3 ms·
> The only real major inconvenience using it is the fact that it constantly pauses to calibrate itself to the temperature range it is being exposed to, a proces
by ssfrr 4y ago
> The only real major inconvenience using it is the fact that it constantly pauses to calibrate itself to the temperature range it is being exposed to, a process that freezes the screen and UI for well over a second.
Does anyone know what these thermal cameras are doing when they calibrate? Normally I think of calibration as using some known reference to match your sensor data to, but it’s not clear to me what the reference would be in this case.
- BizarroLand 4y agoI don't know the precise answer, but from the article the sensor sets the coldest point in its graph range to 0 and calculates everything else from that. Given that the sensor is probably the most expensive part of this system, I bet that the FPGA or CPU that's running it is struggling to keep up with scanning 10,000 points 7 times a second to find the reference low to calculate everything else from.
- norvvryo 4y agoI believe there is an internal shutter that is moved in front of the sensor to give a uniform image, and a nearby temperature sensor to give the image an absolute temperature value.
- smitelli 4y agoIt definitely makes an audible click when it enters (and leaves) calibration mode.