Hugin Part 2 - De-Fishing an Image and Straightening a Pattern

[@gvanamburg]

Seven years later and your video is still helping! I just discovered Hugin and your videos really helped me understand the tool (or toy as I use it to enjoy my cell phone camera photos). Thank you for sharing.

[@JamieHamelSmith]

Awesome! Hugin is a great tool. I still use it every couple of months.

[@PhilipWeber]

This worked amazingly well for me. There is no way I could have figured out that Hugin interface without your help. Thanks!

[@JamieHamelSmith]

+Philip Weber no problem!

[@LittleMartianxx]

Genius! I do a lot of architecture and use a lot of wide angle and even fisheye lenses. The first time I looked in on Hugin (hewgiin?) I couldn''t figure it out! I have been doing all my dewarping in photoshop. Now I have the confidence to try working with Hugin. Thanks!

[@codebuster3132]

same here, this video is still very useful ... thanks Jamie

[@MichaelHonsinger]

Thank you Jamie. I can't afford PtGui at this time so I'm trying Hugin out & your 2 tutorials are better than anything I've come across so far!

[@arthurlocke5846]

Thanks Jamie. Hugin is not an easy piece of software to master, although the interface does allow even a beginner to achieve reasonable results for stitching. Your video has really helped me to understand how to use it. Congratulations on an excellent educational video.

[@hermanverbaeten5894]

Hi Jamie, very useful tutorial. Thanks! I have one question if i may: when importing a picture Hugin is asking for the focal length which you have to input. Then on the right side it says focal length multiplayer 2x. How does the program know this. Personally I’m using a 1.6 crop sensor of a canon r7 and a 8mm Samyang. Does this mean that I have to put in 1.6 x because in my version of hugin it doesn’t’ get filled in automatically. Thanks for your advise! Kind regards Herman

[@MarinaUganda]

DO you have something on alining a batch of handmade (not tripod) photos to make a time lapse?

[@mjones410]

Thanks for the great information. I don't actually like to turn my fisheye shots rectilinear as it crops so much of the image, however using the other projections as you described works really well, particularly "Thoby Projection".

[@danthewalsh]

Two questions: is it possible to save a lens from hugin using the result of this process so that I don't have to repeat these steps every time I want to remove distortion from the same lens? Second, It looks like the optimizer only optimizes the "barrel distortion" (aside from rotation, which is not a property of the lens, but rather how the photo was taken). Suppose my lens has more complicated distortion than just "barrel distortion". Is there some way I can put down a much larger number of horizontal and vertical lines, and have hugin optimize for more complex lens distortion?

[@JamieHamelSmith]

+Daniel Walsh I think the answers to your questions are yes, and yes. Hugin optimizes more than just barrel distortion.

[@danthewalsh]

+Jamie Hamel-Smith Thanks for your reply. When messing around with the different kinds of distortion manually, I only saw three different kinds of distortion that are adjustable: "distortion (a)", "barrel (b)", and "distortion (c)". The Hugin documentation says the distortion formula maps points only radially away from the common center, which seems to me a pretty restrictive condition. Also, it's using a general quartic polynomial (without constant coefficient) to map r_dest to r_src, where the quartic coefficient is not adjustable to keep image size fixed. This troubles me, since the polynomial should be an odd function, so that plugging in points on opposite sizes of the center give symmetric results, but that would mean a and c must be zero, leaving only b adjustable.

[@JamieHamelSmith]

+Daniel Walsh Woah... Yeah, I've never gone that deeply into it. What kind of correction are you hoping to do exactly?

[@danthewalsh]

+Jamie Hamel-Smith I'm actually not using it for anything fancy; I'm just stitching aerial photography panoramas and I like the idea of knowing 100% that the distortion on the lens of my camera is accounted for to the most reasonable accuracy. Frankly, I don't think my requirements actually require delving this deep into the details, but I'm also a Physics Graduate student, and sometimes I get a bit carried away with the theory. Anyways, thanks for the advice. Your video is very clear and helpful, and I learned a lot. Thanks.

[@IIIspirit]

Thank you good Sir!

[@FrancescoBacigalupo]

Thank you very much, this video tutorial has helped me alot.

[@JamieHamelSmith]

Hey, thanks. I'm glad you liked it. I think I need to do an updated one with the new version too.

[@MrChilensko]

Thanks,thanks and thanks! these a great video, would please make a video how to make a 360 panorama with a fish eye lens? Hugin is not easy to learn

[@pixelkay2004]

thanks!!