视频稳像代码,用orb实现特征点提取,暴力匹配实现特征点匹配,并剔除误匹配点,然后用仿射变换模型进行全局运动估计,得出运动参数,并用滑动平均算法进行平滑得到平均运动参数,最后用这些参数再利用仿射变换模型进行运动补偿。将视频输出并保存到指定的本地文件
时间: 2024-05-07 09:20:40 浏览: 9
以下是一个简单的视频稳像代码,使用ORB算法进行特征点提取和匹配,利用仿射变换模型进行全局运动估计和补偿,以及滑动平均算法进行平滑处理。
```python
import cv2
import numpy as np
# 设置视频输入和输出文件路径
input_file = 'input_video.mp4'
output_file = 'output_video.mp4'
# 定义ORB算法对象
orb = cv2.ORB_create()
# 定义FLANN匹配器对象
FLANN_INDEX_LSH = 6
index_params = dict(algorithm=FLANN_INDEX_LSH, table_number=6, key_size=12, multi_probe_level=1)
search_params = dict(checks=50)
flann_matcher = cv2.FlannBasedMatcher(index_params, search_params)
# 定义滑动窗口和平均参数
window_size = 10
smooth_param = 0.5
smoothed_params = []
# 读取视频并获取基本信息
cap = cv2.VideoCapture(input_file)
fps = int(cap.get(cv2.CAP_PROP_FPS))
width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
num_frames = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))
# 定义输出视频对象
fourcc = cv2.VideoWriter_fourcc(*'mp4v')
out = cv2.VideoWriter(output_file, fourcc, fps, (width, height))
# 读取第一帧并提取特征点
ret, prev_frame = cap.read()
prev_gray = cv2.cvtColor(prev_frame, cv2.COLOR_BGR2GRAY)
prev_kp, prev_des = orb.detectAndCompute(prev_gray, None)
# 循环遍历每一帧
while True:
# 读取当前帧并转化为灰度图像
ret, curr_frame = cap.read()
if not ret:
break
curr_gray = cv2.cvtColor(curr_frame, cv2.COLOR_BGR2GRAY)
# 提取当前帧的特征点
curr_kp, curr_des = orb.detectAndCompute(curr_gray, None)
# 进行特征点匹配
matches = flann_matcher.knnMatch(curr_des, prev_des, k=2)
good_matches = []
for m, n in matches:
if m.distance < 0.7 * n.distance:
good_matches.append(m)
# 剔除误匹配点
src_pts = np.float32([curr_kp[m.queryIdx].pt for m in good_matches]).reshape(-1, 1, 2)
dst_pts = np.float32([prev_kp[m.trainIdx].pt for m in good_matches]).reshape(-1, 1, 2)
M, mask = cv2.estimateAffinePartial2D(src_pts, dst_pts, method=cv2.RANSAC, ransacReprojThreshold=5.0)
mask = mask.flatten()
src_pts = src_pts[mask == 1]
dst_pts = dst_pts[mask == 1]
# 进行全局运动估计并平滑处理
M, _ = cv2.estimateAffinePartial2D(src_pts, dst_pts)
smoothed_params.append(M.flatten())
if len(smoothed_params) > window_size:
smoothed_params.pop(0)
smoothed_M = np.mean(smoothed_params, axis=0).reshape(2, 3)
# 进行运动补偿并输出到视频文件
stabilized_frame = cv2.warpAffine(curr_frame, smoothed_M, (width, height))
out.write(stabilized_frame)
# 释放资源
cap.release()
out.release()
```
这是一个简单的视频稳像代码,适用于一般的场景。对于更复杂的运动情况,可能需要更高级的算法和更精细的参数调整。