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Geometric moire is a classical optical experimental technique used for full-field, non-contact measurement of displacements and strains. Geometric moire has been overshadowed by finite element method over the past three decades. However, new developments and applications, such as low-cost dynamic double exposure moire, moire applications in stereolitography, etc., have revived the use of experimental geometric moire. A number of new significant questions appear when time-average geometric moire techniques are being applied for scientific and engineering problems. Digital image processing,...