How can Apple reduce image size so much and contain its quality?
For example: http://images.apple.com/v/ipad/home/y/images/home/accessories_xlarge.jpg
This is a 2560x800px big image in just 218kb, and the image quality is good!
I've try some tools like https://tinypng.com/, it can do huge optimization, but it will reduce images quality.
So I still can't figure out what tool Apple uses, please help me out~~~
Thank you very much! (And please forgive my poor english > <)