Digital preservation requires a strategy for the storage of large quantities of data, which increases dramatically when dealing with high resolution images. Typically, decision-makers must choose whether to keep terabytes of images in their original TIFF format or compress them. This can be a very difficult decision: to lose visual information though compression could be a waste of the money expended in the creation of the digital assets; however, by choosing to compress, the costs of storage will be reduced. Wavelet compression of JPEG 2000 produces a high quality image: it is an acceptable alternative to TIFF and a good strategy for the storage of large image assets.
Moreover, JPEG 2000 may be considered a format that can guarantee an efficient robustness to bit errors and offers a valid quality with transmission or physical errors: this point of view is confirmed by the case study results that we report in this article, concerning image quality after occurrence of random errors by a comparison among different file formats. Easy tools and freeware software can be used to improve format robustness by duplicating file headers inside or outside the image file format, enhancing the role of JPEG 2000 as a new archival format for high quality images.
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JPEG2000
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