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David Maynard
Retired Computer Scientist: SRI-ARC (Engelbart), Xerox PARC, Xerox SDS, Electronic Arts, SGI, Google, Box
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By
David Maynard
Edited
May 19, 2024
Fork of
WASM-ImageMagick Extract Color Palette From Image
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import
{
magickImage
}
from
"@radames/wasm-imagemagick-helper"
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import
{
copyToClipboardButton
}
from
'@radames/copy-to-clipboard-button-hack'
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// d3 = require("d3@6")
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import
{
fetchImage
}
from
"@radames/wasm-imagemagick-helper"
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testImage
=
fetchImage
(
"https://pbs.twimg.com/media/F0milJeXsAANd6v?format=jpg&name=small"
)
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test2Image
=
fetchImage
(
"https://miro.medium.com/v2/resize:fit:4096/format:webp/1*hfwhejA1iwOt85ftb8gILQ.png"
)
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testImage3
=
fetchImage
(
"https://images.unsplash.com/photo-1541600321016-ac52d598f563?crop=entropy&cs=tinysrgb&fit=crop&fm=jpg&h=500&ixid=MnwxfDB8MXxyYW5kb218MHx8bmF0dXJlLGZydWl0fHx8fHx8MTY5Mzc4NzI1NQ&ixlib=rb-4.0.3&q=80&utm_campaign=api-credit&utm_medium=referral&utm_source=unsplash_source&w=500"
)
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testImage3
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testImage
.
blob
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getImageData
=
async
function
(
blob
)
{
const
bitmap
=
await
createImageBitmap
(
blob
)
;
const
{
width
,
height
}
=
bitmap
;
// an intermediate "buffer" 2D context is necessary
const
ctx
=
DOM
.
context2d
(
width
,
height
,
1
)
;
ctx
.
drawImage
(
bitmap
,
0
,
0
)
;
return
ctx
.
getImageData
(
0
,
0
,
width
,
height
)
;
}
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testData
=
getImageData
(
testImage
)
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f
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One platform
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Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
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Learn more
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colors
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svgColors
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colorsParsed
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randomInitImg
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testImage
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test2Image
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testImage3
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getImageData
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testData
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