The assessment of drugs for cancer treatment is an important task to combat these diseases. A possible way is to analyze histology images of tumors, which look as shown in the figure. Image analysis is necessary to judge whether the drug treatment has significantly reduced the tumor proliferation. The two most important elements are the cell and vascular densities. This project consists of developping an ImageJ plugin that assists into the classification of tumor histology images. The first part is the measurement of the density of the cells, which appear as blue dots. Secondly, the method also needs to take into consideration the texture of the brown background which originates from blood vains.