我正在进行AR项目,需要捕获当前帧并将其保存到图库。我可以使用AR核心中的Frame类获取图像,但是图像的格式为YUV_420_888。我已经尝试了很多解决方案以将其隐藏到位图,但无法解决。
这就是我转换为jpeg的方式。
public Bitmap imageToBitmap(Image image, float rotationDegrees) {
assert (image.getFormat() == ImageFormat.NV21);
// NV21 is a plane of 8 bit Y values followed by interleaved Cb Cr
ByteBuffer ib = ByteBuffer.allocate(image.getHeight() * image.getWidth() * 2);
ByteBuffer y = image.getPlanes()[0].getBuffer();
ByteBuffer cr = image.getPlanes()[1].getBuffer();
ByteBuffer cb = image.getPlanes()[2].getBuffer();
ib.put(y);
ib.put(cb);
ib.put(cr);
YuvImage yuvImage = new YuvImage(ib.array(),
ImageFormat.NV21, image.getWidth(), image.getHeight(), null);
ByteArrayOutputStream out = new ByteArrayOutputStream();
yuvImage.compressToJpeg(new Rect(0, 0,
image.getWidth(), image.getHeight()), 50, out);
byte[] imageBytes = out.toByteArray();
Bitmap bm = BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length);
Bitmap bitmap = bm;
// On android the camera rotation and the screen rotation
// are off by 90 degrees, so if you are capturing an image
// in "portrait" orientation, you'll need to rotate the image.
if (rotationDegrees != 0) {
Matrix matrix = new Matrix();
matrix.postRotate(rotationDegrees);
Bitmap scaledBitmap = Bitmap.createScaledBitmap(bm,
bm.getWidth(), bm.getHeight(), true);
bitmap = Bitmap.createBitmap(scaledBitmap, 0, 0,
scaledBitmap.getWidth(), scaledBitmap.getHeight(), matrix, true);
}
return bitmap;
}
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我来说两句