Success of the automatic perspective correction depends on several criteria:
* The presence of enough vertical and / or horizontal components
* Absence of disturbing elements (remarkable neither horizontal nor vertical lines)   
When these conditions are met, ViewPoint gives very good results. 

In palette “Perspective”   
– ViewPoint: “Auto” button 
– PhotoLab: Magic wand 
 


Auto Perspective correction

A successful automatic correction may truncate a large part of the subject. 
This is a very common situation where ViewPoint crops to the narrowest part of the image (usually at the bottom since most buildings photos are low-angle shots). 
Cropping is required and sometimes setting a different image ratio as well.

In palette “Crop”   
– ViewPoint: Choose “Custom” from the drop-down list, then enter the width / height ratio
– PhotoLab: Choose or enter the width / height value directly in the “Aspect ratio”

Viewpoint only: The checkbox “Constrain to image” forces the frame to remain in the image area.   


Auto Perspective correction and manual cropping


Limit the auto correction to one of the directions; vertical or horizontal

This limitation in the directions makes it possible to preserve the automatism of the perspective correction.

In palette “Perspective”   
– ViewPoint: “Auto Correct” drop-down list
– PhotoLab: “Auto mode” – Choose the desired direction:
– Verticals & Horizontals (default) 
 – Verticals only 
 – Horizontals only


Limit auto correction to one of the directions Vertical or Horizontal 

Modulate the intensity of the correction

By default, the automatic correction is complete (100%), that is to say the directions are perfect. It is possible to reduce its effect with the slider “Intensity“.

In palette “Perspective”  
– Acting on the “Intensity” slider 

This relatively common situation is significant of the limitations of automatic correction. It seems successful when it does not conform to the rules of perspective. Or, it is not pleasant to the eye.



Modulate the intensity of the correction

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