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Ed Harvey

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Posts posted by Ed Harvey

    Ed Harvey Effects v 5.0 (2022-12-24)

    in Plugin Packs

    Posted

    4 hours ago, Tuckeroo said:

    Just wondering if this is the proper place to request some extra "shapes" in the halftone plugin. I would love to see a spiral shape and concentric circles shape please. Is that a possibility?

     

    Thanks

    Sorry, No... not in the current implementation, as this deals with small, repeating, cells.

    Theoretically it would be possible to create an effect like that but it would require almost a complete re-write 😔

    • Like 1

    Ed Harvey Effects v 5.0 (2022-12-24)

    in Plugin Packs

    Posted

    On 1/19/2023 at 7:11 AM, Snug said:

      

    Hi there, I'm new to this forum and was using your plugin pack and find it AMAZING, but this specific feature I REALLY love. What does it actually do? I googled Vitrious but couldn't find anything that talked about image processing. 

    TBH it's been soooo long since I made it (about 15 years ago😲) that I have no memory of why it is called that! 

    Knowing me, it was probably a 'placeholder' name because I couldn't think of a descriptive one, and I never got around to thinking of something better 🙄

    I just had a look at the code to refresh my memory of what it does, and it's kind of tricky to explain..... (hence why I couldn't think of a good name)

     

    very simplistically, it increases the brightness of the hue selected and darkens the color on the opposite side of the color wheel. BUT, it does this in a way that is somewhat non-linear, so the results are rather 'non-intuitive'.

    Basically you just play around with the controls and it does odd things to colors 🤪

    • Like 2

    Ed Harvey Effects v 5.0 (2022-12-24)

    in Plugin Packs

    Posted

    At long last I managed to find time to update things and (hopefully) fix all the accrued UI issues 🙂

     

    There is no new functionality, but some effects (mostly distorts) have been converted to use the current PdN effects UI rather than their former custom UIs.

    (This should reduce the need for future breakages)

     

    The latest version of the Ed Harvey Effects package is available here:  EdHarveyEffects.zip

    • Like 3
    • Hooray 2

    Ed Harvey Effects v 5.0 (2022-12-24)

    in Plugin Packs

    Posted

    What is the mathematics behind multiview warp plugin? I mean, in the first sight, what does it do? What kind of bigger transformation group (affine? distance-conservative? or hard-to-define? :D) does it belong to? I don't want the exact code, if you want to keep it in secret, but a drafty description about its nature, if possible, in mathematical terms.

    sorry for the slow reply on this one, I only just noticed it...

    If I remember correctly, it's a relatively simple transform, the mapping is something like...

    for a given pixel at x,y (where x and y are relative to the center of the image)

mx = (size * Math.Floor(x / size) + size / 2);
my = (size * Math.Floor(y / size) + size / 2);

ix = (mx - x) * shift;
iy = (my - y) * shift;

pixel at x-ix maps to x, and y-iy maps to y
    so basically it divides to image into squares, and maps shifted/scaled sections of the image into each square...

    hope that helps :)

    Ed Harvey Effects v 5.0 (2022-12-24)

    in Plugin Packs

    Posted

    The soft saturation effect is missing. It's not in the "Adjustments" category

    Hmmm, you're right - sort of...

     

    Somewhere in the mists of time (I haven't done any real work on these plugins in ages) it somehow got renamed Vibrance   :/

    I'll see if I can find the time in the next few days to rename it back... In the meantime, you now know where to find it :)

     

    Edit: On second thoughts, I think I'll leave it as is...

    Ed Harvey Effects v 5.0 (2022-12-24)

    in Plugin Packs

    Posted

    It's very difficult to specify exact settings to duplicate standard filters as there are many variables (for example, camera response and white balance) which can effect the final picture look. Also, some of the standard filters have complex responses which are not possible to exactly model after the original light spectrum has been sampled to the 3 primary colors :(

    It's usually best to just play with the settings until you get the desired result.

    Having said that, the example you gave, Red 25, is actually easy as it blocks everything but Red - so Hue 0°, strength 100% :)

    If you have other specific filters for which you require settings, I probably have that info archived away somewhere at home.

    Just let me know which ones you are interested in, and I'll see if I can find it...

    Bilateral filter - edge preserving noise reduction and blur

    in Plugins - Publishing ONLY!

    Posted

    Apparently Bilateral filter may produce similar results as Noise reduction or Surface blur effects. It's hard to draw direct comparison (I'm not aware of internal implemetation details of standard effects) but I may present my subjective comparison of images produced.

    Paint.Net's Surface Blur is, in fact, a variant of the classic bilateral filter.

    It just uses different range functions, which (with an algorithmic sleight of hand) allow it to be calculated in roughly O(n) rather than O(n²) :)

    Ed Harvey's FastFx

    in Plugin Packs

    Posted

    That's really good to know actually. I kept comparing it to ray tracing (similarity but probably not that close) and since it doesn't use the GPU ...

    For every pixel in the effect output it has to examine (#splinters × distance) pixels and, unlike blurs, there are no neat mathematical 'tricks' that one can use to reduce that number :(

    • Upvote 2

    Ed Harvey's FastFx

    in Plugin Packs

    Posted

    Now if only someone can make splinter blur faster I think I'd be set for a while. (Not hinting, just thinking out loud as its painfully slow for me.)

    I did have a look at it a while back, but there isn't much that I can do to improve the performance; It's just an expensive effect! :(

    • Upvote 1

    Ed Harvey's FastFx

    in Plugin Packs

    Posted

    Ooops. Apologies all around. Looks like I was off the mark there in regards to this being considered potentially eclipsed (barring the exception of the hue/sat in some ways).

    New link works. Much appreciated.

    No worries.

    I have been lamentably negligent in checking the forums in recent times... :/

    Ed Harvey's FastFx

    in Plugin Packs

    Posted

    So are these fastFX not included in Ed Harvey Effects v 3.5 http://forums.getpaint.net/index.php?/topic/18811-ed-harvey-effects-v-35/ and if not why not?

    The reason that they are not in the main pack is that they are somewhat more experimental, and they duplicate functionality in PdN (albeit faster versions).

    These effects trade memory consumption for speed and so it is possible (although generally unlikely) that they could fail in machines with low installed memory, or if the image is very large...

    • Upvote 1
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