displacement vector

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shah baba 2011-5-23

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https://ww2.mathworks.cn/matlabcentral/answers/8030-displacement-vector

评论： Sharaz Haider 2021-11-17

采纳的回答： Alex Taylor

Hi, I have two images of same size such that

im1_o=image at time 0

im2_1=image at time 1

I want to compute displacement vetor for these two images using intensity correlation for given Window size (odd). I donot understand where to start. Can I use some builtin function of matlab? Any help or link to some code.

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Sharaz Haider 2021-11-17

Sharaz Haider 2021-11-17

any thing like this available?

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Alex Taylor 2011-5-25

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If you look at the cross correlation registration demo in the Image Processing Toolbox, you'll see how normxcorr2 can be used to solve for the displacement vector you are interested in.

http://www.mathworks.com/products/demos/image/cross_correlation/imreg.html

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Sh Ahmadi 2019-6-2

编辑：Sh Ahmadi 2019-6-2

Hi , I'm tring to open this link , but is not active. How I can log in to this link ?

Sharaz Haider 2021-11-17

any solution plzz

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Aaronne 2011-8-25

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编辑：John Kelly 2014-5-27

I guess you are looking for something at the end the page

Use 'quiver' function.

Thanks.

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Sean de Wolski 2011-5-23

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https://ww2.mathworks.cn/matlabcentral/answers/8030-displacement-vector#answer_11029

在 MATLAB Online 中打开

doc normxcorr2

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Sean de Wolski 2011-5-24

But the object is changing size (i.e. morphing) and so what you want is the new area defined by the flood. This is not a displacement vector as there is something completely new in the image. A displacement vector is the change in location of an object in BOTH images. So what you want to do is register the images to the best of your ability and then do an image comparison, such as a subtraction/area calculation/segmentation etc, to figure out how much has flooded. Post your images if you want better answers.

shah baba 2011-5-24

Thanx for your kind reply. Infact I need only displacement vector.

Situation:

I have image of object (going under deformation) at 0 epoch and n Epoch.

I can get difference when I have displacement_vector1 (image1-image0) based on correlation and then I make image of displacement_vector1. Length of vector is displacement.

Now Why I registered first to avoide instability of camera during experiment.

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