Algorithms of figure distortion in the fabric CAD

Targeting at creating innovative fabric design,algorithms of figure distortion is suggested for two kinds of image distortion—rectangle to sector and rectangle to regular polygon,which have been widely applied in the fabric CAD,i.e.,algorithms of sector distortion based on the proportion and random regular polygon distortion based on the perimeter.And corresponding optimization is carried out.According to the relative geometry position,the former realizes the pixel mapping by utilizing the double linear interpolation and virtual enlargement respectively,and the latter realizes the mapping from outside to inside when the rectangular link and the regular polygon link are used as the mapping units between the source and the target bitmap.The results indicate that these two algorithms have high distortion efficiency and good distortion effect.