Add GAPIC support for image properties detection.

Author: daspecster

docs/vision-usage.rst

@@ -271,13 +271,13 @@ image and determine the dominant colors in the image.
     >>> client = vision.Client()
     >>> with open('./image.jpg', 'rb') as image_file:
     ...     image = client.image(content=image_file.read())
-    >>> results = image.detect_properties()
-    >>> colors = results[0].colors
+    >>> properties = image.detect_properties()
+    >>> colors = properties.colors
     >>> first_color = colors[0]
     >>> first_color.red
-    244
+    244.0
     >>> first_color.blue
-    134
+    134.0
     >>> first_color.score
     0.65519291
     >>> first_color.pixel_fraction

system_tests/vision.py

@@ -474,13 +474,13 @@ def tearDown(self):
             value.delete()
 
     def _assert_color(self, color):
-        self.assertIsInstance(color.red, int)
-        self.assertIsInstance(color.green, int)
-        self.assertIsInstance(color.blue, int)
+        self.assertIsInstance(color.red, float)
+        self.assertIsInstance(color.green, float)
+        self.assertIsInstance(color.blue, float)
+        self.assertIsInstance(color.alpha, float)
         self.assertNotEqual(color.red, 0.0)
         self.assertNotEqual(color.green, 0.0)
         self.assertNotEqual(color.blue, 0.0)
-        self.assertIsInstance(color.alpha, float)
 
     def _assert_properties(self, image_property):
         from google.cloud.vision.color import ImagePropertiesAnnotation
@@ -493,19 +493,13 @@ def _assert_properties(self, image_property):
             self.assertNotEqual(color_info.score, 0.0)
 
     def test_detect_properties_content(self):
-        self._pb_not_implemented_skip(
-            'gRPC not implemented for image properties detection.')
         client = Config.CLIENT
         with open(FACE_FILE, 'rb') as image_file:
             image = client.image(content=image_file.read())
         properties = image.detect_properties()
-        self.assertEqual(len(properties), 1)
-        image_property = properties[0]
-        self._assert_properties(image_property)
+        self._assert_properties(properties)
 
     def test_detect_properties_gcs(self):
-        self._pb_not_implemented_skip(
-            'gRPC not implemented for image properties detection.')
         client = Config.CLIENT
         bucket_name = Config.TEST_BUCKET.name
         blob_name = 'faces.jpg'
@@ -518,16 +512,10 @@ def test_detect_properties_gcs(self):
 
         image = client.image(source_uri=source_uri)
         properties = image.detect_properties()
-        self.assertEqual(len(properties), 1)
-        image_property = properties[0]
-        self._assert_properties(image_property)
+        self._assert_properties(properties)
 
     def test_detect_properties_filename(self):
-        self._pb_not_implemented_skip(
-            'gRPC not implemented for image properties detection.')
         client = Config.CLIENT
         image = client.image(filename=FACE_FILE)
         properties = image.detect_properties()
-        self.assertEqual(len(properties), 1)
-        image_property = properties[0]
-        self._assert_properties(image_property)
+        self._assert_properties(properties)

vision/google/cloud/vision/annotations.py

@@ -14,6 +14,7 @@
 
 """Annotations management for Vision API responses."""
 
+import six
 
 from google.cloud.vision.color import ImagePropertiesAnnotation
 from google.cloud.vision.entity import EntityAnnotation
@@ -86,11 +87,11 @@ def from_api_repr(cls, response):
         :rtype: :class:`~google.cloud.vision.annotations.Annotations`
         :returns: An instance of ``Annotations`` with detection types loaded.
         """
-        annotations = {}
-        for feature_type, annotation in response.items():
-            curr_feature = annotations.setdefault(_KEY_MAP[feature_type], [])
-            curr_feature.extend(
-                _entity_from_response_type(feature_type, annotation))
+        annotations = {
+            _KEY_MAP[feature_type]: _entity_from_response_type(
+                feature_type, annotation)
+            for feature_type, annotation in six.iteritems(response)
+        }
         return cls(**annotations)
 
     @classmethod
@@ -123,12 +124,14 @@ def _process_image_annotations(image):
         'labels': _make_entity_from_pb(image.label_annotations),
         'landmarks': _make_entity_from_pb(image.landmark_annotations),
         'logos': _make_entity_from_pb(image.logo_annotations),
+        'properties': _make_image_properties_from_pb(
+            image.image_properties_annotation),
         'texts': _make_entity_from_pb(image.text_annotations),
     }
 
 
 def _make_entity_from_pb(annotations):
-    """Create an entity from a gRPC response.
+    """Create an entity from a protobuf response.
 
     :type annotations:
     :class:`~google.cloud.grpc.vision.v1.image_annotator_pb2.EntityAnnotation`
@@ -141,7 +144,7 @@ def _make_entity_from_pb(annotations):
 
 
 def _make_faces_from_pb(faces):
-    """Create face objects from a gRPC response.
+    """Create face objects from a protobuf response.
 
     :type faces:
     :class:`~google.cloud.grpc.vision.v1.image_annotator_pb2.FaceAnnotation`
@@ -153,6 +156,20 @@ def _make_faces_from_pb(faces):
     return [Face.from_pb(face) for face in faces]
 
 
+def _make_image_properties_from_pb(image_properties):
+    """Create ``ImageProperties`` object from a protobuf response.
+
+    :type image_properties: :class:`~google.cloud.grpc.vision.v1.\
+                            image_annotator_pb2.ImagePropertiesAnnotation`
+    :param image_properties: Protobuf instance of
+                             ``ImagePropertiesAnnotation``.
+
+    :rtype: list or ``None``
+    :returns: List of ``ImageProperties`` or ``None``.
+    """
+    return ImagePropertiesAnnotation.from_pb(image_properties)
+
+
 def _entity_from_response_type(feature_type, results):
     """Convert a JSON result to an entity type based on the feature.
 
@@ -168,8 +185,7 @@ def _entity_from_response_type(feature_type, results):
         detected_objects.extend(
             Face.from_api_repr(face) for face in results)
     elif feature_type == _IMAGE_PROPERTIES_ANNOTATION:
-        detected_objects.append(
-            ImagePropertiesAnnotation.from_api_repr(results))
+        return ImagePropertiesAnnotation.from_api_repr(results)
     elif feature_type == _SAFE_SEARCH_ANNOTATION:
         detected_objects.append(SafeSearchAnnotation.from_api_repr(results))
     else:

vision/google/cloud/vision/color.py

@@ -26,20 +26,37 @@ def __init__(self, colors):
         self._colors = colors
 
     @classmethod
-    def from_api_repr(cls, response):
+    def from_api_repr(cls, image_properties):
         """Factory: construct ``ImagePropertiesAnnotation`` from a response.
 
-        :type response: dict
-        :param response: Dictionary response from Vision API with image
-                         properties data.
+        :type image_properties: dict
+        :param image_properties: Dictionary response from Vision API with image
+                                 properties data.
+
+        :rtype: list of
+                :class:`~google.cloud.vision.color.ImagePropertiesAnnotation`.
+        :returns: List of ``ImagePropertiesAnnotation``.
+        """
+        colors = image_properties.get('dominantColors', {}).get('colors', ())
+        return cls([ColorInformation.from_api_repr(color)
+                    for color in colors])
+
+    @classmethod
+    def from_pb(cls, image_properties):
+        """Factory: construct ``ImagePropertiesAnnotation`` from a response.
+
+        :type image_properties: :class:`~google.cloud.grpc.vision.v1.\
+                                image_annotator_pb2.ImageProperties`
+        :param image_properties: Protobuf response from Vision API with image
+                                 properties data.
 
-        :rtype: :class:`~google.cloud.vision.color.ImagePropertiesAnnotation`.
-        :returns: Populated instance of ``ImagePropertiesAnnotation``.
+        :rtype: list of
+                :class:`~google.cloud.vision.color.ImagePropertiesAnnotation`
+        :returns: List of ``ImagePropertiesAnnotation``.
         """
-        raw_colors = response.get('dominantColors', {}).get('colors', ())
-        colors = [ColorInformation.from_api_repr(color)
-                  for color in raw_colors]
-        return cls(colors)
+        colors = getattr(image_properties.dominant_colors, 'colors', ())
+        if len(colors) > 0:
+            return cls([ColorInformation.from_pb(color) for color in colors])
 
     @property
     def colors(self):
@@ -54,17 +71,17 @@ def colors(self):
 class Color(object):
     """Representation of RGBA color information.
 
-    :type red: int
+    :type red: float
     :param red: The amount of red in the color as a value in the interval
-                [0, 255].
+                [0.0, 255.0].
 
-    :type green: int
+    :type green: float
     :param green: The amount of green in the color as a value in the interval
-                  [0, 255].
+                  [0.0, 255.0].
 
-    :type blue: int
+    :type blue: float
     :param blue: The amount of blue in the color as a value in the interval
-                 [0, 255].
+                 [0.0, 255.0].
 
     :type alpha: float
     :param alpha: The fraction of this color that should be applied to the
@@ -86,13 +103,25 @@ def from_api_repr(cls, response):
         :rtype: :class:`~google.cloud.vision.color.Color`
         :returns: Instance of :class:`~google.cloud.vision.color.Color`.
         """
-        red = response.get('red', 0)
-        green = response.get('green', 0)
-        blue = response.get('blue', 0)
+        red = float(response.get('red', 0.0))
+        green = float(response.get('green', 0.0))
+        blue = float(response.get('blue', 0.0))
         alpha = response.get('alpha', 0.0)
 
         return cls(red, green, blue, alpha)
 
+    @classmethod
+    def from_pb(cls, color):
+        """Factory: construct a ``Color`` from a protobuf response.
+
+        :type color: :module: `google.type.color_pb2`
+        :param color: ``Color`` from API Response.
+
+        :rtype: :class:`~google.cloud.vision.color.Color`
+        :returns: Instance of :class:`~google.cloud.vision.color.Color`.
+        """
+        return cls(color.red, color.green, color.blue, color.alpha.value)
+
     @property
     def red(self):
         """Red component of the color.
@@ -149,19 +178,34 @@ def __init__(self, color, score, pixel_fraction):
         self._pixel_fraction = pixel_fraction
 
     @classmethod
-    def from_api_repr(cls, response):
-        """Factory: construct ``ColorInformation`` for a color found.
+    def from_api_repr(cls, color_information):
+        """Factory: construct ``ColorInformation`` for a color.
 
-        :type response: dict
-        :param response: Color data with extra meta information.
+        :type color_information: dict
+        :param color_information: Color data with extra meta information.
 
         :rtype: :class:`~google.cloud.vision.color.ColorInformation`
         :returns: Instance of ``ColorInformation``.
         """
-        color = Color.from_api_repr(response.get('color'))
-        score = response.get('score')
-        pixel_fraction = response.get('pixelFraction')
+        color = Color.from_api_repr(color_information.get('color', {}))
+        score = color_information.get('score')
+        pixel_fraction = color_information.get('pixelFraction')
+        return cls(color, score, pixel_fraction)
 
+    @classmethod
+    def from_pb(cls, color_information):
+        """Factory: construct ``ColorInformation`` for a color.
+
+        :type color_information: :class:`~google.cloud.grpc.vision.v1.\
+                                 image_annotator_pb2.ColorInfo`
+        :param color_information: Color data with extra meta information.
+
+        :rtype: :class:`~google.cloud.vision.color.ColorInformation`
+        :returns: Instance of ``ColorInformation``.
+        """
+        color = Color.from_pb(color_information.color)
+        score = color_information.score
+        pixel_fraction = color_information.pixel_fraction
         return cls(color, score, pixel_fraction)
 
     @property

vision/unit_tests/test_annotations.py

@@ -77,7 +77,7 @@ def test_from_pb(self):
         self.assertEqual(annotations.landmarks, [])
         self.assertEqual(annotations.texts, [])
         self.assertEqual(annotations.safe_searches, ())
-        self.assertEqual(annotations.properties, ())
+        self.assertIsNone(annotations.properties)
 
 
 class Test__make_entity_from_pb(unittest.TestCase):
@@ -122,6 +122,37 @@ def test_it(self):
         self.assertIsInstance(faces[0], Face)
 
 
+class Test__make_image_properties_from_pb(unittest.TestCase):
+    def _call_fut(self, annotations):
+        from google.cloud.vision.annotations import (
+            _make_image_properties_from_pb)
+        return _make_image_properties_from_pb(annotations)
+
+    def test_it(self):
+        from google.cloud.grpc.vision.v1 import image_annotator_pb2
+        from google.protobuf.wrappers_pb2 import FloatValue
+        from google.type.color_pb2 import Color
+
+        alpha = FloatValue(value=1.0)
+        color_pb = Color(red=1.0, green=2.0, blue=3.0, alpha=alpha)
+        color_info_pb = image_annotator_pb2.ColorInfo(color=color_pb,
+                                                      score=1.0,
+                                                      pixel_fraction=1.0)
+        dominant_colors = image_annotator_pb2.DominantColorsAnnotation(
+            colors=[color_info_pb])
+
+        image_properties_pb = image_annotator_pb2.ImageProperties(
+            dominant_colors=dominant_colors)
+
+        image_properties = self._call_fut(image_properties_pb)
+        self.assertEqual(image_properties.colors[0].pixel_fraction, 1.0)
+        self.assertEqual(image_properties.colors[0].score, 1.0)
+        self.assertEqual(image_properties.colors[0].color.red, 1.0)
+        self.assertEqual(image_properties.colors[0].color.green, 2.0)
+        self.assertEqual(image_properties.colors[0].color.blue, 3.0)
+        self.assertEqual(image_properties.colors[0].color.alpha, 1.0)
+
+
 class Test__process_image_annotations(unittest.TestCase):
     def _call_fut(self, image):
         from google.cloud.vision.annotations import _process_image_annotations

vision/unit_tests/test_client.py

@@ -455,7 +455,7 @@ def test_image_properties_detection_from_source(self):
         client._connection = _Connection(RETURNED)
 
         image = client.image(source_uri=IMAGE_SOURCE)
-        image_properties = image.detect_properties()[0]
+        image_properties = image.detect_properties()
         self.assertIsInstance(image_properties, ImagePropertiesAnnotation)
         image_request = client._connection._requested[0]['data']['requests'][0]
         self.assertEqual(IMAGE_SOURCE,