ImageJ watershed and distance map

Posted by panovr on Apr 03, 2014; 8:37am
URL: http://imagej.273.s1.nabble.com/ImageJ-watershed-and-distance-map-tp5007188.html

Hi,
  I have read a interesting article about using watershed to do
segmentation by Steve of Mathworks:
http://blogs.mathworks.com/steve/2013/11/19/watershed-transform-question-from-tech-support/

  I want to use ImageJ to perform the same task on the same image in the
article.

  I use the watershed plugin of ImageJ, and the operations is like
http://rsb.info.nih.gov/ij/plugins/watershed.html describes: "invert image
(Edit/Invert), calculate the distance transform (Process/Binary/Distance
Map), invert result, apply Watershed."

  However, after calculating the distance transform, the result image is
not a BINARY image, so I can't apply the watershed filter. Am I operate
wrong? Any suggestions?

  And, Matlab's watershed commands:
  L = watershed(A);
  Lrgb = label2rgb(L);

  L is a label matrix identifying the watershed regions of the image A. Can
I get this representation by ImageJ?

  Also, Matlab command "label2rgb" can color regions in different colors,
how can I accomplish this in ImageJ?

  Thanks!

--
Yili Zhao

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