The application of the computer technology has been widespread in every aspect of industrial and scientific fields including fiber and fabric manufacturing. Especially, the digital image analysis is on the rise, which is the way of picking up the necessary information from an image like picture, painting, etc. This study is on reflective glossiness related to the fabric luster which is one of evaluation parameters necessary for development of high value-added clothes. Luster is an optical and aesthetic factor which can be evaluated by digital image analysis. This paper analyzed reflective glossiness through some image analysis programs and evaluated luster indirectly. Quantifying the reflective glossiness by the digital image analysis makes it easier to compare the luster of silk with that of manmade fabric.