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Merge pull request #448 from wisc17/blackborder_alternative

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Blackborder Improved

Former-commit-id: 762bb519ebefd6755362178fdc5b9d5ed3508c3b
This commit is contained in:
tvdzwan
2016-01-13 22:43:30 +01:00
parent 491c7c4d87 4bc11548b4
commit 424c00e767
3 changed files with 40 additions and 35 deletions
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17
libsrc/blackborder/BlackBorderProcessor.cpp
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@@ -14,7 +14,8 @@ BlackBorderProcessor::BlackBorderProcessor(const unsigned unknownFrameCnt,
_detector(blackborderThreshold),
_currentBorder({true, -1, -1}),
_previousDetectedBorder({true, -1, -1}),
_consistentCnt(0)
_consistentCnt(0),
_inconsistentCnt(0)
{
// empty
}
@@ -30,11 +31,13 @@ bool BlackBorderProcessor::updateBorder(const BlackBorder & newDetectedBorder)
if (newDetectedBorder == _previousDetectedBorder)
{
++_consistentCnt;
_inconsistentCnt = 0;
}
else
{
_previousDetectedBorder = newDetectedBorder;
_consistentCnt = 0;
++_inconsistentCnt;
}
// check if there is a change
@@ -64,14 +67,18 @@ bool BlackBorderProcessor::updateBorder(const BlackBorder & newDetectedBorder)
}
else
{
// apply smaller borders immediately
if (newDetectedBorder.verticalSize < _currentBorder.verticalSize)
bool stable = (_consistentCnt >= 10) || (_inconsistentCnt >=30 );
//more then 10 consistent seems like a new size not only a short flicker
//more then 30 inconsistent seems like the image is changing a lot and we need to set smaller border
// apply smaller borders (almost) immediately -> avoid switching for "abnormal" frames
if ( (newDetectedBorder.verticalSize < _currentBorder.verticalSize) && (stable) )
{
_currentBorder.verticalSize = newDetectedBorder.verticalSize;
borderChanged = true;
}
if (newDetectedBorder.horizontalSize < _currentBorder.horizontalSize)
if ( (newDetectedBorder.horizontalSize < _currentBorder.horizontalSize) && (stable) )
{
_currentBorder.horizontalSize = newDetectedBorder.horizontalSize;
borderChanged = true;
@@ -80,4 +87,4 @@ bool BlackBorderProcessor::updateBorder(const BlackBorder & newDetectedBorder)
}
return borderChanged;
}
}