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Auto-fill to reduce image to fit with LCP pincussion distortions

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see issue 1415
This commit is contained in:
Oliver Duis
2012-06-15 07:40:19 +02:00
parent c24f37258f
commit 1643fe84f9
1 changed files with 15 additions and 12 deletions
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27
rtengine/iptransform.cc
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@@ -36,18 +36,17 @@ namespace rtengine {
bool ImProcFunctions::transCoord (int W, int H, const std::vector<Coord2D> &src, std::vector<Coord2D> &red, std::vector<Coord2D> &green, std::vector<Coord2D> &blue, double ascaleDef,
const LCPMapper *pLCPMap) {
bool clipresize = true, clipped = false;
bool clipped = false;
red.clear (); green.clear (); blue.clear ();
if (!needsCA() && !needsDistortion() && !needsRotation() && !needsPerspective() && (!params->lensProf.useDist || pLCPMap==NULL)) {
if (clipresize) {
for (size_t i=0; i<src.size(); i++) {
red.push_back (Coord2D (src[i].x, src[i].y));
green.push_back (Coord2D (src[i].x, src[i].y));
blue.push_back (Coord2D (src[i].x, src[i].y));
}
}
return clipped;
}
@@ -113,7 +112,7 @@ bool ImProcFunctions::transCoord (int W, int H, const std::vector<Coord2D> &src,
blue.push_back (Coord2D(Dx*(s+params->cacorrection.blue)+w2, Dy*(s+params->cacorrection.blue)+h2));
}
if (clipresize) {
// Clip all points and track if they were any corrections
for (size_t i=0; i<src.size(); i++) {
red[i].x = CLIPTOC(red[i].x,0,W-1,clipped);
red[i].y = CLIPTOC(red[i].y,0,H-1,clipped);
@@ -122,12 +121,13 @@ bool ImProcFunctions::transCoord (int W, int H, const std::vector<Coord2D> &src,
blue[i].x = CLIPTOC(blue[i].x,0,W-1,clipped);
blue[i].y = CLIPTOC(blue[i].y,0,H-1,clipped);
}
}
return clipped;
}
// Transform all corners and critical sidelines of an image
bool ImProcFunctions::transCoord (int W, int H, int x, int y, int w, int h, int& xv, int& yv, int& wv, int& hv, double ascaleDef, const LCPMapper *pLCPMap) {
const int DivisionsPerBorder=32;
int x1 = x, y1 = y;
int x2 = x1 + w - 1;
@@ -145,13 +145,13 @@ bool ImProcFunctions::transCoord (int W, int H, int x, int y, int w, int h, int&
corners[7].set (x2, (y1+y2)/2);
// Add several steps inbetween
int xstep = (x2-x1)/32;
int xstep = (x2-x1)/DivisionsPerBorder;
if (xstep<1) xstep = 1;
for (int i=x1+xstep; i<=x2-xstep; i+=xstep) {
corners.push_back (Coord2D (i, y1));
corners.push_back (Coord2D (i, y2));
}
int ystep = (y2-y1)/32;
int ystep = (y2-y1)/DivisionsPerBorder;
if (ystep<1) ystep = 1;
for (int i=y1+ystep; i<=y2-ystep; i+=ystep) {
corners.push_back (Coord2D (x1, i));
@@ -543,11 +543,13 @@ void ImProcFunctions::transformPreview (Imagefloat* original, Imagefloat* transf
}
double ImProcFunctions::getTransformAutoFill (int oW, int oH, const LCPMapper *pLCPMap) {
if (!needsCA() && !needsDistortion() && !needsRotation() && !needsPerspective() && (!params->lensProf.useDist || pLCPMap==NULL))
return 1;
double scaleU = 1.0;
double scaleL = 0.001;
while (scaleU - scaleL > 0.001) {
double scale = (scaleU + scaleL) / 2.0;
double scaleU = 2, scaleL = 0.001; // upper and lower border, iterate inbetween
do {
double scale = (scaleU + scaleL) * 0.5;
int orx, ory, orw, orh;
bool clipped = transCoord (oW, oH, 0, 0, oW, oH, orx, ory, orw, orh, scale, pLCPMap);
@@ -556,7 +558,8 @@ double ImProcFunctions::getTransformAutoFill (int oW, int oH, const LCPMapper *p
scaleU = scale;
else
scaleL = scale;
}
} while (scaleU - scaleL > 0.001);
return scaleL;
}