Edit in JSFiddle

<div align="center">
    <div class="img_block">
        <img src="http://placehold.it/250x250" />
            <div class="over_block"></div>
            <span>ВАШ ТЕКСТ ЗДЕСЬ :)</span> 
    </div>
</div>

.img_block {
    max-width:250px;
    height: 250px;
    background:#f6f6f6;
    text-align:center;
    font-family: 'Roboto', sans-serif;
    font-weight:400;
    border-width: 4px; 
    border-style: solid; 
    border-color: #DDDDDD;
    box-shadow: 10px 10px 6px -6px #777777; 
    display:block;
    overflow: hidden;
    position: relative;
    -moz-transition: all .4s;
    -webkit-transition: all .4s;
    -o-transition: all .4s;
    transition: all .4s;
    cursor:pointer;
}
.img_block .over_block {
    background-color:rgba(0, 160, 150, 0);
    width:100%;
    height:100%;
    position:absolute;
    top:0;
    left:0;
    z-index: 9900;
    -moz-transition:all 1s;
    -webkit-transition:all 1s;
    -o-transition:all 1s;
    transition:all 1s;
}
.img_block:hover .over_block {
    display:block;
    background-color:rgba(0, 160, 150, 0.7);
}
.img_block span {
    background: rgba(0, 92, 44, 0.5);
    width:100%;
    height:0px;
    text-transform:uppercase;
    font-size:11px;
    line-height:60px;
    position:absolute;
    display:block;
    overflow: hidden;
    bottom:0px;
    left:0;
    z-index: 9910;
    -moz-transition: all .4s;
    -webkit-transition: all .4s;
    -o-transition: all .4s;
    transition: all .4s;
}
.img_block:hover span {
    bottom:0;
    height:60px;
    color: #ffffff;
}