radiometric_normalization 介绍
radiometric_normalization 是一个图形转换工具（normalizing a candidate image to time-
invariant features in a set of reference images covering a time series）。
具有以下功能：
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generating a time-invariant reference image from a time stack
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identifying features
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calculating a linear
reference_image = time_stack.generate(
reference_paths, method=’identity’)pif_weight, reference_img, candidate_img = pif.generate(
candidate_path, reference_path=reference_image, method=’identity’)transformations = transformation.generate(
pif_weight, reference_img, candidate_img, method=’linear_relationship’)