How to use imghash - 5 common examples
To help you get started, we’ve selected a few imghash examples, based on popular ways it is used in public projects.
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spritejs / sprite-core / test / helpers / index.js View on Github 
export async function compare(canvas, caseId) {
const srcData = canvas.toBuffer();
const desCanvas = await createCanvasFromFile(`./test/img/${caseId}.png`);
const desData = desCanvas.toBuffer();
const N = 32;
const hash1 = imghash.hash(srcData, N);
const hash2 = imghash.hash(desData, N);
const results = await Promise.all([hash1, hash2]);
const dist = hamming(...results);
console.warn(colors.cyan(`Hamming distance between canvas and ${caseId} is: ${dist}`));
const diffFile = `./test/img-diff/${caseId}.diff.png`;
const srcFile = `./test/img-diff/${caseId}.src.png`;
const oldFile = `./test/img-diff/${caseId}.old.png`;
const width = canvas.width,
height = canvas.height;
const diffCanvas = createCanvas(width, height),
srcContext = canvas.getContext('2d'),
desContext = desCanvas.getContext('2d'),async function compare(canvas, caseId, pixelCompare = false) {
const srcData = canvas.toBuffer();
const desCanvas = await createCanvasFromFile(`./test/img/${caseId}.png`);
const desData = desCanvas.toBuffer();
const N = 32;
const hash1 = imghash.hash(srcData, N);
const hash2 = imghash.hash(desData, N);
const results = await Promise.all([hash1, hash2]);
const dist = hamming(...results);
console.warn(colors.cyan(`Hamming distance between canvas and ${caseId} is: ${dist}`));
const diffFile = `./test/img-diff/${caseId}.diff.png`;
const srcFile = `./test/img-diff/${caseId}.src.png`;
const width = canvas.width,
height = canvas.height;
const diffCanvas = createCanvas(width, height),
srcContext = canvas.getContext('2d'),
desContext = desCanvas.getContext('2d'),
diffContext = diffCanvas.getContext('2d');export async function compare(canvas, caseId) {
const srcData = canvas.toBuffer();
const desCanvas = await createCanvasFromFile(`./test/img/${caseId}.png`);
const desData = desCanvas.toBuffer();
const N = 32;
const hash1 = imghash.hash(srcData, N);
const hash2 = imghash.hash(desData, N);
const results = await Promise.all([hash1, hash2]);
const dist = hamming(...results);
console.warn(colors.cyan(`Hamming distance between canvas and ${caseId} is: ${dist}`));
const diffFile = `./test/img-diff/${caseId}.diff.png`;
const srcFile = `./test/img-diff/${caseId}.src.png`;
const oldFile = `./test/img-diff/${caseId}.old.png`;
const width = canvas.width,
height = canvas.height;
const diffCanvas = createCanvas(width, height),
srcContext = canvas.getContext('2d'),
desContext = desCanvas.getContext('2d'),
diffContext = diffCanvas.getContext('2d');async function compare(canvas, caseId, pixelCompare = false) {
const srcData = canvas.toBuffer();
const desCanvas = await createCanvasFromFile(`./test/img/${caseId}.png`);
const desData = desCanvas.toBuffer();
const N = 32;
const hash1 = imghash.hash(srcData, N);
const hash2 = imghash.hash(desData, N);
const results = await Promise.all([hash1, hash2]);
const dist = hamming(...results);
console.warn(colors.cyan(`Hamming distance between canvas and ${caseId} is: ${dist}`));
const diffFile = `./test/img-diff/${caseId}.diff.png`;
const srcFile = `./test/img-diff/${caseId}.src.png`;
const width = canvas.width,
height = canvas.height;
const diffCanvas = createCanvas(width, height),
srcContext = canvas.getContext('2d'),
desContext = desCanvas.getContext('2d'),
diffContext = diffCanvas.getContext('2d');imghash
Image perceptual hash calculation for node
