i want to detect just the ROI from the image.

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???

Answer 1

[Image Analyst]

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.

[Image Analyst]

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.