Java 找不到符号变量ArrayIO
我正在编写一个程序来计算两幅图像的峰值信噪比(psnr)。编译以下代码时出现以下错误:Java 找不到符号变量ArrayIO,java,arrays,symbols,Java,Arrays,Symbols,我正在编写一个程序来计算两幅图像的峰值信噪比(psnr)。编译以下代码时出现以下错误: Psnr.java:35: cannot find symbol symbol : variable ArrayIO location: class Psnr ArrayIO.readByteArray(args[2], img1, nrows, ncols); Psnr.java import java.io.*; public class Psnr { public static double
Psnr.java:35: cannot find symbol
symbol : variable ArrayIO
location: class Psnr
ArrayIO.readByteArray(args[2], img1, nrows, ncols);
Psnr.java
import java.io.*;
public class Psnr {
public static double log10(double x) {
return Math.log(x)/Math.log(10);
}
public static void main (String[] args) {
int nrows, ncols;
int img1[][], img2[][];
double peak, signal, noise, mse;
if (args.length != 4) {
System.out.println("Usage: Psnr <nrows> <ncols> <img1> <img2>");
return;
}
nrows = Integer.parseInt(args[0]);
ncols = Integer.parseInt(args[1]);
img1 = new int[nrows][ncols];
img2 = new int[nrows][ncols];
ArrayIO.readByteArray(args[2], img1, nrows, ncols);
ArrayIO.readByteArray(args[3], img2, nrows, ncols);
signal = noise = peak = 0;
for (int i=0; i<nrows; i++) {
for (int j=0; j<ncols; j++) {
signal += img1[i][j] * img1[i][j];
noise += (img1[i][j] - img2[i][j]) * (img1[i][j] - img2[i][j]);
if (peak < img1[i][j])
peak = img1[i][j];
}
}
mse = noise/(nrows*ncols); // Mean square error
System.out.println("MSE: " + mse);
System.out.println("SNR: " + 10*log10(signal/noise));
System.out.println("PSNR(max=255): " + (10*log10(255*255/mse)));
System.out.println("PSNR(max=" + peak + "): " + 10*log10((peak*peak)/mse));
}
}
import java.io.*;
公共类信噪比{
公共静态双对数10(双x){
返回Math.log(x)/Math.log(10);
}
公共静态void main(字符串[]args){
int nrows,ncols;
int img1[]],img2[]];
双峰,信号,噪声,均方误差;
如果(参数长度!=4){
System.out.println(“用法:峰值信噪比”);
返回;
}
nrows=Integer.parseInt(args[0]);
ncols=Integer.parseInt(args[1]);
img1=新整数[nrows][ncols];
img2=新整数[nrows][ncols];
ArrayIO.readByteArray(args[2],img1,nrows,ncols);
ArrayIO.readByteArray(args[3],img2,nrows,ncols);
信号=噪声=峰值=0;
for(int i=0;iArrayIO不是来自java.io
包的类。您需要导入正确的包(import
语句),并将库添加到类路径(ArrayIO不是java API的一部分)那会是什么?我似乎找不到它。也找不到它-我从来没有听说过一个名为ArrayIO
的Java类。谷歌也没有帮助…也许你从另一个来源获取/改编了代码,请看一看。也许它是另一种编程语言?