Caption:
(a) Example image taken from an experimental run at a stirring speed of 1005.2\,rpm with mean temperature $\overline{T}=80.4^\circ$C, 433\,s after reaction begin. Red contour lines highlight the detected particle image perimeter, the calculated area-equivalent particle diameter $d$ is indicated individually for each particle. (b) Unprocessed image of one particle in the image. (c) Processed image of the particle, with the detected perimeter highlighted in red. (d) Processed image of the particle in its bounding box with its area-equivalent circle in black and the minimum and maximum Feret diameter indicated by blue and red lines, respectively.

Notes:
None