Autodesk 05726-091452-9060 User Guide - Page 67

WiseImage - User's Guide 1 2 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 button in Calibration dialog 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 button in the Calibration 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 button in the Calibration dialog box. 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 68