Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

‘Brain’ developed for low-cost PC-based grading of tomatoes and eggs

03.04.2009
Multi-awarded computer scientist Prof. Jaderick Pabico of the University of the Philippines Los Baños has developed a computational model that can operate a cheap computer-based system to grade agricultural produce such as tomatoes and eggs.

GRADES ARE IMPORTANT

In most countries, including the Philippines, many agricultural products are still graded using a standard criterion. In tomatoes, color is used to determine ripeness; in eggs, the shells are inspected for defects.

The color of tomato and the shell quality of eggs affect consumers’ purchasing habits, hence, dictate the price of the product. Accurate grading is therefore critical for enterprises.

The problem with visual inspection of tomatoes and eggs, however, is that of accuracy over time. “Because manual grading is labor-intensive, workers will naturally grow tired and bored— thus increasing the chances for errors, especially after they have worked for a few hours without break,” explained Prof. Pabico.

SOLUTION: AUTOMATE THE GRADING

Although several ways of automated grading of agricultural products have been developed abroad, the systems are costly and would only work in controlled farm environments. The Philippines needed something for its small farms.

Prof. Pabico’s model provides an affordable alternative. He came up with it by setting up machine vision systems (MVS) – two computers equipped each with a web camera. The first MVS will be used for grading tomatoes while the second, for eggs.

The camera serves as the “eye” of the MVS that senses and captures images of the tomatoes or eggs, while the computer runs the “brain” of the MVS, which determines the grade of the produce.

CREATING THE BRAIN

Prof. Pabico said that building the MVSs is the easy part. It is creating and optimizing the brains for each system that took time.

“We took the first MVS set to a commercial tomato farm in Tagaytay City and took 6,000 pictures of freshly harvested tomatoes using the web camera. The other unit we used to capture 750 images of harvested eggs from a backyard poultry raiser in Sariaya, Quezon,” Prof. Pabico recounted.

The images of the tomatoes and eggs were then prepared for ‘feeding’ into the respective brains—an artificial neural network (ANN). The process involved extracting the image of the product from its background using what is called an edge algorithm, extracting the red/green/blue spectral patterns of the product, and normalization of the patterns. The normalized patterns were used to ‘train’ the MVSs to grade the tomatoes and eggs.

After running tests, the computers determined whether the tomatoes where in the Green, Breakers, Turning, Pink, Light Red, and Red stages and whether the eggs are acceptable or rejects.

BRAIN WINS AGAINST BRAWN

After measuring performances of both human graders and the ANN in classifying eggs, Prof. Pabico found that the ANN posted a grading performance of 76%; humans posted 73%. ANN also did the job of classifying tomatoes better, recording an accuracy of 97% against the humans’ 93%.

In addition, the average accuracy of the human tomato and egg graders declined over an eight-hour work shift. Human accuracy was found to go up again after 15-minute snack breaks and after lunch, but the performance increase was not enough to bring the accuracy back to original levels.

The ANNs developed in this research may be used as a potent classifier for MVSs for tomato maturity classification and egg grading,” said Prof. Pabico.

ANOTHER BRIGHT IDEA

“Later on we hope to look into the rate of grading of both humans and the MVS by hooking up the MVS to a conveyor belt. We can then look for ways to speed up image acquisition and processing, as well as the analysis by the ANN and its data output on screen,” he added.

“With current advances in ANN research, it may be soon possible to grade agricultural produce using a group of ANNs that will analyze objects simultaneously. This would increase accuracy even more,” he concluded.

Florante A. Cruz | Research asia research news
Further information:
http://rdenews.uplb.edu.ph
http://www.researchsea.com

More articles from Information Technology:

nachricht Controlling robots with brainwaves and hand gestures
20.06.2018 | Massachusetts Institute of Technology, CSAIL

nachricht Innovative autonomous system for identifying schools of fish
20.06.2018 | IMDEA Networks Institute

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Temperature-controlled fiber-optic light source with liquid core

In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.

Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...

Im Focus: Overdosing on Calcium

Nano crystals impact stem cell fate during bone formation

Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

Im Focus: Sharp images with flexible fibers

An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.

Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

Upcycling of PET Bottles: New Ideas for Resource Cycles in Germany

25.06.2018 | Ecology, The Environment and Conservation

Graphene assembled film shows higher thermal conductivity than graphite film

22.06.2018 | Materials Sciences

Fast rising bedrock below West Antarctica reveals an extremely fluid Earth mantle

22.06.2018 | Earth Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>