hyperion.ng/libsrc/blackborder/BlackBorderProcessor.cpp
wisc 8f0e1f1199 switch on consistent detection only and also check right side and bottom pixel
Former-commit-id: 4da53a39918a3676c707215daa66d8ae263ed92a
2016-01-21 20:25:08 +01:00

93 lines
3.2 KiB
C++

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