Fix Converging Verticals With DxO ViewPoint 4
Fix Converging Verticals With DxO ViewPoint 4
In this article, I’ll explain how to fix converging verticals using DxO ViewPoint 4. It is, of course, possible to avoid converging verticals when you capture your photo. If you’d like to know more about how to do this, see my tutorial about avoiding converging verticals.
Unfortunately, it isn’t always possible to avoid converging verticals, which is when we need to turn to software to fix our photos. Many RAW converters include tools you can use to fix perspective problems. If you’d like to know more about using Adobe Lightroom to fix converging verticals, I’ve created a separate tutorial.
While the perspective correction tools in many RAW converters are good, specialist software may give superior results. One such package is DxO ViewPoint 4.
Converging Verticals Example
Here’s an example of the converging verticals problem.
Notice in this photograph, the tall buildings appear to converge inwards towards the top of the frame. This is a typical example of converging verticals. It’s caused by tilting the camera either up or down. But you can also create perspective problems by tilting the camera, left and right.
Perspective correction tools such as ViewPoint 4 can address all these problems.
What is DxO ViewPoint 4
DxO ViewPoint 4 software is dedicated to correcting perspective problems. It can be used either standalone or as a plug-in for Photoshop. Affinity Photo users should be aware that it may not be compatible with Affinity Photo. I have tested this myself, whilst I was able to launch the software from Affinity, I wasn’t able to save the results. You may therefore need to use the software standalone.
After launching DxO ViewPoint, you will see the interface as shown below.
The screenshot in this example is of ViewPoint 4, used as a Photoshop plugin. The stand-alone interface is almost identical.
Here, we see our image open for editing in the centre of the screen. This preview will continue to reflect any changes we make using the editing controls. These controls are arranged into a series of panels on the right side of the interface.
To correct the converging verticals problem in this image, we will use the Perspective panel which you can see below.
This has three groups of controls we can use to correct our photo, although they may not all work well.
The Auto Correction
The first option is clicking the Auto button. When we click this, DxO ViewPoint will analyse the image and attempt to correct it. Unfortunately, with some images, the software doesn’t work well, and this is one of those. Here is the result.
What’s happened here is that the software has prioritised correcting the building on the right of the frame.
If you find the Auto option fails, click the button a second time to turn it off. You can then try one of the manual options.
Using The Perspective Sliders
The next option is using the perspective controls.
Here, we can see three sliders, which we can use to correct the photo’s perspective.
Earlier, we said converging verticals occur when we tilt the camera up or down. This is why our first control is the “Up / Down” slider. As you move the slider left and right, it counters the cameras tilt at the time of capture.
We also said that we can create perspective distortion by tilting the camera left and right. Again, our second slider titled “Left / Right” is used to correct this.
By moving these two sliders left and right we can remove the converging verticals from this image. You can see the result below.
Although this has fixed the converging verticals in the image, the image has also been stretched. Notice the tall building near the centre of the frame is now cut off at the top. This is where our third slider, H/V Ratio, can be used.
When we move this slider left, it compresses the height of the image. This brings the top of the building back into the frame. If you want to stretch the building further, move the slider right. Here’s the result of fixing the image by moving it left.
Let’s look at the third way to fix converging verticals in DxO ViewPoint 4.
Perspective Control Lines
The Perspective Control Lines are the four icons running along the top of the Perspective panel, as highlighted in the following screenshot.
The first two icons from left to right allow you to fix vertical and horizontal distortion. The second two icons will correct for both vertical and horizontal distortion. These can be trickier to use.
If you find it difficult to correct for both horizontal and vertical distortion, use the first two icons. This allows you to apply one type of correction first before applying the second. Let’s look at how to use the vertical correction Control Lines with our photo.
Vertical Correction Control Lines
As our photo is suffering mainly from converging verticals, let’s correct that. Click the first icon on the left, which displays two vertical lines. You will then see two vertical control lines appear on the image.
At each end of the two control lines is a node. To position the control Lines, click and drag these nodes with your mouse. As you do so, you will see the area magnified to help you position them exactly.
Position the two control lines along the edges of the buildings that you would like to correct.
When you have the control lines in position, click the preview button at the bottom of the interface. You will then see a preview of the corrected image.
If you like the preview, click the Apply button to apply it. You can then make further corrections using the other controls if necessary.
Having fixed the converging verticals in the image using the Vertical Control Lines, we find the top of the tall building is being cropped again. To correct this, return to the H/V Ratio slider discussed above and use it to fix the problem.
Here’s the finished image, having fixed the converging verticals.
If you want to watch this correction being made in DxO ViewPoint 4, the following video demonstrates it. I also demonstrate some of the software’s other features, so it’s worth taking a few minutes to view it.
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You can also watch this video on my YouTube channel. I publish a new video every week, often based on subscribers’ requests and feedback. Subscribe to my YouTube channel now and be sure not to miss future videos.
Earlier in the article, we said that left/Right perspective distortion can be corrected in DxO ViewPoint. An excellent alternative to this can be found in the Nik Collection. This article demonstrates how Nik Perspective Efex can be used to correct perspective problems. It’s a good one to read next.
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