Setting JPEG image quality to 0.90 instead of 0.98 to reduce image sizes; files too large might lead to BLOOMIN8 picture frame hiccups. Lower image quality should not be visible on the frame.

Author: fwmone

package.json

@@ -1,6 +1,6 @@
 {
   "name": "eink-optimize",
-  "version": "0.1.2",
+  "version": "0.1.3",
   "description": "Optimization for Spectra6 eInk picture frames",
   "dependencies": {
     "canvas": "^3.2.0",

server.js

@@ -179,9 +179,13 @@ app.post("/optimize", upload.single("image"), async (req, res) => {
       // Convert the colors to the display's native colors
       replaceColors(ditheredCanvas, ditheredCanvasWithDeviceColors, palette);
 
-      buf = ditheredCanvasWithDeviceColors.toBuffer("image/" + format, { quality: 0.92 });
+      buf = ditheredCanvasWithDeviceColors.toBuffer("image/" + format, { quality: 0.90 });
     } else {
-      buf = inputCanvas.toBuffer("image/" + format, { quality: 0.98 });
+      buf = inputCanvas.toBuffer("image/" + format, {
+											      	quality: 0.90,
+											    	progressive: false,
+											    	chromaSubsampling: true
+											    	});
     }
 
     res.setHeader("Content-Type", "image/" + format);