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Expose libvips' median filter operation (#1161)

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This commit is contained in:
Andrea Bianco
2018-03-17 11:52:44 +01:00
committed by Lovell Fuller
parent f880adbaac
commit 875937e3d8
12 changed files with 105 additions and 1 deletions
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72
test/unit/median.js Normal file
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'use strict';
const assert = require('assert');
const sharp = require('../../');
const fixtures = require('../fixtures');
describe('Median filter', function () {
it('1x1 window', function (done) {
sharp(fixtures.inputJpgThRandom)
.median(1)
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual('jpeg', info.format);
assert.strictEqual(200, info.width);
assert.strictEqual(200, info.height);
fixtures.assertSimilar(fixtures.expected('median_1.jpg'), data, done);
});
});
it('3x3 window', function (done) {
sharp(fixtures.inputJpgThRandom)
.median(3)
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual('jpeg', info.format);
assert.strictEqual(200, info.width);
assert.strictEqual(200, info.height);
fixtures.assertSimilar(fixtures.expected('median_3.jpg'), data, done);
});
});
it('5x5 window', function (done) {
sharp(fixtures.inputJpgThRandom)
.median(5)
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual('jpeg', info.format);
assert.strictEqual(200, info.width);
assert.strictEqual(200, info.height);
fixtures.assertSimilar(fixtures.expected('median_5.jpg'), data, done);
});
});
it('color image', function (done) {
sharp(fixtures.inputJpgRandom)
.median(5)
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual('jpeg', info.format);
assert.strictEqual(200, info.width);
assert.strictEqual(200, info.height);
fixtures.assertSimilar(fixtures.expected('median_color.jpg'), data, done);
});
});
it('no windows size', function (done) {
sharp(fixtures.inputJpgThRandom)
.median()
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual('jpeg', info.format);
assert.strictEqual(200, info.width);
assert.strictEqual(200, info.height);
fixtures.assertSimilar(fixtures.expected('median_3.jpg'), data, done);
});
});
it('invalid radius', function () {
assert.throws(function () {
sharp(fixtures.inputJpg).median(0.1);
});
});
});