def _cutout_psf(self, image, subgrid_res):
        """
        cutout the part of the image relevant for the psf convolution
        :param image:
        :return:
        """
        self._init_mask_psf()
        return image[self._x_min_psf*subgrid_res:(self._x_max_psf+1)*subgrid_res, self._y_min_psf*subgrid_res:(self._y_max_psf+1)*subgrid_res]
cutout the part of the image relevant for the psf convolution
        :param image:
        :return: