Merge pull request #289 from tonysyu/qtmpl-collection-viewer

ENH: Add CollectionViewer.

viewer_examples/viewers/collection_viewer.py

@@ -0,0 +1,29 @@
+"""
+=====================
+CollectionViewer demo
+=====================
+
+Demo of CollectionViewer for viewing collections of images. This demo uses
+successively darker versions of the same image to fake an image collection.
+
+You can scroll through images with the slider, or you can interact with the
+viewer using your keyboard:
+
+left/right arrows
+    Previous/next image in collection.
+number keys, 0--9
+    0% to 90% of collection. For example, "5" goes to the image in the
+    middle (i.e. 50%) of the collection.
+home/end keys
+    First/last image in collection.
+
+"""
+import numpy as np
+from skimage import data
+from skimage.viewer import CollectionViewer
+
+img = data.lena()
+img_collection = [np.uint8(img * 0.9**i) for i in range(20)]
+
+view = CollectionViewer(img_collection)
+view.show()