Java 以编程方式更改BMP文件
我想加载一个bmp文件（Java）并用Java程序的语法处理图像数据。我该怎么做？我尝试加载图像，如下所示：Java 以编程方式更改BMP文件,java,file,bmp,Java,File,Bmp,我想加载一个bmp文件（Java）并用Java程序的语法处理图像数据。我该怎么做？我尝试加载图像，如下所示： public static void main(String[] args) { System.out.println("START"); loadbitmap lbm = new loadbitmap(); lbm.loadBMPFile(); System.out.println("
public static void main(String[] args) {
System.out.println("START");
loadbitmap lbm = new loadbitmap();
lbm.loadBMPFile();
System.out.println("END");
}
private void loadBMPFile()
{
{
try{
FileInputStream fstream = new FileInputStream("sample_fingerprint_grayscale.bmp");
DataInputStream in = new DataInputStream(fstream);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
String inputString;
while ((inputString = br.readLine()) != null) {
readBMPFile.add(inputString);
}
in.close();
}
catch (Exception e){
System.out.println("IN ERROR");
System.err.println("Error: " + e.getMessage());
}
System.out.println("IN loadBMPFile");
System.out.println("BMP size is " + readBMPFile.size());
System.out.println(readBMPFile.get(2));
}
}
}
START
IN loadBMPFile
BM¸U
(At this point there is a large amount of gibberish characters that won't paste into Stack Overflow)
END
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BMU6（Q
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BuffereImage也可能会被更改，因此非常适合修改。您考虑过BMP文件的头吗？按s行读取BMP不是一个好方法。给我们看一个输出示例。@FlopCoder我考虑过头。我的计划是确定文件中的图像数据从何处开始，然后在数组中从那里操作它。To第二点，我开始明白，将BMP读入字符串数组可能不是一个好方法。我在谷歌上搜索了一段时间，但我找不到如何读入BMP数据以便修改。大多数谷歌结果都是关于加载图像以显示，这不是我需要的。谢谢您的关注。@CodeBlue Samp提供了le输出。它看起来像是在加载数据，但不是十六进制格式，而是字符格式。你考虑过BMP文件的头吗？而且这不是一种按s行读取BMP的好方法。给我们看一个输出示例。@FlopCoder我考虑过头。我的计划是确定图像数据在文件中的起始位置，然后从我在数组中。关于你的第二点，我开始明白将BMP读入字符串数组可能不是一个好方法。我在谷歌上搜索了一段时间，但我找不到如何读入BMP数据以便更改它。大多数谷歌搜索结果都与加载图像以显示有关，这不是我需要的。谢谢你您的注意。@CodeBlue提供了示例输出。它看起来像是在加载数据，但不是十六进制形式，而是字符形式。
BufferedImage img = ImageIO.read(new File("... .bmp"));