There is provided mechanisms for region of interest classifying a region. The region is represented by haptic data and visual data. The method is performed by a controller. The method comprises obtaining the haptic data and the visual data of the region. The method comprises quality rating the haptic data in at least part of the region based on at least one property of the haptic data and with respect to the visual data in the at least part of the region. The method comprises defining at least one region of interest in the region by modifying at least one of the haptic data and the visual data of the at least part of the region according to the quality rating of the haptic data, thereby region of interest classifying the region.