In this paper, a lossless to lossy transformbased image compression of hyperspectral images based on Integer Karhunen-Loeve transform (IKLT) and Integer Discrete Wavelet transform (IDWT) is proposed. Integer transfor...
详细信息
ISBN:
(纸本)9780819495341
In this paper, a lossless to lossy transformbased image compression of hyperspectral images based on Integer Karhunen-Loeve transform (IKLT) and Integer Discrete Wavelet transform (IDWT) is proposed. Integer transforms are used to accomplish reversibility. The IKLT is used as a spectral decorrelator and the 2D-IDWT is used as a spatial decorrelator. The three-dimensional Binary Embedded Zerotree Wavelet (3D-BEZW) algorithm efficiently encodes hyperspectral volumetric image by implementing progressive bitplane coding. The signs and magnitudes of transform coefficients are encoded separately. Lossy and lossless compressions of signs are implemented by conventional EZW algorithm and arithmetic coding respectively. The efficient 3D-BEZW algorithm is applied to code magnitudes. Further compression can be achieved using arithmetic coding. The lossless and lossy compression performance is compared with other state of the art predictive and transformbased image compression methods on Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) images. Results show that the 3D-BEZW performance is comparable to predictive algorithms However, its computational cost is comparable to transform- based algorithms
暂无评论