System for real-time objects tracking

A real-time object tracking apparatus is provided to track a moving object using a particle filter in real time without a delay time. A real-time object tracking apparatus includes a memory, a subtracter, a filter, and a particle filter. The memory sequentially stores images of a moving object. The subtracter subtracts a previous frame from a current frame stored in the memory to obtain a subtracted image. The filter removes noise of the subtracted image. The particle filter tracks the moving object using the subtracted image from which the noise is removed. The particle filter distributes particles in the subtracted image and sets the moving direction of the moving object through the distribution density of the particles according to a probability approach in response to a variation in the particle state and a weight given to the particles.