Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/22349#discussion_r215593840
--- Diff: python/pyspark/ml/image.py ---
@@ -20,6 +20,9 @@
An attribute of this module that contains the instance of
:class:`_ImageSchema`.
+.. note:: Deprecated in 2.4.0. Use `spark.read.format("image").load(path)`
instead and
--- End diff --
FYI, that datasource wouldn't be able to replace `toNDArray` and `toImage`
which require numpy. Might be better leave a note that it needs manual
conversion with NumPy API for both.
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