private List <Minutia> Extract(string fingerprintLabel, ResourceRepository repository)
{
Bitmap image = imageProvider.GetResource(fingerprintLabel, repository);
if (image == null)
{
throw new ArgumentOutOfRangeException(fingerprintLabel, "Unable to extract minutia list: Invalid fingerprint!");
}
if (MinutiaListExtractor == null)
{
throw new InvalidOperationException("Unable to extract minutia list: Unassigned minutia list extractor!");
}
return(MinutiaListExtractor.ExtractFeatures(image));
}
private SkeletonImage Extract(string fingerprintLabel, ResourceRepository repository)
{
Bitmap image = imageProvider.GetResource(fingerprintLabel, repository);
if (image == null)
{
throw new ArgumentOutOfRangeException("fingerprintLabel", "Unable to extract SkeletonImage: Invalid fingerprint!");
}
if (SkeletonImageExtractor == null)
{
throw new InvalidOperationException("Unable to extract SkeletonImage: Unassigned skeleton image extractor!");
}
return(SkeletonImageExtractor.ExtractFeatures(image));
}
/// <summary>
/// Gets the fingerprint image from the specified <see cref="ResourceRepository"/>.
/// </summary>
/// <param name="fingerprint">The fingerprint which image is being retrieved.</param>
/// <param name="repository">The object used to store and retrieve resources.</param>
/// <returns>The retrieved fingerprint image.</returns>
public Bitmap GetResource(string fingerprint, ResourceRepository repository)
{
byte[] rawImage = null;
foreach (string ext in new[] { "tif", "bmp", "jpg" })
{
string resourceName = string.Format("{0}.{1}", fingerprint, ext);
rawImage = repository.RetrieveResource(resourceName);
if (rawImage != null)
{
break;
}
}
if (rawImage == null)
{
return(null);
}
Bitmap srcBitmap = Image.FromStream(new MemoryStream(rawImage)) as Bitmap;
if (srcBitmap == null)
{
return(null);
}
Bitmap returnBitmap;
using (srcBitmap)
{
PixelFormat pixelFormat;
switch (srcBitmap.PixelFormat)
{
case PixelFormat.Format8bppIndexed:
case PixelFormat.Indexed:
case PixelFormat.Format4bppIndexed:
case PixelFormat.Format1bppIndexed:
pixelFormat = PixelFormat.Format24bppRgb;
break;
default:
pixelFormat = srcBitmap.PixelFormat;
break;
}
returnBitmap = new Bitmap(srcBitmap.Width, srcBitmap.Height, pixelFormat);
returnBitmap.SetResolution(srcBitmap.HorizontalResolution, srcBitmap.VerticalResolution);
Graphics g = Graphics.FromImage(returnBitmap);
g.DrawImage(srcBitmap, 0, 0);
}
return(returnBitmap);
}
/// <summary>
/// Gets minutia list from the specified fingerprint and <see cref="ResourceRepository"/>.
/// </summary>
/// <param name="fingerprint">The fingerprint which minutia list is being retrieved.</param>
/// <param name="repository">The object used to store and retrieve resources.</param>
/// <exception cref="ArgumentOutOfRangeException">Thrown when the fingerprint is invalid.</exception>
/// <exception cref="InvalidOperationException">Thrown when the minutia list extractor is not assigned.</exception>
/// <returns>The retrieved minutia list.</returns>
public List <Minutia> GetResource(string fingerprint, ResourceRepository repository)
{
bool isPersistent = IsResourcePersistent();
string resourceName =
string.Format("{0}.{1}", fingerprint, GetSignature());
if (isPersistent && repository.ResourceExists(resourceName))
{
return(MinutiaListSerializer.FromByteArray(repository.RetrieveResource(resourceName)));
}
List <Minutia> resource = Extract(fingerprint, repository);
if (resource == null)
{
return(null);
}
if (isPersistent)
{
repository.StoreResource(resourceName, MinutiaListSerializer.ToByteArray(resource));
}
return(resource);
}
/// <summary>
/// Gets minutia list from the specified fingerprint and <see cref="ResourceRepository"/>.
/// </summary>
/// <param name="fingerprint">The fingerprint which minutia list is being retrieved.</param>
/// <param name="repository">The object used to store and retrieve resources.</param>
/// <exception cref="ArgumentOutOfRangeException">Thrown when the fingerprint is invalid.</exception>
/// <exception cref="InvalidOperationException">Thrown when the minutia list extractor is not assigned.</exception>
/// <returns>The retrieved minutia list.</returns>
object IResourceProvider.GetResource(string fingerprint, ResourceRepository repository)
{
return(GetResource(fingerprint, repository));
}