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Improved LCP error correction

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see issue 1408
This commit is contained in:
Oliver Duis
2012-06-12 22:48:34 +02:00
parent 639042ab56
commit fa39d8bf2a
2 changed files with 55 additions and 17 deletions
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67
rtengine/lcp.cc
View File

@@ -235,7 +235,7 @@ LCPProfile::LCPProfile(Glib::ustring fname) {
isFisheye=inCamProfiles=firstLIDone=inPerspect=inAlternateLensID=false;
sensorFormatFactor=1;
for (int i=0;i<2000;i++) aPersModel[i]=NULL;
for (int i=0;i<MaxPersModelCount;i++) aPersModel[i]=NULL;
persModelCount=0;
FILE *pFile = safe_g_fopen(fname, "rb");
@@ -252,10 +252,20 @@ LCPProfile::LCPProfile(Glib::ustring fname) {
XML_ParserFree(parser);
//printf("Parsing %s\n", fname.c_str());
// Two phase filter: first filter out the very rough ones, that distord the average a lot
// force it, even if there are few frames (community profiles)
filterBadFrames(2.0, 0);
// from the non-distorded, filter again on new average basis, but only if there are enough frames left
filterBadFrames(1.5, 100);
}
// from all frames not marked as bad already, take average and filter out frames with higher deviation than this if there are enough values
int LCPProfile::filterBadFrames(double maxAvgDevFac, int minFramesLeft) {
// take average error per type, then calculated the maximum deviation allowed
double errBase=0, errChrom=0, errVignette=0;
int baseCount=0, chromCount=0, vignetteCount=0;
for (int pm=0;pm<2000 && aPersModel[pm];pm++) {
for (int pm=0;pm<MaxPersModelCount && aPersModel[pm];pm++) {
if (aPersModel[pm]->hasModeData(0)) {
errVignette+=aPersModel[pm]->vignette.meanErr;
vignetteCount++;
@@ -273,35 +283,37 @@ LCPProfile::LCPProfile(Glib::ustring fname) {
}
// Only if we have enough frames, filter out errors
if (baseCount+chromCount+vignetteCount>=100) {
int filtered=0;
if (baseCount+chromCount+vignetteCount>=minFramesLeft) {
if (baseCount>0) errBase/=(double)baseCount;
if (chromCount>0) errChrom/=(double)chromCount;
if (vignetteCount>0) errVignette/=(double)vignetteCount;
// Now mark all the bad ones as bad, and hasModeData will return false;
const double MaxDeviation=2;
int filtered=0;
for (int pm=0;pm<2000 && aPersModel[pm];pm++) {
if (aPersModel[pm]->hasModeData(0) && aPersModel[pm]->vignette.meanErr > MaxDeviation * errVignette) {
for (int pm=0;pm<MaxPersModelCount && aPersModel[pm];pm++) {
if (aPersModel[pm]->hasModeData(0) && aPersModel[pm]->vignette.meanErr > maxAvgDevFac * errVignette) {
aPersModel[pm]->vignette.badErr=true;
filtered++;
}
if (aPersModel[pm]->hasModeData(1) && aPersModel[pm]->base.meanErr > MaxDeviation * errBase) {
if (aPersModel[pm]->hasModeData(1) && aPersModel[pm]->base.meanErr > maxAvgDevFac * errBase) {
aPersModel[pm]->base.badErr=true;
filtered++;
}
if (aPersModel[pm]->hasModeData(2) &&
(aPersModel[pm]->chromRG.meanErr > MaxDeviation * errChrom || aPersModel[pm]->chromG.meanErr > MaxDeviation * errChrom || aPersModel[pm]->chromBG.meanErr > MaxDeviation * errChrom)) {
(aPersModel[pm]->chromRG.meanErr > maxAvgDevFac * errChrom || aPersModel[pm]->chromG.meanErr > maxAvgDevFac * errChrom
|| aPersModel[pm]->chromBG.meanErr > maxAvgDevFac * errChrom)) {
aPersModel[pm]->chromRG.badErr=aPersModel[pm]->chromG.badErr=aPersModel[pm]->chromBG.badErr=true;
filtered++;
}
}
//printf("Filtered %i frames from %i profile %s\n", filtered, baseCount+chromCount+vignetteCount, fname.c_str());
//printf("Filtered %.1f%% frames for maxAvgDevFac %g leaving %i\n", filtered*100./(baseCount+chromCount+vignetteCount), maxAvgDevFac, baseCount+chromCount+vignetteCount-filtered);
}
return filtered;
}
@@ -333,7 +345,7 @@ void LCPProfile::calcParams(int mode, float focalLength, float focusDist, float
pLow=pHigh;
else if (!pHigh)
pHigh=pLow;
else if (mode==0 || focusDist>0) {
else {
// Pass 2: We have some, so take the best aperture for vignette and best focus for CA and distortion
// there are usually several frame per focal length. In the end pLow will have both flen and apterure/focdis below the target,
// and vice versa pHigh
@@ -342,29 +354,52 @@ void LCPProfile::calcParams(int mode, float focalLength, float focusDist, float
for (int pm=0;pm<persModelCount;pm++) {
float aper=aPersModel[pm]->aperture; // float aperLog=log(aper);
float focDist=aPersModel[pm]->focDist; float focDistLog=log(focDist)+euler;
double meanErr;
if (aPersModel[pm]->hasModeData(mode)) {
if (mode==0) {
// by aperture, and max out focus distance
meanErr=aPersModel[pm]->vignette.meanErr;
// by aperture (vignette), and max out focus distance
// tests showed doing this by log(aperture) is not as advisable
if (aPersModel[pm]->focLen==bestFocLenLow && ((aper>=aperture && aper<pLow->aperture && pLow->aperture > aperture)
if (aPersModel[pm]->focLen==bestFocLenLow && (
(aper==aperture && pLow->vignette.meanErr>meanErr)
|| (aper>=aperture && aper<pLow->aperture && pLow->aperture > aperture)
|| (aper<=aperture && (pLow->aperture>aperture || fabs(aperture-aper)<fabs(aperture - pLow->aperture))))) {
pLow=aPersModel[pm];
}
if (aPersModel[pm]->focLen==bestFocLenHigh && ((aper<=aperture && aper>pHigh->aperture && pHigh->aperture < aperture)
if (aPersModel[pm]->focLen==bestFocLenHigh && (
(aper==aperture && pHigh->vignette.meanErr>meanErr)
|| (aper<=aperture && aper>pHigh->aperture && pHigh->aperture < aperture)
|| (aper>=aperture && (pHigh->aperture<aperture || fabs(aperture-aper)<fabs(aperture - pHigh->aperture))))) {
pHigh=aPersModel[pm];
}
} else {
meanErr = (mode==1 ? aPersModel[pm]->base.meanErr : aPersModel[pm]->chromG.meanErr);
if (focusDist>0) {
// by focus distance
if (aPersModel[pm]->focLen==bestFocLenLow && ((focDist>=focusDist && focDist<pLow->focDist && pLow->focDist > focusDist)
if (aPersModel[pm]->focLen==bestFocLenLow && (
(focDist==focusDist && (mode==1 ? pLow->base.meanErr : pLow->chromG.meanErr)>meanErr)
|| (focDist>=focusDist && focDist<pLow->focDist && pLow->focDist > focusDist)
|| (focDist<=focusDist && (pLow->focDist>focusDist || fabs(focusDistLog-focDistLog)<fabs(focusDistLog - (log(pLow->focDist)+euler)))))) {
pLow=aPersModel[pm];
}
if (aPersModel[pm]->focLen==bestFocLenHigh && ((focDist<=focusDist && focDist>pHigh->focDist && pHigh->focDist < focusDist)
if (aPersModel[pm]->focLen==bestFocLenHigh && (
(focDist==focusDist && (mode==1 ? pHigh->base.meanErr : pHigh->chromG.meanErr)>meanErr)
|| (focDist<=focusDist && focDist>pHigh->focDist && pHigh->focDist < focusDist)
|| (focDist>=focusDist && (pHigh->focDist<focusDist || fabs(focusDistLog-focDistLog)<fabs(focusDistLog - (log(pHigh->focDist)+euler)))))) {
pHigh=aPersModel[pm];
}
} else {
// no focus distance available, just error
if (aPersModel[pm]->focLen==bestFocLenLow && (mode==1 ? pLow->base.meanErr : pLow->chromG.meanErr)>meanErr) {
pLow=aPersModel[pm];
}
if (aPersModel[pm]->focLen==bestFocLenHigh && (mode==1 ? pHigh->base.meanErr : pHigh->chromG.meanErr)>meanErr) {
pHigh=aPersModel[pm];
}
}
}
}
}

5
rtengine/lcp.h
View File

@@ -71,6 +71,8 @@ namespace rtengine {
static void XMLCALL XmlTextHandler (void *pLCPProfile, const XML_Char *s, int len);
static void XMLCALL XmlEndHandler (void *pLCPProfile, const char *el);
int filterBadFrames(double maxAvgDevFac, int minFramesLeft);
public:
// Common data
Glib::ustring profileName, lensPrettyName, cameraPrettyName, lens, camera; // lens/camera(=model) can be auto-matched with DNG
@@ -79,7 +81,8 @@ namespace rtengine {
int persModelCount;
// The correction frames
LCPPersModel* aPersModel[2000]; // Do NOT use std::list or something, it's buggy in GCC!
static const int MaxPersModelCount=3000;
LCPPersModel* aPersModel[MaxPersModelCount]; // Do NOT use std::list or something, it's buggy in GCC!
LCPProfile(Glib::ustring fname);