Samsung Galaxy s4 camera quality help?

[Jay]

I'm just trying to figure out something with the camera quality of the samsung galaxy s4. It really bothers me when I try to take a picture of myself or me with my relatives (using the face front camera/camera where the screen is) and it's not that great. It comes off a bit soft and not high-def. But when people use their iPhone 5's and they use the front camera it suddenly looks so much clearer and high-def. It confuses me because the Samsung Galaxy s4 has 2 megapixels for the face fronting camera while the iPhone only has 1.2 megapixels. Do they use certain apps to make it clearer? For example if you look at instagram.com/kendalljenner and check out her "selfies", they LOOK SO CLEAR and much better especially this one http://instagram.com/p/bZyADJDoyP/

Help! If there are apps to use for samsung to edit pictures, feel free to tell me! Thanks
"high definition is a term only used for video" k.. I understand but I know you guys get what I mean when I say the pictures like "high-def" meaning not that blurry/soft but very very clear. And telling me to use a camera instead of my phone... I do not have an actual camera that is why I use my phone...