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LTU engine/ON demand is a hosted software platform that provides access to LTU technologies’ comprehensive image recognition functionalities. The LTU engine/ON demand platform is highly flexible and is designed to adjust and scale with changing demands.

A single account for LTU engine/ON demand can be used to add image recognition functionality to multiple applications.

The LTU engine/ON demand Administrative Console is accessed via. URL:
See the Administrative Interface section below.

LTU engine/ON demand has the same Administrative Interface as the licensed version of LTU software: LTU engine/server. Some aspects unique to LTU engine/ON demand found in comments marked with this symbol: :!:

JSON API: the JSON API is the recommended API for new applications. The licensed version of LTU engine includes the JSON API, which facilitates the porting of applications from LTU engine/ON demand to LTU engine/server. Query examples in the JSON API documentation generally reference LTU engine/server. :!: LTU engine/ON demand users will know to adjust the query examples to the proper /ON demand references.

SOAP API: SOAP was the API available in the intitial versions LTU engine/ON demand. Its documentation is available on this link:

Below is a quick checklist to help prepare for the integration of LTU engine/ON demand.

  • Signature type - What feature(s) needed? (similarity, matching, color)
  • Storage
    • Estimate the number of images that will be included for the application
    • Estimate the image volume changes per month on this application
  • Search
    • Estimate number of searches per month
  • Development
    • List the public IP addresses of all machines that will make direct calls to the API interface.
    • Launch sample code provided by LTU technologies to check that everything works
    • Start development and unit test
    • Validate (pay attention at the refresh delay per application)
    • Empty the database and start loading content for the application
  • Production
    • Monitor the number of queries per month (also available on the LTU engine/ON demand administrative console)
    • Continuously evaluate the capacity used monthly in terms of queries and image database volume