<div class='pageframe'>
    <div class='pageimg'>
        <div class='pageinline'></div> <img src='komix19_03_18_10_21_54-12.jpg' alt='Seite 3' style='max-width:100%' />
    </div>
</div>

.pageinline {
    display: block;
    height: 100%;
    position: absolute;
    width: 100%;
}

.pageimg img {
    position: absolute;
    top: 50%;
    left: 50%;
    margin-right: -50%;
    -webkit-transform: translate(-50%, -50%);
    -moz-transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    -o-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    max-width:100%;
    color: #fff;
}