| ROS Resources: Documentation | Support | Discussion Forum | Index | Service Status | ros @ Robotics Stack Exchange |
am looking the kinect calibration and depth calculation.
(http://www.ros.org/wiki/kinect_calibration/technical)
z = b*f / d
There is "4.1 Focal lengths".
IR focal length is 580 pixels.
Could you please tell me why camera focal length is used in terms of pixels
instead of in mm or in meteres ?
It does not matter whether the focal length is given in pixels or mm, as the relationship is determined by the sensor and image sizes. Go through the following link for more details: http://www.bobatkins.com/photography/technical/measuring_focal_length.html
In general, it is a good idea to have the focal length in pixels as the image size is generally known. Knowing the full intrinsic camera matrix allows for independence from the image size as well.
Asked: 2012-08-06 17:58:37 -0500
Seen: 481 times
Last updated: Aug 07 '12
ROS Answers is licensed under Creative Commons Attribution 3.0 Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.
Sorry. I know that former question doesn't uploading. It is closed
I'd recommend editing the title to something a bit more relevant (focal length in pixels etc..)