Cloud Reco Samples - Reco Count

April 3, 2014 - 1:16am #1

The Cloud Recognition samples of the SDK release 2.8.7 (native samples version 2.8.8, Unity samples version 2.8.9) show how to start a Cloud search for target recogniton, using a sample DB.

In particular, the samples make use of the TargetFinde::start() API, by which the sample will enter a search mode where your Cloud Database is scanned for a possible target match. See also these pages for more details on Cloud Reco API usage:

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Cloud Reco - Using Target Metadata

May 6, 2013 - 3:50am #1


This article highlights the meaning and usage best practices for Cloud Targets Metadata.

In Vuforia, every Cloud Image Target has an associated Metadata; a target metadata is nothing else than a custom (user-defined) string, i.e. a blob of text that you can fill with any text you like.

Therefore, you can use the metadata just as a way to contain some information about the target, that your application will be able to process using some custom logic.

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VWS Authentication

January 14, 2023 - 1:04pm #1

I have an authentication failure on Postman.
Maybe it's the fault of my signature.
I created a Python code to generate the signature.
Here is the code:
import hmac
import hashlib
import base64
import urllib
import datetime
# Your VWS secret key
vws_secret_key = "704ed8658cd2bfc566bcabb3e84511b55221dd23"
# The HTTP method of your request
http_verb = "GET"
# The Content-MD5 of your request body

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EnableTracking fails syntax checking.

Unity Editor
June 12, 2022 - 11:11am #1

The function EnableTracking fails syntax checking.

The simple example code at;

Uses this function in the method OnNewSearchResult() yet this does not pass syntax checking.

Unity 2021.3.1f1

Vuforia Engine Version 10.7.2

Thanks in advance,


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Error Vuforia Cloud

January 14, 2022 - 12:28am #1
Topic solved

please help me

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Target Image field

January 11, 2022 - 4:27am #1
Topic solved



I just have a quick question.

After applying the script 'SimpleCloudRecoEventHandler' I don't have the input field for my reference image.

This is my script :

using UnityEngine;

using Vuforia;

Topic locked

Java example, please!

October 27, 2021 - 11:52am #1

Greetings fellow developers,

I'm trying to perform image recognition query as described in with Java. I've found some examples, but all of them are resulting in {"transaction_id":"3a0b97803864427aba06616a6ef1ca44","result_code":"AuthenticationFailure"}. I've tried to use client and server key and secret and nothing helped.

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Poor success rate

August 9, 2021 - 11:57pm #1

I uploaded 10k images and then resubmitted each one as a query to see how many would be properly identified by Vuforia.  I was disappoint to find that it only recognized approx 25% of the identical images!!!  Am I perhaps doing something wrong?  Does recognition get better with bigger images?  Thx

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Cloud Recognition & Rails

August 6, 2021 - 9:00pm #1
Topic solved

I'm struggling to encode the body of my Image Recognition query with Ruby on Rails.  Has anyone done this and can you help? 

I have been successful with Python and even copied the signatures and encoded file from Python and successfully made a query from Rails - I just can't get the encoding to work.


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Worldspace UI on Cloud target recognition

July 5, 2021 - 5:01am #1


I am trying to place worldspace Canvas with UI text elements on recognition of Cloud image target. But somehow, it is not visible on recognition. Is this the scaling issue?

Topic locked