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Add experimental entropy field to stats response

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Lovell Fuller
2018-08-06 15:41:27 +01:00
parent 532de4ecab
commit 25bd2cea3e
5 changed files with 32 additions and 9 deletions
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15
test/unit/stats.js
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@@ -24,6 +24,7 @@ describe('Image Stats', function () {
if (err) throw err;
assert.strictEqual(true, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 7.319914765248541));
// red channel
assert.strictEqual(0, stats.channels[0]['min']);
@@ -82,6 +83,7 @@ describe('Image Stats', function () {
if (err) throw err;
assert.strictEqual(true, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 0.3409031108021736));
// red channel
assert.strictEqual(0, stats.channels[0]['min']);
@@ -105,7 +107,9 @@ describe('Image Stats', function () {
it('PNG with transparency', function (done) {
sharp(fixtures.inputPngWithTransparency).stats(function (err, stats) {
if (err) throw err;
assert.strictEqual(false, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 0.06778064835816622));
// red channel
assert.strictEqual(0, stats.channels[0]['min']);
@@ -180,6 +184,7 @@ describe('Image Stats', function () {
if (err) throw err;
assert.strictEqual(false, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 0));
// alpha channel
assert.strictEqual(0, stats.channels[3]['min']);
@@ -204,7 +209,9 @@ describe('Image Stats', function () {
it('Tiff', function (done) {
sharp(fixtures.inputTiff).stats(function (err, stats) {
if (err) throw err;
assert.strictEqual(true, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 0.3851250782608986));
// red channel
assert.strictEqual(0, stats.channels[0]['min']);
@@ -231,6 +238,7 @@ describe('Image Stats', function () {
if (err) throw err;
assert.strictEqual(true, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 7.51758075132966));
// red channel
assert.strictEqual(0, stats.channels[0]['min']);
@@ -289,6 +297,7 @@ describe('Image Stats', function () {
if (err) throw err;
assert.strictEqual(true, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 6.087309412541799));
// red channel
assert.strictEqual(35, stats.channels[0]['min']);
@@ -345,7 +354,9 @@ describe('Image Stats', function () {
it('Grayscale GIF with alpha', function (done) {
sharp(fixtures.inputGifGreyPlusAlpha).stats(function (err, stats) {
if (err) throw err;
assert.strictEqual(false, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 1));
// gray channel
assert.strictEqual(0, stats.channels[0]['min']);
@@ -387,7 +398,9 @@ describe('Image Stats', function () {
const readable = fs.createReadStream(fixtures.inputJpg);
const pipeline = sharp().stats(function (err, stats) {
if (err) throw err;
assert.strictEqual(true, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 7.319914765248541));
// red channel
assert.strictEqual(0, stats.channels[0]['min']);
@@ -449,6 +462,7 @@ describe('Image Stats', function () {
return pipeline.stats().then(function (stats) {
assert.strictEqual(true, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 7.319914765248541));
// red channel
assert.strictEqual(0, stats.channels[0]['min']);
@@ -505,6 +519,7 @@ describe('Image Stats', function () {
it('File in, Promise out', function () {
return sharp(fixtures.inputJpg).stats().then(function (stats) {
assert.strictEqual(true, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 7.319914765248541));
// red channel
assert.strictEqual(0, stats.channels[0]['min']);