image-dilate v0.0.114

image-dilate

dilate / expand the pixels in a color image

works directly on [r,g,b,a ... ] data array

Installation

npm i image-dilate

Usage

Here we load pixel data from a PNG file, dilate it a few pixels, then save the result.

See results below.

var dilate = require('image-dilate');
var img = require('image-sync').read('./dilate.png'); //{width, height, data, saveAs}

//img.data has format [r,g,b,a, r,g,b,a ... ]

//dilate the image
var radius = 16;
var bgColor = [0,0,0]; //background color [r,g,b] in range 0...255 [background is not dilated]
img.data = dilate.dilateColors(img.data,img.height,img.width,bgColor,radius);

//save the result
img.saveAs(`./output.png`);

Results enlarged 2x

original

dilated 1px

dilated 2px

dilated 4px

dilated 8px

dilated 32px

See Also

• image-blur-gaussian - fast gaussian blur
• image-sync - synchronous image reader/writer