Question

我想让我的Java程序将实际屏幕与图片进行比较（截图）。

我不知道是否可能，但我已经在Jitbit（宏录制器）中看到了它，我想自己实现它。（也许用这个例子你明白我的意思）。

由于

---- -----编辑换句话说，是否可以检查图像是否显示？要查找并比较屏幕中的像素？

Answer 1

您可以分两步完成此操作：

使用awt.Robot

创建屏幕截图

BufferedImage image = new Robot().createScreenCapture(new Rctangle(Toolkit.getDefaultToolkit().getScreenSize()));
ImageIO.write(image, "png", new File("/screenshot.png"));

使用类似的内容比较屏幕截图：How to check if two images are similar or not using openCV in java?

Answer 2

查看Sikuli项目。他们的自动化引擎基于图像比较。

我想，在内部，他们仍在使用OpenCV来计算图像相似度，但是有很多OpenCV Java绑定，例如this，允许从Java这样做。

项目源代码位于：https://github.com/sikuli/sikuli

Answer 3

好的，所以几天后我找到了答案。

此方法采用屏幕截图：

public static void takeScreenshot() {
        try {
            BufferedImage image = new Robot().createScreenCapture(new Rectangle(490,490,30,30));
/* this two first parameters are the initial X and Y coordinates. And the last ones are the increment of each axis*/
            ImageIO.write(image, "png", new File("C:\\Example\\Folder\\capture.png"));

        } catch (IOException e) {
            e.printStackTrace();
        } catch (HeadlessException e) {
            e.printStackTrace();
        } catch (AWTException e) {
            e.printStackTrace();
        }
    }

另一个将比较图像

public static String compareImage() throws Exception {

// savedImage is the image we want to look for in the new screenshot.
// Both must have the same width and height

    String c1 = "savedImage";
    String c2 = "capture";

    BufferedInputStream in = new BufferedInputStream(new FileInputStream(c1
            + ".png"));
    BufferedInputStream in1 = new BufferedInputStream(new FileInputStream(
            c2 + ".png"));
    int i, j;
    int k = 1;
    while (((i = in.read()) != -1) && ((j = in1.read()) != -1)) {
        if (i != j) {
            k = 0;
            break;
        }
    }

    in.close();
    in1.close();
    if (k == 1) {

        System.out.println("Ok...");
        return "Ok";            

    } else {
        System.out.println("Fail ...");
        return "Fail";
    }
}

Answer 4

您可以尝试aShot：documentation link

1）aShot可以忽略您用特殊颜色标记的区域。

2）aShot可以提供显示图像之间差异的图像。

private void compareTowImages(BufferedImage expectedImage, BufferedImage actualImage) {
    ImageDiffer imageDiffer = new ImageDiffer();
    ImageDiff diff = imageDiffer
            .withDiffMarkupPolicy(new PointsMarkupPolicy()
                    .withDiffColor(Color.YELLOW))
            .withIgnoredColor(Color.MAGENTA)
            .makeDiff(expectedImage, actualImage);

    // areImagesDifferent will be true if images are different, false - images the same
    boolean areImagesDifferent = diff.hasDiff();
    if (areImagesDifferent) {
        // code in case of failure 
    } else {
        // Code in case of success
    }
}

要保存具有差异的图像：

private void saveImage(BufferedImage image, String imageName) {
    // Path where you are going to save image
    String outputFilePath = String.format("target/%s.png", imageName);
    File outputFile = new File(outputFilePath);
    try {
        ImageIO.write(image, "png", outputFile);
    } catch (IOException e) {
        // Some code in case of failure
    }
}

将图像与实际屏幕进行比较

4 个答案: