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Darktable sharpen9/21/2023 ![]() ![]() You can easily explore why the mainstream software developers usually lock in your processing order some things just shouldn't be done before/after others.įor sharpening, I just implemented a simple 3x3 USM with a 0-10 "strength" scale, no radius or sigma or other control "flexibility" like that. It's dirt simple, but you open the image and apply whatever sequence of operations you desire, in whatever order you desire. the blur radius of a gaussian blur, low pass filter etc?Īnd thus one of the reasons I wrote my own software. In dt's terms: where the resizing is located in the pixelpipe.Īlso how does resizing affect other operations where you use some sort of pixel-based parameter, e.g. I just went looking, darktable apparently will allow you to apply a 'style' at 'export selected' that can contain the appropriate sharpen operation.:įor me it's also not clear, when dt does the resizing. It's been a while since I looked, but IIRC Raw Therapee has a separate resize sharpening option that respects the intended order of application So you really want that output sharpening to occur after the resize. The initial sharpening isn't addressing the post-resize problem, which is that even the best of the typically available resizing algorithms impact edge acuity. What would you suggest that I do? Any advice you can provide would be great! But, that would give me an inferior result, wouldn't it?Īnyway, I am curious what others do to prepare images for the web with darktable. I could increase the amount of initial sharpening before the resize. It seems odd that I'd have to do that though. Now, I could run the exported files through another application to apply the post-resize sharpening. It would seem to me that it would be best to apply additional sharpening after the resize not before. Unfortunately, what I've found is that this style appears to be applied before the resize operation. I've created a style with an additional unsharp mask. I see that darktable lets me apply a style that is performed during the export. I've been pretty happy with the results but I am thinking that an additional sharpening step would be a good idea. I usually export as 900x900 with no additional sharpening. ![]() I tend to shoot with a square aspect ratio which gives me files of about 3000x3000 from my camera. When I zoom in to 1:1, that looks decent to me with my subject matter, so I have not changed the values. I use darktable (currently 2.2.3) to develop my raw images which I then export for use on the web.īy default, an unsharp mask is applied to the unresized image with a radius of 2.0, amount of 0.5, and a threshold of 0.5. ![]()
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