![]() I say that with a degree of reservation though, because: If truth be told – and this is only my opinion – Lightroom is by no means the best raw file processor in existence today. It’s a common problem in Lightroom, and it’s the single biggest reason why, for example, landscape exposure blends using luminosity masks fail to work quite as smoothly as you see demonstrated on the old Tube of You. And why something we have to pay for uses a methodology worse than something we get for free, God only knows. Let’s call a spade a bloody shovel and be honest – Lightrooms demosaicing algorithm is in need of an overhaul. And while it works in an acceptable manner for the majority of shots from an ever burgeoning mass of digital camera sensors, there will ALWAYS be exceptions. There is no way of altering the base demosaic in Lightroom – it is something of a fixed quantity. All told, there are 10 different demosaic options in RT, though some of them are a bit ‘old hat’ now. ![]() In this instance, it’s using its default AMaZE (Alias Minimization & Zipper Elimination) algorithm. Raw Therapee on the other hand, has a selection of demosaicing algorithms to choose from. It is a direct result of the demosaicing algorithm that Lightroom uses. The halo in Lightroom is not a sharpening halo, but a demosaicing artifact that LOOKS like a sharpening halo. What do we see on the Lightroom shot at 800%?Ī sharpening halo, but hang on, there is NO sharpening being applied. Let’s hand that file to two raw converters, Lightroom and Raw Therapee: Now we have a raw file, taken with a sharp lens and focused to perfection. So we will take it as a given, that the lens is sharp, and the operator isn’t quite so daft as they look! “But Andy, surely the first item should be the lens” I here you say.Īnd if that were the case, then we would go one step further than that, and say that it’s the operators ability to focus the lens! ![]() And our first ‘port of call’ with regard to all three of those items is ‘demosaicing’ and raw file conversion. ![]() I’m not even going to attempt to list them all here, because that would be truly frightening for you.īut sharpening is all about pixels, edges and contrast. What are the properties of an image that can determine your approach to sharpening? Well, here’s the bad news – there isn’t !Įven if you shoot the same camera and lens combo at the same settings all the time, your images will exhibit an array of various properties.Īnd those properties, and the ratio/mix thereof, can, and will, effect the efficacy of various sharpening methods and techniques.Īnd, those properties will rarely be the same from shoot to shoot.Īdd interchangeable lenses, varied lighting conditions, and assorted scene brightness and contrast ranges to the mix – now the range of image properties has increased exponentially. A lot of people imagine that there is some sort of ‘magic bullet’ method for sharpening images. ![]()
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