Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/19439#discussion_r150375543 --- Diff: mllib/src/main/scala/org/apache/spark/ml/image/ImageSchema.scala --- @@ -0,0 +1,239 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.spark.ml.image + +import java.awt.Color +import java.awt.color.ColorSpace +import java.io.ByteArrayInputStream +import javax.imageio.ImageIO + +import scala.collection.JavaConverters._ + +import org.apache.spark.annotation.{Experimental, Since} +import org.apache.spark.input.PortableDataStream +import org.apache.spark.sql.{DataFrame, Row, SparkSession} +import org.apache.spark.sql.types._ + +/** + * :: Experimental :: + * Defines the image schema and methods to read and manipulate images. + */ +@Experimental +@Since("2.3.0") +object ImageSchema { + + val undefinedImageType = "Undefined" + + val ocvTypes: Map[String, Int] = Map( --- End diff -- Similarly, ``` (Scala-specific) OpenCV type mapping supported ```
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