1. A method of categorising defects in a media item, the method comprising the steps of: receiving a binarised image of the media item, where the binarised image comprises a two-dimensional array of pixels, each pixel having either a potential defect intensity or a non-defect intensity; identifying one or more blobs comprising contiguous pixels each having a potential defect intensity; for each identified blob, comparing a size of the blob with a damage threshold; ignoring the blob if the blob size is smaller than the damage threshold; for each identified blob having a size exceeding or equaling the damage threshold, categorising the identified blob as one or more of the following categories: tear, missing portion, corner fold, and hole, and wherein when a potential corner fold is present inspecting pixel intensities of a non overlap area against other pixel intensities associated with a potential corner fold region and when the other pixel intensities are not substantially lower than the pixel intensities categorising the blob as a missing corner; and comparing categorised blobs to corresponding unfit values in a defect profile configuration file to ascertain if the media item should be classified as unfit for any purpose.