Not sure how to use ignore element feature

[qamatters]

I am exploring ashot for visual testing in our project but it seems like this ignore element feature, is not very clear, because of that, we are not able to use it. Let me explain my use case:

I have a webpage where a image appears which I want to exclude.

This is how I am taking screenshot:

public static Screenshot initiateImageCompareWithIgnoringElement() { return new AShot() .addIgnoredElement(By.xpath("//img[@alt = 'Automation']")) // ignored element(s) .takeScreenshot(driver); }

`
@test ()
public void testHomePageIgnoringDynamicContent(Method method) throws Exception {
seleniumBase.launchHomePage();
Thread.sleep(1000*10);
String actualImage = method.getName();
String expectedImage = method.getName();
String diffImage = method.getName();

   Robot robot = new Robot();
    robot.mouseMove(0, 0);

    Screenshot actualScreenshot = RepoPage.initiateImageCompareWithIgnoringElement();
    actualScreenshot.setIgnoredAreas(actualScreenshot.getIgnoredAreas());

    File actualFile = new File(actualDir + actualImage + ".png");
    ImageIO.write(actualScreenshot.getImage(), "png", actualFile);

    Screenshot expectedScreenshot = new Screenshot(ImageIO.read(new File(expectedDir + expectedImage+ ".png")));
    ImageDiff diff = new ImageDiffer().makeDiff(expectedScreenshot,actualScreenshot);

    int size = diff.getDiffSize();
    if (size != 0) {
        File diffFile = new File(markedImagesDir +diffImage+ ".png");
        ImageIO.write(diff.getMarkedImage(), "png", diffFile);
        throw new Exception("There are some bugs on the page");
    }
}

`

May I know what exactly is missing here because as per doc, I dont think, anything else is needed.