Heuristics: intelligent search strategies for computer problem solving
Heuristics: intelligent search strategies for computer problem solving
Gross motion planning—a survey
ACM Computing Surveys (CSUR)
Artificial intelligence: a modern approach
Artificial intelligence: a modern approach
Interference detection among solids and surfaces
Communications of the ACM
Robot Motion Planning
Introduction to Robotics: Mechanics and Control
Introduction to Robotics: Mechanics and Control
A Four-step Camera Calibration Procedure with Implicit Image Correction
CVPR '97 Proceedings of the 1997 Conference on Computer Vision and Pattern Recognition (CVPR '97)
An agent of behaviour architecture for unmanned control of a farming vehicle
Computers and Electronics in Agriculture
Computers and Electronics in Agriculture
Optimal manipulator design for a cucumber harvesting robot
Computers and Electronics in Agriculture
Computers and Electronics in Agriculture
Building a distributed robot garden
IROS'09 Proceedings of the 2009 IEEE/RSJ international conference on Intelligent robots and systems
Integrated gripper and cutter in a mobile robotic system for harvesting greenhouse products
ROBIO'09 Proceedings of the 2009 international conference on Robotics and biomimetics
Intelligent Service Robotics
Indoor robot gardening: design and implementation
Intelligent Service Robotics
A low-cost system to detect bunches of grapes in natural environment from color images
ACIVS'11 Proceedings of the 13th international conference on Advanced concepts for intelligent vision systems
Computer vision for fruit harvesting robots state of the art and challenges ahead
International Journal of Computational Vision and Robotics
Computer Standards & Interfaces
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This paper describes the concept of an autonomous robot for harvesting cucumbers in greenhouses. A description is given of the working environment of the robot and the logistics of harvesting. It is stated that for a 2 ha Dutch nursery, 4 harvesting robots and one docking station are needed during the peak season. Based on these preliminaries, the design specifications of the harvest robot are defined. The main requirement is that a single harvest operation may take at most 10 s. Then, the paper focuses on the individual hardware and software components of the robot. These include, the autonomous vehicle, the manipulator, the end-effector, the two computer vision systems for detection and 3D imaging of the fruit and the environment and, finally, a control scheme that generates collision-free motions for the manipulator during harvesting. The manipulator has seven degrees-of-freedom (DOF). This is sufficient for the harvesting task. The end-effector is designed such that it handles the soft fruit without loss of quality. The thermal cutting device included in the end-effector prevents the spreading of viruses through the greenhouse. The computer vision system is able to detect more than 95% of the cucumbers in a greenhouse. Using geometric models the ripeness of the cucumbers is determined. A motion planner based on the A*-search algorithm assures collision-free eye-hand co-ordination. In autumn 2001 system integration took place and the harvesting robot was tested in a greenhouse. With a success rate of 80%, field tests confirmed the ability of the robot to pick cucumbers without human interference. On average the robot needed 45 s to pick one cucumber. Future research focuses on hardware and software solutions to improve the picking speed and accuracy of the eye-hand co-ordination of the robot.