jQuery image positioning after css rotation

image_rotate.jquery.js

      var $img = $('.imagerotate img');

      $img.on('load', function(){


        var item_width = $(".pingster-gallery-item-image").width();
        var image_width = $(".imagerotate img").width();
        var image_height = $(".imagerotate img").height();
        var scale = image_width / image_height;
        var image_rotated_height = item_width * scale;
        var correct_position = (image_width - image_height) * scale + 1;
        $(".imagerotate img").height(item_width);
        $(".imagerotate").width(image_rotated_height);
        $(".imagerotate img").width(image_rotated_height);
        $(".imagerotate").height(image_rotated_height);
        $(".imagerotate img").css('position','relative').css('bottom', -Math.abs(correct_position));

        console.log('frame width: ' + item_width);
        console.log('image width: ' + image_width);
        console.log('image height: ' + image_height);
        console.log('scale: ' + scale);
        console.log('image height after rotation: ' + image_rotated_height);
        console.log('correct position: ' + correct_position);
        console.log('memory usage:' + memorySizeOf(window.performance.memory));
      });


    // FUNCTIONS ON RESIZE
    jQuery( window ).resize(function() {
        rotate_images();
    });


    // ROTATE IMAGES ON HOME PAGE
    function rotate_images() {
    var iw = jQuery('.pingster-gallery-item').width();
    var ih = jQuery('.pingster-gallery-item').height();
    jQuery(".pingster-gallery-item-image img.portrait").css({'transform': 'rotate(+90deg)','height' : iw});
    }
    rotate_images();