Zobrazeno 1 - 10
of 61
pro vyhledávání: '"N.D. Tillett"'
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Autor:
N.D. Tillett, T. Hague
Publikováno v:
Biosystems Engineering. 94:487-494
Concerns over the economic and environmental sustainability of farming are leading to an increased interest in techniques to reduce crop protection inputs by better targeting. One way to improve targeting is through physically aligning treatment devi
Publikováno v:
Precision Agriculture. 7:21-32
An approach is described for automatic assessment of crop and weed area in images of widely spaced (0.25 m) cereal crops, captured from a tractor mounted camera. A form of vegetative index, which is invariant over the range of natural daylight illumi
Publikováno v:
Cybernetics and Systems. 35:19-33
This paper addresses the problem of color changes caused by variation in natural illumination, both in intensity and spectral content. Dealing with intensity changes is relatively easy using color ratios, whereas changes in spectral content present m
Publikováno v:
Computers and Electronics in Agriculture. 33:163-177
Despite a general move over the last 20 years towards low volume overall spraying techniques, mechanical weeding using inter-row hoes is still practised by a significant number of UK sugar beet growers. Reasons for this include the control of difficu
Publikováno v:
The International Journal of Robotics Research. 21:75-85
Implementation of an autonomous vehicle for precision treatment of crop plants is described. The navigation system integrates the vision system described in Part I with inertial and odometric sensing. A modular approach is adopted, where the crop gri
Autor:
N.D. Tillett, T. Hague
Publikováno v:
Mechatronics. 11:1-12
A method of locating crop rows in image sequences is described. Unlike several previously reported algorithms, the method does not rely upon the segmentation of plant material from the background on the basis of absolute brightness or colour. Rather,
Publikováno v:
Computers and Electronics in Agriculture. 25:11-28
This paper examines ground based (as opposed to satellite based) sensing methods for vehicle position fixing. Sensors are considered in various categories, motion measurement (odometry, inertial), artificial landmarks (laser positioning, millimetre w
Autor:
N.D. Tillett, T. Hague
Publikováno v:
Journal of Agricultural Engineering Research. 74:225-236
A tractor mounted steerage hoe for cereals has been equipped with a computer-vision-based guidance system. The experimental equipment has been field tested in a crop with an inter-row spacing of 0·22 m at a range of speeds up to 6 km/h. Results show
Publikováno v:
Journal of Agricultural Engineering Research. 69:169-178
The object of the work was to demonstrate individual spot treatment with spray of transplanted cauliflower from a small vehicle that could operate autonomously within a field. The only prior information required was to be the plant spacing, an approx