• #raw12 of the 3 color targets, with nicely bracketed range from blown out to dark lit by direct sun 5000k ...es/darkframes.sh (one dark frame at each setting). These are just to check dark current levels, not for calibration.
    9 KB (1,158 words) - 11:45, 7 February 2016
  • --dchp : Measure hot pixels to scale dark current frame<br /> --no-darkframe : Disable dark frame (if darkframe-xN.pgm is present)<br />
    7 KB (924 words) - 12:09, 14 October 2018
  • ...ke sure your Beta is running in experimental 4k raw mode (1080p60 with A+B frames) ...m for a few seconds, where it will alternate between two frames. These two frames will be from the same raw data as image.raw12, so they contain all that's n
    1 KB (205 words) - 17:53, 2 May 2016
  • ...art, exposed at 30 ms (normal exposure) and 100 ms (overexposed). A little dark in the lab today, but shouldn't be a big problem. ...st of the noise in these curves seems static (correctable with calibration frames)
    9 KB (1,323 words) - 16:01, 26 June 2018
  • * Dark frame subtraction. * dark current compensation.
    19 KB (2,972 words) - 05:24, 19 March 2018
  • That's right - when exposure time increases, very dark pixels become even darker! Also note the black level, after correcting the image with dark frames and black reference columns, is set to 128 (the entire image is adjusted by
    11 KB (1,751 words) - 16:01, 12 November 2018
  • ...between different frames, so we can't remove it using a calibration frame (dark frame or whatever). ...rum of the black columns, compared to the spectrum of the row noise from a dark frame, revealed a strong fixed-frequency component present only in the blac
    15 KB (2,074 words) - 08:54, 4 October 2021
  • We will use two types of calibration: '''sensor profiling''' (e.g. dark calibration, response curves, gain corrections, all that's needed to get a These 3 files allow computing a dark frame for every gain/expo/temperature combination (at least in theory), and
    6 KB (803 words) - 20:05, 2 March 2018
  • # turn off all lights in the room - do this at night or in a completely dark room Take 64 dark frames at 10ms, gain x1 with the following script executed on your PC (1.2 GB need
    11 KB (1,644 words) - 07:13, 20 May 2020
  • - they are optional, but gain/clip frames require a dark frame - black ref columns will also be subtracted if you use a dark frame.
    7 KB (920 words) - 15:06, 14 May 2020
  • '''Note:''' This experimental raw mode works only in 1080p60 (A+B Frames) and is only tested with the Atomos Shogun currently. ...ke sure your Beta is running in experimental 4k raw mode (1080p60 with A+B frames)
    7 KB (1,247 words) - 17:05, 5 April 2021
  • * [[Black Calibration]] - Dark frames / Dark currents. [[Category:Dark frames]]
    904 bytes (104 words) - 14:29, 19 July 2020
  • # turn off all lights in the room - do this at night or in a completely dark room Take 64 dark frames at 10ms (~1.2GB), gain x1 with the following script executed on the Beta:
    11 KB (1,708 words) - 11:15, 14 May 2020