Divide ROI in three equal ROI

[andres91]

Hello everyone. I am analyzing color in single teeth on the complete tooth, its upper, middle and lower third. For that I have created an ROI by selecting the full contour, and then I have calculated each third manually with the selection tools, but it is a bit cumbersome. Is there a faster way, perhaps through a macro? I need to create three new selections of the same height respecting the initial contour.

[Cammer, Michael]

I think this does what you want.

macro "cut into thirds vertically" {
  roiManager("Add");
  firstROI = roiManager("count")-1;
  getSelectionBounds(x, y, width, height);
  third = width / 3;
  for (i=0; i<3; i++) {
    makeRectangle (x+(i*third), y, third, height);
    roiManager("Add");
    roiManager("select", roiManager("count")-1);
    roiManager("rename", "rectangle");
    roiManager("select", newArray(firstROI, roiManager("count")-1));
    roiManager("and");
    roiManager("Add");
    roiManager("deselect");
    roiManager("select", roiManager("count")-2);
    roiManager("delete");
  }
}



_________________________________________
Michael Cammer, Optical Microscopy Specialist
http://ocs.med.nyu.edu/microscopy
http://microscopynotes.com/
Cell: [phone]

________________________________________
From: andres91 [[hidden email]]
Sent: Monday, June 19, 2017 8:06 PM
To: [hidden email]
Subject: Divide ROI in three equal ROI

Hello everyone. I am analyzing the color in single teeth in the complete
tooth, its upper third, middle and lower. For that I have created an ROI by
selecting the full contour, and then I have calculated each third manually
with the selection tools, but it is a bit cumbersome. Is there a faster way,
perhaps through a macro? I need to create three new selections of the same
height respecting the initial contour.



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[andres91]

Thank you very much!! I think I wanted cut Horizontally but I managed to modify macro:

macro "cut into thirds horizontally" {
  roiManager("Add");
  firstROI = roiManager("count")-1;
  getSelectionBounds(x, y, width, height);
  third = height / 3;
  for (i=0; i<3; i++) {
    makeRectangle (x, y+(i*third), width, third);
    roiManager("Add");
    roiManager("select", roiManager("count")-1);
    roiManager("rename", "rectangle");
    roiManager("select", newArray(firstROI, roiManager("count")-1));
    roiManager("and");
    roiManager("Add");
    roiManager("deselect");
    roiManager("select", roiManager("count")-2);
    roiManager("delete");
  }
}