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Update image_handling.py #66

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22 changes: 13 additions & 9 deletions diffractsim/util/image_handling.py
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Original file line number Diff line number Diff line change
Expand Up @@ -55,16 +55,20 @@ def convert_graymap_image_to_hsvmap_image(img):



def resize_array(img_array, new_shape):
from scipy.interpolate import RegularGridInterpolator

def resize_array(img_array, new_shape):
Ny, Nx = img_array.shape
x = np.linspace(0, 1, Nx)
y = np.linspace(0, 1, Ny)

interpolator = RegularGridInterpolator((y, x), img_array, method="cubic", bounds_error=False, fill_value=0)

new_x = np.linspace(0, 1, new_shape[1])
new_y = np.linspace(0, 1, new_shape[0])
new_grid = np.meshgrid(new_y, new_x, indexing='ij')

resize_img_array = interpolator(np.array([new_grid[0].flatten(), new_grid[1].flatten()]).T).reshape(new_shape)

from scipy.interpolate import interp2d
fun = interp2d(
np.linspace(0, 1, Nx),
np.linspace(0, 1, Ny),
img_array,
kind="cubic",
)
resize_img_array = fun(np.linspace(0, 1, new_shape[1]), np.linspace(0, 1, new_shape[0]))
return resize_img_array