inside panoramas / cylindrical textures from real objects

Step 2 Pixel crunching (or) the fun part...

this is the fun part.

now you have 750 images.

take the middel row of pixels from each of the 750 pictures and adjoin them to a new picture.
this should now be 750 pixel wide.

and it should be looking some like that.

Comments

[RichardBronosky]

eric1000: "take the middel row of pixels from each of the 750 pictures" I'm totally confused as to how this is done. However, if you were to have said middle column (as in vertical slice of pixels) I can see how this might be possible. Also, what do you do with the result? I didn't catch anywhere that you share how you use these. (I am a skimmer, not a reader though.) Have you ever printed one of these and attached it to a cylinder?

[eric1000]

i've done the printing... but for me its more a "art" thing. maybe some 3-D worker can use it to make more realistic textures to their models, but i like it as "art"... the next thing i plan with this is to make animated pictures with lenticular lenses. i like playing with dimensions (in/out, time/room, ...) and generating a new "view" to common things... :o)

[RichardBronosky]

I printed and rolled the image of the camera. It was quite funky looking due to the lens distortion. The rubber duck looked very good when printed and rolled however. I suspect that this is because it is of [nearly] consistent "distance from center" all the way around. (or you might say cylindrical) This gave me an idea. I'm going to try to take a series of still pictures of my head with my Canon XTi and crop+join them. I think that since a human head is relatively cylindrical, this should produce good results. To eliminate lens distortion, I will use a zoom lens, shoot from a great distance, and only the center 50% of the image area. This could take me months to pull off, but I will follow up.

[eric1000]

i would like to see your pictures... please send me one if its done... even if it looks not that good.. ;-)

[eric1000]

i use the free imagemagick to do this
http://www.imagemagick.org

sliceing the middle row of an 320x240 picture work like this:
convert -crop 1x240+160+0 in.jpg slice.jpg

bringing the slices together like this:
convert -append -rotate 90 slice-1.jpg slice-2.jpg slice-3.jpg out.jpg

[RichardBronosky]

Okay, I see the "-rotate 90" in there. That made me study your turn table image more closely. I see that your camera is rotated 90. So, it makes sense that you crop a 1 pixel high horizontal row from the video and rotate it 90 degrees to use it as a vertical column for the final image. As a Linux user, I could totally bash script mencoder/ffmpeg to pull stills from the video and imagemagick to crop and join. I just could not figure out the logistics of which pixels go where, based on your original description.

[eric1000]

ok.. i thought it would come out clearly...

1st about the "-rotate 90"...
just try it without and you'll see.. ;-)

the "append" feature appends the images vertically...

so two 1x240 slices would end in an 1x480 picture.
since i need a 2x240 picture i have to rotate the slices before appending them.

2nd about scripting...
yes, that was what i was doing and i'm planing a little .exe with graphical interface for "simpler usage" in near future...

3rd about the stacking mehtod...
imagine this movieclip as source:
image 1 = 1a,1b,1c,1d,1e,1f,1g,1h,1i
image 2 = 2a,2b,2c,2d,2e,2f,2g,2h,2i
image 3 = 3a,3b,3c,3d,3e,3f,3g,3h,3i

this would lead to a picture (just the middle row of each):
1e,2e,3e,...

clearer now?

[Taotaoba]

This seems to be a hard part too. Did you use some kinds of special software tools or skills?

[eric1000]

just "imagemagick" and some batch scripting skills.

[ninepound]

Any chance we can get that script?

[eric1000]

PM me, but i want the pictures you did in return! beside that.. its a very simple script, since i described it already here how i did it... the rest is in the manpage...

[Taotaoba]

Thanks. I'm new to panoramas. Are there some software can view your product? I mean, like looking at a rotating car?

[eric1000]

hmmm... the point is not looking at a rotaiting car... the point is looking at all sides of it at once... the "product" (if you name it so) is the flat picture... not an animation or reproduction of it in a common known view... its more ment as "art" or as a physical unrolling of a "round" thing to a "flat" thing. the fun ist the switch from inside equals outside, or around equals front...

[Taotaoba]

I see. I thought it might like this one Create Quicktime VR Panoramas. Yet it does look artistic. Nice job and thanks for sharing.