Auto adjust navbar-brand depending on line-height with bootstrap

navbar.css

.navbar-header {
    min-height: 100%;
    position: absolute;
    top: 0;
    bottom: 0;
}

.navbar-brand>img {
    max-width:100%;
    max-height:100%;
}

.navbar-brand {
    padding-top: 0;
    padding-bottom: 0;
    display: table-cell;
    vertical-align: middle;
    height: 100%;
}