The dataset of the images used in the article: The Role of Shape in Modeling Gloss by Davit Gigilashvili and Akib Jayed Islam
The copyright on these images is owned by the authors Davit Gigilashvili and Akib Jayed Islam. You can feel free to use them for your research purposes as long as a proper reference and acknowledgement is included.
The file names include the information about the material properties that have been used for rendering them.
The files are named in X_ASD_X_X_X.png format, where the first letter means the shape: S for sphere, L for Lucy. And the three numbers after ASD mean alpha, specular reflectance, and diffuse reflectance components of the Ward's model, respectively.
For example: if a file is called L_ASD_0.07_0.099_0.03.png, this means that it is a Lucy shape, with alpha=0.07; specular reflectance=0.099; and diffuse reflectance=0.03.