Hallöchen! Marie-Noëlle Augendre writes:
> Just installed the 2.0.1 version from Germano repo so I can now > work on pictures taken by a Canon G5X. However, pictures seem to > have some real vignetting: see > https://lh3.googleusercontent.com/-djMhsJelGiU/VshkmYytA0I/AAAAAAAADi8/JJumqTCJpBE/s2048-Ic42/20160220_darktable_002-1000px.jpg > > In other softwares, such as Digikam here: > https://lh3.googleusercontent.com/-XlvSUg2Q0vQ/VshmqEmYzKI/AAAAAAAADjU/7GW6vEiFu0A/s2048-Ic42/20160220_digiKam_001-1000px.jpg > or the RAW viewer I use on Android, there is no vignetting but the > image appears a bit smaller, as it had been cropped, As Pedro has already pointed out, modern zooms tend to produce black corners at short focal lengths. They do so because at the same time, they heavily distort, and if you remove this distortion, the black corners vanish as well. The digiKam image has been already corrected, and the DT image not. > Curiously, the sizes in pixels are the same in both darktable and > Digikam: 5632 x 3710 pixels, and a bit smaller on Android: > 5636x3693. digiKam corrects distortion and crops so that no black fringe appear. The correction formula of Lensfun assures that the image size remains the same then, assuming that the aspect ratio is supposed to be kept. Tschö, Torsten. -- Torsten Bronger Jabber ID: torsten.bron...@jabber.rwth-aachen.de ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Darktable-users mailing list Darktable-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/darktable-users
