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Old 22nd November 2012, 19:47   #21  |  Link
martin53
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mt_lutspa()
Thanks, Didée - I'm just learning v2...
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Old 22nd November 2012, 19:56   #22  |  Link
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I don't see any sensible interpretation for the rgba values except when using x="x" and y="y" - in which case it may as well be a separate filter (maybe in the same DLL, but a separate keyword - rgbaremap). Plus, I already used the variables a and b
Absolutely! you are the author, you decide. Just suggestions and raw ideas.
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Old 16th March 2015, 22:58   #23  |  Link
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Version 0.3 adds a "static" parameter - set this to true to make non-animating remaps much quicker.
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Old 17th March 2015, 08:48   #24  |  Link
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Version 0.3 adds a "static" parameter - set this to true to make non-animating remaps much quicker.
Wow, it's incredebly much faster!
My script (2.7K video from GP3BE) now opens little bit slower (22 seconds in comparison to 6 seconds with xyremap v.0.2), but it runs MUCH faster - 6.8 fps in comparison to 0.18 fps with xyremap v.0.2.
It's almost 40 times faster! Incredebly!
Thanks, davidhorman! Perfect filter!

By the way, do you have plans to add another interpolations to existing bicubic and nearest-neighbour. Let's say Lanczos or Spline? I think it can make pictures little bit sharper right after conversion, isn't it?
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Old 23rd August 2015, 21:17   #25  |  Link
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New version, if anyone cares!

Download beta: xyremap0.4beta.zip v0.4 (beta)

Changes include, but are not limited to, the following:
  • It's faster - at least twice as fast as before*, and gets faster as the formulae get more complicated (but "static" remaps are no quicker)
  • You can now set and recall your own variables:
    • "@A" will store the top value on the stack to variable A
    • "@A^" will store the value and pop it off the stack
    • Variables are case-sensitive, and all the built-in ones are lower case, so sticking to upper case will ensure you never overwrite them.
  • "dup" duplicates the top stack value (use this with * instead of ^ for integer powers, it's much quicker)
  • "swap" swaps the top two stack values
  • "round", "floor" and "ceil" do what you'd expect
  • "neg" - "x neg" returns -x

*it incorporates an RPN-to-x86 compiler, for those (if any) interested in such technical details

It also now has comparison and conditional operators:

"<", ">", "<=", ">=", "==", "!=" each return 1 if true of 0 if false.
"[x] [y] [cond] ?" returns x if cond is non-zero, otherwise it returns y.

Real example: "10 20 x y < ?" - returns 10 if x<y, otherwise 20.

For now there are no boolean operators, but you can hopefully simulate them with mathematical operators.

This is a beta, so use at your own risk.

Any questions?

*tumbleweeds*
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Old 23rd August 2015, 23:02   #26  |  Link
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Your link points to http://horman.net/avisynth/download/xyremap0.3.zip
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Old 23rd August 2015, 23:12   #27  |  Link
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Aha, so, spotted that did you?

(fixed)

And just in case:

http://horman.net/avisynth/download/xyremap0.4beta.zip
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Old 30th August 2015, 19:57   #28  |  Link
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I've uploaded yet another new version (0.5). It fixes a minor bug (one of the variables was being set to an incorrect value), adds a couple of new RPN operations (which I've now detailed properly here) and the bicubic interpolation is now (approximately) gamma-aware.

http://horman.net/avisynth/download/xyremap0.5beta.zip
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Old 30th August 2015, 23:59   #29  |  Link
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Thank you Mr David, Have I ever told you that you are such a wonderful fellow ?
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"Some infinities are bigger than other infinities", but how many of them are infinitely bigger ???
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Old 31st August 2015, 01:15   #30  |  Link
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Oh, now, stop it, you'll make me blush. It's just nice to know someone other than me is getting some use out of this.

I still feel the whole RPN thing may be a little opaque, so if anyone does have any "how would I do this" or "can I do this" questions...
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Old 31st August 2015, 01:37   #31  |  Link
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A "gallery" of visual effects, with source code (like your first post), would help get us started.

A infix-to-postfix converter (like Masktools' mt_polish) would help code readability a lot, at least for those of us who do not think in RPN.

A GUI with realtime preview and code generation would be great, but that's too much to ask
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Old 31st August 2015, 06:39   #32  |  Link
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A "gallery" of visual effects, with source code (like your first post), would help get us started.
Good idea! Here's 'waves' from the OP:


I'll try to make a vortex GIF tomorrow .
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Old 28th January 2017, 19:10   #33  |  Link
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Bump for a 64-bit version request.
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Old 28th January 2017, 19:36   #34  |  Link
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Easier said than done, since it's not a simple case of just recompiling with a different target architecture. It's on my list to do soon, though.
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Old 21st July 2019, 18:51   #35  |  Link
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Good idea! Here's 'waves' from the OP:


I'll try to make a vortex GIF tomorrow .
Fixed Reel.Deel image posts (Reel.Deel, just need change PostImage.org to PostImage.cc)
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Old 21st July 2019, 22:15   #36  |  Link
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Well they worked four years ago when he first posted 'em.

An x64 version is still on my list, but unfortunately I've messed around with my RPN library so much that xyremap won't currently compile a working version.
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Old 21st July 2019, 22:39   #37  |  Link
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At least one of your images (2nd post in fusion thread) has broken Imageshack link, dont know if fixable like PostImage links.

Its enticing to use common library, but any change can kill stuff, so I generally dont use, I usually copy paste relevant stuff and make changes
where required. Neither way is ideal.
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Old 9th December 2019, 11:07   #38  |  Link
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I believe one could use this filter to simulate a kind of "fisheye scaler" as used in some "smart" TV sets to anamorphically scale 4:3 video up to a 16:9 canvas, where the center remains mostly undistorted, and the borders are pulled to the sides, as if you are inside a cylinder the video gets projected on.

I just need to calculate a convenient formula to resample a 704 or 720 pixels wide centered line to a length of 1024 pixels (I guess a "viewing angle" parameter could control the amount of distortion here). And then transform it into UPN.
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Old 9th December 2019, 12:42   #39  |  Link
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I believe one could use this filter to simulate a kind of "fisheye scaler" as used in some "smart" TV sets to anamorphically scale 4:3 video up to a 16:9 canvas, where the center remains mostly undistorted, and the borders are pulled to the sides, as if you are inside a cylinder the video gets projected on.
Unless you need something more complicated, have you come across WarpedResize?
https://forum.videohelp.com/threads/...th#post2314433
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Old 9th December 2019, 13:04   #40  |  Link
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Looks even better.
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