Then a special Vector Quantization, called Wavelet Tree Vector Quantization (WTVQ), is designed to compress the every spectral image data, and a higher compression performance is obtained.
By the tests, the improved algorithm not only bears the effective compression performance of the original zero tree algorithm, but also improves the visual quality of image.
通过实验，该算法既能保持原有零树算法良好的压缩品质，而且也改善了图像的视觉质量。
3
I find that when tree species is different, dry and wet compression shear strength is different obviously.