Overview

Image makers need to fulfil criteria so they are suitable for tracking otherwise Frame Markers or other type of tracking will need be used.

  • Rich in detail, e.g.,  collages and mixtures of items
  • Good contrast, i.e., bright and dark regions, well-lit
  • No repetitive patterns, 

The resolution of Image tracking is the equivalent of its width being 320 pixels. This is also the minimum image size.

Features

A feature is a sharp, spiked, chiseled detail in the image, such as the ones present in textured objects. The image analyzer represents features as small yellow crosses. 

The following examples show a star rating of their tracking ability. The higher the augmentable rating of an image target, the stronger the detection and tracking ability it contains. 

Feature distribution

The more balanced the distribution of the features in the image, the better the image can be detected and tracked. Consider cropping the image to remove any areas without features.

Avoid repetitive patterns

Although some images contain enough features and good contrast, repetitive patterns hinder detection performance.

Avoid organic shapes

Typically, organic shapes with soft or round details containing blurred or highly compressed aspects do not provide enough detail to be detected and tracked properly or not at all. They suffer from low feature count.

Local contrast

Improve the contrast of the image in general, or choose an image with details that are more “edged.” Organic shapes, round details, blurred, or highly-compressed images often do not provide enough richness in detail to be detected and tracked properly.

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