diff --git a/MagickCore/quantize.c b/MagickCore/quantize.c
index 90d5f35e59..327147d0fc 100644
--- a/MagickCore/quantize.c
+++ b/MagickCore/quantize.c
@@ -2382,6 +2382,8 @@ MagickExport MagickBooleanType KmeansImage(Image *image,
   const double max_distortion,ExceptionInfo *exception)
 {
 #define KmeansImageTag  "Kmeans/Image"
+#define RandomPixel(random_info)  \
+  (QuantumRange*GetPseudoRandomValue(random_info))
 
   CacheView
     *image_view;
@@ -2482,15 +2484,16 @@ MagickExport MagickBooleanType KmeansImage(Image *image,
           /*
             Seed with random pixels in image.
           */
-          image_view=AcquireAuthenticCacheView(image,exception);
           random_info=AcquireRandomInfo();
           for ( ; n < (ssize_t) image->colors; n++)
-            (void) GetOneCacheViewVirtualPixelInfo(image_view,
-              (ssize_t) (GetPseudoRandomValue(random_info)*image->columns),
-              (ssize_t) (GetPseudoRandomValue(random_info)*image->rows),
-              kmeans_colormap+n,exception);
+          {
+            kmeans_colormap[n].red=RandomPixel(random_info);
+            kmeans_colormap[n].green=RandomPixel(random_info);
+            kmeans_colormap[n].blue=RandomPixel(random_info);
+            kmeans_colormap[n].alpha=RandomPixel(random_info);
+            kmeans_colormap[n].black=RandomPixel(random_info);
+          }
           random_info=DestroyRandomInfo(random_info);
-          image_view=DestroyCacheView(image_view);
         }
     }
   (void) memcpy(image->colormap,kmeans_colormap,image->colors*
diff --git a/MagickCore/random.c b/MagickCore/random.c
index 7ca7fffbaa..b99dd63a7f 100644
--- a/MagickCore/random.c
+++ b/MagickCore/random.c
@@ -182,7 +182,7 @@ MagickExport RandomInfo *AcquireRandomInfo(void)
   random_info->reservoir=AcquireStringInfo(GetSignatureDigestsize(
     random_info->signature_info));
   ResetStringInfo(random_info->reservoir);
-  random_info->normalize=1.0/MagickULLConstant(~0);
+  random_info->normalize=1.0/(double) MagickULLConstant(~0);
   random_info->seed[0]=MagickULLConstant(0xd2a98b26625eee7b);
   random_info->seed[1]=MagickULLConstant(0xdddf9b1090aa7ac1);
   random_info->secret_key=secret_key;
@@ -239,7 +239,7 @@ MagickExport RandomInfo *AcquireRandomInfo(void)
       FinalizeSignature(signature_info);
       digest=GetSignatureDigest(signature_info);
       (void) memcpy(random_info->seed,GetStringInfoDatum(digest),
-        MagickMin(GetSignatureDigestsize(signature_info),
+        MagickMin((size_t) GetSignatureDigestsize(signature_info),
         sizeof(*random_info->seed)));
       signature_info=DestroySignatureInfo(signature_info);
     }
@@ -410,8 +410,8 @@ static StringInfo *GenerateEntropicChaos(RandomInfo *random_info)
 
     if (gettimeofday(&timer,(struct timezone *) NULL) == 0)
       {
-        seconds=timer.tv_sec;
-        nanoseconds=1000UL*timer.tv_usec;
+        seconds=(size_t) timer.tv_sec;
+        nanoseconds=(size_t) (1000UL*timer.tv_usec);
       }
   }
 #endif
@@ -621,7 +621,7 @@ MagickExport double GetPseudoRandomValue(RandomInfo *random_info)
 	seed1^=seed0;
 	random_info->seed[0]=RandomROTL(seed0,24) ^ seed1 ^ (seed1 << 16);
 	random_info->seed[1]=RandomROTL(seed1,37);
-	return(random_info->normalize*value);
+	return(random_info->normalize*(double) value);
 }
 
 /*