sentences:  However, memory access is less structured than for the two-pass algorithm, which tends to increase the run time in practice.In the last two decades many novel approaches on connected-component labeling have been proposed and almost none of them was compared on the same data.YACCLAB
   (acronym for Yet Another Connected Components Labeling Benchmark) is an example of C++ open source framework which collects, runs, and tests connected-component labeling algorithms.