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Hi guys I need some help,

I did a stitching code for 4 GoPro camera input, but I need more accurate camera calibration result especially the camera pose. So I found there is a Multi-camera Calibration class in contrib modules, and trying to use it. However, I did it 3 times for same camera rig to capture different test data (about 200 images each), then totally got different result, extrinsic matrix is way different each test.

What I'm actually trying to do is the following:

• To generate a random pattern (resolution 1280x960), print it out in A3 size
• Capture test images about 200 (resolution 1920x1080)
• Run Multi-camera Calibration (I use pinhole model)
• Reprojection error comes out about 1~4

There's my reference: http://docs.opencv.org/master/d2/d1c/tutorial_multi_camera_main.html

Does anyone have an idea of how to achieve accurate multiple camera calibrations or any trick to use this modules? Each camera has 2 small overlap region on left and right side. Thank you!

Hi guys I need some help,

I did a stitching code for 4 GoPro camera input, but I need more accurate camera calibration result especially the camera pose. So I found there is a Multi-camera Calibration class in contrib modules, and trying to use it. However, I did it 3 times for same camera rig to capture different test data (about 200 images each), then totally got different result, extrinsic matrix is way different each test.

What I'm actually trying to do is the following:

• To generate a random pattern (resolution 1280x960), print it out in A3 size
• Capture test images about 200 (resolution 1920x1080)
• Run Multi-camera Calibration (I use pinhole model)
• Reprojection error comes out about 1~4

There's my reference: http://docs.opencv.org/master/d2/d1c/tutorial_multi_camera_main.html

Does anyone have an idea of how to achieve accurate multiple camera calibrations or any trick to use this modules? Each camera has 2 small overlap region on left and right side. Thank you!