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Less than half size demosaicking

Hello everyone,
new member here. I am using Libraw (more specifically Rawpy) for an application I am prototyping and I would like to speed up the raw processing as my application processes frames in two stages, first opening images with very conservative quality settings, performing all sorts of analysis and then reopening the same images in the background with high quality demosaicking.

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14-bit highres raw images made by OMDS OM1-ii

Following the thread in German Olympus forum https://www.oly-forum.com/topic/36527-om1-markii-14bit-high-res/
I learned that the latest OMDS camera OM1-ii is able to produce highres images with 14-bit.

For test purposes I downloaded sample images from https://www.mydrive.ch/shares/99631/4904ea9e1cec1bd98cbb89ecbecdb172/bro... released by forum-member MartyMacfly.

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Adobe DNG Gainmap support or extraction

Hello,
Since this is my first message on the forum, I would like to thank you for the brilliant LibRaw library that has enabled a bunch of different great uses.

On of them is developing Adobe DNGs, produced by smartphones.

However, many, if not all phones, use something that is called a "GainMap", basically a per-channel lens correction, that gains the data based on the embedded 2D image. This helps tremendously with strong Vignetting and hue shifts produced by the tiny lenses in smartphones.

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