How to know an area of object using MATLAB

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I am currently stuck in this part. What I want to know is the area of an object that is highlighted in the YELLOW region above.
Please do assist me.

Accepted Answer

Image Analyst
Image Analyst on 18 Apr 2014
The image segmentation algorithm that you used to get that binary image is poor. You should improve it. Only once you can get a good binary image can you call regionprops and get meaningful data out. You're not at that point yet. Go here for "car detection" algorithms: http://iris.usc.edu/Vision-Notes/bibliography/contents.html Sorry, we can't help with your algorithm selection or implementation/development.
  7 Comments
Gary
Gary on 9 May 2014
Thanks a lot. Will update this thread if i still stuck somewhere.
Image Analyst
Image Analyst on 9 May 2014
You're welcome. Can you mark the Answer as Accepted?

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More Answers (1)

Walter Roberson
Walter Roberson on 18 Apr 2014
Edited: Walter Roberson on 18 Apr 2014
Once you have created a mask that corresponds to only the object, use regionprops() with the 'Area' option.
  11 Comments
Image Analyst
Image Analyst on 7 May 2014
There are blobs in there with areas 1, 2, or 3 as well as some very very large areas of thousands of pixels. I don't understand why having a blob with area 3 is unexpected for you.
Gary
Gary on 8 May 2014
Oh. So how am i able to get the entire area of the white colour pixel in the image above ?
I am still relatively new to MATLAB.

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