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93 lines
3.2 KiB
C++
93 lines
3.2 KiB
C++
//#include <iostream>
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// Blackborder includes
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#include <blackborder/BlackBorderProcessor.h>
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using namespace hyperion;
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BlackBorderProcessor::BlackBorderProcessor(const unsigned unknownFrameCnt,
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const unsigned borderFrameCnt,
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const unsigned blurRemoveCnt,
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uint8_t blackborderThreshold) :
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_unknownSwitchCnt(unknownFrameCnt),
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_borderSwitchCnt(borderFrameCnt),
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_blurRemoveCnt(blurRemoveCnt),
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_detector(blackborderThreshold),
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_currentBorder({true, -1, -1}),
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_previousDetectedBorder({true, -1, -1}),
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_consistentCnt(0),
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_inconsistentCnt(10)
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{
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// empty
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}
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BlackBorder BlackBorderProcessor::getCurrentBorder() const
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{
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return _currentBorder;
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}
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bool BlackBorderProcessor::updateBorder(const BlackBorder & newDetectedBorder)
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{
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// the new changes ignore false small borders (no reset of consistance)
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// as long as the previous stable state returns within 10 frames
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// and will only switch to a new border if it is realy detected stable >50 frames
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// sometimes the grabber delivers "bad" frames with a smaller black border (looks like random number every few frames and even when freezing the image)
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// maybe some interferences of the power supply or bad signal causing this effect - not exactly sure what causes it but changing the power supply of the converter significantly increased that "random" effect on my system
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// (you can check with the debug output below or if you want i can provide some output logs)
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// this "random effect" caused the old algorithm to switch to that smaller border immediatly, resulting in a too small border being detected
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// makes it look like the border detectionn is not working - since the new 3 line detection algorithm is more precise this became a problem specialy in dark scenes
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// wisc
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// std::cout << "cur: " << _currentBorder.verticalSize << " " << _currentBorder.horizontalSize << " new: " << newDetectedBorder.verticalSize << " " << newDetectedBorder.horizontalSize << " c:i " << _consistentCnt << ":" << _inconsistentCnt << std::endl;
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// set the consistency counter
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if (newDetectedBorder == _previousDetectedBorder)
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{
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++_consistentCnt;
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_inconsistentCnt = 0;
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}
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else
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{
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++_inconsistentCnt;
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if (_inconsistentCnt <= 10)// few inconsistent frames
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{
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//discard the newDetectedBorder -> keep the consistent count for previousDetectedBorder
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return false;
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}
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// the inconsistency threshold is reached
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// -> give the newDetectedBorder a chance to proof that its consistent
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_previousDetectedBorder = newDetectedBorder;
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_consistentCnt = 0;
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}
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// check if there is a change
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if (_currentBorder == newDetectedBorder)
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{
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// No change required
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_inconsistentCnt = 0; // we have found a consistent border -> reset _inconsistentCnt
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return false;
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}
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bool borderChanged = false;
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if (newDetectedBorder.unknown)
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{
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// apply the unknown border if we consistently can't determine a border
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if (_consistentCnt == _unknownSwitchCnt)
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{
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_currentBorder = newDetectedBorder;
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borderChanged = true;
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}
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}
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else
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{
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// apply the detected border if it has been detected consistently
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if (_currentBorder.unknown || _consistentCnt == _borderSwitchCnt)
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{
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_currentBorder = newDetectedBorder;
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borderChanged = true;
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}
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}
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return borderChanged;
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} |