|
| BP neural network prediction of rape maturitybased on pod hue H value |
| |
| DOI： |
|
| Hits: 1376 |
| Download times: 533 |
| Abstract: |
| In order to solve the problem that the proper time of harvesting is difficult to determine in the
current process of rape combine harvester，this paper carried out prediction studies of digital coloring in rape
pod RGB（red，green and blue）and the grade of maturity. Through manipulation RGB value in effective pixel
points that were collected from picture，thus the hue H value of rape pod after 1-14 days of rape emergence was
obtained. Taking the pod hue H value of 1-12 days after rape emergence as training data set，taking the pod hue
H value of 13，14 days after rape emergence as validation data set，using MATLAB software，the mathematical
model between the rape pod hue H value and the number of growth days after 204 days of rape emergence was
established，taking use of the pod hue H value，the judgment of rape pod maturity was achieved. The rape maturity
model was established based on BP neural network and the equation result was verified through the later test.
Results showed that rape pod hue H value increased with the day increasing. The predictive rape pod epidermal H
value in the 13th，14th day were 64.4640，64.4723，while 64.4296，64.4307 respectively as the actual value，with
the difference of 0.053% and 0.065%. The test predictive value was consistent with the actual value of measurement
result. Rape maturity was delineated according to the rape pod hue H value. Green mature rape pod hue H value
was 64.00-64.19，yellow rape pod hue H value was 64.20-64.39，ripe rape pod hue H value was 64.40-64.49，as
the classification criterion of rape maturity. |
|
View Full Text
View/Add Comment Download reader |
