Digital Image Analysis: Part Ⅰ-Detection Of Color Uniformity In Dyed Textiles

摘要

An image analysis system based on a video camera, personal computer equipped with a black/white frame grabber board, and peripheral monitors and printers was configured to capture the digital images of dyed fabrics. Applying the data acquired by this system, two indices were developed to measure uniformity of color in dyed cotton and wool/cotton textiles. In the case of all cotton dyed with direct dyes, levelness of shade was quantified from the Level Shade Index. In the case of wool/cotton blended fabrics, the ability of pretreated wool/cotton textiles (dyed without tone- on-tone effects) to dye to the one shade was measured from the Union Shade Index. The linear relationship between col-orimetric lightness, L~*, and the grayscale mean of the histogram of the digital image indicated that the mean value, whether high (lighter shade) or low (darker shade) could be used to assess changes in the relative dyeabilities of pretreated wool and cotton fabrics. Image analysis extends the utility of col-orimetry by providing the potential to measure level and union shades.