Java滑動圖片驗(yàn)證是一種常見的人機(jī)驗(yàn)證方式，用于防止機(jī)器人攻擊和惡意登陸。其原理是將原始圖片劃分為若干小塊，在滑動驗(yàn)證過程中，用戶需要按照規(guī)定軌跡滑動圖片，從而將小塊復(fù)原成完整的原始圖片，同時(shí)記錄滑動過程中的軌跡信息，進(jìn)行驗(yàn)證。以下是其實(shí)現(xiàn)過程。

//1. 將原始圖片劃分為小塊
public BufferedImage[] splitImage(BufferedImage image, int xNum, int yNum) {
int width = image.getWidth() / xNum;
int height = image.getHeight() / yNum;
BufferedImage[] images = new BufferedImage[xNum * yNum];
int index = 0;
for (int x = 0; x< xNum; x++) {
for (int y = 0; y< yNum; y++) {
images[index] = new BufferedImage(width, height, image.getType());
Graphics2D g = images[index++].createGraphics();
g.drawImage(image, 0, 0, width, height, width * x, height * y, width * (x + 1), height * (y + 1), null);
g.dispose();
}
}
return images;
}
//2. 根據(jù)軌跡信息拼接圖片
public BufferedImage mergeImage(BufferedImage[] images, ListtrackPoints, int gap) {
int width = images[0].getWidth() + gap;
int height = images[0].getHeight();
BufferedImage image = new BufferedImage(width * images.length - gap, height, images[0].getType());
Graphics2D g = image.createGraphics();
int x = 0;
for (Point point : trackPoints) {
g.drawImage(images[x], point.x, point.y, null);
x++;
}
g.dispose();
return image;
}
//3. 計(jì)算軌跡信息
public int[] getDistance(BufferedImage image) {
int width = image.getWidth();
int height = image.getHeight();
int[] distance = new int[height];
for (int y = 0; y< height; y++) {
for (int x = 0; x< width; x++) {
Color color = new Color(image.getRGB(x, y));
if (color.getRed() == 255 && color.getGreen() == 0 && color.getBlue() == 0) {
distance[y] = x;
break;
}
}
}
return distance;
}

大致實(shí)現(xiàn)過程就是將原圖分割成小塊，拼接成滑動后的圖片，然后獲取滑動的軌跡信息。而對于驗(yàn)證碼的識別及驗(yàn)證，可以選擇使用機(jī)器學(xué)習(xí)、深度學(xué)習(xí)等技術(shù)進(jìn)行處理，并結(jié)合大量訓(xùn)練集進(jìn)行訓(xùn)練，提高驗(yàn)證的準(zhǔn)確性。