How the color of an object influences its area measurement by digital imaging

Robert A. Taylor

doi:10.1117/12.144018

12 May 1993 How the color of an object influences its area measurement by digital imaging

Robert A. Taylor

Proceedings Volume 1836, Optics in Agriculture and Forestry; (1993) https://doi.org/10.1117/12.144018
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

Abstract

Images from conventional black and white video systems are being digitized in computers to measure the area of small particles. The method was developed to accurately measure the area of trash in cotton. However, it can be applied to similar area measuring problems. Because a video system exhibits different sensitivities to light at different wavelengths, its output changes as the color of an image changes. Additionally, the spectral distribution of illumination influences the light reflected from objects. Video measurements for the background material were used to set the threshold value needed to identify image pixels associated with trash particles. The effect of particle color on its measured area was demonstrated with painted dots on panels and actual cotton samples.

Citation Download Citation

Robert A. Taylor "How the color of an object influences its area measurement by digital imaging", Proc. SPIE 1836, Optics in Agriculture and Forestry, (12 May 1993); https://doi.org/10.1117/12.144018

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