Is this a so-called 'Hot Mirror' filter (blocks both UV and IR)?StephanB wrote:Yes agreed, mechanical moving an IR filter .During the day you filter out IR to get normal photos and at night you do not use the IR filter such that you have better night vision but the colour is a bit strange. I do not think you will be able to undo IR in software. The reason I say this is that IR hits the blue detectors do what you get with a NOIR Filter, camera is
Red detector is triggered on Red light
Green detector is triggered on Green light
Blue detector is triggered on Blue and IR light
(Basically this is a fault, as the Blue detector should trigger on Blue only. To correct this makers put in a filter to remove the IR)
The reason IR hits the blue is to do with the Harmonics of its frequency. That is most of the IR does not hits the blue but as per harmonics some of the IR triggers the blue.
In daylight if you want to avoid the IR you need an actual IR filter to remove the IR from the blue and you then have a normal camera.
Hope this helps
My Motorola XT720 does not have an IR filter (which came in handy when building an infrared remote for just confirming if the LED was lighting up) but produces perfectly normal looking images. One can only assume the processing is being done in software somewhere.ant_thomas wrote:Does anyone know of any software filters/processing to try and convert an image from the NoIR camera module to look more like a visible light image like the original camera module. If imagemagick can do it, all the better.