filter out entities without normalized scores

Author: cgoina

colormipsearch-api/src/main/java/org/janelia/colormipsearch/model/CDMatchEntity.java

@@ -27,6 +27,10 @@ void setNormalizedScore(Float normalizedScore) {
         this.normalizedScore = normalizedScore;
     }
 
+    public boolean hasNormalizedScore() {
+        return normalizedScore != null;
+    }
+
     public Integer getMatchingPixels() {
         return matchingPixels;
     }

colormipsearch-tools/src/main/java/org/janelia/colormipsearch/cmd/dataexport/AbstractCDMatchesExporter.java

@@ -107,6 +107,7 @@ List<CDMatchEntity<M, T>> selectBestMatchPerMIPPair(List<CDMatchEntity<? extends
         // one mask MIP ID may have multiple matches with the same target MIP ID
         // here we only keep the best target MIP ID for the mask MIP ID
         return cdMatchEntities.stream()
+                .filter(CDMatchEntity::hasNormalizedScore)
                 .filter(this::doesNotLookSuspicious)
                 .collect(Collectors.collectingAndThen(
                         Collectors.toMap(