Fig. 4
From: Digital reality: a model-based approach to supervised learning from synthetic data
An example of a shallow parametric model. The background is generated from image examples with a texture synthesis approach using exemplar-based inpainting. The crack is generated using a polygonal model. All parameters of the polygon such as step length, angle at each corner, line width and cross-section intensity profile are drawn as random variables from a statistical model. The model was generated by measuring real cracks