Legacy ImageMagick Discussions Archive

I found this script which allows extracting a rectangular image from a fishey image:
Fisheye2Rect

Unfortunately it looks like it uses cartesian coordinates to refer a point in the source spherical picture... which is a circle, so it's a little complicated to figure out which coordinates I need to use to split the original images into 12 rectangular images, as if they where manually shot turning around.

You probably need to use pano2rect. Then cut that resulting image into your 12 pieces. Fisheye2rect is not likely what you want to use.

I guess pano2rect starts from equirectangular images, so I would need both fisheye2pano and pano2rect?

jumpjack wrote: ↑2018-07-17T10:58:02-07:00 I guess pano2rect starts from equirectangular images, so I would need both fisheye2pano and pano2rect?

No pano2rect starts for a fisheye view and unwraps it into a 360 linear panorama. See the example page. Sorry the name might be misleading.

Ok now I am a bit confused.

Input images for pano2rect and fisheye2pano scripts (from your pages):

pano2rect output:

fisheye2pano output:

Output looks the same, but first image appears erroneously flipped left-to-right.

Anyway what I need are separate images, so rather than using one of above scripts and manually splitting images, I think I'll use fisheye2rect, which directly provides single images; maybe it is slower, but maybe I can... script the script to repeteadly launch the script to produce all the 12 frames I need.

I have just to setup a converter from polar to rectangular coordinates, put it into a spreadsheet and make it generate needed command lines.

Ok this set of commands, applied to 4 different spherical images created moving around a room (from test01.jpg to test04.jpg) should produce 48 different images, which should allow a 3d reconstruction of the room.
Source images must be spherical images, 235° FOV, 2048x2048.

Code: Select all

./fisheye2rect -i 235 -o 90 -l  2048,1024 800x600 test01.jpg out01.jpg
./fisheye2rect -i 235 -o 90 -l  1911,512 800x600 test01.jpg out02.jpg
./fisheye2rect -i 235 -o 90 -l  1536,137 800x600 test01.jpg out03.jpg
./fisheye2rect -i 235 -o 90 -l  1024,0 800x600 test01.jpg out04.jpg
./fisheye2rect -i 235 -o 90 -l  512,137 800x600 test01.jpg out05.jpg
./fisheye2rect -i 235 -o 90 -l  137,512 800x600 test01.jpg out06.jpg
./fisheye2rect -i 235 -o 90 -l  0,1024 800x600 test01.jpg out07.jpg
./fisheye2rect -i 235 -o 90 -l  137,1536 800x600 test01.jpg out08.jpg
./fisheye2rect -i 235 -o 90 -l  512,1911 800x600 test01.jpg out09.jpg
./fisheye2rect -i 235 -o 90 -l  1024,2048 800x600 test01.jpg out10.jpg
./fisheye2rect -i 235 -o 90 -l  1536,1911 800x600 test01.jpg out11.jpg
./fisheye2rect -i 235 -o 90 -l  1911,1536 800x600 test01.jpg out12.jpg
./fisheye2rect -i 235 -o 90 -l  2048,1024 800x600 test02.jpg out13.jpg
./fisheye2rect -i 235 -o 90 -l  1911,512 800x600 test02.jpg out14.jpg
./fisheye2rect -i 235 -o 90 -l  1536,137 800x600 test02.jpg out15.jpg
./fisheye2rect -i 235 -o 90 -l  1024,0 800x600 test02.jpg out16.jpg
./fisheye2rect -i 235 -o 90 -l  512,137 800x600 test02.jpg out17.jpg
./fisheye2rect -i 235 -o 90 -l  137,512 800x600 test02.jpg out18.jpg
./fisheye2rect -i 235 -o 90 -l  0,1024 800x600 test02.jpg out19.jpg
./fisheye2rect -i 235 -o 90 -l  137,1536 800x600 test02.jpg out20.jpg
./fisheye2rect -i 235 -o 90 -l  512,1911 800x600 test02.jpg out21.jpg
./fisheye2rect -i 235 -o 90 -l  1024,2048 800x600 test02.jpg out22.jpg
./fisheye2rect -i 235 -o 90 -l  1536,1911 800x600 test02.jpg out23.jpg
./fisheye2rect -i 235 -o 90 -l  1911,1536 800x600 test02.jpg out24.jpg
./fisheye2rect -i 235 -o 90 -l  2048,1024 800x600 test03.jpg out25.jpg
./fisheye2rect -i 235 -o 90 -l  1911,512 800x600 test03.jpg out26.jpg
./fisheye2rect -i 235 -o 90 -l  1536,137 800x600 test03.jpg out27.jpg
./fisheye2rect -i 235 -o 90 -l  1024,0 800x600 test03.jpg out28.jpg
./fisheye2rect -i 235 -o 90 -l  512,137 800x600 test03.jpg out29.jpg
./fisheye2rect -i 235 -o 90 -l  137,512 800x600 test03.jpg out30.jpg
./fisheye2rect -i 235 -o 90 -l  0,1024 800x600 test03.jpg out31.jpg
./fisheye2rect -i 235 -o 90 -l  137,1536 800x600 test03.jpg out32.jpg
./fisheye2rect -i 235 -o 90 -l  512,1911 800x600 test03.jpg out33.jpg
./fisheye2rect -i 235 -o 90 -l  1024,2048 800x600 test03.jpg out34.jpg
./fisheye2rect -i 235 -o 90 -l  1536,1911 800x600 test03.jpg out35.jpg
./fisheye2rect -i 235 -o 90 -l  1911,1536 800x600 test03.jpg out36.jpg
./fisheye2rect -i 235 -o 90 -l  2048,1024 800x600 test04.jpg out25.jpg
./fisheye2rect -i 235 -o 90 -l  1911,512 800x600 test04.jpg out26.jpg
./fisheye2rect -i 235 -o 90 -l  1536,137 800x600 test04.jpg out27.jpg
./fisheye2rect -i 235 -o 90 -l  1024,0 800x600 test04.jpg out28.jpg
./fisheye2rect -i 235 -o 90 -l  512,137 800x600 test04.jpg out29.jpg
./fisheye2rect -i 235 -o 90 -l  137,512 800x600 test04.jpg out30.jpg
./fisheye2rect -i 235 -o 90 -l  0,1024 800x600 test04.jpg out31.jpg
./fisheye2rect -i 235 -o 90 -l  137,1536 800x600 test04.jpg out32.jpg
./fisheye2rect -i 235 -o 90 -l  512,1911 800x600 test04.jpg out33.jpg
./fisheye2rect -i 235 -o 90 -l  1024,2048 800x600 test04.jpg out34.jpg
./fisheye2rect -i 235 -o 90 -l  1536,1911 800x600 test04.jpg out35.jpg
./fisheye2rect -i 235 -o 90 -l  1911,1536 800x600 test04.jpg out36.jpg

"Just" 48 images because 50 is the usual limit of accepted images for freeware versions of stereophotogrammetry programs.

Ok, theory is over; now it's just a matter of testing...

Legacy ImageMagick Discussions Archive

Splitting spherical/pano image into square "components"

Splitting spherical/pano image into square "components"

Re: Splitting spherical/pano image into square "components"

Re: Splitting spherical/pano image into square "components"

Re: Splitting spherical/pano image into square "components"

Re: Splitting spherical/pano image into square "components"

Re: Splitting spherical/pano image into square "components"