The invention relates to a moisture and oxygen stable composition comprising inert core particles and a partial or complete coating thereon of at least one active compound encapsulated in a carbohydrate matrix, which matrix is characterized by: 5 to 95 wt. A mask composed of an upper mask and a lower mask is superimposed on the image. The output selection block merges the decision signals as a final decision signal or sequentially outputs the decision signals as the final decision signal, in response to an output mode selection signal.