[ITK-users] Registration

[Dženan Zukić]

Hi Prakash,

what you might do is create mask of your deployed antenna and save it along
your reference image of the antenna. Then in field, acquire a new image,
apply
<https://itk.org/ITKExamples/src/Filtering/LabelMap/MaskOneImageGivenLabelMap/Documentation.html>
the mask to both reference and field images, and then do a difference. Try
it with several different field images with different lighting and states
of deployment of the antenna to figure out a dependence of pixel-wise
difference in images and whether antenna was deployed properly.

Regards,
Dženan

On Sat, Dec 9, 2017 at 2:28 AM, Surya Prakash <ds_prakash at rediffmail.com>
wrote:

> Hi Dženan
> Thank you very much for your help and guidance.
> The images I am working with are 2D. Camera position is fixed with respect
> to Antenna. Assuming there are no variations in foreground and background.
> Lighting / Illumination may differ from lab and field conditions.
> In the lab, images are acquired in still condition. Even though camera is
> fixed with respect to each other, the entire system is not stationary but
> moving.
> Waiting for your advise
>
> Thanks & regards
> Prakash
>
> On Fri, 08 Dec 2017 20:27:39 +0530 Dženan Zukić wrote
> >Hi Prakash,
> are the images you are working with 3D or 2D? If 2D, do they have variable
> lighting, variable background, variable foreground (maybe something
> obscuring the antenna)? Does the camera move relative to antenna or not?
> In the simplest case (camera not moving, lighting, foreground and
> background not variable) you don't need to do any registration, just
> subtract the images (reference and current) and compare difference against
> a threshold to judge whether the antenna deployed. And each added variable
> in the imaging process makes your task much harder.
> Is the camera just pivoting in a fixed position? You could get away with
> translation only during registration. Camera moving and pivoting, but
> pointing at the same location? You will need deformable registration,
> probably with manual initialization too. And so forth.
> If you want more specific advice, be more specific in your question. And
> show us some example images (reference and those being examined).
> And you might as well post it on discourse, more people will see it as we
> moved the discussions there.
> Regards,Dženan
>
> On Thu, Dec 7, 2017 at 11:01 PM, Surya Prakash wrote:
> Hi Dženan,
>
> Thanks for the reply. Earlier I was using ITK and after a long gap again I
> required it. Actually I am planning to use ITK for whether an antenna is
> deployed properly or not. I have antenna images (reference). I want to
> match the image of deployed antenna with the reference images to judge
> whether it is deployed properly or not. There are two things.
>
> 1. If needed I should be able to register my present image with reference
> image without using any control points (if possible)
>
> 2. Automatic change / difference between the images.
>
> As the example list is too vast can you please suggest what will be the
> right choice for me.
>
>
>
> Thanks & regards
>
> Prakash
>
>
>
>
>
> On Thu, 07 Dec 2017 20:18:17 +0530 Dženan Zukić wrote
>
> >Hi Surya,
>
> there are plenty of example for registration. You could take a look at the
> ones on the wiki.
>
> Regards,Dženan
>
> On Thu, Dec 7, 2017 at 2:09 AM, Surya Prakash wrote:
>
> Hi all
>
>
>
> I have some reference images acquired previously. Current images I want to
> register with those images. What examples of ITK I should follow
>
>
>
>
>
>
>
> Thanks & regards
>
>
>
> Prakash
>
>
>
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