Abstract
Trash particles enmeshed in bulk cotton fiber samples interfere with conventional cotton color measurementaccuracy. A new instrument was designed and constructed for reducing trash effects on cotton color measurement, whilemaintaining the traditional system of cotton color measurement. The instruments illumination system included fourquartz-tungsten-halogen lamps in aluminum elliptical reflectors. The instruments sensor was a panchromatic video camerathat acquired images through optical color filters on a rotating wheel. The sensitivities of the various measurements wererigorously considered to maximize the dynamic range over which each measurement was made. The systems camera wasconnected to a computer through a frame grabber. Software was written to control the filter wheel, image acquisition,color/trash computations, and data recording. Image processing was employed to differentiate trash particles from cotton inthe images. Color was calculated from the image portion judged by image analysis to be cotton. The system was tested ona large number of cotton samples and performed as designed and without any software or hardware failures.
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