Fast robust curvelet domain multiple subtraction technology based on frequency division constraint

The invention discloses a fast robust curvelet domain multiple subtraction technology based on frequency division constraint. The technology comprises the following steps: step 1, dividing frequency bands of a multiple model based on an energy proportion; and step 2, a weighted L1 norm shrinkage threshold algorithm of frequency division curvelet domain constraints. Curvelet domain iteration is utilized, multiple curvelet transformation is avoided, and the traditional curvelet domain multiple subtraction technology is accelerated; frequency division constraint is introduced, non-adaptive frequency decomposition of traditional curvelet transform is improved, the separation effect of primary waves and multiple waves in a curvelet domain is improved, and subtraction of the multiple waves in the curvelet domain is more robust. 本发明公开了一种基于分频约束的快速鲁棒曲波域多次波相减技术，所述技术包括以下步骤：步骤1：多次波模型基于能量占比的频带划分；步骤2：分频曲波域约束的加权L1范数收缩阈值算法。本发明利用曲波域迭代，避免多次曲波变换，加速传统曲波域多次波相减技术；引入分频约束，改进传统曲波变换非自适应频率分解，提升一次波和多次波在曲波域的分离效果，使曲波域多次波相减更加鲁棒。