Problem with image quality in Samsung 4 after installation of 5.0.1, what should I do?

[AC Question]

Problem with image quality in Samsung 4 after installation of 5.0.1

I've Samsung S4 and installed Android 5.0.1 recently. immediately after installation, I noticed good performance but seeing significant quality drop of all images. Also the color scheme is changed now. Can't find way to fix these. If anyone knows how to fix, please advice.