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Arthur T Knackerbracket [soylentnews.org] writes:

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Arthur T Knackerbracket has found the following story [hackaday.com]:

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 [blog.dzl.dk] 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 [blog.dzl.dk] 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.

The MLX90640 sensor also makes an appearance in the Open Thermal Camera [hackaday.com], one of the entries for the 2019 Hackaday Prize. If you’re interested in thermal imaging, don’t miss this teardown of a thermal imaging camera [hackaday.com].

Original Submission