This paper makes a proposal for automatically organizing the personal image collection that would be collected from a mobile phone equipped with a digital camera. New devices, such camera, phone camera or camcorder, enable to easily record special events of our life and involve the fastexpanding of multimedia data in everyday life. The purpose is thus to provide users efficient tools to comfortably view and retrieve information in their collection. In the present proposal, collection organization is formulated as an unsupervised classification problem, in both space and time. A criterion and an estimation procedure are proposed, based on the statistical integrated completed likelihood criterion. Then, a hybrid spatio-temporal classification is presented, obtained by fusing the temporal and geolocation-based partitions, providing an easy way to browse the collection along a single axis.