.match(des1, des2)
# 计算匹配结果的平均距离
distances = [match.distance for match in matches]
mean_distance = sum(distances) / len(distances)
# 如果平均距离超过了阈值,则说明出现了抖动故障
if mean_distance > 50:
print('抖动故障!')
# 更新前一帧
prev_frame = gray
frame_cnt += 1
# 按下q键退出循环
if cv2.waitKey(1) & 0xFF == ord('q'):
break
# 释放视频文件并关闭所有窗口
cap.release()
cv2.destroyAllWindows()
```
上述程序通过每隔N帧取一帧,对取到的每帧进行特征点提取,对检测的相邻2帧进行特征点匹配,计算匹配结果的平均距离,如果平均距离超过了阈值,则说明出现了抖动故障。如果出现抖动故障,则可以通过该程序及时检测并解决。
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