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#interpolation

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Public *
Karsten Schmidt

A couple of 2017 tests/prototypes using Shepard/IDW interpolation[1] to compute "soft" voronoi cells. Reposting this after @Danpiker was mentioning this method for 3D modeling in recent days. Coincidentally, these tests were for something v. similar, i.e. outsole traction pattern geometry generation — the exponent used in this method acts an easy-to-grok parameter to control softness/sharpness & level of detail... Unlike these examples, which are only using point samples and colors, the idea was to interpolate between line geometries to create a relief surface. E.g. applied to an outsole, we could configure the interpolation to produce softer shapes in the heel region and more detailed ridges in the front foot, where traction is needed most... In the end I didn't use this specific interpolation method for performance reasons and switched to another approach to compute an SDF for v. similar results (see recent posts from yesterday).

(Alt text for more details about these animations)

[1] en.wikipedia.org/wiki/Inverse_

GIF
GIF
#ThingUmbrella#Interpolation#Image
Public
50+ Music

"Shape of You" is a song by English singer-songwriter #EdSheeran. It was released on 6 January 2017 as one of the #doubleLeadSingles from his third studio album ÷ (2017), along with "#CastleOnTheHill". The #dancehall and #RAndB-infused #popSong was written by Sheeran, #SteveMac and #JohnnyMcDaid. Due to its #interpolation of "#NoScrubs" by #TLC, #KandiBurruss, #TamekaTinyCottle, and #KevinShekspereBriggs are also credited as writers.
youtu.be/Vds8ddYXYZY

YouTubeEd Sheeran - Shape Of You (Lyrics)By SyrebralVibes
Public
50+ Music

"Shape of You" is a song by English singer-songwriter #EdSheeran. It was released on 6 January 2017 as one of the #doubleLeadSingles from his third studio album ÷ (2017), along with "#CastleOnTheHill". The #dancehall and #RAndB-infused #popSong was written by Sheeran, #SteveMac and #JohnnyMcDaid. Due to its #interpolation of "#NoScrubs" by #TLC, #KandiBurruss, #TamekaTinyCottle, and #KevinShekspereBriggs are also credited as writers.
youtu.be/_dK2tDK9grQ

Public
💧🌏 Greg Cocks

USDA Updates Plant Hardiness Map For The First Time In More Than A Decade
--
npr.org/2023/11/24/1215057967/ <-- shared media article
--
planthardiness.ars.usda.gov/ <-- shared 2023 USDA map
--
“The USDA Plant Hardiness Zone Map is the standard by which gardeners and growers can determine which perennial plants are most likely to thrive at a location. The map is based on the average annual extreme minimum winter temperature, displayed as 10-degree F zones and 5-degree F half zones. A broadband internet connection is recommended for the interactive GIS-based map above.
To find the Plant Hardiness Zone at your location quickly, enter your zip code in the Quick Zip Code Search box in the map above, or click anywhere on the map to view the corresponding interactive map…”
#GIS #spatial #mapping #growers #gardeners #map #USA #model #modeling #interpolation #plant #planthardiness #USDA #PlantHardinessZoneMap #new #2023 #2012 #1990 #climatechange #warming #perennials #interactivemap
@USDA

photo - new seedling
map - 2023 USDA Plant Hardiness Zone Map, USA
map - 2023 USDA PLant Hardiness Zone Map, USA - 2023 vs 2012 changes
map - 2023 USDA PLant Hardiness Zone Map - Pacific Northwest (PNW)
Continued thread
Public *
Karsten Schmidt

Updated the gradient image generator example to use a custom pixel format (using Oklab color space) for the floating point pixel buffer.

Using Oklab instead of RGB combined with the bicubic image interpolation used to compute the gradient image means the colors will also be interpolated in the Oklab space which is perceptually better & more correct than RGB and leads to more pleasing results...

Demo & source links are updated (see OP)

TypeScript source code of the custom pixel format definition: // define a custom pixel buffer format to store pixels in the Oklab color space: // using Oklab instead of RGB combined with the bicubic image interpolation used // to compute the gradient image means the colors will also be interpolated in // the Oklab space (which is perceptually better [more correct] than RGB and // leads to more pleasing results)... const FMT_OKLAB = defFloatFormat({ // technically, we're not using the alpha channel here, but it makes it // easier to handle alpha: true, // channel order channels: [3, 2, 1, 0], // custom conversions to & from packed integer ABGR format (needed for HTML canvas) convert: { // convert: 32bit int -> sRGB -> Oklab fromABGR: (x, out) => convert(out || [], intAbgr32Srgb([], x), "oklab", "srgb"), // convert: Oklab -> sRGB -> 32bit int toABGR: (x) => srgbIntAbgr32(convert([], x, "srgb", "oklab")), }, }); // ...then use as format with floating point pixel buffers like so: const img = floatBuffer(width, height, FMT_OKLAB)
#ThingUmbrella#Oklab#Color
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