ccss3 para agrandar imagen de adentro hacia afuera

/*GROW*/
.grow img {
  height: 300px;
  width: 300px;
 
  -webkit-transition: all 1s ease;
     -moz-transition: all 1s ease;
       -o-transition: all 1s ease;
      -ms-transition: all 1s ease;
          transition: all 1s ease;
}
 
.grow img:hover {
  width: 400px;
  height: 400px;
}

<div class="grow pic">
  <img src="http://lorempixel.com/400/400/people/9" alt="portrait">
</div>