ParaCountStudio is a program to count cell numbers within an image.ParaCountStudio has been developed to aid biologists needing to count large numbers of cells. It is a computer program written in Java that counts the number of cells that appear in an image, assuming a round cell shape and some degree of cell separation (ie. not tissues). The program has specifically been designed to distinguish red blood cells infected (or not) with malaria and stained with Giemsa, but the program is quite versatile and may work in a variety of other situations.