Archive for the ‘Videos’ Category

Opening Yellow Flowers

Monday, May 28th, 2007

Quicktime movie, 1.50mb, 25s playing time
150 frames, 1h 40m, ~40s between frames
near my apartment
May 28, 2007
Recommended: Large Version, 1000×665, 17.91mb

Because there is so much going on here, I find it’s nice to look at just one flower open up at a time. As the overcast conditions gave way to sunshine, intermittent clouds covered the sun, which lead to the change in brightness during the movie. As is the case with many of my time-lapse movies, the higher resolution version is well worth the download. Of course, either version is much better than anything you’d see on YouTube.

I also took some close-up images of the flowers, and the honey bees patronizing them. You can visit the gallery by clicking on the image below. A couple of the bees had very impressive collections of pollen on their legs.

Update: Helicopter

Monday, April 16th, 2007

I left my helicopter alone for over a month recently because I had become frustrated. It seemed that all of a sudden, my ability to fly had eroded. I could no longer keep the heli stable. Other times, the heli would be twitchy and erratic and unflyable, while even just sitting on the ground with no input from the control sticks.

After the internet provided no clues about the twitching, I took it to a local shop. The shop tech guessed I had a bad crystal in the receiver. As soon as he popped in a new set (in the transmitter too, of course) the heli was as good as new.

Since then I’ve bought a new Lithium-Polymer battery that allows nearly 20 minutes of flying time, compared to the 5-7 from the included Nickel-Metal Hydride battery. I also bought a different motor which the helicopter manufacturer recommends for maximum flight time. The old battery still works, but it is not as satisfying as the new one.

Below is a video of me taking the heli up to about eye level, (well out of ground effect) hovering for a few seconds, and bringing it back down safely. I think the heli looks far more stable that it did in my last post on this topic.

Since I made the above movie a few weeks ago, my helicopter is again on the fritz. This time, it’s the tail motor which no longer works. The tail blades very easily strike the ground, and this causes the tail rotor to slow down (obviously). In order to speed the tail rotor back up, a quick burst of current is required, which repeated enough times eventually burns out the motor. The symptom is a nearly uncontrollable heli. I have burnt out two tail motors.

Since I don’t want to continually buy new tail motors ($10 a pop), I went ahead and bought myself the RC simulator I yearned for only two weeks ago. As you can see in the movie below, crashes in the virtual world are much less devastating:

In this movie I’m flying using the night mode, which puts lights at the tips of the rotors so you can see the orientation of the heli. Red and blue on the main rotors; yellow on the tail rotor. Please excuse the poor quality of the video as I made it with my (relatively) antiquated digicam. I would have used a software video capture program, but they’re (very) not free and cause the computer to slow down so much that the aircraft is uncontrollable. Below is a video showing a bit more flying skill and no crashes:

My goal with the simulator is to improve my instincts and reflexes, so when I return to the real world, I’ll have mastered all the basic skills. It’s also fun to fly and not have to worry about real world consequences.

Concrete

Tuesday, March 20th, 2007

Quicktime movie, 3.70mb, 3m 11s playing time
1917 frames, 7h 39m, ~13s between frames
1s playing time ~ +2min real time
from SERF, 4th floor, looking west
March 20, 2007
Recommended: Large Version, 1000×260, 25mb

Perhaps it’s the nature of pouring concrete, or union jobs, but the middle of this time lapse is pretty boring. Sorry about that. The beginning is fun enough; and the end, with the inch-worm workers and the vacuum-like concrete massager, is cool, too.

Please note the right 1/3 of the image is slightly affected by the reflection of the building façade on the window. Let me repeat, the large version is worth downloading.

Mosaic Time Lapse

Monday, March 12th, 2007

(Hint: click on the whitespace below.)

Roll your mouse over the whitespace above and click it on it. Your challenge is to figure out what the image is as quickly as possible. I’ll wait…

Some of you may remember my photo mosaics I played around with a while back. This is exactly that, but this time, I took a screen shot every 20 seconds or so as the program refined the image.

This mosaic is made up of a bunch of ‘glyphs’ which are a colored square with a colored letter/symbol in the middle. The colors and symbol are randomly chosen. The movie above compresses about 8 hours of real time into under two minutes. In that 8 hours the program tried over 330,000 glyphs for the 2500 tiles on the image. The interesting thing is the basic shapes in the image resolved themselves quickly, while the colors took much longer, and never really matched the original image.

Here is a link to a composite photo, showing the original photo and the final mosaiced photo. I don’t think the mosiac really captures my tongue accurately.

Neighbors Deck

Friday, February 23rd, 2007

Quicktime movie, 3.72mb, 1m 40s playing time
1000 frames, 3h 40m, ~13s between frames
my neighbors deck, looking north
February 22, 2007

This time lapse was shot before, during, and after the passing of a rain front. See if you can tell when the rain starts. The most interesting thing to follow are, of course, the clouds, which change direction & speed. The clouds really get moving on the backside of the front.

I hope you like the new, inline quicktime movie presentation.