Systems and methods of generating and using auxiliary information (38) for reconstructing digital images (34) that have processed through print-scan channels (18) are described. Auxiliary information (38), including values of reference pixels, is extracted from an input image (34). Output image data (36) containing a representation of the input image (34) is generated. The auxiliary information (38) is stored in association with the output image data (36). The auxiliary data structure (40) is decoded to produce decoded auxiliary information (48). Scanned image data (44) that is obtained from a hard copy (42) of the output image data (36) is registered and color-corrected based on the decoded auxiliary information (48) to obtain an output image (46) corresponding to a high-quality reconstruction of the input image (34). The auxiliary information (48) may include coded transform coefficient data from which the input image (34) may be reconstructed using the registered and color-corrected output image (46) as side information.
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