The example introduced in this article is to use java to obtain the color value of the image, and then we identify the verification code based on the image. This is a basic verification code that can only be recognized.
Reading the color value of an image is the basic logic of image recognition.
| The Code is as follows: |
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Package com. javaer. image;
Import java. awt. AWTException;
Import java. awt. Dimension;
Import java. awt. Rectangle;
Import java. awt. Robot;
Import java. awt. Toolkit;
Import java. awt. image. BufferedImage;
Import java. io. File;
Import javax. imageio. ImageIO;
Public class ReadColor {
/**
* Read the RGB value of an image.
* @ Throws Exception
*/
Public void getImagePixel (String image) throws Exception {
Int [] rgb = new int [3];
File file = new File (image );
BufferedImage bi = null;
Try {
Bi = ImageIO. read (file );
} Catch (Exception e ){
E. printStackTrace ();
}
Int width = bi. getWidth ();
Int height = bi. getHeight ();
Int minx = bi. getMinX ();
Int miny = bi. getMinY ();
System. out. println ("width =" + width + ", height =" + height + ".");
System. out. println ("minx =" + minx + ", miniy =" + miny + ".");
For (int I = minx; I <width; I ++ ){
For (int j = miny; j Int pixel = bi. getRGB (I, j); // The following three lines of code convert a number to an RGB number.
Rgb [0] = (pixel & 0xff0000)> 16;
Rgb [1] = (pixel & 0xff00)> 8;
Rgb [2] = (pixel & 0xff );
System. out. println ("I =" + I + ", j =" + j + ":(" + rgb [0] + "," + rgb [1] + ", "+ rgb [2] + ")");
}
}
}
/**
* Return the screen color value.
*
* @ Param x
* @ Param y
* @ Return
* @ Throws AWTException
*/
Public int getScreenPixel (int x, int y) throws AWTException {// the return value of the function is the RGB value of the color.
Robot rb = null; // class in the java. awt. image package, which can be used to capture the screen, that is, screenshot.
Rb = new Robot ();
Toolkit tk = Toolkit. getDefaultToolkit (); // get the default Toolkit
Dimension di = tk. getScreenSize (); // screen size
System. out. println (di. width );
System. out. println (di. height );
Rectangle rec = new Rectangle (0, 0, di. width, di. height );
BufferedImage bi = rb. createScreenCapture (rec );
Int pixelColor = bi. getRGB (x, y );
Return 16777216 + pixelColor; // The value of pixelColor is negative. After practice, the maximum value of color is the actual color value.
}
/**
* @ Param args
*/
Public static void main (String [] args) throws Exception {
Int x = 0;
ReadColor rc = new ReadColor ();
X = rc. getScreenPixel (100,345 );
System. out. println (x + "-");
Rc. getImagePixel ("/a.jpg ");
}
} |
