MNT: Clarify *thrP usage

fslmaths.cc

@@ -46,12 +46,12 @@ int printUsage(const string& programName)
   cout << " -div   : divide current image by following input" << endl;
   cout << " -rem   : modulus remainder - divide current image by following input and take remainder" << endl;
   cout << " -mas   : use (following image>0) to mask current image" << endl;
-  cout << " -thr   : use following number to threshold current image (zero anything below the number)" << endl;
-  cout << " -thrp  : use following percentage (0-100) of ROBUST RANGE to threshold current image (zero anything below the number)" << endl;
-  cout << " -thrP  : use following percentage (0-100) of ROBUST RANGE of non-zero voxels and threshold below" << endl;
-  cout << " -uthr  : use following number to upper-threshold current image (zero anything above the number)" << endl;
-  cout << " -uthrp : use following percentage (0-100) of ROBUST RANGE to upper-threshold current image (zero anything above the number)" << endl;
-  cout << " -uthrP : use following percentage (0-100) of ROBUST RANGE of non-zero voxels and threshold above" << endl;
+  cout << " -thr   : threshold below the following number (zero anything below the number)" << endl;
+  cout << " -thrp  : threshold below the following percentage (0-100) of ROBUST RANGE" << endl;
+  cout << " -thrP  : threshold below the following percentage (0-100) of the positive voxels' ROBUST RANGE" << endl;
+  cout << " -uthr  : upper-threshold above the following number (zero anything above the number)" << endl;
+  cout << " -uthrp : upper-threshold above the following percentage (0-100) of the ROBUST RANGE" << endl;
+  cout << " -uthrP : upper-threshold above the following percentage (0-100) of the positive voxels' ROBUST RANGE" << endl;
   cout << " -max   : take maximum of following input and current image" << endl;
   cout << " -min   : take minimum of following input and current image" << endl;
   cout << " -seed  : seed random number generator with following number" << endl;
@@ -548,7 +548,7 @@ if (!separatenoise)
     else if (string(argv[i])=="-thrP")
     {
       volume4D<T> mask(inputVolume);
-      mask.binarise(0,inputVolume.max()+1,exclusive);
+      mask.binarise();
       T lowerlimit =(T)(inputVolume.robustmin(mask)+(atof(argv[++i])/100.0)*(inputVolume.robustmax(mask)-inputVolume.robustmin(mask)));
       inputVolume.threshold(lowerlimit,inputVolume.max()+1,inclusive);
     }
@@ -564,7 +564,7 @@ if (!separatenoise)
     else if (string(argv[i])=="-uthrP")
     {
        volume4D<T> mask(inputVolume);
-       mask.binarise(0,inputVolume.max()+1,exclusive);
+       mask.binarise();
        T upperlimit = (T)(inputVolume.robustmin(mask)+(atof(argv[++i])/100.0)*(inputVolume.robustmax(mask)-inputVolume.robustmin(mask)));
        inputVolume.threshold(inputVolume.min()-1,upperlimit,inclusive);
     }