求翻译：由早期的加权平均法，IHS(亮度、色度、饱和度)模型法，PCA（主分量分析）法[2]、高通滤波法到中期的塔式融合，包括拉普拉斯金字塔[3]、梯度金字塔[4]、形态学金字塔等。是什么意思？

By the weighted average method for the early IHS (brightness, chroma, saturation) model method, PCA (Principal Component Analysis) method [2], high-pass filter to the mid-tower fusion, including the Laplacian pyramid [3 gradient pyramid [4], morphological pyramid.

Since the early days, the weighted average method IHS (brightness, hue, and saturation) Model Law, PCA (the main component analysis) method [ 2], high-pass filter to the mid-tower, including the financial pyramid, [ 3] , [ 4] gradient pyramids, morphological pyramid, and so on.

From the early weighted mean method, IHS (brightness, chromaticity, degree of saturation) the modeling, PCA (host component analysis) law (2), passes the filtering high to the intermediate stage tower system fusion, including Laplace pyramid (3), gradient pyramid (4), morphology pyramid and so on.

From the early days of weighted average method, IHS (brightness, hue, saturation) model law, PCA (principal component analysis) Act [2], high-pass filtering to a tower in the middle of integration, including Laplacian pyramids [3], gradient pyramid [4], morphology pyramid, and so on.

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