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Use PCL:AstrometricSolution properties to construct WCS

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This commit is contained in:
Dušan Poizl
2025-07-26 15:48:58 +02:00
parent e0441a6494
commit af1c26a9fe
1 changed files with 43 additions and 2 deletions
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src/loadimage.cpp
+43 -2
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@@ -241,18 +241,59 @@ bool loadXISF(const QString &path, ImageInfoData &info, std::shared_ptr<RawImage
{
info.fitsHeader.append(fits);
}
QVector<FITSRecord> xisfWCS;
auto imageproperties = xisfImage.imageProperties();
for(auto prop : imageproperties)
{
info.fitsHeader.append(prop);
if(prop.id == "PCL:AstrometricSolution:ReferenceCelestialCoordinates" && prop.value.type() == LibXISF::Variant::Type::F64Vector)
{
auto val = prop.value.value<LibXISF::F64Vector>();
if(val.size() >= 2)
{
xisfWCS.append({"CRVAL1", val[0], "value from PCL:AstrometricSolution"});
xisfWCS.append({"CRVAL2", val[1], "value from PCL:AstrometricSolution"});
}
}
else if(prop.id == "PCL:AstrometricSolution:ReferenceImageCoordinates" && prop.value.type() == LibXISF::Variant::Type::F64Vector)
{
auto val = prop.value.value<LibXISF::F64Vector>();
if(val.size() >= 2)
{
xisfWCS.append({"CRPIX1", val[0], "value from PCL:AstrometricSolution"});
xisfWCS.append({"CRPIX2", val[1], "value from PCL:AstrometricSolution"});
}
}
else if(prop.id == "PCL:AstrometricSolution:LinearTransformationMatrix" && prop.value.type() == LibXISF::Variant::Type::F64Matrix)
{
auto val = prop.value.value<LibXISF::F64Matrix>();
if(val.cols() >= 2 && val.rows() >= 2)
{
xisfWCS.append({"CD1_1", val(0, 0), "value from PCL:AstrometricSolution"});
xisfWCS.append({"CD1_2", val(0, 1), "value from PCL:AstrometricSolution"});
xisfWCS.append({"CD2_1", val(1, 0), "value from PCL:AstrometricSolution"});
xisfWCS.append({"CD2_2", val(1, 1), "value from PCL:AstrometricSolution"});
}
}
else if(prop.id == "PCL:AstrometricSolution:ProjectionSystem")
{
if(prop.value.toString() == "Gnomonic")
{
xisfWCS.append({"CTYPE1", "RA---TAN", "value from PCL:AstrometricSolution"});
xisfWCS.append({"CTYPE", "DEC--TAN", "value from PCL:AstrometricSolution"});
}
}
}
info.num = xisf.imagesCount();
info.index = index;
info.wcs = std::make_shared<WCSDataT>(xisfImage.width(), xisfImage.height(), info.fitsHeader);
info.info.append({QObject::tr("Width"), QString::number(xisfImage.width())});
info.info.append({QObject::tr("Height"), QString::number(xisfImage.height())});
if(!info.wcs->valid())info.wcs.reset();
auto wcs = std::make_shared<WCSDataT>(xisfImage.width(), xisfImage.height(), info.fitsHeader);
if(!wcs->valid() && xisfWCS.size())wcs = std::make_shared<WCSDataT>(xisfImage.width(), xisfImage.height(), xisfWCS);
if(wcs->valid())info.wcs = wcs;
RawImage::DataType type;
switch(xisfImage.sampleFormat())