.carousel-item {
    height: 70vh;
}
.carousel-item > img {
    position: absolute;
    left: 50%;
    top: 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-height: none !important;
    max-width: none !important;
    min-height: 100%;
    min-width: 100%;

}