Segmentation of welding arc images for purposes of welding diagnostics

The paper concerns the research on diagnostics of a welding process. The estimation of the process state is being performed by means of the analysis of infrared images and images recorded within visible range of electromagnetic radiation. To carry out the image analysis it is necessary to cut out the area called region of interests (ROI). In case of welding which is the dynamical process this operation appeared complicated. The most important point of the operation is image segmentation. The author proposed and tested an algorithm of the definition of the ROI as well as verified numerous image segmentation methods.