hi can i get the co-ordinates of any image against template image co-ordinates?

I have the two images one is row image with and other is its template image (matching image) ..now my basic aim is to identify location of particular shape say omr bubble on the row image ...

is there any way that i can give - the location of matched image and the same omr bubble (rectangle) or any other thing say barcode to MATLAB and in return matlab will give me the locations of the same thing in my actual row image...:>

i am trying this stuff using Computer vision toolbox functions ...:>

pls let me know if you can help me ...:>

thanks in advance ...:>

Answer 1

[Image Analyst]

Use normxcorr2(), as shown in this thread: http://www.mathworks.com/matlabcentral/answers/24467-identifying-objects-in-a-picture-containing-several-objects

[meghna bhatt]

thank you very much for your attenstion to my issue i have tried your suggestion its working but here you have cropped the template from the original image .. In the case of different template its not giving accurate result every time... and also its only giving one object matched.. what if i have to find multiple objects....

[Image Analyst]

If your template is not a good match for anything in your image (like it was cropped from it), then I suggest you look into the SURF algorithm. http://en.wikipedia.org/wiki/SURF I've seen impressive results when using SURF in CBIR, like "Find the painting in the picture" or "Find me all pictures in this database collection of photos that have a house in them"

[meghna bhatt]

hi I have tried using detectSURFFeatures and matchFeatures of Computer vision toolbox but again its giving me the redundant points of matching...

my aim is to get exact location and points on which omr bubbles are located..

[Image Analyst]

I don't know what "omr" means.

How can we help?

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

[meghna bhatt]

OMR means Optical mark recognition sheet .. I am talking about bubble(circle).. I have the image in which i have multiple such omr's and i want to find the locations of those each particular bubble and recognize it..