def get_intersection_area(box1, box2):
    """
    compute intersection area of box1 and box2 (both are 4 dim box coordinates in [x1, y1, x2, y2] format)
    """
    xmin1, ymin1, xmax1, ymax1 = box1
    xmin2, ymin2, xmax2, ymax2 = box2
    
    x_overlap = max(0, min(xmax1, xmax2) - max(xmin1, xmin2))
    y_overlap = max(0, min(ymax1, ymax2) - max(ymin1, ymin2))
    overlap_area = x_overlap * y_overlap
    
    return overlap_area