REliable PIcking by Consensus (REPIC) is a consensus methodology for harnessing multiple cryogenic-electron microscopy (cryo-EM) particle picking algorithms. It identifies particles common to multiple picked particle sets (i.e., consensus particles) using graph theory and integer linear programming (ILP). Picked particle sets may be found by a human specialist (manual), template matching, mathematical function (e.g., RELION's Laplacian-of-Gaussian auto-picking), or machine-learning method.