centering image crop

.assesePhotoList ul{display: -webkit-box;display: -moz-box;display: -ms-flexbox;display: -webkit-flex;display: flex;-webkit-flex-flow: row;justify-content: space-around;padding:9px 16px 0;}
.assesePhotoList ul li{overflow:hidden;margin:0 4px;color: white;font-weight: bold;font-size: 1.5em;text-align: center;flex: 1 0 auto;height:auto;}
.assesePhotoList ul li:before {content:'';float:left;padding-top:100%;}
.assesePhotoList ul li .photoWrap{position:relative;width:100%;height:100%;background:#f9f9f9 url('http://image.gsshop.com/ui/gsshop/shop/images/noimg_list.png') no-repeat 50% 50%;background-size:55px auto;}
.assesePhotoList ul li .img-thumb{overflow:hidden;width:100%;height:auto;}
.assesePhotoList ul li .img-thumb img{position: absolute;left: 50%;top: 50%;height: 100%;width: auto;-webkit-transform: translate(-50%,-50%);-ms-transform: translate(-50%,-50%);transform: translate(-50%,-50%);-webkit-user-select:none;pointer-events:none;box-sizing:border-box;}

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