本文整理汇总了C++中exifdata::const_iterator::toFloat方法的典型用法代码示例。如果您正苦于以下问题：C++ const_iterator::toFloat方法的具体用法？C++ const_iterator::toFloat怎么用？C++ const_iterator::toFloat使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类exifdata::const_iterator的用法示例。
在下文中一共展示了const_iterator::toFloat方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: val
void Exiv2Lib::setWhiteBalanceCoeffsNikon(ExifData& data, float wb[3])
{
ExifData::const_iterator pos;
/*
* This seems to be unnecessary as the multipliers are also
* available as rational numbers in the WB_RBLevels tag
*/
/*
pos = data.findKey(ExifKey("Exif.Nikon3.Version"));
int makerNoteVersion = -1;
if (pos != data.end())
{
char* buf = new char[pos->size()];
pos->copy((unsigned char*)buf, littleEndian);
QString val(buf);
qDebug() << val;
delete [] buf;
makerNoteVersion = val.toInt();
}
qDebug() << "Nikon makenote version:" << makerNoteVersion;
if (makerNoteVersion >= 200)
{
qDebug() << "Decrypt Nikon Color Balance";
}
*/
pos = data.findKey(ExifKey("Exif.Nikon3.WB_RBLevels"));
if (pos != data.end())
{
if (*mExifInfo.model == "NIKON D300")
{
wb[0] = 1.0f;
wb[1] = 1.0f;
wb[2] = 1.0f;
// wb[0] = colorData->V3.WhiteBalanceTable[WB_AsShot].RGGB[0];
// wb[1] =
// ((colorData->V1.WhiteBalanceTable[WB_AsShot].RGGB[1] +
// colorData->V1.WhiteBalanceTable[WB_AsShot].RGGB[2]) / 2);
// wb[2] = colorData->V1.WhiteBalanceTable[WB_AsShot].RGGB[3];
qDebug() << "White balance for model Nikon D300";
if (pos != data.end())
{
wb[0] = pos->toFloat(0);
wb[1] = 1.0f;
wb[2] = pos->toFloat(1);
qDebug() << "Nikon: RGB" << wb[0] << "," << wb[1] << "," <<
wb[2];
}
}
float mx = max3(wb[0], wb[1], wb[2]);
wb[0] /= mx;
wb[1] /= mx;
wb[2] /= mx;
}
else
{
qDebug () << "Nikon: Color balance data not available";
wb[0] = 1.0f;
wb[1] = 1.0f;
wb[2] = 1.0f;
}
}示例2: if
gboolean
exiv2_load_meta_interface(const gchar *service, RAWFILE *rawfile, guint offset, RSMetadata *meta)
{
try {
Image::AutoPtr img = ImageFactory::open((byte*)raw_get_map(rawfile), raw_get_filesize(rawfile));
img->readMetadata();
ExifData &exifData = img->exifData();
#if EXIV2_TEST_VERSION(0,17,0)
/* We perfer XMP data, so copy it to EXIF */
XmpData &xmpData = img->xmpData();
if (!xmpData.empty())
copyXmpToExif(xmpData, exifData);
#endif
/* Parse Exif Data */
if (!exifData.empty())
{
ExifData::const_iterator i;
i = exifData.findKey(ExifKey("Exif.Image.Make"));
if (i != exifData.end())
set_metadata_maker(i->toString(), meta);
i = exifData.findKey(ExifKey("Exif.Image.Model"));
if (i != exifData.end())
meta->model_ascii = g_strdup(i->toString().c_str());
#if EXIV2_TEST_VERSION(0,19,0)
i = orientation(exifData);
if (i != exifData.end())
{
std::auto_ptr<Exiv2::Value> val = i->getValue();
if (val->count())
{
switch (val->toLong())
{
case 6: meta->orientation = 90;
break;
case 8: meta->orientation = 270;
break;
}
}
}
#endif
i = exifData.findKey(ExifKey("Exif.Image.DateTimeOriginal"));
if (i == exifData.end())
i = exifData.findKey(ExifKey("Exif.Image.DateTime"));
if (i != exifData.end())
{
meta->time_ascii = g_strdup(i->toString().c_str());
meta->timestamp = rs_exiftime_to_unixtime(meta->time_ascii);
}
i = exifData.findKey(ExifKey("Exif.Image.ExposureTime"));
if (i == exifData.end())
i = exifData.findKey(ExifKey("Exif.Photo.ExposureTime"));
if (i != exifData.end())
meta->shutterspeed = 1.0 / i->getValue()->toFloat();
else
{
i = exifData.findKey(ExifKey("Exif.Image.ShutterSpeedValue"));
if (i == exifData.end())
i = exifData.findKey(ExifKey("Exif.Photo.ShutterSpeedValue"));
if (i != exifData.end())
meta->shutterspeed = 1.0 / i->toFloat();
}
i = exifData.findKey(ExifKey("Exif.Image.FNumber"));
if (i == exifData.end())
i = exifData.findKey(ExifKey("Exif.Photo.FNumber"));
if (i == exifData.end())
i = exifData.findKey(ExifKey("Exif.Image.ApertureValue"));
if (i == exifData.end())
i = exifData.findKey(ExifKey("Exif.Photo.ApertureValue"));
if (i != exifData.end())
meta->aperture = i->toFloat();
i = exifData.findKey(ExifKey("Exif.Image.FocalLength"));
if (i == exifData.end())
i = exifData.findKey(ExifKey("Exif.Photo.FocalLength"));
if (i != exifData.end())
meta->focallength = i->toFloat()-0.01;
#if EXIV2_TEST_VERSION(0,19,0)
i = isoSpeed(exifData);
if (i != exifData.end())
meta->iso = i->toLong();
/* Text based Lens Identifier */
i = lensName(exifData);
if (i != exifData.end())
{
TypeId type = i->typeId();
if (type == unsignedShort || type == unsignedLong || type == signedShort || type == signedLong || type == unsignedByte || type == signedByte)
meta->lens_id = i->toLong();
else if (type == asciiString || type == string)
meta->fixed_lens_identifier = g_strdup(i->toString().c_str());
}
#endif
//.........这里部分代码省略.........