diff --git a/src/main/java/ch/psi/daq/queryrest/controller/QueryRestController.java b/src/main/java/ch/psi/daq/queryrest/controller/QueryRestController.java
index 82061b6..fc27e03 100644
--- a/src/main/java/ch/psi/daq/queryrest/controller/QueryRestController.java
+++ b/src/main/java/ch/psi/daq/queryrest/controller/QueryRestController.java
@@ -43,6 +43,7 @@ import ch.psi.daq.domain.query.operation.Compression;
 import ch.psi.daq.domain.query.operation.QueryField;
 import ch.psi.daq.domain.query.response.Response;
 import ch.psi.daq.domain.query.response.ResponseFormat;
+import ch.psi.daq.domain.query.transform.image.color.ColorModelType;
 import ch.psi.daq.domain.query.transform.image.resize.ValueAggregation;
 import ch.psi.daq.domain.request.validate.RequestProviderValidator;
 import ch.psi.daq.queryrest.query.QueryManager;
@@ -368,12 +369,22 @@ public class QueryRestController {
    }
    
    /**
-    * Returns the current list of {@link Compression}s available.
+    * Returns the current list of {@link ValueAggregation}s available.
     * 
-    * @return list of {@link Compression}s as String array
+    * @return list of {@link ValueAggregation}s as String array
     */
    @RequestMapping(value = PARAMETERS_ROOT_PATH + "/valueaggregations", method = {RequestMethod.GET}, produces = {MediaType.APPLICATION_JSON_VALUE})
    public @ResponseBody List<ValueAggregation> getValueAggregations() {
       return Lists.newArrayList(ValueAggregation.values());
    }
+   
+   /**
+    * Returns the current list of {@link ValueAggregation}s available.
+    * 
+    * @return list of {@link ValueAggregation}s as String array
+    */
+   @RequestMapping(value = PARAMETERS_ROOT_PATH + "/colormodeltypes", method = {RequestMethod.GET}, produces = {MediaType.APPLICATION_JSON_VALUE})
+   public @ResponseBody List<ColorModelType> getColorModelTypes() {
+      return Lists.newArrayList(ColorModelType.values());
+   }
 }
diff --git a/src/test/java/ch/psi/daq/test/queryrest/controller/JsonQueryRestControllerTableTest.java b/src/test/java/ch/psi/daq/test/queryrest/controller/JsonQueryRestControllerTableTest.java
index c56ac93..08a28cb 100644
--- a/src/test/java/ch/psi/daq/test/queryrest/controller/JsonQueryRestControllerTableTest.java
+++ b/src/test/java/ch/psi/daq/test/queryrest/controller/JsonQueryRestControllerTableTest.java
@@ -45,6 +45,8 @@ import ch.psi.daq.domain.query.transform.ValueTransformationSequence;
 import ch.psi.daq.domain.query.transform.image.ImageEncodingValueTransformation;
 import ch.psi.daq.domain.query.transform.image.ImageDownScaleValueTransformation;
 import ch.psi.daq.domain.query.transform.image.ImageFormat;
+import ch.psi.daq.domain.query.transform.image.color.ColorModelType;
+import ch.psi.daq.domain.query.transform.image.color.TypedColorModel;
 import ch.psi.daq.domain.query.transform.image.encoding.Base64ImageEncoder;
 import ch.psi.daq.domain.query.transform.sampling.ValueSamplerValueTransformation;
 import ch.psi.daq.domain.request.range.RequestRangeDate;
@@ -2223,7 +2225,11 @@ public class JsonQueryRestControllerTableTest extends AbstractDaqRestTest {
       request.addValueTransformation(
             new ValueTransformationSequence(
                   ValueTransformationSequence.ALL_CHANNELS,
-                  new ImageDownScaleValueTransformation(8, Color.BLUE, Color.RED),
+                  new ImageDownScaleValueTransformation(8, 
+                        new TypedColorModel(
+                              ColorModelType.LINEAR,
+                              64,
+                              Arrays.asList(Color.BLUE, Color.RED))),
                   new ImageEncodingValueTransformation(
                         ImageFormat.PNG,
                         new Base64ImageEncoder(StandardCharsets.UTF_8, true, false))));
@@ -2310,7 +2316,11 @@ public class JsonQueryRestControllerTableTest extends AbstractDaqRestTest {
       request.addValueTransformation(
             new ValueTransformationSequence(
                   null,
-                  new ImageDownScaleValueTransformation(8, Color.BLUE, Color.RED),
+                  new ImageDownScaleValueTransformation(8, 
+                        new TypedColorModel(
+                              ColorModelType.LINEAR,
+                              64,
+                              Arrays.asList(Color.BLUE, Color.RED))),
                   new ImageEncodingValueTransformation(
                         ImageFormat.PNG,
                         new Base64ImageEncoder(StandardCharsets.UTF_8, true, false))));
diff --git a/src/test/java/ch/psi/daq/test/queryrest/controller/JsonQueryRestControllerTest.java b/src/test/java/ch/psi/daq/test/queryrest/controller/JsonQueryRestControllerTest.java
index 11a3766..c798111 100644
--- a/src/test/java/ch/psi/daq/test/queryrest/controller/JsonQueryRestControllerTest.java
+++ b/src/test/java/ch/psi/daq/test/queryrest/controller/JsonQueryRestControllerTest.java
@@ -40,6 +40,8 @@ import ch.psi.daq.domain.query.transform.ValueTransformationSequence;
 import ch.psi.daq.domain.query.transform.image.ImageEncodingValueTransformation;
 import ch.psi.daq.domain.query.transform.image.ImageDownScaleValueTransformation;
 import ch.psi.daq.domain.query.transform.image.ImageFormat;
+import ch.psi.daq.domain.query.transform.image.color.ColorModelType;
+import ch.psi.daq.domain.query.transform.image.color.TypedColorModel;
 import ch.psi.daq.domain.query.transform.image.encoding.Base64ImageEncoder;
 import ch.psi.daq.domain.query.transform.sampling.ValueSamplerValueTransformation;
 import ch.psi.daq.domain.request.range.RequestRangeDate;
@@ -1145,7 +1147,11 @@ public class JsonQueryRestControllerTest extends AbstractDaqRestTest {
       request.addValueTransformation(
             new ValueTransformationSequence(
                   ValueTransformationSequence.ALL_CHANNELS,
-                  new ImageDownScaleValueTransformation(8, Color.BLUE, Color.RED),
+                  new ImageDownScaleValueTransformation(8,
+                        new TypedColorModel(
+                              ColorModelType.LINEAR,
+                              64,
+                              Arrays.asList(Color.BLUE, Color.RED))),
                   new ImageEncodingValueTransformation(
                         ImageFormat.PNG,
                         new Base64ImageEncoder(StandardCharsets.UTF_8, true, false))));
@@ -1187,8 +1193,7 @@ public class JsonQueryRestControllerTest extends AbstractDaqRestTest {
       request.addValueTransformation(
             new ValueTransformationSequence(
                   channelName,
-                  new ValueSamplerValueTransformation(2))
-            );
+                  new ValueSamplerValueTransformation(2)));
 
       String content = mapper.writeValueAsString(request);
       System.out.println(content);
@@ -1213,7 +1218,7 @@ public class JsonQueryRestControllerTest extends AbstractDaqRestTest {
       value = JsonPath.read(document, "$[0].data[1].transformedValue.value").toString();
       assertTrue(value.startsWith("[101.0,"));
    }
-   
+
    @Test
    public void testValueTransformation_03() throws Exception {
       String channelName = "TestImage";
@@ -1231,7 +1236,10 @@ public class JsonQueryRestControllerTest extends AbstractDaqRestTest {
       request.addValueTransformation(
             new ValueTransformationSequence(
                   null,
-                  new ImageDownScaleValueTransformation(8, Color.BLUE, Color.RED),
+                  new ImageDownScaleValueTransformation(8, new TypedColorModel(
+                        ColorModelType.LINEAR,
+                        64,
+                        Arrays.asList(Color.BLUE, Color.RED))),
                   new ImageEncodingValueTransformation(
                         ImageFormat.PNG,
                         new Base64ImageEncoder(StandardCharsets.UTF_8, true, false))));
@@ -1259,7 +1267,7 @@ public class JsonQueryRestControllerTest extends AbstractDaqRestTest {
       assertTrue(image.startsWith(imageScheme));
       image = JsonPath.read(document, "$[0].data[1].transformedValue");
       assertTrue(image.startsWith(imageScheme));
-      
+
       String shape = JsonPath.read(document, "$[1].data[0].transformedValue.shape").toString();
       assertEquals("[40,20]", shape);
       String value = JsonPath.read(document, "$[1].data[0].transformedValue.value").toString();