Added std:: to some functions to avoid potential ambiguity.

dlib/pixel.h

@@ -699,8 +699,8 @@ namespace dlib
             HSL c2;
             using namespace std;
 
-            themin = min(c1.r,min(c1.g,c1.b));
-            themax = max(c1.r,max(c1.g,c1.b));
+            themin = std::min(c1.r,std::min(c1.g,c1.b));
+            themax = std::max(c1.r,std::max(c1.g,c1.b));
             delta = themax - themin;
             c2.l = (themin + themax) / 2;
             c2.s = 0;
@@ -743,9 +743,9 @@ namespace dlib
                 sat.g = 0;
                 sat.b = (360 - c1.h) / 60.0;
             }
-            sat.r = min(sat.r,1.0);
-            sat.g = min(sat.g,1.0);
-            sat.b = min(sat.b,1.0);
+            sat.r = std::min(sat.r,1.0);
+            sat.g = std::min(sat.g,1.0);
+            sat.b = std::min(sat.b,1.0);
 
             ctmp.r = 2 * c1.s * sat.r + (1 - c1.s);
             ctmp.g = 2 * c1.s * sat.g + (1 - c1.s);