# Find plane angle from pictures

• Dec 3rd 2010, 12:59 AM
RavenAll
Find plane angle from pictures
Hi all.

I need to get some information about plane position and camera position from a pictures.
I have i plane with 3 points (red,green,blue) and then theyre coordinates inside the image.
Using circle and string i was able to get the y rotation of the plane where the points are on (the rotation of point of view)
But now i need the x rotation of the plane (the up/down angle that the camera taken the picture).
But i'm not able to find a way to get it.

This is an image of the angle i need
ImageShack&#174; - Online Photo and Video Hosting

For example this image have a x angle of around 90° (top view)
ImageShack&#174; - Online Photo and Video Hosting

While this have an x angle of around 30°
ImageShack&#174; - Online Photo and Video Hosting

Any ideas?

Thanks.

Ps:the 3 points on the plane are disposed as a regular triangle.
• Dec 3rd 2010, 03:59 AM
HallsofIvy
Quote:

Originally Posted by RavenAll
Hi all.

I need to get some information about plane position and camera position from a pictures.
I have i plane with 3 points (red,green,blue) and then theyre coordinates inside the image.
Using circle and string i was able to get the y rotation of the plane where the points are on (the rotation of point of view)
But now i need the x rotation of the plane (the up/down angle that the camera taken the picture).
But i'm not able to find a way to get it.

This is an image of the angle i need
ImageShack&#174; - Online Photo and Video Hosting[/tex]

You have two pictures here. One is of a rectangular solid with red, green, blue arrows in x, y, and z directions, the other of a line with an angle marked x. What do you want help with? Do you want someone to measure angle x with a protractor?

Quote:

For example this image have a x angle of around 90° (top view)
ImageShack&#174; - Online Photo and Video Hosting

While this have an x angle of around 30°
ImageShack&#174; - Online Photo and Video Hosting

Any ideas?

Thanks.

Ps:the 3 points on the plane are disposed as a regular triangle.
• Dec 3rd 2010, 04:35 AM
RavenAll
Quote:

Originally Posted by HallsofIvy
You have two pictures here. One is of a rectangular solid with red, green, blue arrows in x, y, and z directions, the other of a line with an angle marked x. What do you want help with? Do you want someone to measure angle x with a protractor?

I need to get, from the pictures with 3 point (photo maked with a camera),the X angle formed between the plane and the camera. (i put the box with axis onyl to show how i orientate the axis)

Thanks.