Powerful image matching technology

LTU technologies’ image matching functionality uses distinct pixel features to analyze visual content and identify matching images between a query image and a reference database.

Use image matching to search and find images that are:

• Exactly the same (e.g. for deduplication)
• Edited in any way (e.g. for tracking on copyright images)
• Photos taken of the same visual content (e.g. for print to mobile applications)

Matching zone – what matched?

The LTU technologies’ image matching functionality includes an optional matching zone parameter. The matching zone highlights exactly where a query image matched with identified images from a reference database. The matching zone details can be represented visually, as coordinates and as a percentage.

The matching zone is typically used:

• To understand where and why two images matched
• As a threshold for disregarding images that matched with less than x%

Configurations for optimized performance

Image matching is highly configurable and applicable to a vast number of different applications that require the functionality of searching and identifying matching images. Image matching can be configured to be optimized with the following options:

• Rotation invariance
• Matching thresholds
• Text removal
• Flip invariance

As an example, the requirement for image matching for ad tracking is very different than that of mobile image matching:

	Ad tracking: strong against transformation such as flipped, cropped and edited images.
	Mobile: robust against glare, perspective and distance.