com.intel.analytics.bigdl.dataset.image.BytesToBGRImg.scala Maven / Gradle / Ivy
/*
* Copyright 2016 The BigDL Authors.
*
* Licensed 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 com.intel.analytics.bigdl.dataset.image
import java.awt.Color
import java.awt.image.{BufferedImage, DataBufferByte}
import java.nio.ByteBuffer
import com.intel.analytics.bigdl.dataset.{ByteRecord, Transformer}
import scala.collection.Iterator
object BytesToBGRImg {
def apply(normalize: Float = 255f, resizeW : Int = -1, resizeH : Int = -1): BytesToBGRImg =
new BytesToBGRImg(normalize, resizeW, resizeH)
}
/**
* Convert a byte record to BGR image. The format is, first 4 bytes is width, the next 4 bytes is
* height, and the last is pixels coming with BGR order.
* @param normalize
*/
class BytesToBGRImg(normalize: Float, resizeW : Int = -1, resizeH : Int = -1)
extends Transformer[ByteRecord, LabeledBGRImage] {
private val buffer = new LabeledBGRImage()
override def apply(prev: Iterator[ByteRecord]): Iterator[LabeledBGRImage] = {
prev.map(rawData => {
buffer.copy(getImgData(rawData, resizeW, resizeH), normalize).setLabel(rawData.label)
})
}
private def getImgData (record : ByteRecord, resizeW : Int, resizeH : Int)
: Array[Byte] = {
if (resizeW == -1) {
return record.data
} else {
val rawData = record.data
val imgBuffer = ByteBuffer.wrap(rawData)
val width = imgBuffer.getInt
val height = imgBuffer.getInt
val bufferedImage : BufferedImage
= new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR)
val outputImagePixelData = bufferedImage.getRaster.getDataBuffer
.asInstanceOf[DataBufferByte].getData
System.arraycopy(imgBuffer.array(), 8,
outputImagePixelData, 0, outputImagePixelData.length)
BGRImage.resizeImage(bufferedImage, resizeW, resizeH)
}
}
}