Interlaces raw pixel buffers from two or more images either horizontally or vertically for lenticular printing purposes.
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║###########║ ║///////////║ ║###########║
║###########║ ║///////////║ ║///////////║
║###########║ + ║///////////║ = ║###########║
║###########║ ║///////////║ ║///////////║
║###########║ ║///////////║ ║###########║
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A raw pixel buffer is an image's pixels as a long list of flat channel data.
2*2 px 3 channels
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║(255,0,0) (255,255,0)║
║(64,64,0) (255,0,255)║
║(255,0,0) (255,255,0)║
╚═════════════════════╝
= Buffer [255,0,0,255,255,0,64,64,0,255,0,255,255,0,0,255,255,0]
npm install lenticular-interlacer
const Interlacer = require('lenticular-interlacer');
// Construct an Interlacer instance
const interlacer = new Interlacer(
60, // LPI - Lenses per inch
600, // DPI - DPI in which it will be printed
true // Orientation - horizontal/vertical: true/false
);
// Add an image to be interlaced
interlacer.push(
myBuffer, // Raw pixel buffer
3, // Number of channels (RGB = 3, RGBA = 4)
200, // Image width
100, // Image height
);
// ...add another
interlacer.push(anotherBuffer, 3, 300, 300);
// Interlace
const {
buffer,
channels,
width,
height,
} = interlacer.interlace();const Interlacer = require('lenticular-interlacer');
const sharp = require('sharp');
// Source images:
// image1.jpg 400x400 RGB (3 channels)
// image2.png 500x500 RGBA (4 channels)
Promise.all([
sharp('image1.jpg').raw().toBuffer(),
sharp('image2.png').raw().toBuffer(),
])
.then(([image1, image2]) => {
const interlacer = new Interlacer(
61,
366,
true
);
interlacer
.push(image1, 3, 400, 400)
.push(image2, 4, 500, 500);
const { buffer, channels, width, height } = interlacer.interlace();
// Produce a 400x400 RGB TIFF image in 366 DPI
return sharp(buffer, { raw: { width, height, channels } })
.tiff({
// TIFF DPI is set in dots per mm
xres: 366 / 2.54,
yres: 366 / 2.54,
})
.toFile('output.tiff');
});MIT