update bio-formats version to 7.3.0.

.vscode/extensions.json

@@ -0,0 +1,9 @@
+{
+    "recommendations": [
+        "esbenp.prettier-vscode",
+        "mosapride.zenkaku",
+        "redhat.fabric8-analytics",
+        "streetsidesoftware.code-spell-checker",
+        "vscjava.vscode-java-pack"
+    ]
+}

.vscode/settings.json

@@ -0,0 +1,18 @@
+{
+    "editor.formatOnSave": true,
+    "editor.codeActionsOnSave": {
+        "source.organizeImports": "explicit"
+    },
+    "[jsonc]": {
+        "editor.defaultFormatter": "esbenp.prettier-vscode"
+    },
+    // Extensions - Code Spell Checker
+    "cSpell.ignoreWords": ["endianness", "noflat", "nopix", "omexml"],
+    "cSpell.words": ["bioformats", "imageinfo", "neurodata", "riken"],
+    // Extentions - Prettier
+    "prettier.printWidth": 120,
+    "prettier.singleQuote": true,
+    "prettier.tabWidth": 4,
+    "java.configuration.updateBuildConfiguration": "interactive",
+    "java.compile.nullAnalysis.mode": "automatic"
+}

README.md

@@ -1,39 +1,48 @@
 # BioFormatsImageInfo
+
 Metadata extraction tool based on Bio-Formats
 
-### make package
+## make package
+
 ```shell
 mvn package
 ```
 
-### run
+## run
+
 ```shell
 ./target/dist/bin/bioformats-imageinfo "[path to image file]"
 ```
 
 ### run by jar
+
 ```shell
-java -jar ./target/dist/lib/bioformats-imageinfo-1.0.0.jar "[path to image file]"
+java -jar ./target/dist/lib/bioformats-imageinfo-1.2.3.jar "[path to image file]"
 ```
 
 ### run by fat jar
+
 ```shell
-java -jar ./target/bioformats-imageinfo-1.0.0-jar-with-dependencies.jar "[path to image file]"
+java -jar ./target/bioformats-imageinfo-1.2.3-jar-with-dependencies.jar "[path to image file]"
 ```
 
-### library usage
+## library usage
+
 ```java
 import java.util.LinkedHashMap;
 import java.util.Map;
 import jp.riken.neurodata.tools.BioFormatsImageInfo;
-import jp.riken.neurodata.tools.BioFormatsException;
+import jp.riken.neurodata.tools.BioFormatsImageException;
+import jp.riken.neurodata.tools.BioFormatsImageThumbnail;
 
 String path = "[path to image file]";
 String format = "";
 Map<String, Object> metadata = new LinkedHashMap<String, Object>();
+Map<String, Object> thumbnail = new LinkedHashMap<String, Object>();
 
 try {
   format = BioFormatsImageInfo.readMetadata(path, metadata);
+  BioFormatsImageThumbnail.readThumbnail(path, thumbnail);
 } catch (BioFormatsImageException e) {
   // error occurred
   e.printStackTrace();

pom.xml

@@ -1,17 +1,17 @@
 <?xml version="1.0" encoding="UTF-8"?>
-
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <groupId>jp.riken.neurodata.tools.BioFormatsImageInfo</groupId>
   <artifactId>bioformats-imageinfo</artifactId>
-  <version>1.0.0</version>
+  <version>1.2.3</version>
 
   <name>bioformats-imageinfo</name>
   <url>https://neurodata.riken.jp</url>
 
   <properties>
-    <bio-formats.version>6.10.0</bio-formats.version>
+    <bio-formats.version>7.3.0</bio-formats.version>
     <bioformats-imageinfo.mainClass>jp.riken.neurodata.tools.BioFormatsImageInfo</bioformats-imageinfo.mainClass>
 
     <maven.compiler.source>1.8</maven.compiler.source>
@@ -27,14 +27,39 @@
       <artifactId>bio-formats-tools</artifactId>
       <version>${bio-formats.version}</version>
     </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-nop</artifactId>
+      <version>2.0.9</version>
+    </dependency>
   </dependencies>
 
   <build>
     <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-enforcer-plugin</artifactId>
+        <version>3.5.0</version>
+        <executions>
+          <execution>
+            <id>enforce-maven</id>
+            <goals>
+              <goal>enforce</goal>
+            </goals>
+            <configuration>
+              <rules>
+                <requireMavenVersion>
+                  <version>3.2.5</version>
+                </requireMavenVersion>
+              </rules>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-dependency-plugin</artifactId>
-        <version>3.3.0</version>
+        <version>3.6.1</version>
         <executions>
           <execution>
             <id>copy-dependencies</id>
@@ -51,7 +76,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-jar-plugin</artifactId>
-        <version>3.2.2</version>
+        <version>3.4.1</version>
         <configuration>
           <archive>
             <manifest>
@@ -61,34 +86,10 @@
           </archive>
         </configuration>
       </plugin>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-assembly-plugin</artifactId>
-	<version>3.4.1</version>
-        <configuration>
-          <descriptorRefs>
-            <descriptorRef>jar-with-dependencies</descriptorRef>
-          </descriptorRefs>
-          <archive>
-            <manifest>
-	      <mainClass>${bioformats-imageinfo.mainClass}</mainClass>
-            </manifest>
-          </archive>
-        </configuration>
-        <executions>
-          <execution>
-            <id>make-assembly</id>
-            <phase>package</phase>
-            <goals>
-              <goal>single</goal>
-            </goals>
-          </execution>
-        </executions>
-      </plugin>
       <plugin>
         <groupId>org.codehaus.mojo</groupId>
         <artifactId>appassembler-maven-plugin</artifactId>
-        <version>1.10</version>
+        <version>2.1.0</version>
         <configuration>
           <assembleDirectory>${project.build.directory}/dist</assembleDirectory>
           <repositoryLayout>flat</repositoryLayout>
@@ -109,10 +110,37 @@
           </execution>
         </executions>
       </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-assembly-plugin</artifactId>
+        <version>3.7.1</version>
+        <configuration>
+          <descriptorRefs>
+            <descriptorRef>jar-with-dependencies</descriptorRef>
+          </descriptorRefs>
+          <archive>
+            <manifest>
+              <mainClass>${bioformats-imageinfo.mainClass}</mainClass>
+            </manifest>
+          </archive>
+          <descriptors>
+            <descriptor>src/main/assembly/assembly.xml</descriptor>
+          </descriptors>
+        </configuration>
+        <executions>
+          <execution>
+            <id>make-assembly</id>
+            <phase>package</phase>
+            <goals>
+              <goal>single</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
       <plugin>
         <groupId>org.owasp</groupId>
         <artifactId>dependency-check-maven</artifactId>
-        <version>7.1.1</version>
+        <version>9.0.9</version>
         <executions>
           <execution>
             <goals>
@@ -128,15 +156,18 @@
     <pluginRepository>
       <id>central</id>
       <name>Central Repository</name>
-      <url>https://repo.maven.apache.org/maven2</url>
+      <!-- <url>https://repo.maven.apache.org/maven2</url> -->
+      <url>https://repo1.maven.org/maven2/</url>
       <layout>default</layout>
     </pluginRepository>
   </pluginRepositories>
+
   <repositories>
     <repository>
       <id>central</id>
       <name>Central Repository</name>
-      <url>https://repo.maven.apache.org/maven2</url>
+      <!-- <url>https://repo.maven.apache.org/maven2</url> -->
+      <url>https://repo1.maven.org/maven2/</url>
     </repository>
     <repository>
       <id>ome</id>

src/main/assembly/assembly.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<assembly xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2 http://maven.apache.org/xsd/assembly-1.1.2.xsd">
+  <id>bin</id>
+  <formats>
+    <format>tar.gz</format>
+    <format>tar.bz2</format>
+    <format>zip</format>
+  </formats>
+  <fileSets>
+    <fileSet>
+      <directory>target/dist/bin</directory>
+      <outputDirectory>bin</outputDirectory>
+      <excludes>
+        <exclude>*.bat</exclude>
+      </excludes>
+      <directoryMode>0755</directoryMode>
+      <fileMode>0755</fileMode>
+    </fileSet>
+    <fileSet>
+      <directory>target/dist/bin</directory>
+      <outputDirectory>bin</outputDirectory>
+      <includes>
+        <include>*.bat</include>
+      </includes>
+      <directoryMode>0755</directoryMode>
+      <fileMode>0644</fileMode>
+    </fileSet>
+  </fileSets>
+  <dependencySets>
+    <dependencySet>
+      <outputDirectory>lib</outputDirectory>
+    </dependencySet>
+  </dependencySets>
+</assembly>

src/main/java/jp/riken/neurodata/tools/BioFormatsImageInfo.java

@@ -24,29 +24,29 @@ import loci.formats.tools.ImageInfo;
 
 public class BioFormatsImageInfo {
 
-  protected static Map<String, Object> readImages(IFormatReader reader) throws FormatException, IOException {
-    Map<String, Object> metadata = new LinkedHashMap<String, Object>();
+    protected static Map<String, Object> readImages(final IFormatReader reader) throws FormatException, IOException {
+        final Map<String, Object> metadata = new LinkedHashMap<String, Object>();
 
         // read basic metadata
-    int seriesCount = reader.getSeriesCount();
-    MetadataStore ms = reader.getMetadataStore();
-    MetadataRetrieve mr = ms instanceof MetadataRetrieve ? (MetadataRetrieve) ms : null;
+        final int seriesCount = reader.getSeriesCount();
+        final MetadataStore ms = reader.getMetadataStore();
+        final MetadataRetrieve mr = ms instanceof MetadataRetrieve ? (MetadataRetrieve) ms : null;
         for (int j = 0; j < seriesCount; j++) {
 
             // read basic metadata for series #j
             reader.setSeries(j);
-      Map<String, Object> seriesMetadata = new LinkedHashMap<String, Object>();
+            final Map<String, Object> seriesMetadata = new LinkedHashMap<String, Object>();
 
-      int imageCount = reader.getImageCount();
-      int resolutionCount = reader.getResolutionCount();
-      String seriesName = mr == null ? null : mr.getImageName(j);
+            final int imageCount = reader.getImageCount();
+            final int resolutionCount = reader.getResolutionCount();
+            final String seriesName = mr == null ? null : mr.getImageName(j);
             if (seriesName != null) {
                 seriesMetadata.put("name", seriesName);
             }
 
             // resolutions
             if (resolutionCount > 1) {
-        Map<String, Object> resolutionsMetadata = new LinkedHashMap<String, Object>();
+                final Map<String, Object> resolutionsMetadata = new LinkedHashMap<String, Object>();
                 for (int i = 0; i < resolutionCount; i++) {
                     reader.setResolution(i);
                     resolutionsMetadata.put(String.format("resolution[%d]", i),
@@ -62,15 +62,16 @@ public class BioFormatsImageInfo {
 
             // indexed
             {
-        List<Object> indexed = new ArrayList<Object>();
+                final List<Object> indexed = new ArrayList<Object>();
                 indexed.add(reader.isIndexed());
                 indexed.add(String.format("%b color", !reader.isFalseColor()));
-        byte[][] table8 = reader.get8BitLookupTable();
+                final byte[][] table8 = reader.get8BitLookupTable();
                 if (table8 != null) {
                     indexed.add(
-              String.format("8-bit LUT: %d x %s", table8.length, table8[0] == null ? "null" : "" + table8[0].length));
+                            String.format("8-bit LUT: %d x %s", table8.length,
+                                    table8[0] == null ? "null" : "" + table8[0].length));
                 }
-        short[][] table16 = reader.get16BitLookupTable();
+                final short[][] table16 = reader.get16BitLookupTable();
                 if (table16 != null) {
                     indexed.add(String.format("16-bit LUT: %d x %s", table16.length,
                             table16[0] == null ? "null" : "" + table16[0].length));
@@ -80,10 +81,11 @@ public class BioFormatsImageInfo {
 
             seriesMetadata.put("sizeX", reader.getSizeX());
             seriesMetadata.put("sizeY", reader.getSizeY());
-      int sizeZ = reader.getSizeZ();
+            final int sizeZ = reader.getSizeZ();
             seriesMetadata.put("sizeZ", makeDimension(sizeZ, sizeZ, reader.getModuloZ()));
-      seriesMetadata.put("sizeC", makeDimension(reader.getSizeC(), reader.getEffectiveSizeC(), reader.getModuloC()));
-      int sizeT = reader.getSizeT();
+            seriesMetadata.put("sizeC",
+                    makeDimension(reader.getSizeC(), reader.getEffectiveSizeC(), reader.getModuloC()));
+            final int sizeT = reader.getSizeT();
             seriesMetadata.put("sizeT", makeDimension(sizeT, sizeT, reader.getModuloT()));
             seriesMetadata.put("tileSize", makeRectangle(reader.getOptimalTileWidth(), reader.getOptimalTileHeight()));
             seriesMetadata.put("thumbnailSize", makeRectangle(reader.getThumbSizeX(), reader.getThumbSizeY()));
@@ -97,7 +99,7 @@ public class BioFormatsImageInfo {
 
             // plane
             {
-        int[] indices;
+                final int[] indices;
                 if (imageCount > 6) {
                     int q = imageCount / 2;
                     indices = new int[] { 0, q - 2, q - 1, q, q + 1, q + 2, imageCount - 1 };
@@ -108,12 +110,12 @@ public class BioFormatsImageInfo {
                 } else {
                     indices = new int[] { 0 };
                 }
-        int[][] zct = new int[indices.length][];
-        int[] indices2 = new int[indices.length];
+                final int[][] zct = new int[indices.length][];
+                final int[] indices2 = new int[indices.length];
                 for (int i = 0; i < indices.length; i++) {
                     zct[i] = reader.getZCTCoords(indices[i]);
                     indices2[i] = reader.getIndex(zct[i][0], zct[i][1], zct[i][2]);
-          Map<String, Object> planeMetadata = new LinkedHashMap<String, Object>();
+                    final Map<String, Object> planeMetadata = new LinkedHashMap<String, Object>();
                     planeMetadata.put("Z", zct[i][0]);
                     planeMetadata.put("C", zct[i][1]);
                     planeMetadata.put("T", zct[i][2]);
@@ -129,37 +131,37 @@ public class BioFormatsImageInfo {
         return metadata;
     }
 
-  protected static Map<String, Object> readAnnotations(IFormatReader reader) {
-    Map<String, Object> metadata = new LinkedHashMap<String, Object>();
+    protected static Map<String, Object> readAnnotations(final IFormatReader reader) {
+        final Map<String, Object> metadata = new LinkedHashMap<String, Object>();
         // global metadata
-    Hashtable<String, Object> globalMetadata = reader.getGlobalMetadata();
+        final Hashtable<String, Object> globalMetadata = reader.getGlobalMetadata();
         for (String key : MetadataTools.keys(globalMetadata)) {
             metadata.put(key, globalMetadata.get(key));
         }
         // original metadata
-    int seriesCount = reader.getSeriesCount();
+        final int seriesCount = reader.getSeriesCount();
         for (int j = 0; j < seriesCount; j++) {
             reader.setSeries(j);
-      Hashtable<String, Object> seriesMagedata = reader.getSeriesMetadata();
-      if (!seriesMagedata.isEmpty()) {
-        Map<String, Object> seriesMetadata = new LinkedHashMap<String, Object>();
-        String[] keys = MetadataTools.keys(seriesMagedata);
+            final Hashtable<String, Object> seriesMetadata = reader.getSeriesMetadata();
+            if (!seriesMetadata.isEmpty()) {
+                final Map<String, Object> originalMetadata = new LinkedHashMap<String, Object>();
+                final String[] keys = MetadataTools.keys(seriesMetadata);
                 for (int i = 0; i < keys.length; i++) {
-          seriesMetadata.put(keys[i], seriesMagedata.get(keys[i]));
+                    originalMetadata.put(keys[i], seriesMetadata.get(keys[i]));
                 }
-        metadata.put(String.format("series[%d]", j), seriesMetadata);
+                metadata.put(String.format("series[%d]", j), originalMetadata);
             }
         }
 
         return metadata;
     }
 
-  protected static Object makeDimension(int size, int effSize, Modulo modulo) {
-    int mLength = modulo.length();
+    protected static Object makeDimension(final int size, final int effSize, final Modulo modulo) {
+        final int mLength = modulo.length();
         if (size == effSize && mLength == 1) {
             return size;
         }
-    List<Object> ret = new ArrayList<Object>();
+        final List<Object> ret = new ArrayList<Object>();
         ret.add(size);
         if (size != effSize) {
             ret.add(String.format("(effectively %d)", effSize));
@@ -171,35 +173,37 @@ public class BioFormatsImageInfo {
         return ret;
     }
 
-  protected static Map<String, Object> makeRectangle(int width, int height) {
-    Map<String, Object> ret = new LinkedHashMap<String, Object>();
+    protected static Map<String, Object> makeRectangle(final int width, final int height) {
+        final Map<String, Object> ret = new LinkedHashMap<String, Object>();
         ret.put("width", width);
         ret.put("height", height);
+
         return ret;
     }
 
-  protected static String getJsonString(Map<String, Object> map) {
-    ObjectMapper mapper = new ObjectMapper();
+    protected static String getJsonString(final Map<String, Object> map) {
+        final ObjectMapper mapper = new ObjectMapper();
         String json = null;
         try {
             // json = mapper.writerWithDefaultPrettyPrinter().writeValueAsString(map);
             json = mapper.writeValueAsString(map);
-    } catch (Exception e) {
-      // return "null" if conversion error occured
+        } catch (final Throwable e) {
+            // return "null" if conversion error occurred
             json = "null";
         }
 
         return json;
     }
 
-  public static String readMetadata(String path, Map<String, Object> metadata) throws BioFormatsImageException {
+    public static String readMetadata(final String path, final Map<String, Object> metadata)
+            throws BioFormatsImageException {
         if (FilenameUtils.getExtension(path).toLowerCase().equals("zip")) {
             // ignore if file is zip archive
             throw new BioFormatsImageException("Zip is not supported");
         }
         String format = "";
-    ImageInfo info = new ImageInfo();
-    IFormatReader reader = new ImageReader();
+        final ImageInfo info = new ImageInfo();
+        final IFormatReader reader = new ImageReader();
         try {
             // info.parseArgs(new String[] { path, "-nopix", "-noflat", "-omexml" });
             info.parseArgs(new String[] { path, "-nopix", "-noflat" });
@@ -220,17 +224,17 @@ public class BioFormatsImageInfo {
             reader.setResolution(0);
             // info.printGlobalMetadata();
             // info.printOriginalMetadata();
-      Map<String, Object> annotations = readAnnotations(reader);
+            final Map<String, Object> annotations = readAnnotations(reader);
             if (!annotations.isEmpty()) {
                 metadata.put("annotations", annotations);
             }
-    } catch (Exception e) {
+        } catch (final Throwable e) {
             throw new BioFormatsImageException(e);
         } finally {
             if (reader != null) {
                 try {
                     reader.close();
-        } catch (IOException e) {
+                } catch (final IOException e) {
                     throw new BioFormatsImageException(e);
                 }
             }
@@ -240,30 +244,35 @@ public class BioFormatsImageInfo {
     }
 
     // -- Main method --
-  public static void main(String[] args) {
+    public static void main(final String[] args) {
         boolean status = true;
         String message = "";
         String format = "";
-    Map<String, Object> metadata = new LinkedHashMap<String, Object>();
+        final Map<String, Object> metadata = new LinkedHashMap<String, Object>();
+        final Map<String, Object> thumbnail = new LinkedHashMap<String, Object>();
         if (args.length != 1) {
             status = false;
             message = "filename argument required";
         } else {
+            final String path = args[0];
             try {
-        DebugTools.enableLogging("ERROR");
-        format = readMetadata(args[0], metadata);
-      } catch (BioFormatsImageException e) {
+                DebugTools.enableLogging("OFF");
+                format = readMetadata(path, metadata);
+                BioFormatsImageThumbnail.readThumbnail(path, thumbnail);
+            } catch (Throwable t) {
                 status = false;
+                message = t.getMessage();
                 metadata.clear();
-        message = e.getMessage();
+                thumbnail.clear();
             }
         }
 
-    Map<String, Object> results = new LinkedHashMap<String, Object>();
+        final Map<String, Object> results = new LinkedHashMap<String, Object>();
         results.put("status", status);
         results.put("message", message);
         results.put("format", format);
         results.put("metadata", metadata.isEmpty() ? null : metadata);
+        results.put("thumbnail", thumbnail.isEmpty() ? null : thumbnail);
         System.out.println(getJsonString(results));
 
         if (!status) {

src/main/java/jp/riken/neurodata/tools/BioFormatsImageThumbnail.java

@@ -0,0 +1,274 @@
+package jp.riken.neurodata.tools;
+
+import java.awt.Color;
+import java.awt.Graphics2D;
+import java.awt.Image;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.Base64;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import javax.imageio.IIOImage;
+import javax.imageio.ImageIO;
+import javax.imageio.ImageWriteParam;
+import javax.imageio.ImageWriter;
+import javax.imageio.stream.ImageOutputStream;
+
+import loci.common.DebugTools;
+import loci.formats.FormatException;
+import loci.formats.ImageReader;
+import loci.formats.gui.AWTImageTools;
+import loci.formats.gui.BufferedImageReader;
+
+public class BioFormatsImageThumbnail {
+
+    protected static final float JPEG_QUALITY = 0.85f;
+    protected static final int BACKGROUND_COLOR = 0x000000;
+    protected static final double MAXIMUM_SCALE = 2.0;
+
+    public static BufferedImage resize(final BufferedImage image, final int width, final int height) {
+        final boolean hasAlpha = image.getColorModel().hasAlpha();
+        final int imageWidth = image.getWidth();
+        final int imageHeight = image.getHeight();
+        final double scaleWidth = (double) width / (double) imageWidth;
+        final double scaleHeight = (double) height / (double) imageHeight;
+        double scale = Math.min(scaleWidth, scaleHeight);
+        if (scale > MAXIMUM_SCALE) {
+            // limit scaling size to maximum scale
+            scale = MAXIMUM_SCALE;
+        }
+        int resizeWidth = imageWidth;
+        int resizeHeight = imageHeight;
+        Image resizeImage = image;
+        if (scale != 1.0) {
+            // resize image if dimension is different with requested dimension.
+            resizeWidth = (int) (scale * (double) imageWidth);
+            resizeHeight = (int) (scale * (double) imageHeight);
+            resizeImage = image.getScaledInstance(resizeWidth, resizeHeight, Image.SCALE_AREA_AVERAGING);
+        }
+        final int type = hasAlpha ? BufferedImage.TYPE_INT_ARGB : BufferedImage.TYPE_INT_RGB;
+        final BufferedImage ret = new BufferedImage(width, height, type);
+        final Graphics2D g = ret.createGraphics();
+        final Color c = new Color(image.getRGB(0, 0), hasAlpha);
+        final int offsetX = (width - resizeWidth) / 2;
+        final int offsetY = (height - resizeHeight) / 2;
+        // System.out.println("original:" + imageWidth + "," + imageHeight);
+        // System.out.println("resize:" + resizeWidth + "," + resizeHeight);
+        // System.out.println("target:" + width + "," + height);
+        // System.out.println("offset:" + offsetX + "," + offsetY);
+        g.setColor(c);
+        g.fillRect(0, 0, width, height);
+        g.drawImage(resizeImage, offsetX, offsetY, resizeWidth, resizeHeight, null);
+        g.dispose();
+
+        return ret;
+    }
+
+    protected static BufferedImage removeAlphaChannel(final BufferedImage image, final int matColor) {
+        if (!image.getColorModel().hasAlpha()) {
+            return image;
+        }
+        final BufferedImage ret = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_INT_RGB);
+        final Graphics2D g = ret.createGraphics();
+        g.setColor(new Color(matColor, false));
+        g.fillRect(0, 0, image.getWidth(), image.getHeight());
+        g.drawImage(image, 0, 0, null);
+        g.dispose();
+
+        return ret;
+    }
+
+    protected static byte[] getJpegByteArray(final BufferedImage image, final float quality, final int matColor)
+            throws BioFormatsImageException {
+        byte[] ret = null;
+        try (final ByteArrayOutputStream bos = new ByteArrayOutputStream();
+                final ImageOutputStream ios = ImageIO.createImageOutputStream(bos);) {
+            final ImageWriter writer = ImageIO.getImageWritersByFormatName("jpeg").next();
+            final ImageWriteParam param = writer.getDefaultWriteParam();
+            if (param.canWriteCompressed()) {
+                param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
+                param.setCompressionQuality(quality);
+            }
+            writer.setOutput(ios);
+            writer.write(null, new IIOImage(removeAlphaChannel(image, matColor), null, null), param);
+            writer.dispose();
+            ret = bos.toByteArray();
+        } catch (final IOException e) {
+            throw new BioFormatsImageException(e);
+        }
+
+        return ret;
+    }
+
+    protected static byte[] getPngByteArray(final BufferedImage image) throws BioFormatsImageException {
+        byte[] ret = null;
+        try (final ByteArrayOutputStream bos = new ByteArrayOutputStream();
+                final ImageOutputStream ios = ImageIO.createImageOutputStream(bos);) {
+            final ImageWriter writer = ImageIO.getImageWritersByFormatName("png").next();
+            final ImageWriteParam param = writer.getDefaultWriteParam();
+            if (param.canWriteCompressed()) {
+                param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
+                param.setCompressionQuality(0.0f);
+            }
+            writer.setOutput(ios);
+            writer.write(null, new IIOImage(image, null, null), param);
+            writer.dispose();
+            ret = bos.toByteArray();
+        } catch (final IOException e) {
+            throw new BioFormatsImageException(e);
+        }
+
+        return ret;
+    }
+
+    public static String getDataUri(final BufferedImage image, final String mimeType) throws BioFormatsImageException {
+        byte[] bytes = null;
+        switch (mimeType) {
+            case "image/png":
+                bytes = getPngByteArray(image);
+                break;
+            case "image/jpeg":
+                bytes = getJpegByteArray(image, JPEG_QUALITY, BACKGROUND_COLOR);
+                break;
+            default:
+                throw new BioFormatsImageException("Unsupported image format: " + mimeType);
+        }
+        if (bytes.length == 0) {
+            throw new BioFormatsImageException("Failed to convert to " + mimeType + " format");
+        }
+        final String dataUri = "data:" + mimeType + ";base64," + Base64.getEncoder().encodeToString(bytes);
+
+        return dataUri;
+    }
+
+    public static BufferedImage getImageFromBioFormatsFile(final String path) throws BioFormatsImageException {
+        BufferedImage ret = null;
+        final BufferedImageReader reader = new BufferedImageReader(new ImageReader());
+        reader.setFlattenedResolutions(false);
+        reader.setNormalized(true);
+        reader.setOriginalMetadataPopulated(false);
+        reader.setMetadataFiltered(true);
+        try {
+            reader.setId(path);
+        } catch (FormatException | IOException e) {
+            throw new BioFormatsImageException("unsupported file: " + path);
+        } catch (Throwable t) {
+            throw new BioFormatsImageException(t);
+        }
+        try {
+            int series = 0;
+            final int seriesCount = reader.getSeriesCount();
+            for (int i = 0; i < seriesCount; i++) {
+                reader.setSeries(i);
+                if (reader.isThumbnailSeries()) {
+                    series = i;
+                    break;
+                }
+            }
+            reader.setSeries(series);
+            final int z = reader.getSizeZ() / 2; // middle of slices
+            final int t = reader.getSizeT() / 2; // middle of frames
+            final int c = 0; // first channel
+            final int no = reader.getIndex(z, c, t);
+            // System.out.println("series count: " + seriesCount);
+            // System.out.println("image count: " + reader.getImageCount());
+            // System.out.println("resolution: " + reader.getResolutionCount());
+            // System.out.println("thumbnail series: " + series);
+            ret = reader.openThumbImage(no);
+            final boolean is16bit = reader.getBitsPerPixel() > 8;
+            final boolean isGrayScale = ret.getSampleModel().getNumBands() == 1;
+            if (is16bit || isGrayScale) {
+                // perform auto scaling if 16bit or gray scale thumbnail image.
+                ret = AWTImageTools.autoscale(ret);
+            }
+        } catch (final Throwable t) {
+            for (Throwable e = t; e != null; e = e.getCause()) {
+                if (e instanceof OutOfMemoryError) {
+                    throw new BioFormatsImageException("out of memory");
+                }
+            }
+            throw new BioFormatsImageException(t);
+        } finally {
+            try {
+                reader.close();
+            } catch (final IOException e) {
+                throw new BioFormatsImageException(e);
+            }
+        }
+
+        return ret;
+    }
+
+    public static BufferedImage getImageFromFile(final String path) throws BioFormatsImageException {
+        BufferedImage ret = null;
+        final File file = new File(path);
+        try {
+            ret = ImageIO.read(file);
+        } catch (final IOException e) {
+            throw new BioFormatsImageException(e);
+        }
+
+        return ret;
+    }
+
+    public static void saveFile(final String dataUri, final String path) throws BioFormatsImageException {
+        final Pattern pattern = Pattern.compile("^data:(image/[^;]+);(base64|utf8),(.*)$", Pattern.MULTILINE);
+        final Matcher matcher = pattern.matcher(dataUri);
+        if (!matcher.find()) {
+            throw new BioFormatsImageException("Unsupported data URI format");
+        }
+        final byte[] bytes = matcher.group(2) == "utf8" ? matcher.group(3).getBytes()
+                : Base64.getDecoder().decode(matcher.group(3));
+        try (final FileOutputStream fos = new FileOutputStream(path);) {
+            fos.write(bytes);
+        } catch (final IOException e) {
+            throw new BioFormatsImageException(e);
+        }
+    }
+
+    public static boolean readThumbnail(final String path, final Map<String, Object> thumbnail) {
+        boolean ret = true;
+        try {
+            final BufferedImage image = getImageFromBioFormatsFile(path);
+            final int width = image.getWidth();
+            final int height = image.getHeight();
+            final String mimeType = image.getColorModel().hasAlpha() ? "image/png" : "image/jpeg";
+            final String dataUri = getDataUri(image, mimeType);
+            thumbnail.put("width", width);
+            thumbnail.put("height", height);
+            thumbnail.put("mimeType", mimeType);
+            thumbnail.put("url", dataUri);
+        } catch (final Throwable t) {
+            // ignore
+            ret = false;
+        }
+
+        return ret;
+    }
+
+    public static void main(final String[] args) {
+        if (args.length != 1) {
+            System.out.println("filename argument required");
+            System.exit(1);
+        }
+        final String path = args[0];
+        try {
+            DebugTools.enableLogging("OFF");
+            BufferedImage image = getImageFromBioFormatsFile(path);
+            final String format = image.getColorModel().hasAlpha() ? "png" : "jpeg";
+            // image = resize(image, 160, 160);
+            final String dataUri = getDataUri(image, "image/" + format);
+            System.out.println(dataUri);
+            // saveFile(dataUri, "/var/tmp/thumbnail." + format);
+        } catch (final Throwable t) {
+            // t.printStackTrace();
+            System.out.println(t.getMessage());
+            System.exit(1);
+        }
+    }
+}