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Re: Improve lens correction parameter detection

As you can see in my thread regarding "more constraints", using K3 is not always enough. There I would really want to be able to reuse the distortion configuration from another project.
by Roland Karlsson
Mon Mar 05, 2018 1:33 pm
 
Forum: Autopano Future
Topic: Improve lens correction parameter detection
Replies: 2
Views: 1412

Re: Add more constraints

I just made three panoramas. I used a fish eye lens, at F11 and exactly the same focusing. I took one row of 8 pictures, in portrait mode, i.e. 45 degrees. It was a very good overlap. I used distortion optimization for K3, which I have found almost always is a good idea. The three images were taken ...
by Roland Karlsson
Sat Mar 03, 2018 4:04 pm
 
Forum: Autopano Future
Topic: Add more constraints
Replies: 1
Views: 1009

Do anyone care about suggestions?

I do not seem to get any feedback to my suggestions. Do Kolor care?
by Roland Karlsson
Sat Mar 03, 2018 3:51 pm
 
Forum: Autopano Future
Topic: Do anyone care about suggestions?
Replies: 1
Views: 1102

Re: Using "stiff" stitching points

I agree
by Roland Karlsson
Thu Mar 01, 2018 10:42 pm
 
Forum: Autopano Future
Topic: Using "stiff" stitching points
Replies: 1
Views: 1394

Add more constraints

Autopano is mainly based on automatic panorama detection and optimization. And this is very comfortable. You just insert your images, panoramas are detected, both lens distortion, focal length and the camera direction/rotation is optimized. This is very nice when it works and everything is just fine...
by Roland Karlsson
Thu Mar 01, 2018 10:36 pm
 
Forum: Autopano Future
Topic: Add more constraints
Replies: 1
Views: 1009

Re: Improve lens correction parameter detection

I have found a solution that often works. You have to activate k3 in the distortion formula. Then it can handle my lens. Still, the result is slightly better when doing the correction before. But, it is good enough.

So - I think you need to point that out.
by Roland Karlsson
Sat Feb 24, 2018 11:35 pm
 
Forum: Autopano Future
Topic: Improve lens correction parameter detection
Replies: 2
Views: 1412

Re: Possibility to define output projection

I can give you an example of a projection I need. This is a variant of cylindrical projection, or maybe Mercator. In order to avoid curved lines, I would like to use a polygon, maybe regular, to define the base, instead of a circle. And that is it. The number of sides can be 3, 4, 5, 6, 7, 8. My alt...
by Roland Karlsson
Sat Feb 24, 2018 11:32 pm
 
Forum: Autopano Future
Topic: Possibility to define output projection
Replies: 1
Views: 1049

Re: Only quick optimization if you choose keep current value

At last! A definite answer :) Thanks. Yes, it is unfortunate. Because I really need this. Autopano do not create distortion parameters with enough accuracy. Therefore, I need to correct the images before giving them to autopano and then set - do not optimize distortion and focal length. That forces ...
by Roland Karlsson
Mon Dec 18, 2017 2:38 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Only quick optimization if you choose keep current value
Replies: 4
Views: 669

Re: Only quick optimization if you choose keep current value

I need to input the k1 and k2 parameters. Autopano do not get them right.
by Roland Karlsson
Mon Dec 18, 2017 2:07 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Only quick optimization if you choose keep current value
Replies: 4
Views: 669

Only quick optimization if you choose keep current value

Hi, I have the problem that autopano do a bad job at finding lens parameters. But - I do know them! So, I want to insert them manually. I do that, for every image (tedious!). And, then I set that distortion shall use the current value (nice!). And then - the optimization button is grayed out (less n...
by Roland Karlsson
Sun Dec 17, 2017 12:36 am
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Only quick optimization if you choose keep current value
Replies: 4
Views: 669

Improve lens correction parameter detection

The main lens I have used is a zoom lens at 28 mm (for FF). It is NOT distortion free. Not at all. In my naivety I though - it does not matter, Autopano fixes it. I have been doing lots of panos and it is very fun and it works good. But, with time comes higher demands and I see that the stitching is...
by Roland Karlsson
Thu Dec 07, 2017 12:42 am
 
Forum: Autopano Future
Topic: Improve lens correction parameter detection
Replies: 2
Views: 1412

Possibility to define output projection

Hi, it would be super cool if the output projection would be more flexible or even possible to define yourself.

I understand it needs some thinking and programming. But ... it would be so cool that it might be worth it.
by Roland Karlsson
Thu Dec 07, 2017 12:23 am
 
Forum: Autopano Future
Topic: Possibility to define output projection
Replies: 1
Views: 1049

Re: What is the exact formula for the distortion?

I think it is better to correct for a fish eye for a fish eye, using a correct model for fish eyes. Then you can make a full correction, even out to the very edge of the image circle. You would need an infinite polynomial to do that otherwise. I am one of the authors of this tool: http://proxel.se/l...
by Roland Karlsson
Wed Dec 06, 2017 9:32 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: What is the exact formula for the distortion?
Replies: 9
Views: 1166

Re: Camera preset for Panotool?

Maybe Lets assume I have found that my lens is 27.675 mm and it has k1 = 0.65 and k2 = -0.13. And this is something I have carefully calibrated. Then, I would like to use those values for other projects as fixed values that shall not be optimised. As far as I know - for Autopano Video you can create...
by Roland Karlsson
Tue Dec 05, 2017 4:08 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Camera preset for Panotool?
Replies: 3
Views: 623

Camera preset for Panotool?

I am a bit confused. I want to use the camera preset feature, but I can only find it for autopano video. After some calibration of a lens, I have found the parameters that works best. So, I want all my images from that lens to have those parameters and not optimize them. I assume I have missed somet...
by Roland Karlsson
Sun Dec 03, 2017 12:00 am
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Camera preset for Panotool?
Replies: 3
Views: 623

Re: What is the exact formula for the distortion?

Thanks for that info. Ill take a look. My lenses have lcp profiles.
by Roland Karlsson
Mon Nov 27, 2017 5:15 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: What is the exact formula for the distortion?
Replies: 9
Views: 1166

Re: What is the exact formula for the distortion?

Then I think you need to add a tool that can make a better lens analysis. That would improve the alignment of images. I have such a tool, and my plan was to use it and input the parameters into autopano. An alternative for me would be to convert all input pictures to corrected pictures before adding...
by Roland Karlsson
Mon Nov 27, 2017 4:55 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: What is the exact formula for the distortion?
Replies: 9
Views: 1166

Re: What is the exact formula for the distortion?

I do not agree. I really need it. I do not think your program is finding good parameters for my lens. And I want to generate them myself and insert them. It is not like the k1, k2 and k3 .. parameters are all that secret .. is it? There are a limited bunch of guesses what they could mean. With some ...
by Roland Karlsson
Mon Nov 27, 2017 4:36 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: What is the exact formula for the distortion?
Replies: 9
Views: 1166

Re: Do the Kolor Team monitor or even respond to support?

Good, then answer my thread about the exact formulas for lens distortion. Please.
by Roland Karlsson
Sat Nov 25, 2017 9:03 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Do the Kolor Team monitor or even respond to support?
Replies: 2
Views: 410

Re: What is the exact formula for the distortion?

Hmmmm ... I really want to know.
by Roland Karlsson
Sat Nov 25, 2017 9:02 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: What is the exact formula for the distortion?
Replies: 9
Views: 1166

What is the exact formula for the distortion?

There are some lens parameters - focal length (in mm) - k1, k2, k3 - xoffset, yoffset 1. Are offsets in pixels, mm or other measure? 2. For the distortion formula, is the radius (x distance from center) measured in pixel, mm or other? 3. What formula do you use? a. r' = r (1 + k1*r + k2*r^2 + k3*r^3...
by Roland Karlsson
Sat Nov 18, 2017 11:52 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: What is the exact formula for the distortion?
Replies: 9
Views: 1166

Re: calibration equation of correcting distortion

A correct formula for lens distortion should be

r' = r (1 + k1 * r^2 + k2 * r^4 + k3 * r^6)

I.e. the formula should only contain odd powers.

You also need to know the measure fo r. Is it in mm or in pixels or in image width?
The parameters k1, k2 and k3 will be different depending om measure.
by Roland Karlsson
Sat Nov 18, 2017 11:40 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: calibration equation of correcting distortion
Replies: 3
Views: 1145

Re: Fisheye lens distortion model

I do not think a fish eye can use the k1 k2 and k3 parameters
by Roland Karlsson
Sat Nov 18, 2017 11:33 pm
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Fisheye lens distortion model
Replies: 1
Views: 411

Re: 360x180 HDR problems - control points

I have found three workarounds to this problem. 1. You can, in the work space settings, choose hard links within stacks. Then no control points within the stacks are created. Hopefully, the camera did not move when taking any of the stacks. 2. You can call a plug in on each stack that might create a...
by Roland Karlsson
Mon Aug 01, 2016 11:04 am
 
Forum: Using Autopano Pro / Autopano Giga
Topic: 360x180 HDR problems - control points
Replies: 1
Views: 309

Re: Redo from the beginning

Thanks for the reply. Not the one I hoped for though.

A kind of solution would be if you could save the "work space", in a kind of *.pnws file.
by Roland Karlsson
Mon Aug 01, 2016 10:57 am
 
Forum: Using Autopano Pro / Autopano Giga
Topic: Redo from the beginning
Replies: 3
Views: 495
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