7 Image Registration

1Click the Control Point Prediction button .

Note Because the Control Point Selection Tool predicts control point locations based on the locations of the previous control points, you cannot use point prediction until you have a minimum of two pairs of matched points. Until this minimum is met, the Control Point Prediction button is disabled.

2Position the cursor anywhere in any of the images displayed. The cursor changes to the crosshairs shape, .

You can pick control points in either of the Detail windows, input or base, or in either of the Overview windows, input or base. You also can work in either direction: input-to-base image or base-to-input image.

3Click either mouse button. The Control Point Selection Tool places a control point symbol at the position you specified and places another control point symbol for a matching point in all the other windows. The symbol for the predicted point contains the letter P, indicating that it’s a predicted control point,

4To accept a predicted point, select it with the cursor and move it. The Control Point Selection Tool removes the P from the point.

Moving Control Points

To move a control point,

1Click the Control Point Selection button .

2Position the cursor over the control point you want to move. The cursor changes to the fleur shape,

3Press and hold the mouse button and drag the control point. The state of the control point changes to selected when you move it.

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