Autodesk 00126-050008-1620A - Autocad 2006 Essentials User Manual page 67

WiseImage – User's Guide
The figure above shows the real (1) and the measured (2) points positions.
The real point of the calibration pair sets the known position of the raster grid
node, and the measured point shows the position of the raster grid node on
the original (distorted) image.
4. Go to the next calibration pair by pressing the
box.
WiseImage pans the image so that the measured point of the next calibration
pair is shown in the screen centre.
To go to the previous calibration pair, press the
dialog box.
5. Repeat steps 3 and 4 for all calibration pairs to specify the measured point's
position.
Transformation method selection
As follows from the table on the page 64, the Grid adaptive bilinear method is
the most appropriate method to correct grid distortions.
From the Calibration Method list, select Grid adaptive bilinear.
- or -
Select Choose automatically from the same list.
To estimate the calibration transformation precision
Click the
The program will find the calculated points' coordinates –the points for the
measured points of all calibration pairs to be moved to, and their position will
be shown with yellow cross marks on the image. Also, the program calculates
the distances between the calculated points and the real points of the
calibration pairs in order to estimate the mean, maximal and minimal
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1 2
button in the Calibration dialog box.
button in Calibration dialog
button in the Calibration