camera extrinsics

[lks90commit]

Hi, I was able to get the intrinsic parameters for my camera, but I'm not sure how to get the extrinsic parameters from my two folders of left and right images (already undistorted).

On the OpenPose documentation there is this line:

./build/examples/calibration/calibration.bin --mode 2 --grid_square_size_mm 127.0 --grid_number_inner_corners 9x6 --omit_distortion --calibration_image_dir ~/Desktop/extrinsics/ --cam0 1 --cam1 0

I would appreciate if someone can indicate the way to properly get the extrinsic camera parameters in this situation, in which I have two folders of undistorted left and right images from a stereo camera.

[lks90commit]

I think I found the solution by placing all the images on the same extrinsics folder, but now I'm with the error "invalid vector<T> subscript" when I try to execute the calibration:

Starting OpenPose calibration toolbox... Running calibration (extrinsic parameters)...

Error: invalid vector<T> subscript

Coming from:

• C:\OpenPose\openpose\src\openpose\calibration\cameraParameterEstimation.cpp:op::estimateAndSaveExtrinsics():1212

[lks90commit]

solved, it was the camera_parameter_folder path.

[redyuan43]

I think I found the solution by placing all the images on the same extrinsics folder, but now I'm with the error "invalid vector subscript" when I try to execute the calibration:

Starting OpenPose calibration toolbox... Running calibration (extrinsic parameters)...

Error: invalid vector subscript

Coming from:

• C:\OpenPose\openpose\src\openpose\calibration\cameraParameterEstimation.cpp:op::estimateAndSaveExtrinsics():1212

I have the same problem. When I run the frist CAM: "./build/examples/openpose/openpose.bin --camera 0 --frame_undistort --camera_parameter_path "models/cameraParameters/0.xml" --num_gpu 0 --write_images /data/cam/extrinsics/ " and then run the second CAM "./build/examples/openpose/openpose.bin --camera 1 --frame_undistort --camera_parameter_path "models/cameraParameters/1.xml" --num_gpu 0 --write_images /data/cam/extrinsics/". The last camera images will be replaced by the second camera images one by one using the same index like this: "000000000000_rendered.png 000000000001_rendered.png 000000000002_rendered.png 000000000003_rendered.png"

I have try all the way that I could thought. But I haven't fixed it. Please help me and I'll very appreciate.

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