Source: AGRICULTURAL RESEARCH SERVICE submitted to NRP
IMAGING SPECTROSCOPY FOR DETERMINING THE OPTICAL PROPERTIES OF APPLE FRUIT
Sponsoring Institution
Agricultural Research Service/USDA
Project Status
ACTIVE
Funding Source
USDA INHOUSE
Reporting Frequency
Annual
Accession No.
0405762
Grant No.
(N/A)
Cumulative Award Amt.
(N/A)
Proposal No.
(N/A)
Multistate No.
(N/A)
Project Start Date
Sep 15, 2002
Project End Date
Sep 14, 2005
Grant Year
(N/A)
Program Code
[(N/A)]- (N/A)
Recipient Organization
AGRICULTURAL RESEARCH SERVICE
(N/A)
EAST LANSING,MI 48824
Performing Department
(N/A)
Non Technical Summary
(N/A)
Animal Health Component
30%
Research Effort Categories
Basic
70%
Applied
30%
Developmental
0%
Classification

Knowledge Area (KA)Subject of Investigation (SOI)Field of Science (FOS)Percent
4021110202070%
5031110202030%
Knowledge Area
503 - Quality Maintenance in Storing and Marketing Food Products; 402 - Engineering Systems and Equipment;

Subject Of Investigation
1110 - Apple;

Field Of Science
2020 - Engineering;
Goals / Objectives
Investigate a novel optical sensing technique for determining the absorption and scattering properties of apple fruit. Develop mathematical methods and computer algorithms for extracting the absorption and scattering coefficients from hyperspectral images of apple fruit in the visible and near-infrared region. Develop simulation models to study light scattering and absorption in apple fruit and their relationship with fruit firmness and sugar content.
Project Methods
Imaging spectroscopy will be used to acquire hyperspectral images from apple fruit in the visible and near-infrared region. Diffusion equation based on theory of multiple light scattering will be applied to determine the absorption and scattering coefficients from the hyperspectral image data of apple fruit. Finite element and/or Monte Carlo simulation methods will used to develop simulation models to study light scattering and absorption in apple fruit.

Progress 10/01/04 to 09/30/05

Outputs
4d Progress report. This report serves to document research being conducted under a trust fund agreement between ARS and USDA Cooperative State Research, Education, and Extension Service (CSREES). Additional details of research can be found in the report for the parent project 3635-43000-004-00D Technologies for Assessing and Grading Quality and Condition of Cucumbers and Tree Fruits. The objective of this research is to develop an imaging spectroscopy technique for determining the optical properties of apple fruit, quantify light absorption and scattering in the fruit, and relate them to fruit quality attributes such as firmness and soluble solids content. Experiments were performed on simulation turbid samples with known optical properties that were similar to those of apples to validate the technique for determining absorption and scattering properties. Two methods, i.e., analytical and numerical, for determining absorption and scattering coefficients were compared. The analytical model yielded about the same results as those from the numerical method, but it was much simpler to implement. The scattering properties of the turbid samples were determined accurately; however, improvements in the determination of absorption properties are still needed.

Impacts
(N/A)

Publications


    Progress 10/01/03 to 09/30/04

    Outputs
    4. What were the most significant accomplishments this past year? D. Progress Report. This report serves to document research conducted under a trust fund agreement between ARS and USDA Cooperative State Research, Education, and Extension Service (CSREES). Additional details of research can be found in the report for the parent project 3635-43000-003-00D Development of Nondestructive Sensing Technologies to Assess Postharvest Quality of Deciduous Tree Fruits. The objective of this research is to develop an imaging spectroscopy technique for determining the optical properties of apple fruit, quantify light absorption and scattering in fruit tissue, and relate them to fruit quality attributes such as firmness and soluble solids content (SSC). An imaging spectroscopy system has been set up and tested. Experiments were performed on measuring light scattering from phantom samples to evaluate the performance of the imaging spectroscopy system for measuring optical properties. Preliminary Monte Carlo simulations were performed for determining the optical properties of phantom samples. Hyperspectral scattering was measured from apple fruit and related to fruit firmness and SSC. One manuscript was written and submitted for journal publication.

    Impacts
    (N/A)

    Publications