How to classify image using IBM Visual Recognition API Version 3

Question

I have written below code in Node.js to create a classifier and then classify an image using Visual Recognition API Version 3, but the image isn't classified with the created classifier.

Same code has worked with earlier version. Please share your thoughts.

Thanks in advance!

var visual_recognition, params;
var ONE_HOUR = 3600000;
var CLASSIFIERID = [];


    // Create the service wrapper
  visual_recognition = watson.visual_recognition({
     version: 'v3',
     api_key: process.env.API_KEY || '<api-key>',
     version_date: '2015-05-19'
    });

Creating classfier:

params = {
    name: constants.DRIVERNAME, 
    driverOne_positive_examples: fs.createReadStream('./public/positive.zip'),
    negative_examples: fs.createReadStream('./public/negative.zip')
    };

    visual_recognition.createClassifier(params, function(err, classifier) { 
     if (err){          

        res.render('showError',{title:constants.TITLE1,
                                    err:'Something went wrong!'
                                    });
     }

     else{

        CLASSIFIERID.push(classifier.classifier_id);
         }  

    });

Classify image:

var parm = {
      images_file: img_classify,
      classifier_ids: CLASSIFIERID,
      threshold: 0.0
    };

visual_recognition.classify(parm, function(err, results) {
    var driverName,driverScore,driverId,driver;

    if (err){
      console.log('Error at classification!!!');

    }

    else{

        console.log('Image has been classified!!!');
    res.json(results); 
}

Hi Joe, It is not getting Error, but after Classifying the image the "results" JSON is having below data. {"custom_classes":0,"images":[{"classifiers":[],"image":"test.jpg"}],"images_processed":1}. — phanindra, Jul 21 '16 at 08:01

score 0 · Answer 1 · answered Apr 03 '17 at 00:57

You need to specify classifier_ids using an array.

var parm = {
      images_file: img_classify,
      classifier_ids: [CLASSIFIERID], // <--- See this
      threshold: 0.0
    };

visual_recognition.classify(parm, function(err, results) {
    var driverName,driverScore,driverId,driver;

    if (err){
      console.log('Error at classification!!!');

    }

    else{

        console.log('Image has been classified!!!');
    res.json(results); 
}

Visual Recognition Node SDK documentation.

How to classify image using IBM Visual Recognition API Version 3

1 Answers1