evaluate diameter of moving bubbles
1 view (last 30 days)
Show older comments
emanuele teodori on 22 Nov 2011
i'd like to measure the diameter of one or more moving bubbles. there's someone that already tried it? furthermore i'd like to Know the position of the center of a circular shape approximating the bubble.
Walter Roberson on 23 Nov 2011
It isn't clear to me that "diameter" of a bubble is a meaningful measurement. For example, how does one measure the "diameter" of the bubble shown at http://www.worldslargestbubble.com/gwr.html ?
Hin Kwan Wong on 23 Nov 2011
What's the acquisition device? From a 2D image or 3D model?
If you have good image processing so that the bubble is a silhouette or a 3D model
Then you can use data processing to find out the total area (for 2D) or volume (for 3D). This is then compared to the circle formula or sphere volume formula to find a equivalent diameter and translate it to real world units base on the image acquisition device
Image Analyst on 23 Nov 2011
Where did you post your image? You did post it somewhere before you asked here, didn't you??? Otherwise all I can say is to use image processing, or try out my BlobsDemo where I find the diameter of coins: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862
Find more on Image Segmentation and Analysis in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!Start Hunting!