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intel / libxcam

libXCam is a project for extended camera(not limited in camera) features and focus on image quality improvement and video analysis. There are lots features supported in image pre-processing, image post-processing and smart analysis. This library makes GPU/CPU/ISP working together to improve image quality. OpenCL is used to improve performance in different platforms.
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Calbration for 2-fisheye equirectangular stitching #698

Closed envyen closed 3 years ago

envyen commented 4 years ago

Hello team

For the dual-fisheye to equirectangular stitching, what is the recommended calibration scheme/tool used? How is the calibration parameters used in the library

Kindly share the details/steps for this

zongwave commented 4 years ago

to remap fisheye camera image into equirectangular image we use some intrinsic and extrinsic parameters: principal axis (points) radius fov rotation

envyen commented 4 years ago

Hi thanks for the details Is there any openly available tools/source to achieve this from input images ? Any pointers to estimate the parameters would be helpful

principal axis (points) radius fov rotation

zongwave commented 4 years ago

Principal axis and rotation can be acquired through OpenCV fisheye calibration tool.

Fov can be acquired from camera manufacture

Radius is in pixel unit, you can estimate the value from the fisheye image.

From: Naveen notifications@github.com Sent: Friday, June 12, 2020 12:51 PM To: intel/libxcam libxcam@noreply.github.com Cc: Zong, Wei wei.zong@intel.com; Comment comment@noreply.github.com Subject: Re: [intel/libxcam] Calbration for 2-fisheye equirectangular stitching (#698)

Hi thanks for the details Is there any openly available tools/source to achieve this from input images ? Any pointers to estimate the parameters would be helpful

principal axis (points) radius fov rotation

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envyen commented 3 years ago

Thanks Zong Wei, the information helped