Update index.js

index.js

@@ -494,7 +494,7 @@ async function upscaleImage(imageBuffer) {
   return new Promise(async (resolve, reject) => {
       try {
         const upscaler = new Upscaler();
-        const imageTensor = tf.tensor3d(imageBuffer, [imageBuffer.height, imageBuffer.width, 3]);
+        const imageTensor = tfjs.tensor3d(imageBuffer, [imageBuffer.height, imageBuffer.width, 3]);
 
         const upscaledTensor = await upscaler.upscale(imageTensor, {
           scale: 4, // upscale by a factor of 4
@@ -504,7 +504,7 @@ async function upscaleImage(imageBuffer) {
           colorEnhance: true, // enhance colors
         });
 
-        const upscaledImageBuffer = await tf.tensor3dToBuffer(upscaledTensor);
+        const upscaledImageBuffer = await tfjs.tensor3dToBuffer(upscaledTensor);
 
         // dispose the tensors!
         imageTensor.dispose();