For recognition, the front or trailing edge of projection of binary image on horizontal axis basically shows linear shape, so least square theory is applied in tilt correction.
Tilt meter is one kind of basic instrument of earth tide and the earthquake research, which includes the horizontal pendulum tilt meter, the water tube tilt meter and the vertical pendulum tilt meter.
倾斜仪是一种研究固体潮和地震的基本仪器，主要有水平摆倾斜仪、水管倾斜仪、垂直摆倾斜仪。
3
For tilted characters only in horizontal direction, even without tilt correction, this method can achieve better segmentation.