Re: Filter a color

Posted by Gabriel Landini on Sep 20, 2010; 4:22pm
URL: http://imagej.273.s1.nabble.com/Filter-a-color-tp3686882p3686887.html

On Monday 20 Sep 2010  17:14:29 you wrote:
> but the thing is that I specially want to see the pink ring!
> Because it gives me information how fast the ring gets bigger during the
> rotation of the device.
> I am sorry that I could not explain my problem very well!
> ...Do you thing there is an opportunity to do this?

You can try the Threshold_Colour in my page (not the one built in IJ because
it cannot record macros).

http://www.dentistry.bham.ac.uk/landinig/software/thresholdcolour.zip

With that, I recorded this, whcih may help:

// Colour Thresholding v1.12-------
// Autogenerated macro, single images only!
// G Landini 19/Dec/2009.
//
min=newArray(3);
max=newArray(3);
filter=newArray(3);
a=getTitle();
run("HSB Stack");
run("Convert Stack to Images");
selectWindow("Hue");
rename("0");
selectWindow("Saturation");
rename("1");
selectWindow("Brightness");
rename("2");
min[0]=194;
max[0]=241;
filter[0]="pass";
min[1]=38;
max[1]=255;
filter[1]="pass";
min[2]=140;
max[2]=255;
filter[2]="pass";
for (i=0;i<3;i++){
  selectWindow(""+i);
  setThreshold(min[i], max[i]);
  run("Convert to Mask");
  if (filter[i]=="stop")  run("Invert");
}
imageCalculator("AND create", "0","1");
imageCalculator("AND create", "Result of 0","2");
for (i=0;i<3;i++){
  selectWindow(""+i);
  close();
}
selectWindow("Result of 0");
close();
selectWindow("Result of Result of 0");
rename(a);
// Colour Thresholding-------------