How to delete synced photos and folder from iPhone? How to delete synced photos and folder from iPhone, my OS is Windows 7 and I don't want to erase all content from setting.

I have iTunes installed on my PC.

I want to delete images and folder in my iPhone except "Camera Roll"
Connect your device to iTunes, select it in the left navigation bar. 
In the main screen, select the Photos tab. 
Check "Sync Photos" and select only the albums you want to sync. It will remove any pics on your iPhone that are not in the folder(s) selected on your PC