CountEm is an open source software, freely available under the Creative Commons 4.0 license. It has been developed by Javier González-Villa, Marcos Cruz , Domingo Gómez and Luis Manuel Cruz-Orive at the department of Mathematics, Statistics and Computer Science of the University of Cantabria. The software uses the unbiased counting frame (Gundersen 1977).
CountEm offers efficient and unbiased estimation of the number of particles (people, heads, animals, objects,...) in an image.
CountEm also predicts the standard error of the number estimate. The relative standard error is small, typically 5-10%.
Download CountEm for free and estimate the number of people in a crowd or the population size of a penguin colony, in a few minutes.
If you use CountEm for your work, please refer to this web and cite the corresponding paper from section Publications in your article.
For questions and inquiries read our User Guide and FAQ, and feel free to email us. We are happy to help you using CountEm.
Marcos Cruz
Departamento de Matemáticas, Estadística y Computación
Universidad de Cantabria
marcos.cruz@unican.es