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Arthur T Knackerbracket has found the following story:
Under the right circumstances, Gaussian blurring can make an image seem more clearly defined. [DZL] demonstrates exactly this with a lightweight and compact Gaussian interpolation routine to make the low-resolution thermal sensor data display much better on a small OLED.
[...] used an MLX90640 sensor to create a DIY thermal imager with a small OLED display, but since the sensor is relatively low-resolution at 32×24, displaying the data directly looks awfully blocky. Gaussian interpolation to improve the display looks really good, but it turns out that the full Gaussian interpolation isn’t a trivial calculation write on your own. Since [DZL] wanted to implement it on a microcontroller, the lightweight implementation was born. The project page walks through the details of Gaussian interpolation and how some effective shortcuts were made, so be sure to give it a look.
(Score: 4, Insightful) by c0lo on Tuesday October 01 2019, @05:08AM (6 children)
Speak for yourself (and feel free to waste your money on whatevs gizmos excite you) but abstain from judging others by your standard.
When you develop cheap (but useful) things using micro-controllers to run unassisted for days on end (sensors and what not), then less is so much better (i.e. you will be extremely happy to be able to do the same with less). At least two things that you want to consider:
* you want as low energy consumption as possible. Even better if your electronics can control the time when your sensor is on (instead of being on all the time) - may make a difference from 3 days between a changing the batteries to half a year.
* higher resolution doesn't help when you don't have too much RAM/processing power anyway (we are speaking about a range of 2-32kB of it, with a 16MHz clock)
https://www.youtube.com/watch?v=aoFiw2jMy-0 https://soylentnews.org/~MichaelDavidCrawford
(Score: 2) by hemocyanin on Tuesday October 01 2019, @05:21AM (5 children)
No kidding -- why would someone come here and denigrate a DIY electronics project? Who cares if you can buy X -- that's not the point of DIY.
(Score: 0) by Anonymous Coward on Tuesday October 01 2019, @05:55AM (4 children)
Did they make the MLX90640 sensor by hand?
(Score: 2) by c0lo on Tuesday October 01 2019, @07:43AM
Just in case you feel the need of a point, I'm happy to let you have one -> . <- here, take this one; it's guaranteed to be more to the point than your comment.
https://www.youtube.com/watch?v=aoFiw2jMy-0 https://soylentnews.org/~MichaelDavidCrawford
(Score: 2) by hemocyanin on Tuesday October 01 2019, @04:28PM (2 children)
Did you smelt the metal to build a shovel to dig the clay your morning coffee cup is made out of? People start in the middle ALL the time. Literally nobody starts from nothing.
(Score: 2) by Immerman on Wednesday October 02 2019, @12:05AM (1 child)
Well, not *literally* nobody. Some people enjoy starting from (nearly) nothing sometimes. I've got a friend that decided to make himself a goatskin drum. Step 1: knap a stone scraping tool in order to scrape the raw uncured hide...
(Score: 2) by hemocyanin on Wednesday October 02 2019, @03:47AM
I have a lot of respect for that, but he didn't start back far enough. I presume he went out and found the flint, which is great, but I suspect he drove somewhere while wearing clothes and boots and used tools to get the stone. He needs to start naked in his back yard and work up from there. Otherwise, he started in somewhere in the middle.