The proposed algorithm can be divided into five sections,which are vertical edge detection,edge statistical analysis,candidate regions location,candidate regions filtration,tilt correction.

A tilt correction method based on image moments was introduced in this paper.

License plate tilt correction base on SOM;

An algorithm for vehicle license plate tilt correction base on singular value decomposition;

Vehicle license plate tilt correction approach based on K-L expansion;

In order to implement the skew correction of images in the anti-false and auto-checking system for railway ticket,a method of the skew correction is proposed based on Hough transform.

Since most previous image skew correction algorithms for microarray were time-consuming,a fast skew correction algorithm was proposed based on Cellular Neural Networks(CNN).

This thesis studies the automatic processing methods of microarray images,including four parts:skew correction,gridding,image segmentation and extraction.

In accordance with the correction of deck tilting for rate fire control system,the paper puts forward two instances of deck tilting correction to be needed,and deduces their calculation method.

License plate slant correction method based on least square and principal component analysis;

Aiming at the characteristics of shoe sloes,a kind of slant correction algorithm is put forward.

In this paper ,slant correction methods of vehicle license plate are analyzed and an approach based on color pair and principal component analysis is prestented.