diff --git a/src/main/java/com/sothr/imagetools/AppCLI.java b/src/main/java/com/sothr/imagetools/AppCLI.java
index 8624fae..ae975a4 100644
--- a/src/main/java/com/sothr/imagetools/AppCLI.java
+++ b/src/main/java/com/sothr/imagetools/AppCLI.java
@@ -1,20 +1,59 @@
 package com.sothr.imagetools;
 
+import com.sothr.imagetools.image.ImageCache;
+import com.sothr.imagetools.image.SimilarImages;
+import org.apache.commons.cli.BasicParser;
+import org.apache.commons.cli.CommandLine;
+import org.apache.commons.cli.CommandLineParser;
+import org.apache.commons.cli.Options;
+import org.apache.commons.cli.Option;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import scala.collection.immutable.List;
+
+import java.text.ParseException;
 
 /**
  * CLI interface for Image Tools
  */
 class AppCLI {
 
-    private static Logger logger;
+  private static Logger logger;
+
+  public static void main(String[] args) {
+    AppConfig.configureApp();
+    logger = LoggerFactory.getLogger(AppCLI.class);
+    logger.info("Started Image Tools CLI");
+    try {
+      Options options = getOptions();
+      CommandLineParser parser = new BasicParser();
+      CommandLine cmd = parser.parse(options, args);
+      process(cmd);
+    }  catch (Exception ex) {
+      logger.error("Unhandled exception in AppCLI", ex);
+    }
+  }
+
+  private static Options getOptions() {
+    Options options = new Options();
+    options.addOption(new Option("s", true, "scan directories for a list of similar images"));
+    return options;
+  }
 
-    public static void main(String[] args) {
-        AppConfig.configureApp();
-        logger = LoggerFactory.getLogger(AppCLI.class);
-        logger.info("Started Image Tools CLI");
-        System.out.println("Hello World");
+  private static void process(CommandLine cmd) {
+    //scan a comma separated list of paths to search for image similarities
+    Engine engine = new Engine(new ImageCache());
+    if (cmd.hasOption('s')) {
+      String scanList = cmd.getOptionValue('s');
+      String[] paths = scanList.split(",");
+      for (String path : paths) {
+        List<SimilarImages> similarImages = engine.getSimilarImagesForDirectory(path);
+        for (int index = 0; index < similarImages.length(); index++) {
+          SimilarImages similar = similarImages.apply(index);
+          System.out.println(similar.toString());
+        }
+      }
     }
+  }
 
 }
diff --git a/src/main/java/com/sothr/imagetools/AppConfig.java b/src/main/java/com/sothr/imagetools/AppConfig.java
index 9b7cb09..00b03ad 100644
--- a/src/main/java/com/sothr/imagetools/AppConfig.java
+++ b/src/main/java/com/sothr/imagetools/AppConfig.java
@@ -33,6 +33,7 @@ class AppConfig {
             loadProperties();
         }
         configLogging();
+        logger.info("Detected Version: %s of Image Tools".format(PropertiesService.getVersion().toString()));
     }
 
     public static void configSimpleLogging() {
diff --git a/src/main/scala/com/sothr/imagetools/Engine.scala b/src/main/scala/com/sothr/imagetools/Engine.scala
index 1f20dec..88b13dd 100644
--- a/src/main/scala/com/sothr/imagetools/Engine.scala
+++ b/src/main/scala/com/sothr/imagetools/Engine.scala
@@ -1,6 +1,6 @@
 package com.sothr.imagetools
 
-import com.sothr.imagetools.image.{SimilarImages, ImageFilter, Image}
+import com.sothr.imagetools.image.{ImageCache, SimilarImages, ImageFilter, Image}
 import scala.collection.immutable
 import scala.collection.mutable
 import java.io.File
@@ -9,7 +9,7 @@ import grizzled.slf4j.Logging
 /**
  * Created by drew on 1/26/14.
  */
-class Engine extends Logging{
+class Engine(var imageCache:ImageCache = new ImageCache()) extends Logging{
 
   val imageFilter:ImageFilter = new ImageFilter()
 
@@ -21,7 +21,11 @@ class Engine extends Logging{
       val files = directory.listFiles(imageFilter)
       debug(s"Found ${files.length} files that are images in directory: $directoryPath")
       for (file <- files) {
-        images += ImageService.getImage(file)
+        if (imageCache.contains(file.getAbsolutePath)) {
+          images += imageCache.get(file.getAbsolutePath)
+        } else {
+          images += ImageService.getImage(file)
+        }
       }
     } else {
       error(s"Provided path: $directoryPath is not a directory")
@@ -32,10 +36,13 @@ class Engine extends Logging{
   def getSimilarImagesForDirectory(directoryPath:String):List[SimilarImages] = {
     debug(s"Looking for similar images in directory: $directoryPath")
     val images = getImagesForDirectory(directoryPath)
+    info(s"Searching ${images.length} images for similarities")
     val ignoreSet = new mutable.HashSet[Image]()
     val allSimilarImages = new mutable.MutableList[SimilarImages]()
+    var processedCount = 0
     for (rootImage <- images) {
       if (!ignoreSet.contains(rootImage)) {
+        info(s"Processed ${processedCount}/${images.length - ignoreSet.size} About ${images.length - processedCount} images to go")
         debug(s"Looking for images similar to: ${rootImage.imagePath}")
         ignoreSet += rootImage
         val similarImages = new mutable.MutableList[Image]()
@@ -53,9 +60,9 @@ class Engine extends Logging{
           debug(s"Found similar images: ${similar.toString}")
           allSimilarImages += similar
         }
+        processedCount += 1
       }
     }
     allSimilarImages.toList
   }
-
 }
diff --git a/src/main/scala/com/sothr/imagetools/image/ImageCache.scala b/src/main/scala/com/sothr/imagetools/image/ImageCache.scala
new file mode 100644
index 0000000..176b5e6
--- /dev/null
+++ b/src/main/scala/com/sothr/imagetools/image/ImageCache.scala
@@ -0,0 +1,17 @@
+package com.sothr.imagetools.image
+
+import scala.collection.mutable
+
+/**
+ * Created by drew on 1/26/14.
+ */
+class ImageCache {
+
+  private val cache = new mutable.HashMap[String, Image]()
+
+  def contains(imagePath:String) = cache.contains(imagePath)
+  def get(imagePath:String) = cache(imagePath)
+  def add(imagePath:String, image:Image) = cache.put(imagePath,image)
+  def size:Int = cache.size
+
+}
diff --git a/src/main/scala/com/sothr/imagetools/util/PropertiesService.scala b/src/main/scala/com/sothr/imagetools/util/PropertiesService.scala
index 4463bca..0f7eb58 100644
--- a/src/main/scala/com/sothr/imagetools/util/PropertiesService.scala
+++ b/src/main/scala/com/sothr/imagetools/util/PropertiesService.scala
@@ -12,6 +12,7 @@ object PropertiesService extends Logging {
 
   private val properties:Properties = new Properties()
   private var version:Version = null
+  def getVersion:Version = this.version
   private val propertiesToClean:Array[String] = Array("version")
 
   /*