帮我用java 使用 opencv + Tesseract 写一个识别验证码文字并标注文字坐标

好的，我可以帮助您用 Java 使用 OpenCV 和 Tesseract 识别验证码文字并标注文字坐标。

首先，您需要安装 OpenCV 和 Tesseract 的 Java 绑定，并将它们添加到您的项目中。然后，您可以使用 OpenCV 读入图像并使用 Tesseract 识别文字。

下面是一个基本的示例代码，它可以帮助您开始使用 OpenCV 和 Tesseract 进行文字识别：

``` import org.opencv.core.Core; import org.opencv.core.Mat; import org.opencv.core.MatOfRect; import org.opencv.core.Point; import org.opencv.core.Rect; import org.opencv.core.Scalar; import org.opencv.imgcodecs.Imgcodecs; import org.opencv.imgproc.Imgproc; import org.opencv.objdetect.CascadeClassifier;

import com.google.common.io.Files;

import net.sourceforge.tess4j.ITesseract; import net.sourceforge.tess4j.Tesseract; import net.sourceforge.tess4j.TesseractException;

import java.io.File; import java.io.IOException;

public class TextRecognition { public static void main(String[] args) throws IOException, TesseractException { // Load the OpenCV library System.loadLibrary(Core.NATIVE_LIBRARY_NAME);

// Load the image file
    Mat image = Imgcodecs.imread("captcha.png");

    // Convert the image to grayscale
    Mat imageGray = new Mat();
    Imgproc.cvtColor(image, imageGray, Imgproc.COLOR_BGR2GRAY);

    // Use a cascade classifier to detect the characters in the image
    CascadeClassifier classifier = new CascadeClassifier("char_classifier.xml");
    MatOfRect characterRegions = new MatOfRect();
    classifier.detectMultiScale(imageGray, characterRegions);

    // Loop through the character regions and recognize the text in each region
    ITesseract tesseract = new Tesseract();
    tesseract.setLanguage("eng");
    for (Rect rect : characterRegions.toArray()) {
        // Crop the character region from the image
        Mat characterRegion = new Mat(imageGray, rect);

        // Perform OTSU thresholding on the character region
        Mat characterRegionThreshold = new Mat();
        Imgproc.th