Hello
Go to your project directory and open resource:
http://prntscr.com/q5egwx and then replace the splash and icon image with the existing images with your image
http://prntscr.com/q5eh4g and then open your project directory on command prompt and run with this command ionic Cordova resources
http://prntscr.com/q5ehh0 . see this it will generate the image for your app
http://prntscr.com/q5ehvc