In this paper the authors focus on detection of wire image quality indicators, which are widely applied in industrial radiography. Two algorithms for IQI detection are proposed. The first algorithm is intended for fast and rough detection of position of IQIs. It is based on evaluation of correlation between the radiographic image of IQI (together with a plastic case) and the fragments of the analyzed radiogram. The second algorithm uses the Radon transform applied to the region of interest (ROI) obtained from the first algorithm to extract the exact position of wires as well as information on visibility of each wire.