public void Index(DirectoryInfo folder)
{
var imagesOnDisk = FileHelper.GetImages(folder);
_images.Clear();
_imageGlobalColorDescriptors.Clear();
_imageLocalDescriptors.Clear();
foreach (var image in imagesOnDisk)
{
ColorHistogramPerRegionImageFeature colorFeature = new ColorHistogramPerRegionImageFeature();
SurfImageFeatures features = new SurfImageFeatures();
using (Image <Bgr, Byte> tempImage = new Image <Bgr, Byte>(image.FullName))
{
using (Image <Gray, Byte> tempGrayImage = tempImage.Convert <Gray, byte>())
{
colorFeature.Compute(tempImage);
features.Compute(tempGrayImage);
var imageItem = new ImageItem(image.Name, image.FullName, features.Descriptors, colorFeature.Descriptors);
if ((colorFeature.Descriptors != null) && (features.Descriptors != null))
{
_images.Add(imageItem);
_imageGlobalColorDescriptors.Add(colorFeature.Descriptors);
_imageLocalDescriptors.Add(features.Descriptors);
}
}
}
}
_localSimilarityEngine.Index(_imageLocalDescriptors);
_globalSimilarityEngine.Index(_imageGlobalColorDescriptors);
}
private List <KeyValuePair <ImageItem, float> > QueryUsingPHistogram(Image <Bgr, Byte> queryImage)
{
List <KeyValuePair <ImageItem, float> > results = new List <KeyValuePair <ImageItem, float> >();
ColorHistogramPerRegionImageFeature queryFeature = new ColorHistogramPerRegionImageFeature();
queryFeature.Compute(queryImage);
_globalSimilarityEngine.ComputeSimilarities(queryFeature.Descriptors);
float[] distances = _globalSimilarityEngine.Distances;
for (int index = 0; index < _imageGlobalColorDescriptors.Count; ++index)
{
if (distances[index] <= 10000.0f)
{
results.Add(new KeyValuePair <ImageItem, float>(_images.ImageItems[index], distances[index]));
}
}
results.Sort(delegate(KeyValuePair <ImageItem, float> first, KeyValuePair <ImageItem, float> second)
{
if (first.Value > second.Value)
{
return(1);
}
if (first.Value < second.Value)
{
return(-1);
}
return(0);
});
return(results);
}