Dimension reduction and rise U-shaped multi-baseline phase unwrapping algorithm

• Main Authors: LI SHIHUAN, LIU JIAJU, ZHANG MING, LI SHIMING, QIN ZHEN, ZHENG KE, LIU HUI, YANG SHIJI, MIAO CHANGWEI, LI GESHUANG
• Format: Patent
• Language: Chinese; English
• Published: 29.09.2023
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; CALCULATING; COMPUTING; COUNTING; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; ELECTRIC DIGITAL DATA PROCESSING; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

The invention discloses a dimension reduction and rise U-shaped multi-baseline phase unwrapping algorithm, and belongs to the technical field of imaging processing. The method comprises the following steps: S1, constructing a discrete optimization model; s2, carrying out dimensionality reduction regularization on the discrete model; s3, carrying out dimension raising regularization on the discrete model, and solving a feasible solution; and S4, calculating an optimal solution. According to the method, a multi-baseline InSAR phase unwrapping problem is converted into a discrete optimization problem, a regularized discrete optimization model is constructed based on the relation between the same relative elevation and each interferometric phase differential, a U-shaped thought of model dimension reduction and dimension rise solution is adopted, dimension rise and dimension reduction of an equation set are controlled by increasing and decreasing constraint conditions, a complex N-dimensional model is firstly redu