scala 读雷达数据文件，生成png

使用scala语言，从雷达文件中读取二维矩阵，并将矩阵保存成png

代码如下：

import scala.io.Source
import java.io._
import java.awt.Image
import java.awt.Toolkit
import java.awt.image._
import javax.imageio._
import java.awt.Color

import scala.reflect.ClassTag

object RadareTest {
  def main(arges:Array[String]){
    
     //0~15对应的颜色值
    val cormap = Map(0-> new Color(0,0,0).getRGB, 
        1->new Color(170,170,170).getRGB, 
        2->new Color(118,118,118).getRGB, 
        3->new Color(0,254,254).getRGB,
        4->new Color(0,174,174).getRGB,
        5->new Color(0,254,0).getRGB, 
        6->new Color(0,142,0).getRGB, 
        7->new Color(254,0,254).getRGB,
        8->new Color(174,50,124).getRGB, 
        9->new Color(0,0,254).getRGB, 
        10->new Color(50,0,150).getRGB, 
        11->new Color(254,254,0).getRGB,
        12->new Color(254,170,0).getRGB, 
        13->new Color(254,0,0).getRGB, 
        14->new Color(174,0,0).getRGB, 
        15->new Color(254,254,254).getRGB)

    //读文件，将文件内容转化为二维int数组
   val file = Source.fromFile("E:/txt/txt_cr_Z9010_20130722/cr_int1_Z9010_20130722_001.txt")
   
    val arrInts = file.mkString.split("\s+").filter(_.length > 0)
    .map(e=>cormap(e.toInt)).grouped(552).toArray
    
    //矩阵转置， 使二维数据符合在图片上的位置：从西向东，从南向北
    val rc = transpose(arrInts).map(row=>row.reverse)
    val arrs = transpose(rc).flatten
    
    //关闭文件
    file.close()

    //生成新图片  
    val width = 552
    val height = 424
    val imageNew  =  new  BufferedImage(width,height,BufferedImage.TYPE_INT_RGB)
    imageNew.setRGB(0,0,width,height,arrs,0,width) //设置RGB

    val  outFile  = new File("E:/Z9010_20130722_001.png")
    val bb = ImageIO.write(imageNew,  "png",  outFile) //写图片  
    
    println("write over!")
   
  }
  
  /*
   * 泛型函数 矩阵转置，行列互换  
  */
  def transpose[T:ClassTag](xss: Array[Array[T]]): Array[Array[T]] ={
   for (i <- Array.range(0, xss(0).length)) yield
    for (xs <- xss) yield xs(i)
  }
  
}

生成的图片如下：