Based on the curvature, the point cloud data is divided into many segments, and then the MLS line fitting is used to smooth the segments.

The slope standard error and correlation coefficient of zero-crossing linear fitting;

Analysis for linear fitting results in the experiment of relative pressure coefficient

Using linear fitting technique,a non-contact realtime measurement system based on reticle is established and subpixel detecting method is abandoned in this paper.

The edge detection method with straight line fitting in digital image processing has been introduced in detail in this paper, and it has been applied into the development of high precision one-dimension photoelectric autocollimator.

By contrasting some conventional Gamma correction methods and comparing the merits and demerits of Gamma correction for both analog and digital circuits,a new correction method by combining lookup table and straight line fitting is put forward here.

The Sobel operator is used to extract the iris edge,and then an algorithm,which combines scan line searching with line fitting,is applied to determine the iris center and its size roughly,finally,an improved Daugman operator is used to locate the iris edge pre.

In the light of the question of the relation between the sensor s linearity and fitting straight line, this paper builds mathematical model.

Algorithm of Document Skew Detection Based on Straight-line Fitting;

The vectorizing uses straight-line fitting m ethod.

Finally, by adopting straight-line fitting technique, the location of ROI of knuckleprint in original image is accurately located.