def get_optimal_resolution(bbox):
"""
Determines the optimal resolution of the image:
* best resolution that still produces an image smaller than 5000x5000 pixels
"""
x_pxs, y_pxs = bbox_to_resolution(bbox, width=1, height=1)
resx = (int((x_pxs - 1) / 50000) + 1) * 10
resy = (int((y_pxs - 1) / 50000) + 1) * 10
return resx, resy
def _scale_factors(self, reference_shape, bbox):
"""Compute the resampling factors for height and width of the input array and sigma
:param reference_shape: Tuple specifying height and width in pixels of high-resolution array
:type reference_shape: (int, int)
:param bbox: An EOPatch bounding box
:type bbox: sentinelhub.BBox
:return: Rescale factor for rows and columns
:rtype: ((float, float), float)
"""
res_x, res_y = bbox_to_resolution(bbox,
width=reference_shape[1],
height=reference_shape[0])
if self.proc_resolution is None:
pres_x, pres_y = res_x, res_y
else:
pres_x, pres_y = self.proc_resolution
rescale = res_y / pres_y, res_x / pres_x
sigma = 200 / (pres_x + pres_y)
return rescale, sigma