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Only try to mirror images when tryHarder is set to true

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Additionally, this is only done until a match is found, instead of
always applying mirroring for the 2nd, 3rd and 4th frames.
This commit is contained in:
Milian Wolff 2017-01-10 12:48:59 +01:00
parent cafad4a9c0
commit 7937cb84b5
1 changed files with 19 additions and 21 deletions
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40
examples/QZXingLive/QZXingFilter.cpp
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@ -180,26 +180,6 @@ void QZXingFilterRunnable::processVideoFrameProbed(SimpleVideoFrame & videoFrame
if (!captureRect.isEmpty())
image = image.copy(captureRect);
/// The frames we get from the camera may be reflected horizontally or vertically
/// As the decoder can't handle reflected frames, we swap them in all possible frames, changing the swap mode each frame.
/// TODO: Maybe there is a better way to know this orientation beforehand? Or should we try decoding all of them?
switch (i % 4)
{
case 0:
image = image.mirrored(false, false);
break;
case 1:
image = image.mirrored(true, false);
break;
case 2:
image = image.mirrored(false, true);
break;
case 3:
image = image.mirrored(true, true);
break;
}
// qDebug() << "image mirrored type == " << (i % 4);
// qDebug() << "image.size() " << image.size();
// qDebug() << "image.format() " << image.format();
@ -207,6 +187,24 @@ void QZXingFilterRunnable::processVideoFrameProbed(SimpleVideoFrame & videoFrame
// path = QStandardPaths::writableLocation(QStandardPaths::PicturesLocation) + "/qrtest";
// qDebug() << "saving image " + QString::number(i) + " at: "
// << path << image.save(path + "/test_" + QString::number(i) + ".png");
// qDebug() << i << image.format() << videoFrame.pixelFormat;
filter->decoder.decodeImage(image);
QString tag = filter->decoder.decodeImage(image, image.width(), image.height());
const bool tryHarder = filter->decoder.getTryHarder();
/// The frames we get from the camera may be reflected horizontally or vertically
/// As the decoder can't handle reflected frames, we swap them in all possible frames, changing the swap mode each frame.
/// TODO: Maybe there is a better way to know this orientation beforehand? Or should we try decoding all of them?
if (tag.isEmpty() && tryHarder) {
image = image.mirrored(true, false);
tag = filter->decoder.decodeImage(image, image.width(), image.height());
}
if (tag.isEmpty() && tryHarder) {
image = image.mirrored(false, true);
tag = filter->decoder.decodeImage(image, image.width(), image.height());
}
if (tag.isEmpty() && tryHarder) {
image = image.mirrored(true, true);
tag = filter->decoder.decodeImage(image, image.width(), image.height());
}
}