I second Angela, informative, chill and kinda funny
A little more context:
The exposure time for each line is a maximum of 30 ms. That number comes from dividing the amount of lines over the time a scan takes. Factoring in overhead from read-time and actually incrementing the sensor, I guess the sensor is open for maybe 15-20 ms.
As I said above, flickering sources are an issue. They manifest as periodic lines of darker and brighter streaks, kind of like venetian blinds. The LED sources I sometimes use are meant for film, so they’re either continuous, or on fast enough duty cycles so it doesn’t really matter, fluorescent sources powered from mains are from my experience most likely to mess things up.
The lights used here are continuous sources. Flickering sources show up as evenly spaced streaks across the whole image. Kind of like video of an old CRT TV.
It’s been a while, here’s an experiment with the scanner and perpendicular rotation, the model is rotating on an office chair, very slowly, and the scan is from top to bottom over 2-ish minutes.
If you like jazz piano, Keith Jarret’s köln concert is a masterpiece.
There were a bunch of issues with the venue and he ended up playing the whole thing on a broken piano.
This video sums up how the peice happened.
Edit: I like to think it’s a story of stacked disasters and a master artist somehow making the whole mess gorgeous.
Stream of consciousness from train of thought and dance of eternity from meteropolis pt. 2 are really good, long-ish instrumentals that kind of tell a story.
And to answer OP: Metropolis pt.2 by dream theater is a great concept album that has an interesting story to follow.
I had forgotten about maggot brain, such a great song! Thanks for reminding me.
A greedy crow is what they told me
I’d like to see your solution in total. I’m not too familiar with the nuts and bolts, but hash set is quite a bit more expensive than a simple vector, there’s a bunch of overhead incurred when executing the hashing and placing of the data, and when repeating a few thousand times it sure adds up. My part one hovers around 600 microseconds.
Not who you asked but: I save coordinates and direction into a vector each time the guard faces a #. Also every time the guard faces a #, I check if the position exists in the vector, if true, it’s an infinite loop. 78ms rust aolution.
Rust
This one was the first real think for this year, but I ended up brute forcing it, placing a ‘#’ in every position and checking. part 2 runs in about ~~380ms~~ 78ms (after reducing the amount ‘#’-placements to only where the guard walks) on my 2011 core i-7, so I’m happy, even though it feels like I could have been smarter.
I think that’s mostly the poison talking
A study in what a pair of hands can do in a shot. Hands are a big part of a shot I’m planning, and every bit of research into how you can play with the motion helps.
Scanned top to bottom over about two minutes, open lens, two well placed tube lights to get the drama going.
This is a fairly old one, from a few months after the camera was built. An artist friend asked me to document one of his rooms, he was into installation and sculpture at the time. I agreed on the condition that I had complete freedom in how the documentation was done.
This was the second time working with this model, and she is one of the very few models I’ve worked with for whom the time shift effect has properly ‘clicked’. No direction required, just time and play. The blanket-waterfall stuck.
Scanned top to bottom in about two minutes.
The nyquist sampling theorem is a cornerstone of analog to digital conversion. It posits that to adequately preserve an analog signal when converting to digital, you have to use a sampling frequency twice as fast as what a human can sense. This is part of why 44.1 khz is considered high quality audio, even though the mic capturing the audio vibrates faster, sampling it at about 40k times a second produces a signal that to us is indistinguishable from one with an infinite resolution. As the bandwidth our hearing, at best peaks at about 20khz.
I’m no engineer, just a partially informed enthusiast. However, this picture of the water moving, somehow illustrates the nyquist theorem to me. How perception of speed varies with distance, and how distance somehow make things look clear. The scanner blade samples at about 30hz across the horizon.
Scanned left to righ, in about 20 seconds. The view from a floating pier across an undramatic patch of the Oslo fjord.
*edit: I swapped the direction of the scan in OP
cross-posted from: https://lemmy.world/post/17697235
One of the results of a collaboration with a dancer. Once the motion-aspect of scanning photography clicked with her, it was a blast playing around for a few hours. This is a quick scan, left to right in about 20 seconds.
One of the results of a collaboration with a dancer. Once the motion-aspect of scanning photography clicked with her, it was a blast playing around for a few hours. This is a quick scan, left to right in about 20 seconds.
The last shot I posted gained some traction, so I felt like sharing some more of what I’ve done with my scanner camera. The scan is done from top to bottom in about 2 minutes, the model did a great job of staying still throughout.
While scanning motion is definitely eye-catching and spectacular, there are other qualities to appreciate. The gorgeous soft, yet tack sharp aesthetic of large format photography is easily available with a scanner.
Usually I fight the IR-super sensitivity of the sensor, but this time it made her skin iridescent against the rock in the background.
Taken on a small group of Islands in the Oslo fjord, called Hvasser. A 15 meter peice of fabric playing in the wind, scanned right to left in 21 seconds. Got really lucky with the clouds this time, allowing a single beam of sunlight in as a highlight.
Haven’t seen Philosophy Tube on here yet.
High quality and engaging deep dives on various philosophy-related topics. Abigail, the face of the channel is an actor and playwright (and an academic) and that very much shines through.