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We propose a visual recognition system for robotic applications in which distance to the visual objects can change a lot (for instance, trying to recognize a distant object learned from a short distance). Our system takes advantage of a single pan-tilt camera controllable in zoom and focus. Focus control allows to detect plans of sharpness in the scene and indirectly to compute a distance. Hence,...
Imitating the facial expressions of another person is a meaningful signal within interpersonal communication. Providing a robot with the capability of imitating the face of an interactant marks a first step towards implementing a communication model of mimicry. In this paper, we present a novel approach to facial expression imitation which does not require observed expressions to be assigned to a...
This paper presents a modular software architecture based on a stereo camera system that makes real-time 3D perception, interaction and navigation for small humanoid robots possible. The hardware-independent architecture can be used for several purposes, like 3D visualisation, object recognition, self-localization, collision avoidance, etc. First of all, the intrinsic calibration parameters of the...
To meet the demands of game and entertainment, autonomous humanoid robot HIT-2 is designed. Firstly, system structure of the robot is introduced. Then methods of image processing and algorithms for localization based on embedded vision system are presented. Finally, motion planning for penalty kick is carried out by the method of motion control combined with selective joints control.
The TI DSP (TMS320DM642 EVM) is used as the computation platform in our catcher robot system with two CCDs as source of the stereo vision. The system will separate the thrown-in target from the paired images and then calculate the centroid coordinates of each target image, thereby determining the space location of the object. The Lagrange interpolation formula and the linear function X = a Z + b are...
This paper presents an academic prototype small humanoid robot with vision-system to achieving the posture estimation. With the on-board personal digital assistant (PDA) to in charge of the image processing and then recognize its surroundings. According to the information of the image data from the PDA-based real-time image sensor, the Nios-based motor control chip is employed to achieve the desired...
When dealing with humanoid vision, it is very important to take into account the velocity and complexity of the algorithms. This paper presents an efficient combination of basic algorithm with quadratic complexity. Our real time procedure gives an excellent representation of the 3D scene. This 3D reconstruction allows the humanoid to maneuver, as well as the robotic manipulation of objects.
Learning object representations by exploration is of great importance for cognitive robots that need to learn about their environment without external help. In this paper we present sensorimotor processes that enable the robot to observe grasped objects from all relevant viewpoints, which makes it possible to learn viewpoint independent object representations. Taking control of the object allows the...
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