pysdic.Image.evaluate_image_jacobian_du_at_pixel_points#

Image.evaluate_image_jacobian_du_at_pixel_points(pixel_points)[source]#

Evaluate the Jacobian of the image at given pixel points along the \(u\)-axis (rows).

This is a convenience method of the evaluate_image_jacobian_dy_at_pixel_points() method as ‘dy = du’ in pixel coordinates.

See also

evaluate_image_jacobian_dy_at_pixel_points() for evaluating the Jacobian of the image at pixel points along the \(y\)-axis (rows).

Note

The pixel_points will be converted to numpy.float64 type.

Parameters:: pixel_points (ArrayLike) – The pixel points at which to evaluate the Jacobian. The shape should be (\(N_p\), 2) where \(N_p\) is the number of points and each point is represented by its (row, column) coordinates.
Returns:: The evaluated Jacobian values with shape (\(N_p\),) or (\(N_p\), \(C\)) if color image in float64 dtype. If a pixel point is out of bounds, the corresponding value will be set to numpy.nan.
Return type:: numpy.ndarray