用代码实现三帧差分法实现运动估计
时间: 2024-05-09 20:18:07 浏览: 53
好的,以下是使用 Python 实现三帧差分法的代码示例:
```python
import cv2
# 读入视频文件
cap = cv2.VideoCapture('video.mp4')
# 获取第一帧图像
ret, frame1 = cap.read()
gray1 = cv2.cvtColor(frame1, cv2.COLOR_BGR2GRAY)
while True:
# 获取下一帧图像
ret, frame2 = cap.read()
if not ret:
break
gray2 = cv2.cvtColor(frame2, cv2.COLOR_BGR2GRAY)
# 计算当前帧和前两帧之间的差分图像
diff1 = cv2.absdiff(gray2, gray1)
ret, thresh1 = cv2.threshold(diff1, 10, 255, cv2.THRESH_BINARY)
diff2 = cv2.absdiff(gray1, frame1)
ret, thresh2 = cv2.threshold(diff2, 10, 255, cv2.THRESH_BINARY)
# 叠加两个差分图像得到最终结果
final_diff = cv2.bitwise_and(thresh1, thresh2)
# 进行运动估计并绘制矩形框
contours, _ = cv2.findContours(final_diff, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
for contour in contours:
(x, y, w, h) = cv2.boundingRect(contour)
cv2.rectangle(frame2, (x, y), (x + w, y + h), (0, 255, 0), 2)
# 显示结果
cv2.imshow('Video', frame2)
# 更新帧和灰度图像
gray1 = gray2.copy()
frame1 = frame2.copy()
# 按下 q 键退出程序
if cv2.waitKey(1) & 0xFF == ord('q'):
break
cap.release()
cv2.destroyAllWindows()
```
希望这段代码可以帮助你实现三帧差分法的运动估计!
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