Jack000

84 ms·

511.
by Jack000 10y ago
I always thought this would be a great application of computational photography. Take a bunch of shots, segment stars/foreground with optical flow, then stack with no star trails.
512.
by Jack000 10y ago
Depends on your definition of lifelogging I guess, I would argue that most lifelogging happens on Facebook now. Most people don't want to automatically share every detail about their lives, they want to present a filtered, sanitized v
513.
by Jack000 10y ago
can you expand on why RGB wouldn't work? The most obvious way I can think of to include chroma information in apriltags would be to use 3 colors matched to the peak sensitivity of each channel. Does the RBG spectral sensitivity overlap
514.
by Jack000 10y ago
there's really nothing magical about bokeh that requires machine learning imo. Lens blur can be approximated perfectly (by human perceptual standards) given a good depth map, you just have to use a disk-shaped kernel instead of a gauss
515.
by Jack000 10y ago
Given a perfect depth map there is no reason lens blur can't be replicated exactly. They probably just chose some bad photos for the demo, or possibly there's some placebo effect happening. Any flaws aught to be in the depth map g
516.
by Jack000 10y ago
stereo depth still has a lot of issues - eg. if you're shooting a white wall or other feature-less object. Not sure if they have better algos but if you use an off-the-shelf stereo package from OpenCV or ROS there are lots of holes in
517.
by Jack000 10y ago
I saw it at the Staten Island ferry terminal last week, maybe because it's approaching 9/11? It had a yellow insert and said something like alert level 1. That combined with the "see something say something" ads does mak
518.
by Jack000 10y ago
As a tourist my immediate impression is that the infrastructure is quite old compared to other world cities (why are the subways so hot?) and the touristy areas are a lot dirtier than I would have expected. There are also some NY-isms that
519.
by Jack000 10y ago
HN is to Reddit as Time magazine is to People. They're the same format (and often the same links), but the comments here are generally more knowledgeable and reasoned, free from memes and sophomoric tit-for-tat arguments. The comments
520.
by Jack000 10y ago
this should be pretty easily solved with a forward/downward facing depth sensor (to identify and avoid the debris). The fact that they didn't do this says to me that debris may not have been a major problem in testing.
521.
by Jack000 10y ago
code on github: https://github.com/Jack000/bunnybot So it's a very rough proof-of-concept right now. I mainly wanted to see if this type of robot could be done on an embedded board (the Jetson TK1). It works just
522.
Show HN: Autonomous assistant robot(hackaday.com)
5 points by Jack000 10y ago|1 comments
523.
by Jack000 10y ago
by that measure we should forget about historical languages and learn something constructed like esperanto. languages are not solely a means of communication but a part of a people's cultural identity. I think the greater dependence on
524.
by Jack000 10y ago
I think it's missing a level (SL0.5 - linear) all levels above 1 assumes that the compounding effect of technology will continue into the future, but it's also possible that this growth will level off or come in spurts as major ad
525.
by Jack000 10y ago
it sounds like php might be better for you to learn on. You can put small snippets of it directly into html and have it be immediately useful without learning a bunch of other stuff.
526.
by Jack000 10y ago
is canny edge detection better than adaptivethreshold for pre-filtering the image? The AR tag implementations I've looked at all seem to use adaptivethreshold.
527.
by Jack000 10y ago
"First they ignore you, then they laugh at you, then they fight you, then you win."
528.
by Jack000 10y ago
site seems to be down? I'm guessing it's this project: https://hackaday.io/project/2552-farmbot-open-source-cnc-far...
529.
by Jack000 10y ago
I think most hackspaces are pretty beginner friendly. I'm not in the Bay area but noisebridge is pretty well-known.
530.
by Jack000 10y ago
coming from a similar background, I think the biggest difference between "robotics"/mechatronics and CS/EE is physical intuition and hands-on skills. Making small robots isn't very expensive, I'd just go to a h
531.
by Jack000 10y ago
something that I can't find much info on is the safety of laser line generators, eg: https://hackaday.com/2016/04/04/smartphone-and-ir-line-laser... intuitively the beam spread should make it much safer,
532.
by Jack000 10y ago
no op, but personally I think an increase in automation will simply push human endeavours upward in Mazlow's pyramid of needs. ie. prior to the industrial revolution most human activities were related to satisfying our physiological ne
533.
by Jack000 10y ago
the problem isn't the algorithms but the whiteboard. in my last interview I couldn't remember which of the various top/parent/offset variables defined the distance from the top of the document to the top of the viewport.
534.
by Jack000 11y ago
In Canada the alcoholics example holds because we have universal healthcare. Alcohol/tobacco is actually highly taxed because of this.
535.
by Jack000 11y ago
ROS isn't really an operating system but a framework to combine robotics-related code into one running system via a publisher/subscriber model. You'd typically run it on ubuntu as the actual OS you actually can get an (90%) a
536.
by Jack000 11y ago
http://www.cosy.sbg.ac.at/~held/projects/vroni/vroni.html when generalized to line segments, voronoi diagrams can be used to efficiently compute offset contours. Offsets are used for CNC operations, slicing 3
537.
by Jack000 11y ago
my view counter went up by 2 for the demo and 1 for the founder video. Didn't think I'd get an interview but did end up getting one.
538.
by Jack000 11y ago
Like you mentioned there are other startups doing this, and some of them are farther along eg. http://dispatch.ai/ what will Zippy do to differentiate from those robots? Why will Sprig and SpoonRocket buy a Zippy rather tha
539.
by Jack000 11y ago
As described this seems like it would be really difficult to implement. Why not a kinect peripheral that tracks a networked hair trimmer. Depending on the position of the trimmer, it turns on/off to avoid overcutting. I cut my own hair
540.
by Jack000 11y ago
you can only do this if the surface of the treadmill is an inertial reference frame. ie. a person running at constant speed vs a person on a treadmill at constant speed is functionally equivalent. However, the moment you want to stop or cha

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