This work focuses on the effect of blend ratios and fabric structure on the residual bagging height of knitted fabrics produced from blended rotor yarns using image analysis technique. Simplex lattice design was used to determine the combinations of mixture ratios of the fiber types. Knitted fabrics with three different structures were produced from Viscose/polyester blended rotor yarns. Mixtureprocess crossed regression models with two mixture components and one process variable (tightness factor) were built to predict the residual bagging height.