How should I hold the camera?
At what height should I take photo?
A comfortable height for you.
Does the angle affect the reading?
Yes. That is why it is important to take the photo in a way that represents your viewing angle.
What are typical viewing angles?
For standard stairs, between 30o- 50o
For ramps 0o – 30o
Should I zoom the photo?
There is no need to zoom the photo, unless the subject to be measured is very small.
Should I use the flash?
How can Get Luminance assess textured, curved, and uneven coloured surfaces?
The photograph shows what we see, (or not), reflecting conditions experienced by users. It captures shadows, glare and reflections. For example, a curved surface will capture light differently and might be partially shaded. The information in the selected area is analysed, and variations are averaged out to provide a measure of luminance as it is experienced.
Which luminance contrast method should I use?
How much confidence can I have in the results?
Is Get Luminance a photometer?
A photometer can be defined as an instrument for measurement of intensity of visible light, so not strictly, but we can derive photometer readings in CD/m2 if we measure lux levels as well. This was one of the validation methods for the algorithm.
Is Get Luminance a colorimeter?
Does Get Luminance provide an Australian Standard approved methodology?
What does device dependent mean?
Should I include a white test sample to ‘white-correct’?
There is no need to white-correct luminance values.
Do I need professional advice?
Get Luminance can be used to help determine if further advice is needed and is not a substitute for the expertise of built environment professionals, access consultants or specialist testing companies.