diff --git a/jochre_core/pom.xml b/jochre_core/pom.xml
index 2b408db..8384a89 100644
--- a/jochre_core/pom.xml
+++ b/jochre_core/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.joliciel.jochre</groupId>
     <artifactId>jochre-parent</artifactId>
-    <version>2.6.2</version>
+    <version>2.6.3-SNAPSHOT</version>
     <relativePath>../jochre_parent</relativePath>
   </parent>
   <build>
diff --git a/jochre_core/src/main/java/com/joliciel/jochre/Jochre.java b/jochre_core/src/main/java/com/joliciel/jochre/Jochre.java
index 8e49615..620f7b5 100644
--- a/jochre_core/src/main/java/com/joliciel/jochre/Jochre.java
+++ b/jochre_core/src/main/java/com/joliciel/jochre/Jochre.java
@@ -128,6 +128,8 @@
 import com.typesafe.config.Config;
 import com.typesafe.config.ConfigFactory;
 
+import javax.imageio.ImageIO;
+
 /**
  * Class encapsulating the various top-level Jochre commands and command-line
  * interface.
@@ -1091,10 +1093,10 @@ public void doCommandAnalyse(File sourceFile, MostLikelyWordChooser wordChooser,
         || sourceFile.getName().toLowerCase().endsWith(".jpg") || sourceFile.getName().toLowerCase().endsWith(".jpeg")
         || sourceFile.getName().toLowerCase().endsWith(".gif") || sourceFile.getName().toLowerCase().endsWith(".tif")
         || sourceFile.getName().toLowerCase().endsWith(".tiff")) {
-      ImageDocumentExtractor extractor = new ImageDocumentExtractor(sourceFile, documentGenerator);
+      ImageFileDocumentExtractor extractor = new ImageFileDocumentExtractor(sourceFile, documentGenerator);
       extractor.extractDocument();
     } else if (sourceFile.isDirectory()) {
-      ImageDocumentExtractor extractor = new ImageDocumentExtractor(sourceFile, documentGenerator);
+      ImageFileDocumentExtractor extractor = new ImageFileDocumentExtractor(sourceFile, documentGenerator);
       extractor.extractDocument();
     } else {
       throw new RuntimeException("Unrecognised file extension");
@@ -1337,7 +1339,7 @@ public void doCommandSegment(String filename, String userFriendlyName, File outp
       pdfDocumentProcessor.process();
     } else if (filename.toLowerCase().endsWith(".png") || filename.toLowerCase().endsWith(".jpg")
         || filename.toLowerCase().endsWith(".jpeg") || filename.toLowerCase().endsWith(".gif")) {
-      ImageDocumentExtractor extractor = new ImageDocumentExtractor(file, jochreDocumentGenerator);
+      ImageFileDocumentExtractor extractor = new ImageFileDocumentExtractor(file, jochreDocumentGenerator);
       extractor.extractDocument();
     } else {
       throw new RuntimeException("Unrecognised file extension");
@@ -1534,13 +1536,18 @@ public void imageFileToAlto4(File sourceFile, Writer writer) throws IOException
   }
 
   public void imageInputStreamToAlto4(InputStream inputStream, String fileName, Writer writer) throws IOException {
+    BufferedImage image = ImageIO.read(inputStream);
+   this.imageToAlto4(image, fileName, writer);
+  }
+
+  public void imageToAlto4(BufferedImage image, String fileName, Writer writer) throws IOException {
     final Set<Integer> myPages = new HashSet<>();
     MostLikelyWordChooser wordChooser = new MostLikelyWordChooser(jochreSession);
     List<DocumentObserver> documentObservers = new ArrayList<>();
     AltoXMLExporter altoXMLExporter = new AltoXMLExporter(writer, 4);
     documentObservers.add(altoXMLExporter);
     JochreDocumentGenerator documentGenerator = this.getDocumentGenerator(fileName, wordChooser, myPages, documentObservers, new ArrayList<>());
-    InputStreamDocumentExtractor documentExtractor = new InputStreamDocumentExtractor(inputStream, fileName, documentGenerator);
+    ImageDocumentExtractor documentExtractor = new ImageDocumentExtractor(image, fileName, documentGenerator);
     documentExtractor.extractDocument();
   }
 }
diff --git a/jochre_core/src/main/java/com/joliciel/jochre/doc/ImageDocumentExtractor.java b/jochre_core/src/main/java/com/joliciel/jochre/doc/ImageDocumentExtractor.java
index 36c5872..644b07c 100644
--- a/jochre_core/src/main/java/com/joliciel/jochre/doc/ImageDocumentExtractor.java
+++ b/jochre_core/src/main/java/com/joliciel/jochre/doc/ImageDocumentExtractor.java
@@ -18,22 +18,18 @@
 //////////////////////////////////////////////////////////////////////////////
 package com.joliciel.jochre.doc;
 
-import java.awt.image.BufferedImage;
-import java.io.File;
-import java.io.FilenameFilter;
-
-import javax.imageio.ImageIO;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import com.joliciel.talismane.utils.Monitorable;
 import com.joliciel.talismane.utils.MultiTaskProgressMonitor;
 import com.joliciel.talismane.utils.ProgressMonitor;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.io.InputStream;
 
 /**
- * An interface for extracting a JochreDocument from an image File (jpeg, gif or
- * png).
+ * An interface for extracting a JochreDocument from an image input stream.
  * 
  * @author Assaf Urieli
  *
@@ -42,12 +38,14 @@ public class ImageDocumentExtractor implements Monitorable, Runnable {
   private static final Logger LOG = LoggerFactory.getLogger(ImageDocumentExtractor.class);
   private final SourceFileProcessor documentProcessor;
   private MultiTaskProgressMonitor currentMonitor;
-  private final File imageFile;
+  private final BufferedImage image;
+  private final String fileName;
   private int pageNumber = 1;
 
-  public ImageDocumentExtractor(File imageFile, SourceFileProcessor documentProcessor) {
+  public ImageDocumentExtractor(BufferedImage image, String fileName, SourceFileProcessor documentProcessor) {
     this.documentProcessor = documentProcessor;
-    this.imageFile = imageFile;
+    this.image = image;
+    this.fileName = fileName;
   }
 
   @Override
@@ -56,46 +54,31 @@ public void run() {
   }
 
   public JochreDocument extractDocument() {
-    LOG.debug("ImageDocumentExtractorImpl.extractDocument");
+    LOG.debug("InputStreamDocumentExtractor.extractDocument");
     try {
-      File[] files = new File[1];
-
-      if (imageFile.isDirectory()) {
-        files = imageFile.listFiles(new FilenameFilter() {
-
-          @Override
-          public boolean accept(File dir, String name) {
-            return (name.toLowerCase().endsWith(".png") || name.toLowerCase().endsWith(".jpg") || name.toLowerCase().endsWith(".jpeg")
-                || name.toLowerCase().endsWith(".gif") || name.toLowerCase().endsWith(".tif") || name.toLowerCase().endsWith(".tiff"));
-          }
-        });
-      } else {
-        files[0] = imageFile;
-      }
+
 
       JochreDocument doc = this.documentProcessor.onDocumentStart();
-      doc.setTotalPageCount(files.length);
+      doc.setTotalPageCount(1);
 
       int currentPageNumber = this.pageNumber;
-      for (File file : files) {
-        JochrePage page = this.documentProcessor.onPageStart(currentPageNumber++);
 
-        BufferedImage image = ImageIO.read(file);
-        String imageName = file.getName();
+      JochrePage page = this.documentProcessor.onPageStart(currentPageNumber++);
 
-        if (currentMonitor != null && documentProcessor instanceof Monitorable) {
-          ProgressMonitor monitor = ((Monitorable) documentProcessor).monitorTask();
-          double percentAllotted = (1 / (double) (files.length));
-          currentMonitor.startTask(monitor, percentAllotted);
-        }
+      String imageName = this.fileName;
 
-        documentProcessor.onImageFound(page, image, imageName, 0);
-        if (currentMonitor != null && documentProcessor instanceof Monitorable) {
-          currentMonitor.endTask();
-        }
+      if (currentMonitor != null && documentProcessor instanceof Monitorable) {
+        ProgressMonitor monitor = ((Monitorable) documentProcessor).monitorTask();
+        currentMonitor.startTask(monitor, 1.0);
+      }
 
-        this.documentProcessor.onPageComplete(page);
+      documentProcessor.onImageFound(page, image, imageName, 0);
+      if (currentMonitor != null && documentProcessor instanceof Monitorable) {
+        currentMonitor.endTask();
       }
+
+      this.documentProcessor.onPageComplete(page);
+
       this.documentProcessor.onDocumentComplete(doc);
       this.documentProcessor.onAnalysisComplete();
 
@@ -109,7 +92,7 @@ public boolean accept(File dir, String name) {
       LOG.error("Exception while processing document", e);
       throw new RuntimeException(e);
     } finally {
-      LOG.debug("Exit ImageDocumentExtractorImpl.extractDocument");
+      LOG.debug("Exit InputStreamDocumentExtractor.extractDocument");
     }
   }
 
diff --git a/jochre_core/src/main/java/com/joliciel/jochre/doc/InputStreamDocumentExtractor.java b/jochre_core/src/main/java/com/joliciel/jochre/doc/ImageFileDocumentExtractor.java
similarity index 57%
rename from jochre_core/src/main/java/com/joliciel/jochre/doc/InputStreamDocumentExtractor.java
rename to jochre_core/src/main/java/com/joliciel/jochre/doc/ImageFileDocumentExtractor.java
index 0c94bb5..b78e7e5 100644
--- a/jochre_core/src/main/java/com/joliciel/jochre/doc/InputStreamDocumentExtractor.java
+++ b/jochre_core/src/main/java/com/joliciel/jochre/doc/ImageFileDocumentExtractor.java
@@ -18,36 +18,36 @@
 //////////////////////////////////////////////////////////////////////////////
 package com.joliciel.jochre.doc;
 
-import com.joliciel.talismane.utils.Monitorable;
-import com.joliciel.talismane.utils.MultiTaskProgressMonitor;
-import com.joliciel.talismane.utils.ProgressMonitor;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import javax.imageio.ImageIO;
 import java.awt.image.BufferedImage;
 import java.io.File;
 import java.io.FilenameFilter;
-import java.io.InputStream;
+
+import javax.imageio.ImageIO;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.joliciel.talismane.utils.Monitorable;
+import com.joliciel.talismane.utils.MultiTaskProgressMonitor;
+import com.joliciel.talismane.utils.ProgressMonitor;
 
 /**
- * An interface for extracting a JochreDocument from an image input stream.
+ * An interface for extracting a JochreDocument from an image File (jpeg, gif or
+ * png).
  * 
  * @author Assaf Urieli
  *
  */
-public class InputStreamDocumentExtractor implements Monitorable, Runnable {
-  private static final Logger LOG = LoggerFactory.getLogger(InputStreamDocumentExtractor.class);
+public class ImageFileDocumentExtractor implements Monitorable, Runnable {
+  private static final Logger LOG = LoggerFactory.getLogger(ImageFileDocumentExtractor.class);
   private final SourceFileProcessor documentProcessor;
   private MultiTaskProgressMonitor currentMonitor;
-  private final InputStream imageInputStream;
-  private final String fileName;
+  private final File imageFile;
   private int pageNumber = 1;
 
-  public InputStreamDocumentExtractor(InputStream imageInputStream, String fileName, SourceFileProcessor documentProcessor) {
+  public ImageFileDocumentExtractor(File imageFile, SourceFileProcessor documentProcessor) {
     this.documentProcessor = documentProcessor;
-    this.imageInputStream = imageInputStream;
-    this.fileName = fileName;
+    this.imageFile = imageFile;
   }
 
   @Override
@@ -56,32 +56,46 @@ public void run() {
   }
 
   public JochreDocument extractDocument() {
-    LOG.debug("InputStreamDocumentExtractor.extractDocument");
+    LOG.debug("ImageDocumentExtractorImpl.extractDocument");
     try {
-
+      File[] files = new File[1];
+
+      if (imageFile.isDirectory()) {
+        files = imageFile.listFiles(new FilenameFilter() {
+
+          @Override
+          public boolean accept(File dir, String name) {
+            return (name.toLowerCase().endsWith(".png") || name.toLowerCase().endsWith(".jpg") || name.toLowerCase().endsWith(".jpeg")
+                || name.toLowerCase().endsWith(".gif") || name.toLowerCase().endsWith(".tif") || name.toLowerCase().endsWith(".tiff"));
+          }
+        });
+      } else {
+        files[0] = imageFile;
+      }
 
       JochreDocument doc = this.documentProcessor.onDocumentStart();
-      doc.setTotalPageCount(1);
+      doc.setTotalPageCount(files.length);
 
       int currentPageNumber = this.pageNumber;
+      for (File file : files) {
+        JochrePage page = this.documentProcessor.onPageStart(currentPageNumber++);
 
-      JochrePage page = this.documentProcessor.onPageStart(currentPageNumber++);
+        BufferedImage image = ImageIO.read(file);
+        String imageName = file.getName();
 
-      BufferedImage image = ImageIO.read(this.imageInputStream);
-      String imageName = this.fileName;
+        if (currentMonitor != null && documentProcessor instanceof Monitorable) {
+          ProgressMonitor monitor = ((Monitorable) documentProcessor).monitorTask();
+          double percentAllotted = (1 / (double) (files.length));
+          currentMonitor.startTask(monitor, percentAllotted);
+        }
 
-      if (currentMonitor != null && documentProcessor instanceof Monitorable) {
-        ProgressMonitor monitor = ((Monitorable) documentProcessor).monitorTask();
-        currentMonitor.startTask(monitor, 1.0);
-      }
+        documentProcessor.onImageFound(page, image, imageName, 0);
+        if (currentMonitor != null && documentProcessor instanceof Monitorable) {
+          currentMonitor.endTask();
+        }
 
-      documentProcessor.onImageFound(page, image, imageName, 0);
-      if (currentMonitor != null && documentProcessor instanceof Monitorable) {
-        currentMonitor.endTask();
+        this.documentProcessor.onPageComplete(page);
       }
-
-      this.documentProcessor.onPageComplete(page);
-
       this.documentProcessor.onDocumentComplete(doc);
       this.documentProcessor.onAnalysisComplete();
 
@@ -95,7 +109,7 @@ public JochreDocument extractDocument() {
       LOG.error("Exception while processing document", e);
       throw new RuntimeException(e);
     } finally {
-      LOG.debug("Exit InputStreamDocumentExtractor.extractDocument");
+      LOG.debug("Exit ImageDocumentExtractorImpl.extractDocument");
     }
   }
 
diff --git a/jochre_distribution/pom.xml b/jochre_distribution/pom.xml
index 45305d3..de56164 100644
--- a/jochre_distribution/pom.xml
+++ b/jochre_distribution/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.joliciel.jochre</groupId>
     <artifactId>jochre-parent</artifactId>
-    <version>2.6.2</version>
+    <version>2.6.3-SNAPSHOT</version>
     <relativePath>../jochre_parent</relativePath>
   </parent>
   <build>
diff --git a/jochre_parent/pom.xml b/jochre_parent/pom.xml
index e829b6f..3168583 100644
--- a/jochre_parent/pom.xml
+++ b/jochre_parent/pom.xml
@@ -4,7 +4,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.joliciel.jochre</groupId>
   <artifactId>jochre-parent</artifactId>
-  <version>2.6.2</version>
+  <version>2.6.3-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>Jochre</name>
   <description>Java Optical CHaracter Recognition</description>
diff --git a/jochre_search/pom.xml b/jochre_search/pom.xml
index 5bc08eb..fc72512 100644
--- a/jochre_search/pom.xml
+++ b/jochre_search/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.joliciel.jochre</groupId>
     <artifactId>jochre-parent</artifactId>
-    <version>2.6.2</version>
+    <version>2.6.3-SNAPSHOT</version>
     <relativePath>../jochre_parent</relativePath>
   </parent>
   <packaging>jar</packaging>
diff --git a/jochre_search_webapp/pom.xml b/jochre_search_webapp/pom.xml
index b1ef207..51920ef 100644
--- a/jochre_search_webapp/pom.xml
+++ b/jochre_search_webapp/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.joliciel.jochre</groupId>
     <artifactId>jochre-parent</artifactId>
-    <version>2.6.2</version>
+    <version>2.6.3-SNAPSHOT</version>
     <relativePath>../jochre_parent</relativePath>
   </parent>
   <packaging>war</packaging>
diff --git a/jochre_utils/pom.xml b/jochre_utils/pom.xml
index f15f201..7372d06 100644
--- a/jochre_utils/pom.xml
+++ b/jochre_utils/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.joliciel.jochre</groupId>
     <artifactId>jochre-parent</artifactId>
-    <version>2.6.2</version>
+    <version>2.6.3-SNAPSHOT</version>
     <relativePath>../jochre_parent</relativePath>
   </parent>
   <build>
diff --git a/jochre_utils/src/main/java/com/joliciel/jochre/utils/graphics/ImageUtils.java b/jochre_utils/src/main/java/com/joliciel/jochre/utils/graphics/ImageUtils.java
index c5034fc..60a388b 100644
--- a/jochre_utils/src/main/java/com/joliciel/jochre/utils/graphics/ImageUtils.java
+++ b/jochre_utils/src/main/java/com/joliciel/jochre/utils/graphics/ImageUtils.java
@@ -82,7 +82,7 @@ public static BufferedImage toBlackAndWhite(BufferedImage greyImage, int thresho
   public static BufferedImage deepCopy(BufferedImage bi) {
     ColorModel cm = bi.getColorModel();
     boolean isAlphaPremultiplied = cm.isAlphaPremultiplied();
-    WritableRaster raster = bi.copyData(null);
+    WritableRaster raster = bi.copyData(bi.getRaster().createCompatibleWritableRaster());
     return new BufferedImage(cm, raster, isAlphaPremultiplied, null);
   }
   
diff --git a/jochre_web/pom.xml b/jochre_web/pom.xml
index 7e62190..a624f51 100644
--- a/jochre_web/pom.xml
+++ b/jochre_web/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.joliciel.jochre</groupId>
     <artifactId>jochre-parent</artifactId>
-    <version>2.6.2</version>
+    <version>2.6.3-SNAPSHOT</version>
     <relativePath>../jochre_parent</relativePath>
   </parent>
   <packaging>war</packaging>
diff --git a/jochre_web/src/main/java/com/joliciel/jochre/web/TextController.java b/jochre_web/src/main/java/com/joliciel/jochre/web/TextController.java
index e9916d9..af1b7e6 100644
--- a/jochre_web/src/main/java/com/joliciel/jochre/web/TextController.java
+++ b/jochre_web/src/main/java/com/joliciel/jochre/web/TextController.java
@@ -45,7 +45,7 @@
 import com.joliciel.jochre.JochreSession;
 import com.joliciel.jochre.doc.DocumentDao;
 import com.joliciel.jochre.doc.DocumentObserver;
-import com.joliciel.jochre.doc.ImageDocumentExtractor;
+import com.joliciel.jochre.doc.ImageFileDocumentExtractor;
 import com.joliciel.jochre.doc.JochreDocument;
 import com.joliciel.jochre.doc.JochreDocumentGenerator;
 import com.joliciel.jochre.doc.JochrePage;
@@ -306,7 +306,7 @@ public void doAfterCompose(Window window) throws Exception {
           progressTimer.setRunning(true);
         } else if (lowerCaseFileName.endsWith(".png") || lowerCaseFileName.endsWith(".jpg")
             || lowerCaseFileName.endsWith(".jpeg") || lowerCaseFileName.endsWith(".gif")) {
-          ImageDocumentExtractor extractor = new ImageDocumentExtractor(currentFile, documentGenerator);
+          ImageFileDocumentExtractor extractor = new ImageFileDocumentExtractor(currentFile, documentGenerator);
           if (startPage >= 0)
             extractor.setPageNumber(startPage);
           this.progressMonitor = extractor.monitorTask();
diff --git a/jochre_yiddish/pom.xml b/jochre_yiddish/pom.xml
index 635cc91..0f53af8 100644
--- a/jochre_yiddish/pom.xml
+++ b/jochre_yiddish/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.joliciel.jochre</groupId>
     <artifactId>jochre-parent</artifactId>
-    <version>2.6.2</version>
+    <version>2.6.3-SNAPSHOT</version>
     <relativePath>../jochre_parent</relativePath>
   </parent>
   <packaging>jar</packaging>