Quantification of motion quality effect on image quality

摘要

An image quality analysis system is provided that allows highly accurate measurements of motion quality defects. The motion quality analysis process relies only on relative measurements, which can be performed sufficiently accurately with standard input scanners. The technique can therefore be incorporated in the image path of a copier or multi-function printer being tested to allow on-the-fly motion quality correction without the need for expensive, high precision measuring equipment. The system includes one or more digital test patterns provided in hardcopy form for providing one or more hardcopy test images, an input scanner that can scan the hard copy test image to form a digital raster image, and an image quality analysis module that receives information about the position of the digital raster image and produces test results relevant to determination of image quality analysis, particularly motion quality defects. The method is accurate and robust using relatively low-resolution CCD-based flat bed scanners, even in spite of their long-range positional errors.