Github user viirya commented on a diff in the pull request: https://github.com/apache/spark/pull/20168#discussion_r161663481 --- Diff: mllib/src/main/scala/org/apache/spark/ml/image/ImageSchema.scala --- @@ -37,20 +37,67 @@ import org.apache.spark.sql.types._ @Since("2.3.0") object ImageSchema { - val undefinedImageType = "Undefined" + /** + * OpenCv type representation --- End diff -- Add a reference link for OpenCV data type? Like this one: https://docs.opencv.org/2.4/modules/core/doc/basic_structures.html
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