AugmentedImageDatabase Arcore：添加多个图像

Question

我有图像的文件夹，但我不能将它们添加到数据库。他们有特定的名字。应用说“AR会话失败”这是我的代码：

  public void setupDatabase(Config config, Session session)
    {
        String filepath = getIntent().getStringExtra("filepath");
        Log.d ("AID", "Veriable:" + filepath);
        File dir = new File (filepath);
        File[] files = dir.listFiles();

        AugmentedImageDatabase aid = new AugmentedImageDatabase(session);

        for (int i = 0; i < files.length; i++)
        {
            if (files[i].getName().startsWith("arimage"))
            {
                String filename = files[i].getName ();
                Log.d ("AID", "FileName:" + files[i].getName ());
                Bitmap arcontentBitmap =loadAugmentedImage(files[i]);
                Log.d ("AID", "Files:" + files[i].getPath ());
                String imagename = filename.substring(0, filename.length() - 4);
                Log.d ("AID", "NameImage:" + imagename);

                aid.addImage(imagename, arcontentBitmap);

            }

        }
        config.setAugmentedImageDatabase(aid);
    }

方法loadAugmentedImage

private Bitmap loadAugmentedImage(File file)
    {
        try (InputStream is = new FileInputStream (file))
        {
            return BitmapFactory.decodeStream(is);
        }
        catch (IOException e)
        {
            Log.e("ImageLoad", "IO Exception", e);
        }
        return null;
    }

Answer 1

尝试用InputStream is = new FileInputStream (file)替换InputStream is = getAssets().open(file)

我看，你创建了新的图像数据库，而不是加载所有的图像。这不是一个好习惯，因为加载一个图像大约需要30毫秒。因此，如果您从一开始就需要所有这些图像，那么您应该在编译时加载图像数据库。您应该使用arcoreimg来创建数据库，此选项还可以选择在现实世界中设置图像大小，这有助于检测。比仅加载数据库：

AugmentedImageDatabase augmentedImageDatabase = new AugmentedImageDatabase(session);
    try(InputStream inputStream = getAssets().open("imgdatabase.imgdb")){
        augmentedImageDatabase = AugmentedImageDatabase.deserialize(session, inputStream);
    } catch (IOException e) {
        Log.e(TAG, "IO exception loading augmented image database.", e);
        e.printStackTrace();
    }
    config.setAugmentedImageDatabase(augmentedImageDatabase);

但是不要在应用程序开头加载您不需要的图像。因为您的应用会尝试检测所有图像，这会对性能产生很大影响。

Answer 2

我将缓冲区大小从1024改为4096下载文件和解压缩方法。我将完整的图像路径放到我的Method loadAugmentedImage中。

public void setupDatabase(Config config, Session session) 
{
        AugmentedImageDatabase aid = new AugmentedImageDatabase(session);
        Intent intent = getIntent ();
        String filepath = intent.getStringExtra ("filepath");
        Log.d ("AID", "Veriable:" + filepath);
        File directory = new File (filepath);
        File[] files = directory.listFiles ();
        Log.d ("AID", "Size: " + files.length);
        for (int i = 0; i < files.length; i++)
        {

            if (files[i].getName().startsWith("arimage"))
            {
                String filename = files[i].getName ();
                Log.d ("AID", "FileName:" + filename);
                Bitmap arcontentBitmap = loadAugmentedImage(files[i].getPath ());
                Log.d ("AID", "FilePath:" + files[i].getPath ());
                Log.d ("AID", "Files:" + files[i].getAbsolutePath ());
                String imagename = filename.substring(0, filename.length() - 4);
                Log.d ("AID", "NameImage:" + imagename);
                aid.addImage(imagename, arcontentBitmap);
            }
        }
        config.setAugmentedImageDatabase(aid);
}

方法loadAugmentedImage

private Bitmap loadAugmentedImage(String file)
    {
        try (InputStream is = new FileInputStream (file))
        {
            return BitmapFactory.decodeStream(is);
        }
        catch (IOException e)
        {
            Log.e("loadAugmentedImage", "IO Exception", e);
        }
        return null;
    }