With the purpose of objective evaluation of froth layer Outotec developed the FrothMaster videosystem that determines velocity of froth layer removal to a concentrate launder, its stability, size of bubbles in froth layer and their colour tones. FrothMaster videosystem information in a digital form ensures development of a program algorithm basis for computerised flotation process control. A concept of rough flotation circuit control using FrothMaster videosystem without Courier data is given.