private static double GetAperture(Directory exifItem)
{
var apertureString = exifItem.Tags.FirstOrDefault(p =>
p.DirectoryName == "Exif SubIFD" && p.Name == "Aperture Value")?.Description;
if (string.IsNullOrEmpty(apertureString))
{
apertureString = exifItem.Tags.FirstOrDefault(p =>
p.DirectoryName == "Exif SubIFD" && p.Name == "F-Number")?.Description;
}
// XMP,http://ns.adobe.com/exif/1.0/,exif:FNumber,9/1
var fNumberXmp = GetXmpData(exifItem, "exif:FNumber");
if (string.IsNullOrEmpty(apertureString) && !string.IsNullOrEmpty(fNumberXmp))
{
return(MathFraction.Fraction(fNumberXmp));
}
if (apertureString == null)
{
return(0d);
}
apertureString = apertureString.Replace("f/", string.Empty);
// Note: apertureString: (Dutch) 2,2 or (English) 2.2 based CultureInfo.CurrentCulture
float.TryParse(apertureString, NumberStyles.Number, CultureInfo.CurrentCulture, out var aperture);
return(aperture);
}
/// <summary>
/// [Exif SubIFD] Focal Length
/// </summary>
/// <returns></returns>
private static double GetFocalLength(Directory exifItem)
{
var focalLengthString = exifItem.Tags.FirstOrDefault(
p => p.DirectoryName == "Exif SubIFD" &&
p.Name == "Focal Length")?.Description;
// XMP,http://ns.adobe.com/exif/1.0/,exif:FocalLength,11/1
var focalLengthXmp = GetXmpData(exifItem, "exif:FocalLength");
if (string.IsNullOrEmpty(focalLengthString) && !string.IsNullOrEmpty(focalLengthXmp))
{
return(Math.Round(MathFraction.Fraction(focalLengthXmp), 5));
}
if (string.IsNullOrWhiteSpace(focalLengthString))
{
return(0d);
}
focalLengthString = focalLengthString.Replace(" mm", string.Empty);
// Note: focalLengthString: (Dutch) 2,2 or (English) 2.2 based CultureInfo.CurrentCulture
float.TryParse(focalLengthString, NumberStyles.Number, CultureInfo.CurrentCulture, out var focalLength);
return(Math.Round(focalLength, 5));
}
public void checkFractionSummPositive2()
{
Fraction fr1 = new Fraction(3, 22);
Fraction fr2 = new Fraction(5, 33);
Fraction frRes = MathFraction.sum(fr1, fr2);
Fraction frEx = new Fraction(19, 66);
Assert.AreEqual(frRes, frEx);
}
public void checkFractionSubt()
{
Fraction fr1 = new Fraction(3, 22);
Fraction fr2 = new Fraction(5, 33);
Fraction frRes = MathFraction.subt(fr1, fr2);
Fraction frEx = new Fraction(-1, 66);
Assert.AreEqual(frRes.Denominator, frEx.Denominator);
Assert.AreEqual(frRes.Numerator, frEx.Numerator);
Assert.AreEqual(frRes.Sign, frEx.Sign);
}
private static double GetXmpGeoAlt(List <Directory> allExifItems)
{
var altitudeRef = true;
var altitude = 0d;
// example:
// +1
// XMP,http://ns.adobe.com/exif/1.0/,exif:GPSAltitude,1/1
// XMP,http://ns.adobe.com/exif/1.0/,exif:GPSAltitudeRef,0
// -10
// XMP,http://ns.adobe.com/exif/1.0/,exif:GPSAltitude,10/1
// XMP,http://ns.adobe.com/exif/1.0/,exif:GPSAltitudeRef,1
foreach (var exifItem in allExifItems)
{
if (!(exifItem is XmpDirectory xmpDirectory) || xmpDirectory.XmpMeta == null)
{
continue;
}
foreach (var property in xmpDirectory.XmpMeta.Properties.Where(p =>
!string.IsNullOrEmpty(p.Value)))
{
switch (property.Path)
{
case "exif:GPSAltitude":
altitude = MathFraction.Fraction(property.Value);
break;
case "exif:GPSAltitudeRef":
altitudeRef = property.Value == "1";
break;
}
}
}
// no -0 as result
if (Math.Abs(altitude) < 0.001)
{
return(0);
}
if (altitudeRef)
{
altitude *= -1;
}
return(altitude);
}
private void GpsAltitudeRef(IXmpMeta xmp, FileIndexItem item)
{
string gpsAltitude = null;
string gpsAltitudeRef = null;
foreach (var property in xmp.Properties)
{
// Path=exif:GPSAltitude Namespace=http://ns.adobe.com/exif/1.0/ Value=627/10
// Path=exif:GPSAltitudeRef Namespace=http://ns.adobe.com/exif/1.0/ Value=0
var gpsAltitudeLocal = GetContentNameSpace(property, "exif:GPSAltitude");
if (gpsAltitudeLocal != null)
{
gpsAltitude = gpsAltitudeLocal;
}
var gpsAltitudeRefLocal = GetContentNameSpace(property, "exif:GPSAltitudeRef");
if (gpsAltitudeRefLocal != null)
{
gpsAltitudeRef = gpsAltitudeRefLocal;
}
}
if (gpsAltitude == null || gpsAltitudeRef == null)
{
return;
}
if (!gpsAltitude.Contains("/"))
{
return;
}
var locationAltitude = MathFraction.Fraction(gpsAltitude);
if (Math.Abs(locationAltitude) < 0)
{
return;
}
item.LocationAltitude = locationAltitude;
//For items under the sea level
if (gpsAltitudeRef == "1")
{
item.LocationAltitude = item.LocationAltitude * -1;
}
}
public void MathFraction_Fraction1()
{
var fraction = MathFraction.Fraction("1/1");
Assert.AreEqual(1, fraction, 0.00001);
}
public void MathFraction_FractionNotRight()
{
var fraction = MathFraction.Fraction("7/8/0");
Assert.AreEqual(0, fraction, 0.00001);
}
public void MathFraction_Fraction78()
{
var fraction = MathFraction.Fraction("7/8");
Assert.AreEqual(0.875, fraction, 0.00001);
}
/// <summary>
/// ContentNameSpace is for example : Namespace=http://...
/// </summary>
/// <param name="xmp"></param>
/// <param name="item"></param>
/// <returns></returns>
private FileIndexItem GetDataContentNameSpaceTypes(IXmpMeta xmp, FileIndexItem item)
{
GpsAltitudeRef(xmp, item);
foreach (var property in xmp.Properties)
{
// Path=exif:GPSLatitude Namespace=http://ns.adobe.com/exif/1.0/ Value=52,20.708N
var gpsLatitude = GetContentNameSpace(property, "exif:GPSLatitude");
if (gpsLatitude != null)
{
item.Latitude = GpsPreParseAndConvertDegreeAngleToDouble(gpsLatitude);
}
// Path=exif:GPSLongitude Namespace=http://ns.adobe.com/exif/1.0/ Value=5,55.840E
var gpsLongitude = GetContentNameSpace(property, "exif:GPSLongitude");
if (gpsLongitude != null)
{
item.Longitude = GpsPreParseAndConvertDegreeAngleToDouble(gpsLongitude);
}
// Option 1 (Datetime)
// Path=exif:DateTimeOriginal Namespace=http://ns.adobe.com/exif/1.0/ Value=2018-07-18T19:44:27
var dateTimeOriginal = GetContentNameSpace(property, "exif:DateTimeOriginal");
if (dateTimeOriginal != null)
{
DateTime.TryParseExact(dateTimeOriginal,
"yyyy-MM-dd\\THH:mm:ss",
CultureInfo.InvariantCulture,
DateTimeStyles.None,
out var dateTime);
if (dateTime.Year >= 3)
{
item.DateTime = dateTime;
}
}
// Option 2 (Datetime)
// Path=xmp:CreateDate Namespace=http://ns.adobe.com/xap/1.0/ Value=2019-03-02T11:29:18+01:00
// Path=xmp:CreateDate Namespace=http://ns.adobe.com/xap/1.0/ Value=2019-03-02T11:29:18
var createDate = GetContentNameSpace(property, "xmp:CreateDate");
if (createDate != null)
{
DateTime.TryParseExact(createDate,
"yyyy-MM-dd\\THH:mm:sszzz",
CultureInfo.InvariantCulture,
DateTimeStyles.None,
out var dateTime);
// The other option
if (dateTime.Year <= 3)
{
DateTime.TryParseExact(createDate,
"yyyy-MM-dd\\THH:mm:ss",
CultureInfo.InvariantCulture,
DateTimeStyles.None,
out dateTime);
}
// and use this value
item.DateTime = DateTime.SpecifyKind(dateTime, DateTimeKind.Unspecified);
}
// Path=photomechanic:ColorClass Namespace=http://ns.camerabits.com/photomechanic/1.0/ Value=1
var colorClass = GetContentNameSpace(property, "photomechanic:ColorClass");
if (colorClass != null)
{
item.ColorClass = ColorClassParser.GetColorClass(colorClass);
}
// Path=tiff:Orientation Namespace=http://ns.adobe.com/tiff/1.0/ Value=6
var rotation = GetContentNameSpace(property, "tiff:Orientation");
if (rotation != null)
{
item.SetAbsoluteOrientation(rotation);
}
// Path=tiff:ImageLength Namespace=http://ns.adobe.com/tiff/1.0/ Value=13656
var height = GetContentNameSpace(property, "tiff:ImageLength");
if (height != null)
{
item.SetImageHeight(height);
}
// Path=tiff:ImageWidth Namespace=http://ns.adobe.com/tiff/1.0/ Value=15504
var width = GetContentNameSpace(property, "tiff:ImageWidth");
if (width != null)
{
item.SetImageWidth(width);
}
// Path=photoshop:City Namespace=http://ns.adobe.com/photoshop/1.0/ Value=Epe
var locationCity = GetContentNameSpace(property, "photoshop:City");
if (locationCity != null)
{
item.LocationCity = locationCity;
}
// Path=photoshop:State Namespace=http://ns.adobe.com/photoshop/1.0/ Value=Gelderland
var locationState = GetContentNameSpace(property, "photoshop:State");
if (locationState != null)
{
item.LocationState = locationState;
}
// Path=photoshop:Country Namespace=http://ns.adobe.com/photoshop/1.0/ Value=Nederland
var locationCountry = GetContentNameSpace(property, "photoshop:Country");
if (locationCountry != null)
{
item.LocationCountry = locationCountry;
}
// exif:ExposureTime http://ns.adobe.com/exif/1.0/
var shutterSpeed = GetContentNameSpace(property, "exif:ExposureTime");
if (shutterSpeed != null)
{
item.ShutterSpeed = shutterSpeed;
}
// exif:FNumber http://ns.adobe.com/exif/1.0/
var aperture = GetContentNameSpace(property, "exif:FNumber");
if (aperture != null)
{
item.Aperture = MathFraction.Fraction(aperture);
}
// Path=tiff:Make Namespace=http://ns.adobe.com/tiff/1.0/ Value=SONY
var make = GetContentNameSpace(property, "tiff:Make");
if (make != null)
{
item.SetMakeModel(make, 0);
}
// Path=tiff:Model Namespace=http://ns.adobe.com/tiff/1.0/ Value=SLT-A58
var model = GetContentNameSpace(property, "tiff:Model");
if (model != null)
{
item.SetMakeModel(model, 1);
}
// Path=exif:FocalLength Namespace=http://ns.adobe.com/exif/1.0/ Value=200/1
// Path=exif:FocalLength Namespace=http://ns.adobe.com/exif/1.0/ Value=18/1
var focalLength = GetContentNameSpace(property, "exif:FocalLength");
if (focalLength != null)
{
item.FocalLength = MathFraction.Fraction(focalLength);
}
// Path=xmp:CreatorTool Namespace=http://ns.adobe.com/xap/1.0/ Value=SLT-A58 v1.00
var software = GetContentNameSpace(property, "xmp:CreatorTool");
if (software != null)
{
item.Software = software;
}
}
return(item);
}
