How to geometrically transform objects using control points?

CN
Posted By
Carlos N
Sep 2, 2006
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786
Replies
6
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Closed
I have a seemingly simple problem, but I can’t find an easy way to do it.

I have photographs of two objects which should look identical. However, they were taken from slightly different angles – close enough that they can be transformed to look the same.

I want to transform one object to have the same exact shape (i.e. perspective) as the other. I have been able to this roughly by using a "free transform" of a selection, and stretching individual corners so that the objects come close to matching up.

What I’d much rather do, is select points 1,2,3,4 on both images and then tell Photoshop, transform picture 2 so that the four control points are in the same exact location as those of picture 1.

Is it possible to do this? Is there a plugin that can help?

Note – in the future, I have another project that would necessitate even more control points to transform (matching up 2 maps), so a generic solution is better, if possible.

Thanks!
Carlos

How to Master Sharpening in Photoshop

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CN
Carlos N
Sep 2, 2006
One potential way of doing what I want would be to use the "warp" transform … if it had more points for warping than just the corner bezier guides.

Carlos

Carlos N wrote:
I have a seemingly simple problem, but I can’t find an easy way to do it.
I have photographs of two objects which should look identical. However, they were taken from slightly different angles – close enough that they can be transformed to look the same.

I want to transform one object to have the same exact shape (i.e. perspective) as the other. I have been able to this roughly by using a "free transform" of a selection, and stretching individual corners so that the objects come close to matching up.

What I’d much rather do, is select points 1,2,3,4 on both images and then tell Photoshop, transform picture 2 so that the four control points are in the same exact location as those of picture 1.

Is it possible to do this? Is there a plugin that can help?
Note – in the future, I have another project that would necessitate even more control points to transform (matching up 2 maps), so a generic solution is better, if possible.

Thanks!
Carlos
L
lanranger
Sep 2, 2006
I don’t know of anything made for matching the perspective of two photos, but there are plugins that allow for easy correction of barrel distortion and perspective correction. I would think if you ran such a plugin on both images they would match up pretty well.

I’ve used Andromeda’s LensDoc. It’s very easy to use, powerful, and unfortunately quite pricey at $98.
http://www.andromeda.com/main/lensdoc.php

There are more affordable options–just google something like barrel distortion photoshop plugin.
F
FredEx
Sep 2, 2006
On Fri, 01 Sep 2006 23:13:16 -0400, Carlos N
wrote:

One potential way of doing what I want would be to use the "warp" transform … if it had more points for warping than just the corner bezier guides.
Carlos

Just off the top of my head…might a morphing program work?


FredEx
J
john
Sep 2, 2006
On Fri, 01 Sep 2006 22:50:36 -0400, Carlos N
wrote:

I have a seemingly simple problem, but I can’t find an easy way to do it.
I have photographs of two objects which should look identical. However, they were taken from slightly different angles – close enough that they can be transformed to look the same.

I want to transform one object to have the same exact shape (i.e. perspective) as the other. I have been able to this roughly by using a "free transform" of a selection, and stretching individual corners so that the objects come close to matching up.

What I’d much rather do, is select points 1,2,3,4 on both images and then tell Photoshop, transform picture 2 so that the four control points are in the same exact location as those of picture 1.

Is it possible to do this? Is there a plugin that can help?
Note – in the future, I have another project that would necessitate even more control points to transform (matching up 2 maps), so a generic solution is better, if possible.

Thanks!
Carlos

Have a look at

http://www.dpreview.com/learn/?/Image_Techniques/Barrel_Dist ortion_Correction_01.htm
K
Kingdom
Sep 2, 2006
Carlos N wrote in
news:edarht$n2i$:

I have a seemingly simple problem, but I can’t find an easy way to do it.

I have photographs of two objects which should look identical. However, they were taken from slightly different angles – close enough that they can be transformed to look the same.

I want to transform one object to have the same exact shape (i.e. perspective) as the other. I have been able to this roughly by using a "free transform" of a selection, and stretching individual corners so that the objects come close to matching up.

What I’d much rather do, is select points 1,2,3,4 on both images and then tell Photoshop, transform picture 2 so that the four control points are in the same exact location as those of picture 1.
Is it possible to do this? Is there a plugin that can help?
Note – in the future, I have another project that would necessitate even more control points to transform (matching up 2 maps), so a generic solution is better, if possible.

Thanks!
Carlos

Doubt you can do it in photoshop but try looking for free or trial morphing software that might do it for you.


———————————————————— ———— Learning is not attained by chance, it must be sought for with ardor and attended to with diligence.
———————————————————— ————
TN
Tom Nelson
Sep 3, 2006
Try Automate>Photomerge. Usually, you shoot several pictures with an area of overlap and Photoshop warps the photos to best put the overlapping parts on top of each other.

In this case, you have two photos with image overlap which completely covers the frame. This should make it even easier. Click the "Keep As Layers" button. Make each layer its own picture and you’re done.

Tom Nelson
Tom Nelson Photography

In article <edarht$n2i$>, Carlos N
wrote:

I have a seemingly simple problem, but I can’t find an easy way to do it.
I have photographs of two objects which should look identical. However, they were taken from slightly different angles – close enough that they can be transformed to look the same.

I want to transform one object to have the same exact shape (i.e. perspective) as the other. I have been able to this roughly by using a "free transform" of a selection, and stretching individual corners so that the objects come close to matching up.

What I’d much rather do, is select points 1,2,3,4 on both images and then tell Photoshop, transform picture 2 so that the four control points are in the same exact location as those of picture 1.

Is it possible to do this? Is there a plugin that can help?
Note – in the future, I have another project that would necessitate even more control points to transform (matching up 2 maps), so a generic solution is better, if possible.

Thanks!
Carlos

How to Master Sharpening in Photoshop

Give your photos a professional finish with sharpening in Photoshop. Learn to enhance details, create contrast, and prepare your images for print, web, and social media.

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