Category: experiments

I Changed My Avatar Icon To Express My Worries About The Oil Spill

Posted by – May 2, 2010

I decided to express my growing concerns over the recent oil spill in Gulf of Mexico. As it turns out, this could lead to a disaster never seen before, threatening hundreds of species of wildlife, including birds, dolphins, crabs and oysters living on the Gulf Coast. What worries me the most is that it seems that BP didn’t have an emergency plan in place for a situation like this, that it can happen again and that it can have irreversive impact on the wildlife in the region.

source:BBC

Therefore, I’ve put an oil blob over my avatar icons on twitter and facebook (see below). I hope the spill will end soon, that the impact will be minimal and that we humans learn from the experience so it never happens again. If you feel the same and if the fate of wildlife, environment and our planet is a concern to you, just change your avatar icon the way I did and spread the word.

If you’ve got a similar similar activity or page let me know and might link it from here.

My facebook icon:

Before

After


My twitter icon:

Before

After


Make your own:

PNG (click on image to download)

Photoshop Version (click on image to download)


How to Make a Fisheye Lens for Under $20

Posted by – April 22, 2010

Bhautik Joshi, the crazy guy who put a 18-55mm SLR lens on his iphone, has created another awesome do-it-yourself device. He uses a fisheye peephole as the main lens element and a decapitated soda can as the lens body. You can attach the whole thing to a SLR camera. Amazing!!! The quality is of course still awful but the thing is that you now can make fisheye photos with a lens that costs virtually nothing. Just take your crappy old DSLR camera, attach this lens, take 4 images at a place and stitch them together. This is I believe another step closer to making spherical panoramic photography mainstream. Good job Bhautik!

You can read the whole guide how to build it and more screenshots in the author’s article: The fisheye tin cam

The fisheye tin cam sample images

The fisheye tin cam lens

(I found this article originally at PetaPixel, thanks!)

Trying out a completely automatic way of stitching spherical panoramas

Posted by – August 9, 2009

So I finally tried to implement my own automatic way of stitching panos. Don’t expect some sophisticated system, it’s actually pretty easy. I still have to click my mouse going from one step into another, however the point is that this can be fully automated and it did not require any sophisticated input. A chimp monkey could do it instead of me :-) . I spent about 30 seconds with creating this pano which is far less than the time it took me to put this this blog post online.

Here’s what I did:
- Take the pictures, there are two things that needs to be considered when taking pictures for automatic panos
- 1. Leveling: The horizon needs to be leveled as precise as possible because the automatic software cannot determine the correct leveling for you
- 2. Precission: The pano head parallax point needs to be precisely calibrated, any misaligned is more visible in auto mode
- Load the pictures into a computer
- Adjust chromatic aberation and via a predefined filter plus apply any other filter you wish
- Export them as tiffs
- Load them in PtGui and let them auto-stitch, there is one important point:
- 1. Lens settings in PtGui: I don’t have the numbers, I’m running completely on auto stitch, that’s why I need even better precision when taking panos
- Save the result as jpeg

That’s it. 30 seconds of manual input plus 2 minutes of my quad-core gaming machine time.

And here’s the result:


Tram 7 in Prague

What do you think? I know the quality could be better, I saved it in a very low resolution to improve load time and like I mentioned above, it would help to have a lens profile set correctly in PtGui and/or calibrate the pano head more precisely.

Spherical Panorama Virtual Tour Viewer for iPhone

Posted by – July 19, 2009

Hint hint: Hey Google Maps Team! Why don’t you guys use this for implemnting Google Street View in the iPhone Safari browser? :-P

I had one of those weekends when you need to try and do something new. So I finally went ahead and created what I wanted for a long time. Virtual Tour Viewer for iPhone. Version 0.1

Index page of the Virtual Tour

Index page of the Virtual Tour

Spherical panorama view on iPhone

Spherical panorama view on iPhone

You can see it live by pointing your iPhone to this url:

Virtual Tour Viewer for iPhone:
http://bit.ly/6HEqD

Update Feb 1, 2010: Since I no longer update and improve the code I modified the application that now it uses a newer iphone panorama viewer from the 360cities.net website.

Please let me know what you think of it using comments below this article or by emailing me at jan dot vrsinsky at gmail d o t c om.

The app probably works only on iPhone and it has been tested only with my iPhone 3G. Any feedback and bug reports are appreciated.

I also want to thank waine a. lee and to Ryan Scherf, the author of jSwipe, for being an inspiration for me to write this (although they didn’t know ;-) ).

Read on: Goals, Roadmap, Technologies are below.
More…

Sphericam in action: 360 Degrees Of Panoramic Video

Posted by – June 17, 2009

Jeffrey Martin, Bruce Pales, and Jan Vrsinsky drink beer as the sun goes down at the Dejvicka station pub beer garden in Prague 6.

This is a 270×270 degree stereographic, or ‘little planet’ projection.


The video was created by Jeffrey Martin (email him at 360 c i t i e s at g mail)