Add Vision image properties detection.

Author: daspecster

docs/index.rst

@@ -149,6 +149,7 @@
 
  vision-usage
  vision-client
+ vision-color
  vision-entity
  vision-feature
  vision-face

docs/vision-color.rst

@@ -0,0 +1,10 @@
+Vision Image Properties
+=======================
+
+Image Properties Annotation
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. automodule:: google.cloud.vision.color
+ :members:
+ :undoc-members:
+ :show-inheritance:

google/cloud/vision/color.py

@@ -0,0 +1,191 @@
+# Copyright 2016 Google Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Image properties class representation derived from Vision API response."""
+
+
+class ImagePropertiesAnnotation(object):
+ """Representation of image properties
+
+ :type colors: list
+ :param colors: List of
+ :class:`~google.cloud.vision.color.ColorInformation`.
+ """
+ def __init__(self, colors):
+ self._colors = colors
+
+ @classmethod
+ def from_api_repr(cls, response):
+ """Factory: construct ``ImagePropertiesAnnotation`` from a response.
+
+ :type response: dict
+ :param response: Dictionary response from Vision API with image
+ properties data.
+
+ :rtype: :class:`~google.cloud.vision.color.ImagePropertiesAnnotation`.
+ :returns: Populated instance of ``ImagePropertiesAnnotation``.
+ """
+ colors = [ColorInformation.from_api_repr(color) for color in
+ response['dominantColors']['colors']]
+ return cls(colors)
+
+ @property
+ def colors(self):
+ """Colors in an image.
+
+ :rtype: list of :class:`~google.cloud.vision.color.ColorInformation`
+ :returns: Populated list of ``ColorInformation``.
+ """
+ return self._colors
+
+
+class Color(object):
+ """Representation of RGBA color information.
+
+ :type red: int
+ :param red: The amount of red in the color as a value in the interval
+ [0, 1].
+
+ :type green: int
+ :param green: The amount of green in the color as a value in the interval
+ [0, 1].
+
+ :type blue: int
+ :param blue: The amount of blue in the color as a value in the interval
+ [0, 1].
+
+ :type alpha: float
+ :param alpha: The fraction of this color that should be applied to the
+ pixel.
+ """
+ def __init__(self, red, green, blue, alpha):
+ self._red = red
+ self._green = green
+ self._blue = blue
+ self._alpha = alpha
+
+ @classmethod
+ def from_api_repr(cls, response):
+ """Factory: construct a ``Color`` from a Vision API response.
+
+ :type response: dict
+ :param response: Color from API Response.
+
+ :rtype: :class:`~google.cloud.vision.color.Color`
+ :returns: Instance of :class:`~google.cloud.vision.color.Color`.
+ """
+ red = response['red']
+ green = response['green']
+ blue = response['blue']
+ alpha = response.get('alpha')
+
+ return cls(red, green, blue, alpha)
+
+ @property
+ def red(self):
+ """Red color.
+
+ :rtype: int
+ :returns: Red RGB value.
+ """
+ return self._red
+
+ @property
+ def green(self):
+ """Green color.
+
+ :rtype: int
+ :returns: Green RGB value.
+ """
+ return self._green
+
+ @property
+ def blue(self):
+ """Blue color.
+
+ :rtype: int
+ :returns: Blue RGB value.
+ """
+ return self._blue
+
+ @property
+ def alpha(self):
+ """Alpha level.
+
+ :rtype: float
+ :returns: Alpha transparency level.
+ """
+ return self._alpha
+
+
+class ColorInformation(object):
+ """Representation of color information from API response.
+
+ :type color: :class:`~google.cloud.vision.color.Color`
+ :param color: RGB components of the color.
+
+ :type score: float
+ :param score: Image-specific score for this color. Value in range [0, 1].
+
+ :type pixel_fraction: float
+ :param pixel_fraction: Stores the fraction of pixels the color occupies in
+ the image. Value in range [0, 1].
+ """
+ def __init__(self, color, score, pixel_fraction):
+ self._color = color
+ self._score = score
+ self._pixel_fraction = pixel_fraction
+
+ @classmethod
+ def from_api_repr(cls, response):
+ """Factory: construct ``ColorInformation`` for a color found.
+
+ :type response: dict
+ :param response: Color data with extra meta information.
+
+ :rtype: :class:`~google.cloud.vision.color.ColorInformation`
+ :returns: Instance of ``ColorInformation``.
+ """
+ color = Color.from_api_repr(response['color'])
+ score = response['score']
+ pixel_fraction = response['pixelFraction']
+
+ return cls(color, score, pixel_fraction)
+
+ @property
+ def color(self):
+ """RGB components of the color.
+
+ :rtype: :class:`~google.vision.color.Color`
+ :returns: Instance of ``Color``.
+ """
+ return self._color
+
+ @property
+ def score(self):
+ """Image-specific score for this color. Value in range [0, 1].
+
+ :rtype: float
+ :returns: Image score for this color.
+ """
+ return self._score
+
+ @property
+ def pixel_fraction(self):
+ """Stores the fraction of pixels the color occupies in the image.
+
+ :rtype: float
+ :returns: Pixel fraction value in range [0, 1].
+ """
+ return self._pixel_fraction

google/cloud/vision/feature.py

@@ -27,6 +27,7 @@ class FeatureTypes(object):
  LABEL_DETECTION = 'LABEL_DETECTION'
  TEXT_DETECTION = 'TEXT_DETECTION'
  SAFE_SEARCH_DETECTION = 'SAFE_SEARCH_DETECTION'
+ IMAGE_PROPERTIES = 'IMAGE_PROPERTIES'
 
 
 class Feature(object):

google/cloud/vision/image.py

@@ -22,6 +22,7 @@
 from google.cloud.vision.face import Face
 from google.cloud.vision.feature import Feature
 from google.cloud.vision.feature import FeatureTypes
+from google.cloud.vision.color import ImagePropertiesAnnotation
 from google.cloud.vision.safe import SafeSearchAnnotation
 
 
@@ -125,22 +126,6 @@ def detect_faces(self, limit=10):
 
  return faces
 
- def detect_safe_search(self, limit=10):
- """Retreive safe search properties from an image.
-
- :type limit: int
- :param limit: The number of faces to try and detect.
-
- :rtype: list
- :returns: List of
- :class:`~google.cloud.vision.sage.SafeSearchAnnotation`.
- """
- safe_detection_feature = Feature(FeatureTypes.SAFE_SEARCH_DETECTION,
- limit)
- result = self.client.annotate(self, [safe_detection_feature])
- safe_search_response = result['safeSearchAnnotation']
- return SafeSearchAnnotation.from_api_repr(safe_search_response)
-
  def detect_labels(self, limit=10):
  """Detect labels that describe objects in an image.
 
@@ -179,6 +164,21 @@ def detect_logos(self, limit=10):
  feature = Feature(FeatureTypes.LOGO_DETECTION, limit)
  return self._detect_annotation(feature)
 
+ def detect_properties(self, limit=10):
+ """Detect the color properties of an image.
+
+ :type limit: int
+ :param limit: The maximum number of image properties to find.
+
+ :rtype: list
+ :returns: List of
+ :class:`~google.cloud.vision.color.ImagePropertiesAnnotation`.
+ """
+ feature = Feature(FeatureTypes.IMAGE_PROPERTIES, limit)
+ result = self.client.annotate(self, [feature])
+ response = result['imagePropertiesAnnotation']
+ return ImagePropertiesAnnotation.from_api_repr(response)
+
  def detect_safe_search(self, limit=10):
  """Retreive safe search properties from an image.
 

unit_tests/vision/_fixtures.py

@@ -1,3 +1,107 @@
+IMAGE_PROPERTIES_RESPONSE = {
+ 'responses': [
+ {
+ 'imagePropertiesAnnotation': {
+ 'dominantColors': {
+ 'colors': [
+ {
+ 'color': {
+ 'red': 253,
+ 'green': 203,
+ 'blue': 65,
+ 'alpha': 0.0
+ },
+ 'score': 0.42258179,
+ 'pixelFraction': 0.025376344
+ },
+ {
+ 'color': {
+ 'red': 216,
+ 'green': 69,
+ 'blue': 56
+ },
+ 'score': 0.34945792,
+ 'pixelFraction': 0.026093191
+ },
+ {
+ 'color': {
+ 'red': 79,
+ 'green': 142,
+ 'blue': 245
+ },
+ 'score': 0.050921876,
+ 'pixelFraction': 0.014193549
+ },
+ {
+ 'color': {
+ 'red': 249,
+ 'green': 246,
+ 'blue': 246
+ },
+ 'score': 0.0059412993,
+ 'pixelFraction': 0.86896056
+ },
+ {
+ 'color': {
+ 'red': 222,
+ 'green': 119,
+ 'blue': 51
+ },
+ 'score': 0.0043299114,
+ 'pixelFraction': 0.00021505376
+ },
+ {
+ 'color': {
+ 'red': 226,
+ 'green': 138,
+ 'blue': 130
+ },
+ 'score': 0.0038594988,
+ 'pixelFraction': 0.00086021505
+ },
+ {
+ 'color': {
+ 'red': 165,
+ 'green': 194,
+ 'blue': 243
+ },
+ 'score': 0.0029492097,
+ 'pixelFraction': 0.0015053763
+ },
+ {
+ 'color': {
+ 'red': 231,
+ 'green': 169,
+ 'blue': 164
+ },
+ 'score': 0.0017002203,
+ 'pixelFraction': 0.00043010752
+ },
+ {
+ 'color': {
+ 'red': 137,
+ 'green': 98,
+ 'blue': 142
+ },
+ 'score': 0.0013974205,
+ 'pixelFraction': 0.00071684585
+ },
+ {
+ 'color': {
+ 'red': 239,
+ 'green': 179,
+ 'blue': 56
+ },
+ 'score': 0.050473157,
+ 'pixelFraction': 0.0022222223
+ }
+ ]
+ }
+ }
+ }
+ ]
+}
+
 LABEL_DETECTION_RESPONSE = {
  'responses': [
  {