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Pixelshift: reduce number of false positive motion detections for red/blue check on transitions between overexposed ańd correctly exposed regions

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This commit is contained in:
heckflosse
2017-03-15 23:24:18 +01:00
parent bdbb808f2d
commit 28015d8c26
1 changed files with 19 additions and 20 deletions
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39
rtengine/pixelshift.cc
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@@ -92,8 +92,11 @@ float nonGreenDiff(float a, float b, float stddevFactor, float eperIso, float nr
}
#endif
float nonGreenDiffCross(float right, float left, float top, float bottom, float centre, float stddevFactor, float eperIso, float nreadIso, float prnu, bool showMotion)
float nonGreenDiffCross(float right, float left, float top, float bottom, float centre, float clippedVal, float stddevFactor, float eperIso, float nreadIso, float prnu, bool showMotion)
{
if(rtengine::max(right, left, top, bottom, centre) > clippedVal) {
return 0.f;
}
// check non green cross
float hDiff = (right + left) * 0.5f - centre;
hDiff *= eperIso;
@@ -549,6 +552,9 @@ void RawImageSource::pixelshift(int winx, int winy, int winw, int winh, const RA
float eperIsoGreen = (eperIso * scaleGreen) * (65535.f / (c_white[1] - c_black[1]));
float eperIsoBlue = (eperIso / scale_mul[2]) * (65535.f / (c_white[2] - c_black[2]));
const float clippedRed = 65535.f / scale_mul[0];
const float clippedBlue = 65535.f / scale_mul[2];
prnu /= 100.f;
stddevFactorGreen *= stddevFactorGreen;
stddevFactorRed *= stddevFactorRed;
@@ -615,7 +621,7 @@ void RawImageSource::pixelshift(int winx, int winy, int winw, int winh, const RA
}
#ifdef _OPENMP
#pragma omp for schedule(dynamic,16)
#pragma omp for schedule(dynamic,16) nowait
#endif
for(int i = winy + 1; i < winh - 1; ++i) {
@@ -683,36 +689,33 @@ void RawImageSource::pixelshift(int winx, int winy, int winw, int winh, const RA
int j = winx + 1;
int c = FC(i, j);
if (c == 2 || ((c & 1) && FC(i, j + 1) == 2)) {
if ((c + FC(i, j + 1)) == 3) {
// row with blue pixels => swap destination pointers for non green pixels
std::swap(nonGreenDest0, nonGreenDest1);
std::swap(greenDest1, greenDest2);
}
// offset to keep the code short. It changes its value between 0 and 1 for each iteration of the loop
unsigned int offset = (c & 1);
offset ^= 1; // 0 => 1 or 1 => 0
unsigned int offset = c & 1;
for(; j < winw - 1; ++j) {
offset ^= 1; // 0 => 1 or 1 => 0
// store the values from the 4 frames into 4 different temporary planes
greenDest1[j] = (*rawDataFrames[1 - offset])[i - offset + 1][j] * greenBrightness[1 - offset];
greenDest2[j] = (*rawDataFrames[3 - offset])[i + offset][j + 1] * greenBrightness[3 - offset];
nonGreenDest0[j] = (*rawDataFrames[(offset << 1) + offset])[i][j + offset] * greenBrightness[(offset << 1) + offset];
nonGreenDest1[j] = (*rawDataFrames[2 - offset])[i + 1][j - offset + 1] * greenBrightness[2 - offset];
offset ^= 1; // 0 => 1 or 1 => 0
}
}
// now that the temporary planes are filled for easy access we do the motion detection
#ifdef PIXELSHIFTDEV
int sum[2] = {0};
#endif
float pixelcount = ((winh - (border + offsY) - (winy + border - offsY)) * (winw - (border + offsX) - (winx + border - offsX))) / 2.f;
#endif
array2D<float> psMask(winw, winh);
#ifdef _OPENMP
#pragma omp parallel
#endif
@@ -732,10 +735,8 @@ void RawImageSource::pixelshift(int winx, int winy, int winw, int winh, const RA
#ifdef PIXELSHIFTDEV
float greenDifMax[gridSize]; // Here we store the maximum differences per Column
#endif
// green channel motion detection checks the grid around the pixel for differences in green channels
#ifdef PIXELSHIFTDEV
if(detectMotion || (adaptive && checkGreen)) {
if(gridSize == 3) {
@@ -828,24 +829,22 @@ void RawImageSource::pixelshift(int winx, int winy, int winw, int winh, const RA
}
#endif
// this is the index for the last column of the grid. Obviously we have to start with gridSize - 1
#ifdef PIXELSHIFTDEV
int lastIndex = gridSize - 1;
float korr = 0.f;
bool blueRow = false;
#endif
float korr = 0.f;
int c = FC(i, j);
bool blueRow = false;
#ifdef PIXELSHIFTDEV
if (c == 2 || ((c & 1) && FC(i, j + 1) == 2)) {
// row with blue pixels => swap destination pointers for non green pixels
blueRow = true;
}
#endif
// offset to keep the code short. It changes its value between 0 and 1 for each iteration of the loop
unsigned int offset = (c & 1);
unsigned int offset = c & 1;
for(; j < winw - (border + offsX); ++j) {
psMask[i][j] = 1.f;
@@ -962,7 +961,7 @@ void RawImageSource::pixelshift(int winx, int winy, int winw, int winh, const RA
float redCentre = psRed[ i ][ j ];
float redRight = psRed[ i ][j + 1];
float redBottom = psRed[i + 1][ j ];
float redDiff = nonGreenDiffCross(redRight, redLeft, redTop, redBottom, redCentre, stddevFactorRed, eperIsoRed, nRead, prnu, showMotion);
float redDiff = nonGreenDiffCross(redRight, redLeft, redTop, redBottom, redCentre, clippedRed, stddevFactorRed, eperIsoRed, nRead, prnu, showMotion);
if(redDiff > 0.f) {
#ifdef PIXELSHIFTDEV
@@ -985,7 +984,7 @@ void RawImageSource::pixelshift(int winx, int winy, int winw, int winh, const RA
float blueCentre = psBlue[ i ][ j ];
float blueRight = psBlue[ i ][j + 1];
float blueBottom = psBlue[i + 1][ j ];
float blueDiff = nonGreenDiffCross(blueRight, blueLeft, blueTop, blueBottom, blueCentre, stddevFactorBlue, eperIsoBlue, nRead, prnu, showMotion);
float blueDiff = nonGreenDiffCross(blueRight, blueLeft, blueTop, blueBottom, blueCentre, clippedBlue, stddevFactorBlue, eperIsoBlue, nRead, prnu, showMotion);
if(blueDiff > 0.f) {
#ifdef PIXELSHIFTDEV