diff --git a/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/Collect2dTargetsPipe.java b/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/Collect2dTargetsPipe.java
index c035e138e..51747cfdd 100644
--- a/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/Collect2dTargetsPipe.java
+++ b/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/Collect2dTargetsPipe.java
@@ -41,6 +41,8 @@ public class Collect2dTargetsPipe implements Pipe<List<RotatedRect>, List<CVPipe
     public Pair<List<CVPipeline2d.Target2d>, Long> run(List<RotatedRect> input) {
         long processStartNanos = System.nanoTime();
 
+        targets.clear();
+
         input.forEach(r -> {
             CVPipeline2d.Target2d t = new CVPipeline2d.Target2d();
             t.rawPoint = r;
diff --git a/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/FilterContoursPipe.java b/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/FilterContoursPipe.java
index b77b04016..97acea6aa 100644
--- a/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/FilterContoursPipe.java
+++ b/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/FilterContoursPipe.java
@@ -38,6 +38,8 @@ public class FilterContoursPipe implements Pipe<List<MatOfPoint>, List<MatOfPoin
     public Pair<List<MatOfPoint>, Long> run(List<MatOfPoint> input) {
         long processStartNanos = System.nanoTime();
 
+        filteredContours.clear();
+
         for (MatOfPoint Contour : input) {
             try {
                 double contourArea = Imgproc.contourArea(Contour);
diff --git a/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/FindContoursPipe.java b/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/FindContoursPipe.java
index 5a7f77adf..bf57d57d1 100644
--- a/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/FindContoursPipe.java
+++ b/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/FindContoursPipe.java
@@ -18,6 +18,8 @@ public class FindContoursPipe implements Pipe<Mat, List<MatOfPoint>> {
     public Pair<List<MatOfPoint>, Long> run(Mat input) {
         long processStartNanos = System.nanoTime();
 
+        foundContours.clear();
+
         Imgproc.findContours(input, foundContours, new Mat(), Imgproc.RETR_EXTERNAL, Imgproc.CHAIN_APPROX_TC89_L1);
 
         long processTime = System.nanoTime() - processStartNanos;
diff --git a/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/GroupContoursPipe.java b/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/GroupContoursPipe.java
index 89bc37cc3..8ced26acf 100644
--- a/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/GroupContoursPipe.java
+++ b/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/GroupContoursPipe.java
@@ -39,6 +39,8 @@ public class GroupContoursPipe implements Pipe<List<MatOfPoint>, List<RotatedRec
     public Pair<List<RotatedRect>, Long> run(List<MatOfPoint> input) {
         long processStartNanos = System.nanoTime();
 
+        groupedContours.clear();
+
         List<MatOfPoint> sorted = new ArrayList<>(input);
         sorted.sort(sortByMomentsX);
 
diff --git a/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/SortContoursPipe.java b/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/SortContoursPipe.java
index 457a7ae68..a6e28f1c7 100644
--- a/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/SortContoursPipe.java
+++ b/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/SortContoursPipe.java
@@ -43,27 +43,30 @@ public class SortContoursPipe implements Pipe<List<RotatedRect>, List<RotatedRec
     public Pair<List<RotatedRect>, Long> run(List<RotatedRect> input) {
         long processStartNanos = System.nanoTime();
 
+        sortedContours.clear();
+        sortedContours.addAll(input);
+
         switch (sort) {
             case Largest:
-                input.sort(SortByLargestComparator);
+                sortedContours.sort(SortByLargestComparator);
                 break;
             case Smallest:
-                input.sort(SortBySmallestComparator);
+                sortedContours.sort(SortBySmallestComparator);
                 break;
             case Highest:
-                input.sort(SortByHighestComparator);
+                sortedContours.sort(SortByHighestComparator);
                 break;
             case Lowest:
-                input.sort(SortByLowestComparator);
+                sortedContours.sort(SortByLowestComparator);
                 break;
             case Leftmost:
-                input.sort(SortByLeftmostComparator);
+                sortedContours.sort(SortByLeftmostComparator);
                 break;
             case Rightmost:
-                input.sort(SortByRightmostComparator);
+                sortedContours.sort(SortByRightmostComparator);
                 break;
             case Centermost:
-                input.sort(SortByCentermostComparator);
+                sortedContours.sort(SortByCentermostComparator);
                 break;
             default:
                 break;
diff --git a/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/SpeckleRejectPipe.java b/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/SpeckleRejectPipe.java
index 5fe11e479..7edebf7f7 100644
--- a/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/SpeckleRejectPipe.java
+++ b/Main/src/main/java/com/chameleonvision/vision/pipeline/pipes/SpeckleRejectPipe.java
@@ -25,6 +25,8 @@ public class SpeckleRejectPipe implements Pipe<List<MatOfPoint>, List<MatOfPoint
     public Pair<List<MatOfPoint>, Long> run(List<MatOfPoint> input) {
         long processStartNanos = System.nanoTime();
 
+        despeckledContours.clear();
+
         double averageArea = 0.0;
 
         for (MatOfPoint c : input) {