In high mountain environment, changing boundary conditions from climate change such as melting glaciers and permafrost retreat influence the stability of alpine soil and rock slopes. Slope deformation processes are complex and a sound understanding is a prerequisite to investigate the impact of changing climatic conditions and to predict the future behaviour as well as to develop safety measures. The thesis aims to exploit all information about landslide deformation behaviour and landslide processes from imagery and laser scanning data which are required to understand past and present landslide evolution. Already existing and new deformation analyses methods are applied, improved and developed with the aim to i) analyse the retrospective landslide development over a longer time period and ii) to analyse the current landslide behaviour by appropriate and ongoing monitoring methods. Laser scanning and imagery data are well suited for this task because the data is available in national, federal and local archives of most Alpine countries and the sensors are applicable for the monitoring campaigns in rough mountain environment with no direct access to infrastructure. In the frame of this study, two active high alpine deep-seated compound rock slides and an active rock glacier were investigated. The three study sites are located in the Eastern Alps, Austria, and differ in their topography as well as process characteristics. For process and deformation analyses, the data from airborne and imaging campaigns was collected and field campaigns with terrestrial laser scanning and UAV were performed. The data from different sources were pre-processed to a geo-referenced point cloud, respectively to a geo-referenced ortho-image and then compiled into a common coordinate reference system. Slope deformation processes with a destruction of the surface, e.g. due to rock fall, were analysed by means of a robust 3D distance measurement approach for point cloud data. Slope processes with en-block displacements (e.g. slides) were analysed by applying an image correlation and breakline tracking technique. The derived distance change and displacement maps, together with information from field surveys and terrestrial photographs, were used for interpretation. This includes i) the identification of different landslide processes (i.e. rock and soil slide displacements, rock fall, rock avalanches, rock glacier creep, debris slides etc.), ii) the delineation of different slabs (rock slide) or zones (rock glacier) and analyses of their activity, geometry and kinematics and iii) the interpretation of the failure mechanism (e.g. toppling or rotational sliding behaviour). The extracted information was used to develop a geological model of the slope deformation. The analyses show that both rock slides are composed of different slabs with different spatial and temporal deformation behaviour. For the ice contacted rock slide, the glacier retreat was reconstructed since the 1950s based on imagery, laser scanning data and historic topographic maps. The results show a correlation between glacier retreat and rock slide activity. The rock glacier deformation behaviour was reconstructed since the 1970s and showed an increase in creep velocity since the end of the last century. The results derived with the methods and workflows developed in this thesis focusing on the kinematics and the geometry of the landslides could serve as input to study the impact of permafrost degradation and glacier retreat on landslides (e.g. by numerical modelling). The results are further an essential contribution to assess the risk in the context of infrastructure, to design safety measures, and to predict the future deformation development.