试验结果表明：在保持相近率失真性能的同时，该算法可以有效地降低编码的计算复杂度。

Experi - mental results show that this method can efficiently reduces the computational complexity while keeping similar RD performance.

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其次，提出了基于PFGS的两点率失真优化的联合基本层和增强层模式选择算法。

Secondly, a two-point rate-distortion optimized joint base layer and enhancement layer mode decision algorithm is proposed for PFGS.

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实验证明，基于3维小波变换的3维SPIHT编码算法在对超光谱图像压缩时，表现出了优良的率失真性能。 并且算法复杂度适中，具有嵌入式特性。

The test results show that the 3D SPIHT algorithm based on 3D DWT for hyperspectral images compression is very efficient, the algorithm is embedded and has modest complexity.

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