Add Cloud Vision landmark detection sample.

Author: jmdobry

vision/samples/landmarkDetection.js

@@ -0,0 +1,80 @@
+// Copyright 2016, Google, Inc.
+// 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.
+
+'use strict';
+
+// [START app]
+// [START import_libraries]
+var gcloud = require('gcloud');
+// [END import_libraries]
+
+// [START authenticate]
+// You must set the GOOGLE_APPLICATION_CREDENTIALS and GCLOUD_PROJECT
+// environment variables to run this sample. See:
+// https://github.com/GoogleCloudPlatform/gcloud-node/blob/master/docs/authentication.md
+var projectId = process.env.GCLOUD_PROJECT;
+
+// Initialize gcloud
+gcloud = gcloud({
+  projectId: projectId
+});
+
+// Get a reference to the vision component
+var vision = gcloud.vision();
+// [END authenticate]
+
+/**
+ * Uses the Vision API to detect landmarks in the given file.
+ */
+// [START construct_request]
+function detectLandmarks(inputFile, callback) {
+  var options = { verbose: true };
+
+  // Make a call to the Vision API to detect the landmarks
+  vision.detectLandmarks(inputFile, options, function (err, landmarks) {
+    if (err) {
+      return callback(err);
+    }
+    console.log('result:', JSON.stringify(landmarks, null, 2));
+    callback(null, landmarks);
+  });
+}
+// [END construct_request]
+
+// Run the example
+function main(inputFile, callback) {
+  detectLandmarks(inputFile, function (err, landmarks) {
+    if (err) {
+      return callback(err);
+    }
+
+    // [START parse_response]
+    console.log('Found landmark: ' + landmarks[0].desc + ' for ' + inputFile);
+    // [END parse_response]
+    callback(null, landmarks);
+  });
+}
+
+// [START run_application]
+if (module === require.main) {
+  if (process.argv.length < 3) {
+    console.log('Usage: node landmarkDetection <inputFile>');
+    process.exit(1);
+  }
+  var inputFile = process.argv[2];
+  main(inputFile, console.log);
+}
+// [END run_application]
+// [END app]
+
+exports.main = main;

vision/samples/package.json

@@ -9,7 +9,8 @@
   },
   "scripts": {
     "faceDetection": "node faceDetection.js",
-    "labelDetection": "node labelDetection.js"
+    "labelDetection": "node labelDetection.js",
+    "landmarkDetection": "node landmarkDetection.js"
   },
   "dependencies": {
     "gcloud": "^0.32.0",