def undistort_image(image, look_up_table):
"""
Function to undistort an image using a look-up table
:param image:
:param look_up_table:
:return:
"""
################################################################################
# Copyright (c) 2019 University of Maryland
# Authors:
# Kanishka Ganguly ([email protected])
#
# This work is licensed under the Creative Commons
# Attribution-NonCommercial-ShareAlike 4.0 International License.
# To view a copy of this license, visit
# http://creativecommons.org/licenses/by-nc-sa/4.0/ or send a letter to
# Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.
#
################################################################################
reshaped_lut = look_up_table[:, 1::-1].T.reshape(
(2, image.shape[0], image.shape[1]))
undistorted = np.rollaxis(
np.array([
interp2(image[:, :, channel], reshaped_lut, order=1)
for channel in range(0, image.shape[2])
]), 0, 3)
return undistorted.astype(image.dtype)
def UndistortImage(image, LUT):
reshaped_lut = LUT[:, 1::-1].T.reshape((2, image.shape[0], image.shape[1]))
undistorted = np.rollaxis(
np.array([
interp2(image[:, :, channel], reshaped_lut, order=1)
for channel in range(0, image.shape[2])
]), 0, 3)
return undistorted.astype(image.dtype)
def undistort_image(image: np.array, lut: np.array) -> np.array:
"""
Takes an distorted image and undistort it.
Args:
lut: np.array
Undistortion lookup table
image: np.array
input color image of shape (m, n, 3)
Returns: np.array
"""
log.debug(f' DataPreprocessor.undistort_image() invoked..!')
reshaped_lut = lut[:, 1::-1].T.reshape(
(2, image.shape[0], image.shape[1]))
undistorted = np.rollaxis(
np.array([
interp2(image[:, :, channel], reshaped_lut, order=1)
for channel in range(0, image.shape[2])
]), 0, 3)
log.debug(f' Exiting undistort_image()..!')
return undistorted.astype(image.dtype)