Partial Panorama Questions

[greg young]

I need help with this issue:

I have a question about partial panoramas. I read the earlier posts about plugins and using borders. This works sometimes for me. But not for all images. I have an image that is 5760w x 1052h. The shot has an angle of view of about 180 degrees. My question is twofold. First, in order for Flashificator and FPP to use this image and get proper remapping into conventional perspective, do I need to add another 180 degrees of blank image to the width to approximate a 360 degree panorama. Mindful of the 8191 pixel limit, I resized the image so the width was 4095 and then added 4095 of blank image. I then had an image 8190 x 748. I used the plugin and set borders. This worked. However, I then realized since my horizon was not quite straight yet that my image was less than 180 degrees. So for experimentation I assumed the image was 120 degrees. Following the same procedure I created an image 8190 x 499. This worked as well. Until I tried full screen. Then I got a normal image except for about 10 percent at the top and 10 percent at the bottom. This file (capture_2.jpg) can be viewed here. http://www.gregorygyoungphoto.com/pano/distortedpicture/

I'm assuming 499 pixels aren't enough. Is there another way around this for images that were shot with less than a 180 degree angle of view? Thanks, Greg

[siesfor]

for your first question, no, you do not need to add blank space to your image. You just need to define the vfov & hfov in your cylConverter section. check out the partial panorama example in the examples folder of FPP for a better idea.

As for the exposed jagged edges, those can be gotten rid of by adjusting the ratio parameter in the <parameters> section. ratio=1.6 is a good place to start, if it doesn't work, try adjusting it up or down a point or two.

[HansNyberg]

Just remember one thing. Even if the plugin is called a cylindric converter it is NOT.
It only converts partial spherical panoramas to 6 cubefaces. (with black canvas added)

So if you use a stitcher which only has cylindric projection as output you have to use some other plugin to convert it to spherical projection.
The cylindric source will be distorted at FOV higher than 65 degrees,

If you do not know the difference you can see it here
http://www.panoramas.dk/panorama/projections/

Hans
www.panoramas.dk

[greg young]

Can this be done in Flashificator? How? Thanks, Greg

[Trausti Hraunfjord]

http://flashificator.com/1/Diverse/BorderTestingPartialPano

What I did, was to:

Cut away the distorted parts of the image
Add to the size of the canvas in PS, (now the size is 3500x594 pixels in total)
Use Borders plugin in combination with zooming in/out and tilting the image while finding the correct borders.

That's it.

[greg young]

I'm not sure I understand. The distorted part was created by Flashificator. If I take the original partial panorama and add to the size of the canvas, won't it be distorted? The image I showed (capture 2) was from a screen capture of the panorama generated by Flashificator. And how did you get to 3500 x 594?
Also, I continue to have login problems at this page.
http://www.flashificator.com/forums/ucp.php?mode=login
I log in by using the link http://flashpanoramas.com/forum/index.php
and this already has me logged in.
Thanks, Greg

[Trausti Hraunfjord]

Can you share the original image, so that I can make proper tests?

I added to the canvas in photoshop... thereby getting it up to 3500 pixels.

Having checked on the memberlist, I can't see your name appearing anywhere in it. It might be a good idea to sign up again. Should there be anyting that is not working right for you, please do not hesitate to contact me again.

If you are not logged in as a member, and apply for access to the updates, you will not have access to the updates. So it is important for you to get the membership part working.