Techniques for video processing using a topological map are disclosed. Program instructions stored on a computer-readable medium may be executable to receive data indicative of an active area of interest detected within a video frame captured by a detection system, and based upon one or more inclusion criteria, include the active area of interest within a stack of previously identified active areas of interest. The stack may occupy a primary frame within a two-dimensional video space. The instructions may be further executable to update a topological map of the two-dimensional video space based upon the stack, identify within the topological map a two-dimensional region that satisfies a density threshold, and adjust framing of a primary imaging camera based upon the two-dimensional region.