Here is the MatMix 1.0 interface for a material matching experiment, inspired by audio-mixing desks, consisting of four sliders, a stimulus window (left), and a probe window (right). Four sliders below the probe represent the four canonical material modes, namely matte, velvety, specular, and glittery light, respectively. In order to give purely visual information, we avoided the use of terms like “matte,” “velvet,” and so on in the interface. Instead, we put cropped images (the head parts of the bird images) in front of each slider, representing the material modes.
In a matching experiment, a stimulus image is shown on the left. Observers’ task is then match the material in the probe image to the material in the stimulus, by moving the sliders that adjusting the weights of corresponding material mode.
The interface was developed using the graphic user interfaces features in MATLAB R2014a.
The details of the optical mixing procedure can be found in JoV paper via: Link.
Fan Zhang, Huib de Ridder, Roland W. Fleming, Sylvia Pont; MatMix 1.0: Using optical mixing to probe visual material perception. Journal of Vision 2016;16(6):11. doi: 10.1167/16.6.11.