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Selective contrast adjustments of text using eye-tracking and augmented reality Disclosure Number: IPCOM000248513D
Publication Date: 2016-Dec-12
Document File: 3 page(s) / 135K

Publishing Venue

The Prior Art Database


This article describes a method of improving the visual experience when reading text in an Augmented Reality (AR) environment. When the user focusses on a piece of text which could be text in the real world or augmented text, the area surrounding the text is visually enhanced in order to optimise the contrast levels. The user's current environment is taken into account when the AR device calculates the colour enhancement.

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Selective contrast adjustments of text using eye-tracking and augmented reality

People with dyslexia or who are affected by visual stress find it physically straining to read text which is optimised for the average person. Unlike colour blinded people, these users are able to distinguish colours correctly, but find the contrast of texts and their backgrounds straining on their eyes e.g. white background with black text. This issue is solved currently by overlaying a coloured plastic sheet over the book or by wearing colour-tinted glasses whilst reading text; both methods alter the hue and contrast of the text and background. These solutions alter the whole field of view of the user, which means that everything will become blue or red-tinted whilst in use. Not only is this inconvenient for the user but this can also cause problems for viewing warning symbols because if the user is wearing red-tinted glasses, white text on red warning symbols will become unreadable. In order to read the sign more clearly, the colours of the sign did not need to be changed but changing the relative contrast between text and background would have helped the user.

As augmented reality and virtual reality technology becomes more prevalent, it will be important to be able to not only accommodate for disabled users but also tailor the display for each user in order to reduce the strain on their eyes. Having optimal, personalised viewing environments are essential for safety as these technologies become more widely applied e.g. in cars mented-reality.

When the user reads text through the view of their augmented reality device, this system will calculate where the text is in the view and selectively augment the contrast and colours of the surrounding area. Using the user's visual profile, it will augment the contrast, colour balance, brightness and hue of the text and important symbols in the output format. This will allow the user to read text more clearly and without the use of tinted glasses or physical coloured overlays.

The system only augments the colours of the areas that the user is focusing on, and therefore reduces the amount of work the augmented reality device has to process. Not only does this save processing power and battery, but it improves the user's experience as only the selected parts of the view are augmented, not the whole view.

This method comprises of five steps: 1. User calibrates the device so the system knows what their optimal

contrast/colour levels are. This will be similar to the test referenced above, but will work out the user's contrast and colour preference, as opposed to finding out their most preferred single colour.

2. User wears the augmented device and focuses on text through the view 3. The eye tracker detects where the user's eyes are focusing and therefore

works out which area they are looking at 4. If the user is reading text (detected using OCR), th...