1/19/2023 0 Comments J2k compressionA simple rule of thumb is that if the peak-signal-to-noise ratio (PSNR) or human visual system (HVS) inspired metric is above 40 dBs, then the decompressed image is considered as “near perceptually lossless”. Instead, it will be more practical to apply perceptually lossless compression. Due to the presence of hundreds of bands in HSI, however, heavy burden in data storage and transmission bandwidth has been introduced.įor many practical applications, it is unnecessary to compress data losslessly because lossless compression can achieve only two to three times of compression. Hyperspectral images (HSI) have found a wide range of applications, including remote chemical monitoring, target detection, anomaly and change detection, etc. In some cases, the PCA + X264Ĭombination achieved more than 3 dBs than the PCA + J2K combination. Performance and computational complexity. Of PCA and X264 yielded the best performance in terms of compression Moreover, some alternative techniques such as video, split band, and Three representative HSI data cubes were used in our studies.įour video/image codecs, including J2K, X264, X265, and Daala, haveīeen investigated and four performance metrics were used in our comparative The key idea is to compare several combinations of PCA and video/ Peak-signal-to-noise ratio (PSNR) or human visual system (HVS) based metrics. Perceptually lossless means that theĭecompressed HSI data cube has a performance metric near 40 dBs in terms of Perceptually lossless compression of HSI. In this paper, we present some new results in HSI compression. However, since there are several new compression codecsĭeveloped after J2K in the past 15 years, it is worthwhile to revisit this researchĪrea and investigate if there are better techniques for HSI compression. Technique is the combination of principal component analysis (PCA)Īnd JPEG-2000 (J2K). Techniques have been explored for HSI in the past decades. Hyperspectral images (HSI) have hundreds of bands, which impose heavyīurden on data storage and transmission bandwidth.
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