The present application provides a liner for a combustor. In this invention, both application data and image data which is created from the application data and formed from pages are registered in a database in accordance with database registration information. Frames that may be skipped have their frame scores reduced. The step comprises the steps of: calculating a correlation matrix; decomposing the correlation matrix; calculating a filter matrix; and calculating an approximation of the filtered digital data. The production process can be a Bayer process.