Nowadays multimedia projectors of various types are widely used in many areas of human life. Significant part of all
projector devices are used in two main areas: education (e. g. on lectures) and business (e. g. on all sorts of meetings).
What makes projector a demanded device? It provides a user with high quality full color large diagonal image for a much
lower price than display devices that based on other popular non-projecting technologies. However the absolute majority
of projectors share a significant disadvantage. If human steps into the beam two major negative effects appear: a
distorted image appears on human’s body and human’s eyes become glared by bright light. The first effect is undesirable
by the audience and the second effect is undesirable by the presenter. To avoid the abovementioned effects short throw
projectors can be used but they are more expensive than regular ones and have significant limitations on the placement
spot: usually the lens of a short-throw projector is designed so that it has to be placed on a fixed distance to the screen.
We propose a different solution of similar problem: instead of moving the projector towards the screen let us black out
the human (or other obstacle) from it. To do so our system must know the exact position of human. In this paper we
propose a system with flexible architecture that realizes the above-mentioned solution.