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Topic: A question about image registration
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maniacWaltz

Posts: 16
Registered: 4/10/08
A question about image registration
Posted: Nov 2, 2009 12:39 AM
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I am self learning image registration using matlab.

Suppose I want to study the shrinking speed of a water pool in a desert within a month. The camera's position and orientation is fixed on a tree nearby. Three markers are placed around the pool as a reference, like this:

*

pooooool

* *

then I took an image to record its initial position. But I forgot to record the elevation of the camera.

After a month I came back, I noticed that my camera has been stolen and the tree cut down, but the markers' inital positions still. I have to continue the study and then took another image that includes the pool and all the three initial markers, but this time at a different elevation and orientation, both of which are unknown.

*


* pool

*

Can I still accurately measure the ratio of pool size change? If yes, which transformation shall I apply to achieve this? Affine theorem or projective theorem?



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