Re: Locate The Center of WhiteDot from a Image
Christopher Barker <[email protected]>
| Newsgroups | gmane.comp.python.image |
|---|---|
| Message-ID | <[email protected]> |
On 1/7/11 10:14 AM, Narendra Sisodiya wrote: > This Code Look for bounding box which I am calculating by scanning each > row and column one by one. If I am finding any white pixel, I am > including it into my bounding box. > 1) there may a change that 2 or more WhiteDOT may present. One is Big > whiedot and other are very smaller whitedot(just 2-3 pixel) near to this > Big whitedot. Not sure about this one off the top of myhead, but I"d suspect some smoothing may take care of it. > I am applying this > algorithm on every frame taken from camera at 2fps. So I want a high > speed algorithm. PIL must be having some function or trick to do it. The Image..getbbox() method should do it. If you need more math, numpy can help. Somethign like: a = np.asarray(PIL_image) background_color = 0 rows, cols = np.where(a <> background_color) # background color a uint32 BB = (rows.min(), rows.max(), cols.min(), cols.max()) -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R (206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception [email protected] _______________________________________________ Image-SIG maillist - [email protected] http://mail.python.org/mailman/listinfo/image-sig