It is not always possible to get the best angle on a subject and eliminate all distortion. Architecture photographers often have to correct the perspective distortion of tall buildings. Capture One Pro gives you the ability to apply keystone correction. You can quickly correct any perspective distortion by using the vertical and horizontal sliders or use the cursor markers to pinpoint lines that should be parallel.
The Keystone function can be operated manually by adjusting individual sliders or when using Phase One IQ-series digital back. The Auto Keystone Correction icons can be selected beneath the sliders or in the cursor tools. Choose between the automatic vertical, horizontal or full correction.
To apply the settings to multiple images that need the same correction, you can use the local Copy/Apply functions.
Apply keystone correction manually
- Go to the Lens tool tab.
- In the Keystone tool, adjust the Vertical or Horizontal sliders.
- Adjust the Amount slider.
- Fine-tune Aspect if necessary.
Keystone correction tool
There are three Keystone auto-correction tools denoted by the following icons from left to right: Keystone Vertical, Keystone Horizontal, and Keystone. The active icon will turn orange. The keystone correction tool can be selected using the keyboard shortcut K.
Apply horizontal or vertical correction
- Go to the Lens tool tab.
- In the Keystone tool, select the Keystone Horizontal or the Keystone Vertical icon.
- Set the four points to mark up the vertical or horizontal lines that need to be aligned.
- Press the Apply button (located in the center of the image in the Viewer).
- Adjust the Amount and Aspect sliders as desired.
Hide distorted edges
There may be occasions when you need to hide the distorted edges after applying a keystone correction. In some cases, you might need to crop outside the image.
- Go to the Lens tool tab.
- Checkmark the Hide Distorted Areas option in the Lens Correction tool.
- Distorted edges will now be automatically clipped.
Auto-rotate (for IQ-series digital back)
The IQ-series digital backs have an integrated motion sensor that automatically logs the angle of a captured image.
- Press the
icon in the Keystone tool to correct an image so that the horizontal angle is square to the ground. If, for example, an image has been captured looking up at a tall building with any perspective distortion, then the (Auto adjustments) function will also correct any converging verticals. - Applying a Keystone setting will also adjust the rotation of an image. If you want to undo the Keystone setting and the rotation, remember to press the undo icon for individual adjustments.
NOTE: In Capture One Express, the Keystone function is not present.
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Comments
12 comments
The Keystone tool is definitely broken in Capture One 20! The above building example will result in a completely skewed mess!
I hope it gets updated soon!
David
C1 20 - I'm getting a horrible skew and when I select the keystone (both aspects) the handles are essentially outside of the frame so I can't grab and reposition. Needs some work guys.
Also when you try the 'Auto' option it always pops a dialog box up with '
Some of the selected Variants could not be auto adjusted.'
You are right, This tool is completely broken. producing a parallelogram rather than a square when using both aspects.
The Auto function is weird! It will only work with Phase one cameras which record the camera position which is used to make the Keystone correction.
David
I just moved to C1 from Lightroom & as an architecture photographer this is a bit of a crucial finishing tool for me. I honestly thought I was leaving the woes behind with LR.
Broken keystone tool indeed as mentioned in forums and reported more that a year ago to C1.
No luck with last update. That should be fixed!
Also the preference to chose between 80% or 100%.
Leo, DON'T HOLD YOUR BREATH!
Yep the tool STILL BROKEN and worst than that is this crappy tutorial!
I try to apply keystone to multiple bracketed images with local copy-apply but it
doesn't work.
in CO 21 on new M1 mac book pro
Hi Goran,
Thank you for the comment.
The M1 is not yet supported by Capture One versions, but please follow the upcoming updates regarding ARM-based Macs support in the next versions of the software.
Capture One seems to be not supported in standard Macs too, broken keystone tool reported more that a year ago.
Yeah, this tool is currently worthless, even when it works as intended. C1 should be the easy choice for architecture photographers except for this. Please make it work.
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