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Auditing of certificates and bills images is pervasive in ERP systems. However, the scanned or camera-captured images sending to an ERP system are not always of good quality. In order to automate the auditing of certificates and bills, and to alleviate the low recognition rate caused by the low quality image in all kinds of certificates and bills automatic analysis and processing system, this paper proposes a method for detecting and filtering out images with low quality, leaving only high quality images, to improve the recognition rate of the auditing of certificates and bills. Unlike other image quality assessment algorithms, which only deal with the blur or noise, the proposed method comprehensively and practically considers a variety of key factors (clarity, color-bias, noise, abnormal brightness areas etc.) which affect the image quality in the process of certificates and bills assessment. The method is applied to detect …