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templateMatching.js

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const cv = require('../');

const findWaldo = async () => {

// Load images

const originalMat = await cv.imreadAsync(`${__dirname}/../data/findwaldo.jpg`);

const waldoMat = await cv.imreadAsync(`${__dirname}/../data/waldo.jpg`);

// Match template (the brightest locations indicate the highest match)

const matched = originalMat.matchTemplate(waldoMat, 5);

// Use minMaxLoc to locate the highest value (or lower, depending of the type of matching method)

const minMax = matched.minMaxLoc();

const { maxLoc: { x, y } } = minMax;

// Draw bounding rectangle

originalMat.drawRectangle(

new cv.Rect(x, y, waldoMat.cols, waldoMat.rows),

new cv.Vec(0, 255, 0),

2,

cv.LINE_8

);

// Open result in new window

cv.imshow('We\'ve found Waldo!', originalMat);

cv.waitKey();

};

// noinspection JSIgnoredPromiseFromCall

findWaldo();