Marvin-TS

Marvin-TS is Typescript version of Marvin Image Processing Framework with some more features and updates.

Tutorial

Install

You can install from npm or yarn

NPM

npm i marvin-ts

Yarn

yarn add marvin-ts

Image Loading

The first step to use Marvin-TS is load a image.

   import { MarvinImage } from "marvin-ts"

   // load from remote image
   let url = "http://ww.exemple.com/image.jpg";
   const image = await new MarvinImage().load(url);

   // or load from local image
   let url2 = fs.readSyncFile("image.png");
   const image2 = await new MarvinImage().loadFromBase64(url2);

Marvin instance

Before load image you need create a new Marvin instance

   import Marvin, { MarvinImage } from "marvin-ts"
   ...
   ...
   // image is the MarvinImage instance the you create before
   const marvin = new Marvin(image);

   // Now you can use all features of Marvin-TS

Features

Blur

   // gaussian blur
   marvin.gaussianBlur(10)

Color

   // Average color
   marvin.averageColor()

   // Black and white
   marvin.blackAndWhite(50)

   // Brightness and Contrast
   marvin.brightnessAndContrast(50, 50)

   // Emboss
   marvin.emboss()

   // Gray scale
   marvin.grayScale()

   // Heat map
   marvin.heatMap(10)

   // invert colors
   marvin.invertColors()

   // Posterization
   marvin.posterize(10);

   // Thresholding
   marvin.thresholding(10);

   // Serpia
    marvin.sepia(5);

   // Color channels
   marvin.colorChannel("#fefc58", 20);

Combine

   // Combine by alpha
   marvin.combineByAlpha(image3, 10, 20)

   // Merge photos
   marvin.mergePhotos([image3], 10);

Corner

   // Moravec corner detector
   marvin.moravec(5, 500);

Draw

   // Circle
   marvin.drawCircle(10, 10, 20);

   // Regular curve
   marvin.drawCurve(10, 10, 20, 20, 30);

   // Quadratic curve
   marvin.drawQuadraticCurve(10, 10, 20, 20, 30, 30);

   // Cubic curve
   marvin.drawCubicCurve(10, 10, 20,20, 25,35, 30,30);

   // Ellipse
   marvin.drawEllipse(10, 10, 20, 20);

   // Line
   marvin.drawLine(10, 10, 20, 20);

   // Rectangle
   marvin.drawRect(10, 10, 20, 20);

   // Star
   marvin.drawStar(10, 10, 20, 20);

   // Start path
   marvin.pathStart(10, 10);

   // Line to
   marvin.lineTo(10, 10);

   // Quadratic curve to
   marvin.quadraticCurveTo(10, 10, 20, 20);

   // Cubic curve to
   marvin.cubicCurveTo(10, 10, 20, 20, 30, 30);

   // Regular curve to
   marvin.curveTo(10, 10, 20, 20);

Edge

   // Prewitt edge detector
   marvin.prewitt(1);

   // Sobel edge detector
   marvin.sobel(1);

   // Canny edge detector
   marvin.canny(100, 500);

Text

   // Find text
   marvin.findTextRegions(10, 20, 5, 40);

   // Write text on image
   marvin.write("Exemple", 10, 20);

Restoration

   // Noise reduction
   marvin.noiseReduction(10);

Segment

   // Crop image
   marvin.crop(10, 20, 30, 40); 

Transform

   // Flip horizontal
   marvin.flipHorizontal();

   // Flip vertical
   marvin.flipVertical();

   // Flip horizontal and vertical
   marvin.flipBoth();

   // Rotate
   marvin.rotate(90);

   // Scale
   marvin.scale(2, 2);

Get or save

   // Get back Marvin image after process
   marvin.flipVertical().output();

   // Save image as JPEG or PNG
   marvin.save("output/image.png");   

Chains

   // Easily run as many functions as you want with function chains
   marvin.flipBoth()
   .scale(2, 2)
   .noiseReduction(10)
   .drawRect(10, 10, 20, 20)
   .save("out")

IMPORTANT! Chains run only in functions that return a marvin instance

This project is a fork of MarvinJ