<p>Say that you are taking pictures from a street like this one:
<a href="https://i.sstatic.net/eLOfs.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/eLOfs.jpg" alt="enter image description here" /></a></p>
<p>As you can see, the picture is taken perpendicular to the direction of the street.</p>
<p>The problem is that cars at the left look as if they are going East South:</p>
<p><a href="https://i.sstatic.net/7VpIt.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/7VpIt.png" alt="enter image description here" /></a></p>
<p>And cars at the right look as if they are going East North:</p>
<p><a href="https://i.sstatic.net/ndwxz.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/ndwxz.png" alt="enter image description here" /></a></p>
<p>Only when they're right in front of you, the cars look like going simply East:</p>
<p><a href="https://i.sstatic.net/eajgo.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/eajgo.png" alt="enter image description here" /></a></p>
<p>As I understand, the name for this phenomena is called &quot;Horizontal Convergence&quot;. How could you remove this phenomena from a picture? That is, how can I transform the image so that all the cars look like going simply to the East no matter their horizontal position.</p>
<p>To read about a &quot;vertical congergence&quot;: <a href="https://digital-photography-school.com/how-to-overcome-the-problem-of-converging-verticals/" rel="nofollow noreferrer">https://digital-photography-school.com/how-to-overcome-the-problem-of-converging-verticals/</a></p>

CC BY-SA 4.0
2020-10-09T11:07:53.113Z
Use a small field of view lens and move further away. It's perspective, unless you are talking about some kind of extra lens distortion too. See telephoto on wikipedia.
lightxbulb
CC BY-SA 4.0
2020-10-10T05:55:36.120Z
@lightxbulb thanks for the suggestion, but I’m looking for a transformation in software
Lay González
<transformations><camera><distortion>
What's the name of the transformation that can remove horizontal convergence from a picture?
Lay González
# What's the name of the transformation that can remove horizontal convergence from a picture?

(Asked by: username_0 on 2020-10-09)

Say that you are taking pictures from a street like this one:
[![enter image description here](https://i.sstatic.net/eLOfs.jpg)](https://i.sstatic.net/eLOfs.jpg)

As you can see, the picture is taken perpendicular to the direction of the street.

The problem is that cars at the left look as if they are going East South:

[![enter image description here](https://i.sstatic.net/7VpIt.png)](https://i.sstatic.net/7VpIt.png)

And cars at the right look as if they are going East North:

[![enter image description here](https://i.sstatic.net/ndwxz.png)](https://i.sstatic.net/ndwxz.png)

Only when they're right in front of you, the cars look like going simply East:

[![enter image description here](https://i.sstatic.net/eajgo.png)](https://i.sstatic.net/eajgo.png)

As I understand, the name for this phenomena is called "Horizontal Convergence". How could you remove this phenomena from a picture? That is, how can I transform the image so that all the cars look like going simply to the East no matter their horizontal position.

To read about a "vertical congergence": <https://digital-photography-school.com/how-to-overcome-the-problem-of-converging-verticals/>

**Tags:** transformations, camera, distortion

> **Comments:**
> **username_1**: Use a small field of view lens and move further away. It's perspective, unless you are talking about some kind of extra lens distortion too. See telephoto on wikipedia.  
> **username_0**: @username_1 thanks for the suggestion, but I’m looking for a transformation in software  

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## 0 answers

