https://www.nichi-doku.de/en/tags/colour/Recent content in Colour on 庭 — a journalHugoen-USFri, 16 Oct 2026 00:00:00 +0000https://www.nichi-doku.de/en/werkstatt/backgroundneutralization/Fri, 16 Oct 2026 00:00:00 +0000https://www.nichi-doku.de/en/werkstatt/backgroundneutralization/<p>BackgroundNeutralization adjusts the colour channels so that the background of a colour image becomes neutral (R ≈ G ≈ B). Unlike a colour calibration, it does not set a white balance for the object.</p>https://www.nichi-doku.de/en/werkstatt/scnr/Fri, 16 Oct 2026 00:00:00 +0000https://www.nichi-doku.de/en/werkstatt/scnr/<p>SCNR (Subtractive Chromatic Noise Reduction) limits one colour channel, usually green, to the level of the other two. This corrects greenish colour errors – but can also distort real signal if the object actually contains green components.</p>https://www.nichi-doku.de/en/werkstatt/spcc/Fri, 16 Oct 2026 00:00:00 +0000https://www.nichi-doku.de/en/werkstatt/spcc/<p>SpectrophotometricColorCalibration (SPCC) uses Gaia spectra to compute how each star should appear through the filters and sensor used, compares this with the image and derives the channel factors from it. It also neutralises the background.</p>