Smoothing with Camera Raw
1. Open Image in Camera Raw
PC: Use the Open As Command in Photoshop, select the image, and select camera raw as the format.
Mac: Use the Open Command in Photoshop, select the image, and select camera raw as the format.
2. Hold Shift Key down, Open Image will change to Open Object, click on this button and the image will be opened as a Smart Object in Photoshop.
3. Duplicate the layer by right-clicking on the Layer (but Not the layer thumbnail) and select new smart object via copy.