The Automatic horizon correction is a particularly effective tool when ViewPoint finds sufficiently horizontal or vertical elements in the picture, even of small size.
The presence of verticals is particularly successful in the correction.
In palette “Horizon”
– ViewPoint: “Auto” button
– PhotoLab: Magic wand
The grid display allows visualizing horizon defects and their magnitude before correction, and the validity of the proposed recovery after correction.
Display the Grid
– ViewPoint: Toolbar Button (G Key)
– PhotoLab: Menu: View – Grid (Ctrl/Cmd + G)
There is no need to correct the horizon if you plan to use Perspective AutoCorrect since it will take care of it by itself.
On a slightly leaning sea horizon. The automatic result is perfect.
Here, the horizon is centered on the frame. If it is close to one of the edges, it may be marked by distortion, sometimes very significant, which should be corrected beforehand (optical module or manual correction).
|ViewPoint sometimes fails to perform a satisfactory automatic correction. Most often this failure is due to “disruptive elements”.|
E.g. the presence of oblique lines without other vertical or horizontal references, or a majority of non-parallel vertical lines in the picture. The correction error is often very obvious.
This is a significant example in which, despite the presence of buildings in the background, ViewPoint does not seem to appreciate the monumental modern sculpture!
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