Artem vs. Predator

#1

Post by sharpn » Thu, May 12, 2016, 7:25 PM UTC

Artem vs. Predator
ribbonfarm.com

Re: Artem vs. Predator

#2

Post by mmastrac » Thu, May 12, 2016, 9:36 PM UTC

This is a great story, but the original title of "Artem vs. Predator" is much better than the submitted one.

Re: Artem vs. Predator

#3

Post by t_fatus » Fri, May 13, 2016, 7:40 AM UTC

Never Give Up.. This should have take SOOOOO long, with so many disaopointment ! Really nice job

Re: Artem vs. Predator

#4

Post by clort » Fri, May 13, 2016, 7:51 AM UTC

t_fatus wrote: post #3

Never Give Up.. This should have take SOOOOO long, with so many disaopointment ! Really nice job

I got the feeling this did take a long time, he mentions things becoming available, and technology changing.

"This project spans years, and when I started there were no 3D printers. Eventually I made one"

Re: Artem vs. Predator

#5

Post by taneq » Fri, May 13, 2016, 7:52 AM UTC

Great read! I'm curious about the last bit, saying you need liquid nitrogen cooling to detect the radiated heat from a human. I'd always thought some snakes have infrared-sensitive spots near their mouths that could sense mammals from a distance, are they just that much more sensitive than a photodiode? Or are they sensing something else?

Re: Artem vs. Predator

#6

Post by stared » Fri, May 13, 2016, 7:53 AM UTC

It is possible to see in near infrared - just use a IR filter (used for photography), and stick it to your eye. Everything should look dim and reddish, but what is characteristic (and different from a red filter) is that leaves are very bright. Also, many black t-shirts are not-dark.

Also, it's fun to make such photos:

http://migdal.zenfolio.com/ir-old

Re: Artem vs. Predator

#7

Post by david-given » Fri, May 13, 2016, 7:54 AM UTC

stared wrote: post #6

It is possible to see in near infrared - just use a IR filter (used for photography), and stick it to your eye. Everything should look dim and reddish, but what is characteristic (and different from a red filter) is that leaves are very bright. Also, many black t-shirts are not-dark. Also, it's fun to make such photos: http://migdal.zenfolio.com/ir-old

Just be really, really careful about sunlight! When you're using a filter like this your iris is wide open, and exposure to direct sunlight or reflected direct sunlight can damage your eyes.

Re: Artem vs. Predator

#8

Post by ommunist » Fri, May 13, 2016, 8:03 AM UTC

Great read. Tireless enhancements until goal achieved. Great job.

Re: Artem vs. Predator

#9

Post by venomsnake » Fri, May 13, 2016, 8:06 AM UTC

taneq wrote: post #5

Great read! I'm curious about the last bit, saying you need liquid nitrogen cooling to detect the radiated heat from a human. I'd always thought some snakes have infrared-sensitive spots near their mouths that could sense mammals from a distance, are they just that much more sensitive than a photodiode? Or are they sensing something else?

Snakes are seeing in the closest to visible specter IR IIRC. Also they have evolved a lot of other sensory mechanisms to detect pray - sounds, vibrations, taste

Re: Artem vs. Predator

#10

Post by micheljansen » Fri, May 13, 2016, 8:19 AM UTC

A cool property of NIR filters is that they are able to produce a relatively recognisable picture of the world with all screens (TFT, projected) filtered out. I've used this in the past for computer vision to do object recognition on top of a projected display without having to programmatically filter out the projection.

It's also pretty easy to make a rudimentary NIR filter by layering a red, green and blue filter on top of each other: the resulting filter will not allow any visible light through (e.g. red, green or blue), only the "rest".

edit: and they make your eyes look really creepy too (not me in the picture btw): https://flic.kr/p/6CYzDZ