spark ImageDataSource 源码
spark ImageDataSource 代码
文件路径：/mllib/src/main/scala/org/apache/spark/ml/source/image/ImageDataSource.scala
/*
* 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.source.image
/**
* `image` package implements Spark SQL data source API for loading image data as `DataFrame`.
* It can load compressed image (jpeg, png, etc.) into raw image representation via `ImageIO`
* in Java library.
* The loaded `DataFrame` has one `StructType` column: `image`, containing image data stored
* as image schema.
* The schema of the `image` column is:
* - origin: `StringType` (represents the file path of the image)
* - height: `IntegerType` (height of the image)
* - width: `IntegerType` (width of the image)
* - nChannels: `IntegerType` (number of image channels)
* - mode: `IntegerType` (OpenCV-compatible type)
* - data: `BinaryType` (Image bytes in OpenCV-compatible order: row-wise BGR in most cases)
*
* To use image data source, you need to set "image" as the format in `DataFrameReader` and
* optionally specify the data source options, for example:
* {{{
* // Scala
* val df = spark.read.format("image")
* .option("dropInvalid", true)
* .load("/path/to/images")
*
* // Java
* Dataset<Row> df = spark.read().format("image")
* .option("dropInvalid", true)
* .load("/path/to/images");
* }}}
*
* Image data source supports the following options:
* - "dropInvalid": Whether to drop the files that are not valid images from the result.
*
* @note This IMAGE data source does not support saving images to files.
*
* @note This class is public for documentation purpose. Please don't use this class directly.
* Rather, use the data source API as illustrated above.
*/
class ImageDataSource private() {}
相关信息
相关文章
0
赞
- 所属分类： 前端技术
- 本文标签：
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
7、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦