双目标定 #3

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logzhan merged 1 commits from :main into main 2024-01-09 17:01:45 +08:00
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import numpy as np
import cv2
cap = cv2.VideoCapture(0)
i = 0
cap.set(cv2.CAP_PROP_FRAME_WIDTH, 1280)
# # cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 680)
while(cap.isOpened()):
ret, frame = cap.read()
# height, width, channels = frame.shape
# print(f"Image size: {width} x {height}")
if ret==True:
left = frame[:,0:640]
right = frame[:,640:1280]
#cv2.nameswindow(0)
cv2.imshow('frame', frame)
if cv2.waitKey(10) == ord('q'):
cv2.imwrite("D:\code\python\l\l_" + str(i) + ".jpg",left)
cv2.imwrite("D:\code\python\s\s_" + str(i) + ".jpg",right)
i = i +1
else:
break

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# 双目标定
使用matlab对双目图像进行标定
1. 拍摄双目图像然后将左右目图像进行分割。拍摄和分割均在`catpture_photo.py`完成。完成后图片自动保存在文件夹中。
2. 打开matlab
![Untitled](./image/Untitled.png)
点击New Session后Add Images分别添加左右目图像。
点击Calibrate进行标定
1. 标定完成后Export Camera Parameters
2. 获得标定结果
![Untitled](./image/Untitled 1.png)
```cpp
new_stereo:
Mat cam_matrix_left = (Mat_<double>(3, 3) <<
4.869084743604942e+02, 0, 0,
0,4.859921620798602e+02, 0,
2.813183643903652e+02, 2.267657091677993e+02, 1);
Mat cam_matrix_right = (Mat_<double>(3, 3) <<
4.859133331805883e+02, 0, 0,
0,4.850356748771951e+02, 0,
2.970046483040089e+02, 2.324763397214774e+02, 1);
Mat distortion_l = (Mat_<double>(1, 5) <<0.121235284781974,-0.161097849662596, 0,
0, 0);
Mat distortion_r = (Mat_<double>(1, 5) <<0.105479235005840,-0.120347246815955, 0,
0, 0);
Mat rotate = (Mat_<double>(3, 3) <<
0.999921984818601, 3.753847738839353e-04, -0.012485325894835,
-4.085449515452996e-04, 0.999996396040715, -0.002653487630467,
0.012484284819374, 0.002658381435011,0.999918534502034);
Mat trans = (Mat_<double>(3, 1) <<
-60.319997608188590, -0.019664800882533, -0.638993708428792);
```
old stereo
```jsx
Mat cam_matrix_left = (Mat_<double>(3, 3) <<
4.809895643547006e+02, 0, 0,
0,4.807599168204821e+02, 0,
3.362108165786334e+02, 2.298502481932070e+02, 1);
Mat cam_matrix_right = (Mat_<double>(3, 3) <<
4.903260126250775e+02, 0, 0,
0,4.900310486342847e+02, 0,
3.230124997386542e+02, 2.346297967642670e+02, 1);
Mat distortion_l = (Mat_<double>(1, 5) <<0.113688825569154,-0.106166584327678, 0,
0, 0);
Mat distortion_r = (Mat_<double>(1, 5) <<0.121425307936153,-0.141892782717707, 0,
0, 0);
Mat rotate = (Mat_<double>(3, 3) <<
0.999996295879846, 8.723884080433472e-04, 0.002578209660240,
-8.682590894537506e-04,0.999998339366207, -0.001602308016931,
-0.002579603213718,0.001600063527818,0.999995392711370);
Mat trans = (Mat_<double>(3, 1) <<
-60.348359844102470,-0.030699794141365, 0.495248628081046);
```
注意拍摄和分割程序在windows下完成在linux下拍摄标定结果精度不高。