/// <summary>
/// Set exif information.
/// </summary>
/// <param name="filePath">File path</param>
public void SetExif(string filePath)
{
Application.Current.Dispatcher.Invoke(() =>
{
ExifDataList.Clear();
ExifDataList.AddRange(ExifParser.GetExifDataFromFile(filePath));
});
}
public static Position TryExtractPositionFromFile(string file)
{
Console.WriteLine(file);
IReadOnlyList <Directory> directories;
try
{
directories = ImageMetadataReader.ReadMetadata(file);
}
catch (ImageProcessingException)
{
Console.WriteLine("Unable to process {0}", file);
return(null);
}
if (!directories.Any())
{
return(null);
}
var latitude = directories.SelectMany(x => x.Tags).FirstOrDefault(t => t.Name == "GPS Latitude");
var longitude = directories.SelectMany(x => x.Tags).FirstOrDefault(t => t.Name == "GPS Longitude");
var date = directories.SelectMany(x => x.Tags).FirstOrDefault(t => t.Name == "GPS Date Stamp");
var time = directories.SelectMany(x => x.Tags).FirstOrDefault(t => t.Name == "GPS Time-Stamp");
var dilutionOfPrecision = directories.SelectMany(x => x.Tags).Where(t => t.Name.StartsWith("GPS DOP")).FirstOrDefault();
// sometimes DOP is represented as rational value (numerator, denominator), sometimes as double.
if (latitude != null && longitude != null && date != null && time != null)
{
var dateTime = $"{date.Description} {time.Description}";
Console.WriteLine(dateTime);
Console.WriteLine(gpsFormat);
var dateTimeUtc = DateTimeOffset.ParseExact(dateTime, gpsFormat, null, System.Globalization.DateTimeStyles.AssumeUniversal);
Console.WriteLine("[{0}]: {1}, {2}", dateTimeUtc, latitude.Description, longitude.Description);
return(new Position(dateTimeUtc,
LatLongParser.ParseString(latitude.Description),
LatLongParser.ParseString(longitude.Description),
dilutionOfPrecision == null ? 0.0 : ExifParser.ParseRationalOrDouble(dilutionOfPrecision.Description)));
}
if (latitude != null && longitude != null)
{
var filesystemTime = directories.SelectMany(x => x.Tags).FirstOrDefault(t => t.Name == "File Modified Date");
if (filesystemTime != null)
{
var dateTime = DateTimeOffset.ParseExact(filesystemTime.Description, fileModifiedDateFormat, CultureInfo.InvariantCulture);
Console.WriteLine("[{0}]: {1}, {2}", dateTime, latitude.Description, longitude.Description);
return(new Position(dateTime, LatLongParser.ParseString(latitude.Description), LatLongParser.ParseString(longitude.Description), PositionUnit.WGS84));
}
}
return(null);
}
public async Task <IEnumerable <Tag> > GetTagsAsync(string srcPath)
{
VerifySourceFile(srcPath);
var reader = new ExifReader(_opts);
var parser = new ExifParser();
var exifJson = await reader.ReadExifAsync(srcPath).ConfigureAwait(false);
return(parser.ParseTags(exifJson));
}
public async Task <IEnumerable <Tag> > GetTagsAsync(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
var reader = new ExifReader(_opts);
var parser = new ExifParser();
var exifJson = await reader.ReadExifAsync(stream).ConfigureAwait(false);
return(parser.ParseTags(exifJson));
}
private static Surface GetOrientedSurface(byte[] bytes, out ExifValueCollection exifMetadata)
{
exifMetadata = null;
Surface surface = WebPFile.Load(bytes);
byte[] exifBytes = WebPFile.GetExifBytes(bytes);
if (exifBytes != null)
{
exifMetadata = ExifParser.Parse(exifBytes);
if (exifMetadata != null)
{
ExifValue orientationProperty = exifMetadata.GetAndRemoveValue(ExifPropertyKeys.Image.Orientation.Path);
if (orientationProperty != null)
{
MetadataHelpers.ApplyOrientationTransform(orientationProperty, ref surface);
}
}
}
return(surface);
}
private static Document GetOrientedDocument(byte[] bytes, out ExifValueCollection exifMetadata)
{
exifMetadata = null;
Document doc = null;
// Load the image into a Bitmap so the EXIF orientation transform can be applied.
using (Bitmap image = WebPFile.Load(bytes))
{
byte[] exifBytes = WebPFile.GetExifBytes(bytes);
if (exifBytes != null)
{
exifMetadata = ExifParser.Parse(exifBytes);
if (exifMetadata.Count > 0)
{
MetadataEntry orientationProperty = exifMetadata.GetAndRemoveValue(MetadataKeys.Image.Orientation);
if (orientationProperty != null)
{
RotateFlipType transform = MetadataHelpers.GetOrientationTransform(orientationProperty);
if (transform != RotateFlipType.RotateNoneFlipNone)
{
image.RotateFlip(transform);
}
}
MetadataEntry xResProperty = exifMetadata.GetAndRemoveValue(MetadataKeys.Image.XResolution);
MetadataEntry yResProperty = exifMetadata.GetAndRemoveValue(MetadataKeys.Image.YResolution);
MetadataEntry resUnitProperty = exifMetadata.GetAndRemoveValue(MetadataKeys.Image.ResolutionUnit);
if (xResProperty != null && yResProperty != null && resUnitProperty != null)
{
if (MetadataHelpers.TryDecodeRational(xResProperty, out double xRes) &&
MetadataHelpers.TryDecodeRational(yResProperty, out double yRes) &&
MetadataHelpers.TryDecodeShort(resUnitProperty, out ushort resUnit))
{
if (xRes > 0.0 && yRes > 0.0)
{
double dpiX, dpiY;
switch ((MeasurementUnit)resUnit)
{
case MeasurementUnit.Centimeter:
dpiX = Document.DotsPerCmToDotsPerInch(xRes);
dpiY = Document.DotsPerCmToDotsPerInch(yRes);
break;
case MeasurementUnit.Inch:
dpiX = xRes;
dpiY = yRes;
break;
default:
// Unknown ResolutionUnit value.
dpiX = 0.0;
dpiY = 0.0;
break;
}
if (dpiX > 0.0 && dpiY > 0.0)
{
try
{
image.SetResolution((float)dpiX, (float)dpiY);
}
catch
{
// Ignore any errors when setting the resolution.
}
}
}
}
}
}
}
doc = Document.FromGdipImage(image);
}
return(doc);
}
private static void AddAvifMetadataToDocument(Document doc, AvifReader reader, IByteArrayPool arrayPool)
{
byte[] exifBytes = reader.GetExifData();
if (exifBytes != null)
{
ExifValueCollection exifValues = ExifParser.Parse(exifBytes, arrayPool);
if (exifValues != null)
{
exifValues.Remove(MetadataKeys.Image.InterColorProfile);
// The HEIF specification states that the EXIF orientation tag is only
// informational and should not be used to rotate the image.
// See https://github.com/strukturag/libheif/issues/227#issuecomment-642165942
exifValues.Remove(MetadataKeys.Image.Orientation);
foreach (MetadataEntry entry in exifValues)
{
doc.Metadata.AddExifPropertyItem(entry.CreateExifPropertyItem());
}
}
}
CICPColorData?imageColorData = reader.ImageColorData;
if (imageColorData.HasValue)
{
string serializedValue = CICPSerializer.TrySerialize(imageColorData.Value);
if (serializedValue != null)
{
doc.Metadata.SetUserValue(CICPMetadataName, serializedValue);
}
}
ImageGridMetadata imageGridMetadata = reader.ImageGridMetadata;
if (imageGridMetadata != null)
{
string serializedValue = imageGridMetadata.SerializeToString();
if (serializedValue != null)
{
doc.Metadata.SetUserValue(ImageGridName, serializedValue);
}
}
byte[] iccProfileBytes = reader.GetICCProfile();
if (iccProfileBytes != null)
{
doc.Metadata.AddExifPropertyItem(ExifSection.Image,
unchecked ((ushort)ExifTagID.IccProfileData),
new ExifValue(ExifValueType.Undefined,
iccProfileBytes));
}
byte[] xmpBytes = reader.GetXmpData();
if (xmpBytes != null)
{
XmpPacket xmpPacket = XmpPacket.TryParse(xmpBytes);
if (xmpPacket != null)
{
doc.Metadata.SetXmpPacket(xmpPacket);
}
}
}
/// <summary>
/// Exif情報を設定する
/// </summary>
/// <param name="filePath">画像ファイルパス</param>
public void SetExif(string filePath)
{
ExifParser.SetExifDataFromFile(filePath, ExifDataList);
}
/// <summary>
/// コンストラクタ
/// </summary>
public ExifInfoViewModel()
{
// Exif情報の基礎部分を作っておく。
// 各Exif情報の値は、画像読み込み時に設定する
ExifParser.CreateExifDefaultList(ExifDataList);
}
protected ExifImageInfoMediaTransformerBase()
{
_exifParser = new ExifParser();
}
public void TestParseDouble()
{
Assertions.AreApproximatelyEqual(3.946, ExifParser.ParseRationalOrDouble("3.946"));
}
