Point data reduction technique in reverse engineering;

In order to increase calculation speed of reconstruction, reduce memory space, and, at the same time, emphasize modelling characteristics, a method of data reduction with triangular folding was proposed by using triangular meshes model and ordering function on the basis of analysis of data reduction method available.

In order to reduce the data point-cloud of auto panel die’s surface acquired by non-contact 3D measurement, a kind of data reduction method is presented based on the average point-to-point distance principle.

Under circumstance,which there are a few accuracy data and a lot of prior information(data)in study area when interpolation during scientific visualization,this paper presents prior information residual kriging based on Linear kriging.

Analysis on data precision and influential factors of experiments at high incidence;

The techniques of measuring data quality includes: evaluating data precision, establishing inter-rater reliability,aggregating statistics and statistical process control charts, cross checking between referential data, checking the format of lab reports, checking among relevant documents and data, comparing bet.

The Southwell zonal wavefront reconstruction model was applied to some terms of Zernike polynomials by numeric simulation, and the error caused by data precision of wavefront reconstruction matrix is studied.

The process of software refinement include data refinement and process refinement.

This paper presents an improved data refinement proof rules.