Abstract In 1986 an empirical test on image matching was initiated by ISPRS WG III/4. The main purpose of the test was to find out the state of the art of image matching procedures applied in the fields of computer vision, pattern recognition and photogrammetry. The paper presents the summarized results of the test analysis. A comparative study of approaches and strategies is performed using different criteria for their classification. To study the precision and reliability of the procedures, the matching results are compared with manual or computational checks. Attention is also focused on the possibilities of the procedures for quality assessment or selfdiagnosis.
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