Rounded Corners Image in Flutter
Use ClipRRect it will work perfectly.
ClipRRect( borderRadius: BorderRadius.circular(8.0), child: Image.network( subject['images']['large'], height: 150.0, width: 100.0, ),)
You can also use CircleAvatar, which comes with flutter
CircleAvatar( radius: 20, backgroundImage: NetworkImage('https://via.placeholder.com/140x100'))
Using ClipRRect you need to hardcode BorderRadius, so if you need complete circular stuff, use ClipOval instead.
ClipOval( child: Image.network( "image_url", height: 100, width: 100, fit: BoxFit.cover, ),),