update generate segmentation to handle cornerstone metadata objects

src/adapters/Cornerstone/Segmentation_4X.js

@@ -46,18 +46,34 @@ const generateSegmentationDefaultOptions = {
  * imageIds, images and the cornerstoneTools brushData.
  *
  * @param  {object[]} images An array of cornerstone images that contain the source
- *                           data under `image.data.byteArray.buffer` or an array of DICOM JSON Objects.
+ *                           data under `image.data.byteArray.buffer` or an array of image metadata objects
+ *                           from CornerstoneWadoImageLoader's MetadataProvider.
  * @param  {Object|Object[]} inputLabelmaps3D The cornerstone `Labelmap3D` object, or an array of objects.
  * @param  {Object} userOptions Options to pass to the segmentation derivation and `fillSegmentation`.
  * @returns {Blob}
  */
 function generateSegmentation(images, inputLabelmaps3D, userOptions = {}) {
-    const isMultiframe = images[0].imageId.includes("?frame");
     const isDataAvailable = images[0] && !!images[0].data;
-    const segmentation = isDataAvailable
-        ? _createSegFromImages(images, isMultiframe, userOptions)
-        : _createSegFromJSONObjects(images, isMultiframe, userOptions);
-    return fillSegmentation(segmentation, inputLabelmaps3D, userOptions);
+    if (isDataAvailable) {
+        // Cornerstone image object
+        const isMultiframe = images[0].imageId.includes("?frame");
+        const segmentation = _createSegFromImages(
+            images,
+            isMultiframe,
+            userOptions
+        );
+        return fillSegmentation(segmentation, inputLabelmaps3D, userOptions);
+    } else {
+        // Cornerstone metadata objects
+        const isMultiframe = images[0].isMultiframe;
+        images.forEach(image => delete image.isMultiframe);
+        const segmentation = _createSegFromJSONObjects(
+            images,
+            isMultiframe,
+            userOptions
+        );
+        return fillSegmentation(segmentation, inputLabelmaps3D, userOptions);
+    }
 }
 
 /**