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Add experimental sharpness calc to stats #2251

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Lovell Fuller
2020-06-12 11:25:57 +01:00
parent 9431029917
commit 8f5495a446
6 changed files with 49 additions and 2 deletions
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23
test/unit/stats.js
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@@ -25,6 +25,7 @@ describe('Image Stats', function () {
assert.strictEqual(true, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 7.319914765248541));
assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 0.7883011147075762));
// red channel
assert.strictEqual(0, stats.channels[0].min);
@@ -84,6 +85,7 @@ describe('Image Stats', function () {
assert.strictEqual(true, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 0.3409031108021736));
assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 9.111356137722868));
// red channel
assert.strictEqual(0, stats.channels[0].min);
@@ -110,6 +112,7 @@ describe('Image Stats', function () {
assert.strictEqual(false, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 0.06778064835816622));
assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 2.522916068931278));
// red channel
assert.strictEqual(0, stats.channels[0].min);
@@ -185,6 +188,7 @@ describe('Image Stats', function () {
assert.strictEqual(false, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 0));
assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 0));
// alpha channel
assert.strictEqual(0, stats.channels[3].min);
@@ -212,6 +216,7 @@ describe('Image Stats', function () {
assert.strictEqual(true, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 0.3851250782608986));
assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 10.312521863719589));
// red channel
assert.strictEqual(0, stats.channels[0].min);
@@ -239,6 +244,7 @@ describe('Image Stats', function () {
assert.strictEqual(true, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 7.51758075132966));
assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 9.959951636662941));
// red channel
assert.strictEqual(0, stats.channels[0].min);
@@ -298,6 +304,7 @@ describe('Image Stats', function () {
assert.strictEqual(true, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 6.087309412541799));
assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 2.9250574456255682));
// red channel
assert.strictEqual(35, stats.channels[0].min);
@@ -357,6 +364,7 @@ describe('Image Stats', function () {
assert.strictEqual(false, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 1));
assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 15.870619016486861));
// gray channel
assert.strictEqual(0, stats.channels[0].min);
@@ -410,6 +418,7 @@ describe('Image Stats', function () {
assert.strictEqual(true, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 7.319914765248541));
assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 0.788301114707569));
// red channel
assert.strictEqual(0, stats.channels[0].min);
@@ -472,6 +481,7 @@ describe('Image Stats', function () {
return pipeline.stats().then(function (stats) {
assert.strictEqual(true, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 7.319914765248541));
assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 0.788301114707569));
// red channel
assert.strictEqual(0, stats.channels[0].min);
@@ -529,6 +539,7 @@ describe('Image Stats', function () {
return sharp(fixtures.inputJpg).stats().then(function (stats) {
assert.strictEqual(true, stats.isOpaque);
assert.strictEqual(true, isInAcceptableRange(stats.entropy, 7.319914765248541));
assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 0.788301114707569));
// red channel
assert.strictEqual(0, stats.channels[0].min);
@@ -582,6 +593,18 @@ describe('Image Stats', function () {
});
});
it('Blurred image has lower sharpness than original', () => {
const original = sharp(fixtures.inputJpg).stats();
const blurred = sharp(fixtures.inputJpg).blur().toBuffer().then(blur => sharp(blur).stats());
return Promise
.all([original, blurred])
.then(([original, blurred]) => {
assert.strictEqual(true, isInAcceptableRange(original.sharpness, 0.7883011147075476));
assert.strictEqual(true, isInAcceptableRange(blurred.sharpness, 0.4791559805997398));
});
});
it('File input with corrupt header fails gracefully', function (done) {
sharp(fixtures.inputJpgWithCorruptHeader)
.stats(function (err) {