Title :
Preprocessing method for DCT-based image-compression
Author :
Oizumi, Munenori
Author_Institution :
Tsukuba Technol. Center, Texas Instrum., Tsukuba
Abstract :
This paper describes a preprocessing method for DCT-based image compression, which is independent of the compression process. The method predicts the likelihood that visible distortion appears at each location, and applies filtering accordingly. For prediction, an auto-correlation function is utilized as an index to estimate the distribution of the power spectrum. This process improves the image quality of the resulting compressed image by reducing the ringing distortions
Keywords :
data compression; discrete cosine transforms; filtering theory; image coding; transform coding; DCT; auto-correlation function; filtering; image quality; image-compression; preprocessing method; visible distortion; Autocorrelation; Decoding; Discrete cosine transforms; Filtering; Image coding; Image quality; Noise reduction; Noise shaping; Shape; Transform coding;
Journal_Title :
Consumer Electronics, IEEE Transactions on
DOI :
10.1109/TCE.2006.1706502
