10. Geometrical transformations of images

10.1. Cropping, resizing and rescaling images

Images being NumPy arrays (as described in the A crash course on NumPy for images section), cropping an image can be done with simple slicing operations. Below we crop a 100x100 square corresponding to the top-left corner of the astronaut image. Note that this operation is done for all color channels (the color dimension is the last, third dimension):

>>> import pysarpro as sarpro
>>> img = sarpro.data.astronaut()
>>> top_left = img[:100, :100]