Real-time digital image warping for display distortion correction

This paper describes a digital image warping method which reduces the geometric and optical distortions in several display devices such as wide screen CRTs, Projection TVs and Projectors. The 2-pass scan line warping algorithm is introduced and it effectively reduces the typical type of display distortions such as keystone, pincushion, or barrel types. The proposed warping algorithm also considers the image scaling function and renders arbitrary image scaling up or down with display distortion correction. The proposed architecture is successfully implemented in hardware and operates at the clock speed around 40 similar to 160MHz. Finally, it is successfully adopted in display distortion correction purposes.