如何使用SeleniumWebDriver和Java从图像（captcha）读取文本
我有注册网页，但在最后的验证码显示 我无法从图像中读取文本。我将提到代码和输出如何使用SeleniumWebDriver和Java从图像（captcha）读取文本,java,selenium,selenium-webdriver,captcha,Java,Selenium,Selenium Webdriver,Captcha,我有注册网页，但在最后的验证码显示 我无法从图像中读取文本。我将提到代码和输出 @Test public void loginTest() throws InterruptedException { System.out.println("Testing"); driver.get("https://customer.onlinelic.in/ForgotPwd.htm"); WebElement element = driver.findElement(By.xpat
@Test
public void loginTest() throws InterruptedException {
System.out.println("Testing");
driver.get("https://customer.onlinelic.in/ForgotPwd.htm");
WebElement element = driver.findElement(By.xpath("//*[@id='forgotPassword']/table/tbody/tr[5]/td[3]/img"));
System.out.println(" get the instance ");
String elementTest = element.getAttribute("src");
System.out.println("Element : " + elementTest);
}
无法读取验证码。如果您可以读取验证码，那么使用验证码是没有意义的。忘记密码表单位于iframe中。这就是硒找不到元素的原因。您需要首先切换到保存表单的iframe，然后运行findelement。您的xpath是正确的 使用
driver.switchTo（）.frame（arg0）为了得到验证码文本，我不明白你所说的“存储测试和比较”是什么意思。理想情况下，您不应该能够从验证码中读取文本（正如其他人所提到的）。我见过的另一种方法是，在开发和QA环境中将captcha值存储为
alt textalt text我有一个解决方案，将为一个特定的网站工作。您可以获取整个页面的快照并获取验证码图像。然后将captcha图像的整个宽度除以字符总数（在captcha中通常是常量）。现在我们有了验证码图像的各个字符。通过重新加载页面收集验证码的所有可能字符 一旦你有了所有可能的字符，然后给任何验证码图像，你可以比较它的字符与我们的图像，并决定它是哪个字母或数字 应采取的步骤：
private static BufferedImage cropImage(File filePath, int x, int y, int w,
int h) {
try {
BufferedImage originalImgage = ImageIO.read(filePath);
BufferedImage subImgage = originalImgage.getSubimage(x, y, w, h);
return subImgage;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
private static BufferedImage cropImage(File filePath, int x, int y, int w,
int h) {
try {
BufferedImage originalImgage = ImageIO.read(filePath);
BufferedImage subImgage = originalImgage.getSubimage(x, y, w, h);
return subImgage;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
bi1 = ImageIO.read(f1);
bi2 = ImageIO.read(f2);
float diff = 0;
for (int i = 0; i < width; i++) {
for (int j = 0; j < height; j++) {
int rgb1 = bi1.getRGB(i, j);
int rgb2 = bi2.getRGB(i, j);
int b1 = rgb1 & 0xff;
int g1 = (rgb1 & 0xff00) >> 8;
int r1 = (rgb1 & 0xff0000) >> 16;
int b2 = rgb2 & 0xff;
int g2 = (rgb2 & 0xff00) >> 8;
int r2 = (rgb2 & 0xff0000) >> 16;
diff += Math.abs(b1 - b2);
diff += Math.abs(g1 - g2);
diff += Math.abs(r1 - r2);
}
}
return diff;
}
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import javax.imageio.ImageIO;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;
import com.asprise.util.ocr.OCR;
public class ExtractImage {
WebDriver driver;
@BeforeTest
public void setUpDriver() {
driver = new FirefoxDriver();
}
@Test
public void start() throws IOException{
/*Navigate to http://www.mythoughts.co.in/2013/10/extract-and-verify-text-from-image.html page
* and get the image source attribute
*
*/
driver.get("http://www.mythoughts.co.in/2013/10/extract-and-verify-text-from-image.html");
String imageUrl=driver.findElement(By.xpath("//*[@id='post-body-5614451749129773593']/div[1]/div[1]/div/a/img")).getAttribute("src");
System.out.println("Image source path : \n"+ imageUrl);
URL url = new URL(imageUrl);
Image image = ImageIO.read(url);
String s = new OCR().recognizeCharacters((RenderedImage) image);
System.out.println("Text From Image : \n"+ s);
System.out.println("Length of total text : \n"+ s.length());
driver.quit();
/* Use below code If you want to read image location from your hard disk
*
BufferedImage image = ImageIO.read(new File("Image location"));
String imageText = new OCR().recognizeCharacters((RenderedImage) image);
System.out.println("Text From Image : \n"+ imageText);
System.out.println("Length of total text : \n"+ imageText.length());
*/
}
}