NoisyBit

Create a continuous scale of luminance for images through randomly assigning an opacity setting to each pixel in an image. Python code runs in Psychopy version 1.85.2

Based on method outlined by Allard, R., & Faubert, J. (2008). The noisy-bit method for digital displays: Converting a 256 luminance resolution into a continuous resolution. Behavior Research Methods, 40(3), 735-743.

Developed by Rebecca J Hirst and Harriet A Allen (University of Nottingham)

File - A path to image file with four channels (RGB Alpha). (eg. “BlackSquare.png”).

value - float between 0 and 255. - (In this example is set to 100.5)

Code initially expressed via the Psychopy discourse page: https://discourse.psychopy.org/t/dithering-to-measure-contrast-sensitivity/2337/2