Establish Ellipse of GDV-Gram and Correction

ESTABLISH THE CENTER AND INNER ELLIPSE OF THE GDV-GRAM & MAKING CORRECTION

Corrections are made only in case of a wrong established centre and ellipse of the GDV-gram. Slight shift of the cross from the centre doesn't influence an image.

Fig.3. Correction of the GDV-gram centre

Correction of the centre (fig.3)
Correct the centre of the GDV-gram. For this, with the pressed left mouse button "capture" the centre of the cross and adjust it to the centre of the GDV-image. To enlarge the picture for more careful corrections click twice with the left mouse button on the GDV-image (fig.4). To change the angle of the axes relatively to the GDV-gram centre use Angle buttons. The image centre "captured" by the mouse can be shifted. It is necessary, if the finger has been positioned incorrectly. OK and Cancel buttons - agreement with the performed operation or refuse from it.

Fig.4. Manual correction of the GDV-gram centre.

Click NEXT

Correction of positioning of ellipses. (fig. 5)

Correct, if necessary, the built in ellipses. For this, "capture" the oval with the pressed left mouse button, and position the oval into the GDV-gram.

It is possible to build the ovals manually for the pictures with deviated forms, GDV images with gaps or high level of"noise".

To enlarge the picture and to correct the inner ellipse more carefully double click with the left mouse button on the GDV-gram. The dialogue window for correction will open (fig.6).
Press Undo (cancel the ellipse adjustment). The axes will appear. Shift the mouse to the edge of the supposed ellipse. Click once with the left mouse button on the axes to cut the beams.
Repeat the operation with the other axes.
Angle - change the angle of axes
Manual - build in the ellipse

Fig. 6. Manual correction of the GDV-gram inner ellipse

Auto button allows to insert the ellipse automatically after Undo operation. If necessary, "capture" the ellipse with the pressed left mouse button and position it into the centre of the GDV-gram. Level buttons allow regulating the background of the inner oval where the ellipse is inserted. It is possible to regulate automated positioning of the ellipse, changing this parameter.

Click OK

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