Technology of classification on fruit defects based on infrared thermography

Jianmin Zhou; Qixian Zhou

doi:10.1117/12.863819

11 October 2010 Technology of classification on fruit defects based on infrared thermography

Jianmin Zhou, Qixian Zhou

Proceedings Volume 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 76561V (2010) https://doi.org/10.1117/12.863819
Event: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2010, Dalian, China

Abstract

Bruise, scratch, decay and insect pest are the most common defects in thin skin fruits. To detect these defects with the use of infrared thermography, the mathematic model of spherical shaped fruits based on heat transfer theory is developed and a further classification research is carried out. By using a commercial infrared thermal imaging camera, the radiation temperature on the fruit surface of various defect tissues can be observed after thermal excitation. Both model and experimental studies reveal that the cooling rate of specimen is related to the fruit thermal properties and fruit size, and the logarithmic temperature is directly proportional to detection time. Bruise has a steeper cooling slope than other defects and sound tissue, while insect pest performs poor during the fruit cooling range from 29 ^oC to 24 ^oC, this may be related to their more cracked wax layer and higher amount of lenticels.

Citation Download Citation

Jianmin Zhou and Qixian Zhou "Technology of classification on fruit defects based on infrared thermography", Proc. SPIE 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 76561V (11 October 2010); https://doi.org/10.1117/12.863819

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available