A 3D vector field is a complex source of information. It is also interesting to compute some differential operators on the field to obtain 3D greyscale images. The main idea is to be able to interpret and understand the vector field and thus the time displacement.

• Norm
• Divergence (Calmon et al.)
• Norm * divergence (Calmon et al.)
• "discrete dV/V" (Prima et al.)
• Jacobian (Rey et al.)
• Shear quantity (Rey et al.)
• Deformation energy (Rey et al.)

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