i want to detect just the ROI from the image.

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BV
BV 2013-4-13
In a binary image I have two objects , from which I wanted to detect just one object and neglect the others. Is there any sutomated detection to find object other tham selecting ROI by roipoly, imfreehand, roicolor etc???

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Image Analyst
Image Analyst 2013-4-13
There are lots of ways to define an ROI. Take a look at my BlobsDemo Image Segmentation Tutorial where I define the foreground ROI on the basis of intensity. You can also do it based on color, different from a prior frame of video, etc. etc.
If you want me to post my demo where you can extract the N largest or smallest blobs, let me know.
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Image Analyst
Image Analyst 2013-4-14
I'm not sure what you mean. I do do that. I gave the link and in the code it shows, with comments, how the blobs are extracted by thresholding and labeling. If there is something more helpful that I can do, then let me know, but be more specific.

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