I Need to align these two fiducial marks?i am new to image processing and i dont have any idea about how to do it.so can any one help me with the code

[Image Analyst]

Can you attach each image separately?

[vicky v]

Sorry,I dont have seperate images.This is the aligned image,it might be of some help..

[Matt J]

If you already have the aligned image, what work needs to be done?

[vicky v]

i need to align the mis aligned marks.In real time???

I am working on an alignment sysytem

[Image Analyst]

My algorithm below works on only a frame at a time but it might be fast enough to appear "real time". Did you even attempt it?

[Matt J]

@vicky, if the image you have posted is just an example, then please post more example images so we get a more complete sense of the problem.

[vicky v]

@matt

Answer 1

[Image Analyst]

1. Threshold,
2. use bwareafilt to extract largest blob (the L-shaped blob).
3. Use regionprops() to compute centroid.
4. Compute deltax and deltay from reference image.

Answer 2

[vicky v]

@Image analyst,this image is after using otsu threshold method.

when i use bwareafilt the whole image goes black??

i need to find the centroid of both the marks?

[Image Analyst]

Again, you need a reference (fixed) image, and a moving image -- TWO images, not a single image. Then you can try imregister() or friends.

[vicky v]

So you are saying i need a database of reference images?

Other problem is the marks are dynamic.It can be square,circular or the above L shaped marks.

can you suggest an generalized algorithm,so that it could work for any of the marks used.

i thought of using pattern matching.

[vicky v]

@image analyst

what if the image is occluded??

[Image Analyst]

Some of the registration functions they have are more robust as to how much of the images need to overlap and how much can be different/missing/occluded.

[vicky v]

i am unable to find the centroid of the mark in backside???

[Image Analyst]

I have no idea what the backside is. Please attach the images containing ONLY the light L+ and the image containing ONLY the dark L+. We don't want one where the light L+ is superimposed over the dark L+ image.

[vicky v]

Sir i understand, but i don't have those image??

[Image Analyst]

Well how can we align (translate) a light L+ image to match the L+ position in a dark L+ image if you don't have each image separately?

Please supply a mock up of what image you'd like to end up with.

[vicky v]

@image analyst

[Image Analyst]

Uh, okay, but what two images do you want to superimpose to create that? Where are your two input images -- the fixed one, and the "moving" one which is the one that will be translated to overlap your "fixed" one?

[vicky v]

the light l+ is movable,the dark l+mark is fixed...

[Image Analyst]

SO, since you didn't provide the two images, I brought the single image into Photoshop to create the two images.

So is the movable one this:

and the fixed one this:

????

Would those be your two images? If so, can you post the actual two images so we're working off yours and not the Photoshop created versions?

What I'd probably do is to find the centroids of the two shapes and find the average delta x and delta y from the fixed image, and then use imtranslate to shift the moving one so the shapes are in the same location as the fixed image.

[vicky v]

Yes sir these are the two input images, I have asked them for seperate images but they said they don't have it..

I need work on this only.

Can't we use this sir.

[vicky v]

sir i have completed the motor control part,only this alignment part is not completed.

How to use this to regenerate the occluded image??