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how to find acii values of image file in java

1 reply on 1 page. Most recent reply: Feb 26, 2002 11:22 AM by Charles Bell

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jayakumar perumal

Posts: 16
Nickname: jai
Registered: Feb, 2002

how to find acii values of image file in java

Posted: Feb 25, 2002 4:12 PM

hi
i need to find the ascii value of the pixels in an image file for manipulation. i would appreciate if any one can let me know how to do it.

Charles Bell

Posts: 519
Nickname: charles
Registered: Feb, 2002

Re: how to find acii values of image file in java

Posted: Feb 26, 2002 11:22 AM

The bytes of an image file can be read the same as any other file.

FileInputStream fis = new FileInputStream(filename);
DataInputStream dis = new DataInputStream(fis);
try{
byte b = ' ';
while ((b = dis.readBYte()) != null){
//do something with the char
}
}catch(EndOfFileException eofe){
System.err.println(eof.getMessage());
}catch(IOException ioe){
System.err.println(ioe.getMessage());
}

DataInputStream has several read methods for the various data types.
Most image files are probably in a binary format, requiring you to read bytes instead of characters.

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