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I'd love someone with more CV experience to explain why this fails on my use case? (four image zip) https://drive.google.com/file/d/1gTZWlKmS4ZtEZDK8OjjLeGN_V0

I'd love someone with more CV experience to explain why this fails on my use case? (four image zip) https://drive.google.com/file/d/1gTZWlKmS4ZtEZDK8OjjLeGN_V0FAAlrx/view?usp=sharing https://drive.google.com/file/d/1gTZWlKmS4ZtEZDK8OjjLeGN_V0F...

Mumps 4y ago
(sorry don't have time to run through the OP script and check what you're getting for outputs, but...) - I'm not even entirely sure how these images would stitch together - between 1.jpeg and the rest, there is very little overlap. RANSAC likely won't find matchable points. - you're asking for a pretty severe homography of the scene.
- StephenSmith 4y ago
  Thanks! That's what I was trying to understand.
bmh 4y ago
A panorama is built by stitching together many images taken from the same viewpoint. The 1st critical thing you need to know, is that the camera may not move. It may only rotate. If the camera moves a tiny bit, that's generally OK, but there will be stitching artifacts. To be really precise, the entrance pupil of the camera shouldn't move, but this is quite hard to get right. The 2nd thing, is that the stitching algorithms need to match images to each other, and in order to do this, the images must have large overlapping portions. This usually means that if you want to create a 360 degree panorama where you spin your camera all the way around, you'll have at least about 12 images. The minimum number of images depends on how wide your lens is. This is a great overview of panoramas: http://6.869.csail.mit.edu/fa17/lecture/lecture14sift_homography.pdf http://6.869.csail.mit.edu/fa17/lecture/lecture14sift_homogr... One more thing: It really helps to apply lens correction to your camera images, if you're trying to create a high quality panorama.
- kurupt213 4y ago
  Nice explanation
zimpenfish 4y ago
Panorama Stitcher (macOS) matched 3 and 4 to give https://imgur.com/a/HnagrrH https://imgur.com/a/HnagrrH but image 2 is just too skewed to match, even after rotating in Photoshop, and image 1 is just wonky re: 4 and difficult to orient for a match.

Mumps 4y ago

(sorry don't have time to run through the OP script and check what you're getting for outputs, but...) - I'm not even entirely sure how these images would stitch together - between 1.jpeg and the rest, there is very little overlap. RANSAC likely won't find matchable points. - you're asking for a pretty severe homography of the scene.

StephenSmith 4y ago
Thanks! That's what I was trying to understand.

bmh 4y ago

A panorama is built by stitching together many images taken from the same viewpoint. The 1st critical thing you need to know, is that the camera may not move. It may only rotate. If the camera moves a tiny bit, that's generally OK, but there will be stitching artifacts. To be really precise, the entrance pupil of the camera shouldn't move, but this is quite hard to get right. The 2nd thing, is that the stitching algorithms need to match images to each other, and in order to do this, the images must have large overlapping portions. This usually means that if you want to create a 360 degree panorama where you spin your camera all the way around, you'll have at least about 12 images. The minimum number of images depends on how wide your lens is. This is a great overview of panoramas: http://6.869.csail.mit.edu/fa17/lecture/lecture14sift_homography.pdf http://6.869.csail.mit.edu/fa17/lecture/lecture14sift_homogr... One more thing: It really helps to apply lens correction to your camera images, if you're trying to create a high quality panorama.

kurupt213 4y ago
Nice explanation

zimpenfish 4y ago

Panorama Stitcher (macOS) matched 3 and 4 to give https://imgur.com/a/HnagrrH https://imgur.com/a/HnagrrH but image 2 is just too skewed to match, even after rotating in Photoshop, and image 1 is just wonky re: 4 and difficult to orient for a match.