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Question on Image transformation

Asked by Mubeen

Mubeen (view profile)

on 29 Mar 2013

Hey guys. I have a question on changing the perspective of an image. Using this resource: http://mopage.de/2011/10/perspective/ I found a way to calculate the transformation matrix, but how do I use this to create a new image with the change in perspective?

Thanks for the help!

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Mubeen

Mubeen (view profile)

3 Answers

Answer by Alex Taylor

Alex Taylor (view profile)

on 2 Apr 2013
Accepted answer

Hi Mubeen,

If you have R2013a, you should look at the class projective2d and the function imwarp.

http://www.mathworks.com/help/images/ref/imwarp.html http://www.mathworks.com/help/images/ref/projective2dclass.html

You can use projective2d to compute forward and inverse point transformations. You can use imwarp and projective2d together to form the resampled output image that is produced by applying a projective transformation.

If you are using previous versions of the Image Procesing Toolbox, you should use the analogous workflow with maketform('projective',___) and imtransform.

We refer the transformation you are referring to as a projective transformation in the Image Processing Toolbox.

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Alex Taylor

Alex Taylor (view profile)

Answer by Sean de Wolski

Sean de Wolski (view profile)

on 29 Mar 2013
doc imwarp
doc imtransform

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Sean de Wolski

Sean de Wolski (view profile)

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