Autodesk AUTOCAD 2006, Справочник по командам, Страница: 1207 / 1490

The RMS (root mean square) error reported after calibration measures how
close the program has come to making a perfect fit. Affine should be used
if the RMS is small.
Projective
Specifies a transformation equivalent to a perspective projection of one
plane in space onto another plane with four calibration points. A projective
transformation provides a limited form of what cartographers call rubber
sheeting, in which different portions of the tablet surface are stretched by
varying amounts. Straight lines map into straight lines. Parallel lines do not
necessarily stay parallel.
Projective transformation corrects parallel lines that appear to converge.
Repeat Table
Redisplays the computed table, which rates the transformation types.
Transformation Table
Reports the number of calibration points and provides information about
each transformation type.
Outcome of Fit
Reports the outcome of fit for each of the transformation types. If the outcome
of fit is not Success or Exact for any of the transformation types, the program
reports failure of the entire calibration process and ends the command. The
remaining entries in each column are blank unless Outcome of Fit is Success.
Exact
Indicates the correct number of points for a valid transformation.
Success
Indicates more than enough points. The program succeeded in fitting a
transformation to the data.
Impossible
Indicates not enough points.
Failure
Indicates enough points, but the program was unable to fit a transformation
to the points, usually because some points were colinear or coincident.
New and Modify Table Style Dialog Boxes | 1183