Re: De-skew distorted image

Posted by Rainer M. Engel on Apr 20, 2011; 12:59pm
URL: http://imagej.273.s1.nabble.com/De-skew-distorted-image-tp3684884p3684887.html

Am 20.04.2011 06:54, schrieb nan0guy:

> I have topographic data (converted to greyscale) from force microscopy that
> is distorted by drift in a fairly uniform way. The rate of drift is not
> know, but since the structure has a well-defined geometric structure, I can
> establish an a priori scan distortion (assuming it is linear).
>
> My question is, how can I apply such a distortion to the data in ImageJ?
> What I am looking for is the equivalent of the skew transformation in
> Photoshop.  This could probably be done with a line by line shift of the
> data, but I do not know how to do this.
>
> If anyone knows of a plugin which can do this, or could provide me with some
> direction of how to modify an image line by line, I would appreciate it.
>

You may want to do it in Photoshop once and if it's uniform you can use
bUnwarpJ (included in fiji i.e.) to calculate the transform between
source and your de-skewed image.

Then you can batch whole directories of skewed images with this data set.

good luck,
Rainer