Featured Research

from universities, journals, and other organizations

Sugar-cane Fields Observed By Satellite

Date:
May 19, 2009
Source:
Cemagref
Summary:
An automatic analysis method for real-time monitoring of sugar-cane harvesting has been developed. The goal is to design a true decision-aid tool based on the expert knowledge available in the sugar-cane industry, that can also be adapted to other fields such as wine growing and forestry.

An automatic analysis method for real-time monitoring of sugar-cane harvesting has been developed in Montpellier in the framework of a thesis co-directed by Cemagref and Cirad. The goal is to design a true decision-aid tool based on the expert knowledge available in the sugar-cane industry, that can also be adapted to other fields such as wine growing and forestry.

On the island of Réunion, sugar cane, a tall grass, covers over 25 400 hectares. The harvest period can span six months of the year. However, once the cane has been cut, it must be processed in a factory within 48 hours, otherwise decomposition hinders the industrial crystallisation process, among others. Because the factories operate with zero stock and at constant output levels, the companies increasingly use data supplied by satellite-image experts to estimate the progress of harvests on the island.

Question of logic

The goal of the SUCRETTE programme managed by CIRAD is to develop remote-sensing methods and products to meet the needs of the sugar-cane industry. With that in mind, Mahmoud El Hajj developed an automatic analysis method for satellite-image time series implementing the expert knowledge. He used the FisPro software, developed in 2000 by Cemagref and INRA, that can be used to build computer systems based on fuzzy logic. Whereas binary logic uses only 0 and 1, fuzzy logic is capable of grasping the nuances between the two and thus achieve great flexibility. In addition, by assigning linguistic labels to the different numerical values, fuzzy logic can produce rules similar to those used in human thought. As a result, it is possible to create true decision-aid tools whose design is based on human knowledge.

Models to fill in missing links

Another original aspect of the work carried out by the young researcher is a crop-growth model integrating biophysical, climate and agronomic parameters. It is thus possible to estimate the growth of the sugar cane in spite of any missing data in the satellite images. Large cumulonimbus clouds that mask large stretches of terrain and reduce the value of satellite images are no longer a problem. Because sugar-cane growth is rapid, the model is also designed to determine the probability of harvesting having taken place between two images taken at an interval of two or three months. This is useful because, seen from space, a fully grown field ready to be harvested is indistinguishable from a field with new growth, two months after the harvest.

Toward an operational tool

By combining data from satellite-image time series, crop-growth models and expert knowledge, this new method will, in time, make it possible to design a true decision-aid tool. Whereas standard image analysis requires several days of work by an expert, the new tool needs just a few hours to process all sugar-cane fields throughout Réunion. The only element missing today is a graphical interface to facilitate use by an engineering firm.

In the future, it will be possible to expand the method for real-time monitoring of dynamic processes in all types of agricultural and forestry land cover.

Focus on FisPro

The FisPro software serves to build fuzzy-inference systems and then use them to process data, in particular for simulation of physical or biological systems.

The software was developed by Cemagref and INRA for a technology-transfer project funded by the Languedoc-Roussillon region in France, with an industrial partner, the "La Malepère" wine company in Arzens (Aude department, France).

FisPro is available at no cost and may be freely downloaded from http://www.inra.fr/Internet/Departements/MIA/M/fispro/indexfr.html


Story Source:

The above story is based on materials provided by Cemagref. Note: Materials may be edited for content and length.


Cite This Page:

Cemagref. "Sugar-cane Fields Observed By Satellite." ScienceDaily. ScienceDaily, 19 May 2009. <www.sciencedaily.com/releases/2009/05/090519152616.htm>.
Cemagref. (2009, May 19). Sugar-cane Fields Observed By Satellite. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2009/05/090519152616.htm
Cemagref. "Sugar-cane Fields Observed By Satellite." ScienceDaily. www.sciencedaily.com/releases/2009/05/090519152616.htm (accessed October 21, 2014).

Share This



More Plants & Animals News

Tuesday, October 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Cadaver Dogs Aid Search for More Victims of Suspected Indiana Serial Killer

Cadaver Dogs Aid Search for More Victims of Suspected Indiana Serial Killer

Reuters - US Online Video (Oct. 21, 2014) — Police in Gary, Indiana are using cadaver dogs to search for more victims after a suspected serial killer confessed to killing at least seven women. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
White Lion Cubs Unveiled to the Public

White Lion Cubs Unveiled to the Public

Reuters - Light News Video Online (Oct. 21, 2014) — Visitors to Belgrade zoo meet a pair of three-week-old lion cubs for the first time. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
'Cadaver Dog' Sniffs out Human Remains

'Cadaver Dog' Sniffs out Human Remains

AP (Oct. 21, 2014) — Where's a body buried? Buster's nose can often tell you. He's a cadaver dog, specially trained to find human remains and increasingly being used by law enforcement and accepted in courts. These dogs are helping solve even decades-old mysteries. (Oct. 21) Video provided by AP
Powered by NewsLook.com
White Lion Cubs Born in Belgrade Zoo

White Lion Cubs Born in Belgrade Zoo

AFP (Oct. 20, 2014) — Two white lion cubs, an extremely rare subspecies of the African lion, were recently born at Belgrade Zoo. They are being bottle fed by zoo keepers after they were rejected by their mother after birth. Duration: 00:42 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins