Automated Mobile System for Accurate Outdoor Tree Crop Enumeration Using an Uncalibrated Camera
AbstractThis paper demonstrates an automated computer vision system for outdoor tree crop enumeration in a seedling nursery. The complete system incorporates both hardware components (including an embedded microcontroller, an odometry encoder, and an uncalibrated digital color camera) and software algorithms (including microcontroller algorithms and the proposed algorithm for tree crop enumeration) required to obtain robust performance in a natural outdoor environment. The enumeration system uses a three-step image analysis process based upon: (1) an orthographic plant projection method integrating a perspective transform with automatic parameter estimation; (2) a plant counting method based on projection histograms; and (3) a double-counting avoidance method based on a homography transform. Experimental results demonstrate the ability to count large numbers of plants automatically with no human effort. Results show that, for tree seedlings having a height up to 40 cm and a within-row tree spacing of approximately 10 cm, the algorithms successfully estimated the number of plants with an average accuracy of 95.2% for trees within a single image and 98% for counting of the whole plant population in a large sequence of images. View Full-Text
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Nguyen, T.T.; Slaughter, D.C.; Hanson, B.D.; Barber, A.; Freitas, A.; Robles, D.; Whelan, E. Automated Mobile System for Accurate Outdoor Tree Crop Enumeration Using an Uncalibrated Camera. Sensors 2015, 15, 18427-18442.
Nguyen TT, Slaughter DC, Hanson BD, Barber A, Freitas A, Robles D, Whelan E. Automated Mobile System for Accurate Outdoor Tree Crop Enumeration Using an Uncalibrated Camera. Sensors. 2015; 15(8):18427-18442.Chicago/Turabian Style
Nguyen, Thuy T.; Slaughter, David C.; Hanson, Bradley D.; Barber, Andrew; Freitas, Amy; Robles, Daniel; Whelan, Erin. 2015. "Automated Mobile System for Accurate Outdoor Tree Crop Enumeration Using an Uncalibrated Camera." Sensors 15, no. 8: 18427-18442.