diff --git a/src/core/jpg.js b/src/core/jpg.js
index 5f973ba6e..9f36a1398 100644
--- a/src/core/jpg.js
+++ b/src/core/jpg.js
@@ -1283,67 +1283,68 @@ var JpegImage = (function JpegImageClosure() {
     _convertCmykToRgb: function convertCmykToRgb(data) {
       var c, m, y, k;
       var offset = 0;
-      var scale = 1 / 255;
       for (var i = 0, length = data.length; i < length; i += 4) {
-        c = data[i] * scale;
-        m = data[i + 1] * scale;
-        y = data[i + 2] * scale;
-        k = data[i + 3] * scale;
+        c = data[i];
+        m = data[i + 1];
+        y = data[i + 2];
+        k = data[i + 3];
 
         data[offset++] =
           255 +
           c *
-            (-4.387332384609988 * c +
-              54.48615194189176 * m +
-              18.82290502165302 * y +
-              212.25662451639585 * k -
-              285.2331026137004) +
+            (-0.00006747147073602441 * c +
+              0.0008379262121013727 * m +
+              0.0002894718188643294 * y +
+              0.003264231057537806 * k -
+              1.1185611867203937) +
           m *
-            (1.7149763477362134 * m -
-              5.6096736904047315 * y -
-              17.873870861415444 * k -
-              5.497006427196366) +
+            (0.000026374107616089405 * m -
+              0.00008626949158638572 * y -
+              0.0002748769067499491 * k -
+              0.02155688794978967) +
           y *
-            (-2.5217340131683033 * y -
-              21.248923337353073 * k +
-              17.5119270841813) -
-          k * (21.86122147463605 * k + 189.48180835922747);
+            (-0.00003878099212869363 * y -
+              0.0003267808279485286 * k +
+              0.0686742238595345) -
+          k * (0.0003361971776183937 * k + 0.7430659151342254);
 
         data[offset++] =
           255 +
           c *
-            (8.841041422036149 * c +
-              60.118027045597366 * m +
-              6.871425592049007 * y +
-              31.159100130055922 * k -
-              79.2970844816548) +
+            (0.00013596372813588848 * c +
+              0.000924537132573585 * m +
+              0.00010567359618683593 * y +
+              0.0004791864687436512 * k -
+              0.3109689587515875) +
           m *
-            (-15.310361306967817 * m +
-              17.575251261109482 * y +
-              131.35250912493976 * k -
-              190.9453302588951) +
+            (-0.00023545346108370344 * m +
+              0.0002702845253534714 * y +
+              0.0020200308977307156 * k -
+              0.7488052167015494) +
           y *
-            (4.444339102852739 * y + 9.8632861493405 * k - 24.86741582555878) -
-          k * (20.737325471181034 * k + 187.80453709719578);
+            (0.00006834815998235662 * y +
+              0.00015168452363460973 * k -
+              0.09751927774728933) -
+          k * (0.00031891311758832814 * k + 0.7364883807733168);
 
         data[offset++] =
           255 +
           c *
-            (0.8842522430003296 * c +
-              8.078677503112928 * m +
-              30.89978309703729 * y -
-              0.23883238689178934 * k -
-              14.183576799673286) +
+            (0.000013598650411385307 * c +
+              0.00012423956175490851 * m +
+              0.0004751985097583589 * y -
+              0.0000036729317476630422 * k -
+              0.05562186980264034) +
           m *
-            (10.49593273432072 * m +
-              63.02378494754052 * y +
-              50.606957656360734 * k -
-              112.23884253719248) +
+            (0.00016141380598724676 * m +
+              0.0009692239130725186 * y +
+              0.0007782692450036253 * k -
+              0.44015232367526463) +
           y *
-            (0.03296041114873217 * y +
-              115.60384449646641 * k -
-              193.58209356861505) -
-          k * (22.33816807309886 * k + 180.12613974708367);
+            (5.068882914068769e-7 * y +
+              0.0017778369011375071 * k -
+              0.7591454649749609) -
+          k * (0.0003435319965105553 * k + 0.7063770186160144);
       }
       // Ensure that only the converted RGB data is returned.
       return data.subarray(0, offset);