Jump to content
  • Advertisement
Sign in to follow this  
uncutno

image to groundplane transformation

This topic is 4330 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

Hello! I have a problem, and I hope that somebody can point me in the right direction on how to solve it. I have 4 pairs of points Each point consists of a image coordinate(ic) (x,y) and a ground plane coordinate (gpc) (x,y). These points are coordinates in the real world plotted on an image. What i need is a transformation T, so that ic x T = gpc I dont know anything more about the scene then these four points, and i hope to get a nice little T, that can translate any image coordinate to ground plane coordinate. The ground plane is all flat, and some error is no problem. The camera have some perspective, so no orthogonal translation is possible. My first approach was to start with a guessed camera (position, direction, up, perspective, screen ratio). Then test it on all four points by creating the transformation (with world matrix, camera matrix and perspective matrix), and then hill-climbe (by adjusting camera properties) until the error was low enough. This is a pretty complex approach, so I was hoping for something simpler. Any idea?

Share this post


Link to post
Share on other sites
Advertisement
Sign in to follow this  

  • Advertisement
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

We are the game development community.

Whether you are an indie, hobbyist, AAA developer, or just trying to learn, GameDev.net is the place for you to learn, share, and connect with the games industry. Learn more About Us or sign up!

Sign me up!