Аннотация:The part of modern research is closely connected with stereo technologies. In some cases people need working with complex objects difficult for visual perception. In such cases we need to create the special augmented reality adapted for stereo data. Among the different problems we face is an unfocused stereo data. The goal of the work is a special algorithm for sharpness tracking which can be applied to the real-time instruments. These instruments can increase the convenience of the system and help to control the sharpness. In the current work we formulate the sharpness definition for stereo stream. Parallel to the sharpness tracking problem we resolve the problem of sharpness area detection on the current frame. The proposed algorithm takes in attention the classical sharpness definition for mono images and also the features of human perception of stereo images. The quality realization of the algorithm provides the developing of the instruments for work in the augmented reality in a human-computer interface system. These tools significantly speed up the work with the stereo stream and significantly improve the quality of human perception as a result.