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| 13:15 | vup | btw, does anybody have experience using electroluminescent panels for flatfielding?
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| 13:15 | vup | I found out astro people seem to use them, and if actually homogeneous that might be a pretty cheap way to do flatfielding
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| 13:16 | se6astian | interesting, how can we verify if a panel is actually homogeneous?
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| 13:19 | Bertl | simplest way should be to move the panel or camera in a grid style and take captures (out of focus) then compare the overall results
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| 13:21 | se6astian | sounds simple enough, great
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| 13:21 | vup | yeah not really sure :P
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| 13:21 | vup | I guess in a astro context you could compare a skylight flatfield with the flatfield produced by a el panel to get a rough idea.
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| 13:21 | vup | Also, how well are other cameras flat field calibrated? It might be enough to just image the el panel using a commercial camera. (with some difficulties around vignetting due to the lens)
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| 13:22 | vup | ah also Bertl, is it currently possible to add custom data to the raw hdmi stream?
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| 13:22 | vup | It would be nice to track the sensor registers, especially the temperature.
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| 13:23 | Bertl | there are currently as many data islands as vertical sync lines
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| 13:23 | Bertl | (so typically 5) at least one of them is used for the AVI info frame
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| 13:24 | Bertl | so 3 or 4 could be used to transmit arbitrary sideband data to the HDMI image
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| 13:25 | vup | ah I wasnt really thinking about the data island, but more adding a fake image row.
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| 13:25 | vup | Can get the contents of the data island from the magewell usb capture card?
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| 13:25 | Bertl | ah, yeah, well, you can always add overlay data to the output
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| 13:25 | Bertl | and yes, the magewell devices can retrieve the data islands
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| 13:26 | vup | only overlay, but also additional rows or columns?
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| 13:27 | Bertl | you can, for example, look at them at the config tool for the USB capture
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| 13:27 | Bertl | rows/columns only if you change the HDMI mode
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| 13:27 | vup | right, that would be fine I guess
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| 13:28 | vup | you havent by any chance already reverse engineered the usb requests for the data island? :P
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| 13:28 | Bertl | nope, but the API has functions for that IIRC
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| 13:29 | vup | ah I completely forgot about the magewell sdk
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| 13:29 | vup | will check
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