Table 1.

Overview of the findings for training and test data used in the reviewed papers. The table shows the absolute and relative number of papers that use experimental data for testing or for training.

Problem	Exp. test data	Exp. train data
Acoustic inverse problem	10 (43%)	1 (4%)
Image post-processing	23 (79%)	14 (48%)
Optical inverse problem	1 (33%)	1 (33%)
Semantic image annotation	14 (54%)	11 (42%)