How can i compare 2 images and find its size using opencv (c++)?

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I Have 2 Images. I want to compare the object in an image with another picture.Consider 1st image as a doll(10CM) in an image. 2nd image is the image of toys including the doll(10CM) object. I Want to find the doll(10CM) in the 2nd pic.

if one pic among them is in affine transform, then how can I compare the 2 images. Also I want to measure the object size in an image.

What I have tried:

I am using Visual studio 2013. Trying OpenCv code in Vc++. Before i used EMGUCV with C#. I can't able to find the object rotation angle from an image. so i am trying in OpenCV. i m new to this.

Posted 27-Feb-16 1:39am

Member 12275007

Updated 27-Feb-16 2:03am

nv3

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Member 12275007 1-Mar-16 1:49am

Thank u for ur valuable suggestion. I am trying the examples given in the internet and referring some Materials for the OpenCV Learning Purpose. So far I didn't get any idea about how I am going to approach the task.

Now I can understand the code and why they are keeping such thing and all. But I need the techniques to approaching this.

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nv3 · Answer 1 · 2016-02-27T02:03:00

Solution 1

You are trying yourself on one of the most difficult subjects in image processing. And as you say you are new to the subject. I think you will have to take smaller steps and get acquainted to the elementary image processing techniques first. Starting with a project like this is like a beginner in piano playing starting with a piano concerto before even managing to play the major scales.

Posted 27-Feb-16 2:03am

nv3

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Member 12275007 1-Mar-16 0:32am

Thank u for ur valuable suggestion. I am trying the examples given in the internet and referring some Materials for the OpenCV Learning Purpose. So far I didn't get any idea about how I am going to approach the task.

Now I can understand the code and why they are keeping such thing and all. But I need the techniques to approaching this.