Segmentation based linear predictive coding of multispectral images
This paper presents a segmentation based linear predictive coding (SLPC) method for multispectral images. Given a set of multispectral images, the SLPC method first segments it into statistically distinct regions. It then finds a suitable linear prediction model for each region. Finally, it quantizes the prediction error in each class using a vector quantizer. The original image set is described by the segmentation map, the model parameters for each class, and the quantized prediction errors. The SLPC method can produce very high compression gains, because the specification of the segmentation map and model parameters requires significantly fewer bits than that for the original intensity values. This method has been applied to magnetic resonance head images with three spectral bands (one T1 weighted and two T2 weighted, 256/spl times/256/spl times/12 bits/image). Images compressed by a factor of more than 22 have been regarded as indistinguishable from the originals, by several radiologists.<<ETX>>