Chromatic Image Analysis for Cotton Trash and Color Measurements

Abstract

The U.S. cotton classification system has been undergoing significant changes, moving from human classing to the use of precise instruments. Along with this trend, the current research is an effort to develop a new computer vision system to measure detailed trash and color attributes of raw cotton. The system primarily consists of a color ccd camera, xenon flash light, and customized software. In this paper, we introduce a new trash and spot identification method, multidimension thresholding, and the methods for characterizing size, spatial density, shape, and color of trash and spots present in cotton samples. We report on the trash and color measurements of twelve cotton samples, including statistical data and distribution curves, and we compare the results from this system with those from other instruments such as the Spinlab and Motion Control hvi machines and the Minolta Chroma Meter CR-210. Finally, we investigate the influence of trash and spots on cotton color values.

Get full access to this article

View all access options for this article.

References

AATCC, The Technical manual of the American Association of Textile Chemists and Colorists, vol. 65, 1993.

Anthony

W. S.

Mayfield

W. D.

, Cotton Ginners Handbook, USDA, December 1994.

ASTM, Annual Book of ASTM Standards: Textiles-Fibers, Zippers, vol. 33, 1990.

Backe

E. E.

, Cotton Color—Does it really matter?, ITT Report, Institute of Textile Technology, 1987.

Jain

A. K.

, “Fundamentals of Digital Image Processing,” Prentice-Hall, Inc., NJ, 1989.

Jobson

J. D.

, “Applied Multivariate Data Analysis,” Springer-Verlag, NY, 1992.

Krebs

C. J.

, “Ecological Methodology,” Harper & Row, NY, 1989.

Lieberman

M. A.

Zhao

Z. Y.

Bragg

C. K.

, Predicting Gravimeteric Bark Content From Video Images, in “Proc. Cotton Quality Measurement Conference,” 1992, p. 571.

Lieberman

M. A.

, Investigating Trash Shapes in Preparation for Measuring Bark and Grass in Cotton, in “Proc. Cotton Quality Measurement Conference,” 1993, p. 571.

10.

Taylor

R. A.

, Estimating the Size of Cotton Trash with Video Images, Textile Res. J. 60, 185–193 (1990).

11.

Taylor

R. A.

, Video Scan Trashmeter Area Calibration, Textile Res. J. 60, 646–653 (1990).

12.

USDA, The Classification of Cotton, Agriculture Handbook Number 566, Washington D.C., April 1980.

13.

Williams

G. F.

Schleth

, Comparison of Various Trash Measurements, in “Proc. Cotton Quality Measurement Conference,” 1993, pp. 1163–1166.