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winnie

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Comments and Ratings by winnie View all
Updated File Comments Rating
09 Feb 2010 B-spline Grid, Image and Point based Registration B-spline registration of two 2D / 3D images or corrsp. points, affine and with smooth b-spline grid. Author: Dirk-Jan Kroon

Hi Dirk,

I have just been trying to register an image to a template using your script, but unfortunately it did not work. I used all the default options. Here is a summary of the output:

Start Affine part of Non-Rigid registration
...
Optimizer Results
Algorithm Used: limited memory BFGS (L-BFGS)
Exit message : Change in the objective function value was less than the specified tolerance TolFun.
... (repeat twice)

Start non-rigid b-spline grid registration
Current Grid size : 7x7
...
Optimizer Results
Algorithm Used: limited memory BFGS (L-BFGS)
Exit message : Change in the objective function value was less than the specified tolerance TolFun.
...
Registration Refinement
Current Grid size : 11x11
...
Optimizer Results
Algorithm Used: limited memory BFGS (L-BFGS)
Exit message : Line search cannot find an acceptable point along the current search
...
Registration Refinement
Current Grid size : 19x19
...
Optimizer Results
Algorithm Used: limited memory BFGS (L-BFGS)
Exit message : Line search cannot find an acceptable point along the current search

Then the program quits without doing any registration, as far as I can tell. I was just wondering whether you had any suggestions that I might try. For example, could I increase the specified tolerance TolFun somehow?

Thanks, Winnie

26 Jan 2009 Image: Select ROI This function provides GUI for selecting ROI of square/rectangular shape. Author: Andriy Nych

Never mind, it was just a problem of contrast. I converted my image using mat2gray first, then it works. Thanks!

26 Jan 2009 roitool Interactive roi definition tool Author: Laszlo Balkay

I tried this tool today, but I could not retrieve the output. All it gave me was a single number... Any ideas? I need an output telling me the ROI co-ordinates!

26 Jan 2009 Image: Select ROI This function provides GUI for selecting ROI of square/rectangular shape. Author: Andriy Nych

This sounds like what I am looking for, unfortunately I do not see my image when calling imSelectRoi(myimg);
I am using a 512x512 double image, which imshow displays without problems. Any ideas?

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