Image analysis steps used to determine product deformation: (a) original image, (b) simplified image with three color clusters, (c) gray-scale image after removing
non-product color clusters and (d) product contour. Image corresponds to an equilibrium-dried potato strip at 50 C (440 min). Initial contour shape is a square. (For
interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)