SemanSemantic-UItic-UI/source/library/shaded/elements/image.css

.ui.feature.image {
  position: relative;
  display: inline-block;
  border: 1px solid #CCCCCC;
  background: #F5F5F5 url(../images/placeholder-subtle.png) no-repeat center center;
}
.ui.feature.image img {
  display: block;
}
.ui.feature.image:after {
  position: absolute;
  top: 0px;
  left: 0px;
  width: 100%;
  height: 100%;
  content: '';
  -webkit-box-shadow: 
    0px 0px 0px 3px rgba(255, 255, 255, 0.6) inset,
    0px 1px 1px rgba(0, 0, 0, 0.3)
  ;
  -moz-box-shadow: 
    0px 0px 0px 3px rgba(255, 255, 255, 0.6) inset,
    0px 1px 1px rgba(0, 0, 0, 0.3)
  ;
  box-shadow: 
    0px 0px 0px 3px rgba(255, 255, 255, 0.6) inset,
    0px 1px 1px rgba(0, 0, 0, 0.3)
  ;
  z-index: 10;
}

/* Rounded Corners */
.ui.feature.image,
.ui.feature.image img,
.ui.feature.image:after {
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  border-radius: 5px;
}