recolo.deflectomerty.grid_method.detect_phase

recolo.deflectomerty.grid_method.detect_phase(img, grid_pitch, window='gaussian', boundary='symm')

Detect the phase modulation along the coordinate axes by convolution with a gaussian window or a triangular window, see [1] for more details.

imgndarray

The image of the grid

grid_pitchfloat

The grid pitch in pixels

windowstr

The type of window used for the convolution. “gaussian” and “triangular” are valid input.

boundarystr

The boundary conditions used at the edges of the image.

ndarray, ndarrayndarray

The phase modulation fields along the image axes

1

The grid method for in-plane displacement and strain measurement: a review and analysis Michel Grediac,

Frédéric Sur, Benoît Blaysat