数控插补程序，直线插补和圆弧插补，1．直线插补：逐点比较法插补；2． 圆弧插补：DDA法插补第一、二象限的逆圆弧。 -NC interpolation procedures, linear interpolation and circular interpolation, 1. Linear interpolation : a case-by-point comparison interpolation; 2. Circular interpolation : DDA interpolati

Skew detection and correction is very important task before pre-processing of an image and it is a major problem in scanned documents, if it not detected correctly it will lead wrong result in future during image analysis. During the scanning of th