public void testLocalExtract(ArrayList<String> images)
throws IOException, IllegalAccessException, InstantiationException {
LocalFeatureExtractor localFeatureExtractor = localFeatureClass.newInstance();
LocalDocumentBuilder localDocumentBuilder = new LocalDocumentBuilder();
AbstractAggregator aggregator = aggregatorClass.newInstance();
Cluster[] codebook32 = Cluster.readClusters(codebookPath + "CvSURF32");
Cluster[] codebook128 = Cluster.readClusters(codebookPath + "CvSURF128");
BufferedImage image;
double[] featureVector;
long ms, totalTime = 0;
for (String path : images) {
image = ImageIO.read(new FileInputStream(path));
ms = System.currentTimeMillis();
localDocumentBuilder.extractLocalFeatures(image, localFeatureExtractor);
aggregator.createVectorRepresentation(localFeatureExtractor.getFeatures(), codebook32);
ms = System.currentTimeMillis() - ms;
totalTime += ms;
featureVector = aggregator.getVectorRepresentation();
System.out.println(
String.format("%.2f", (double) ms)
+ " ms. ~ "
+ path.substring(path.lastIndexOf('\\') + 1)
+ " ~ "
+ Arrays.toString(featureVector));
}
System.out.println(
localFeatureExtractor.getClassOfFeatures().newInstance().getFeatureName()
+ " "
+ String.format("%.2f", totalTime / (double) images.size())
+ " ms each.");
System.out.println();
}
private Field[] getLocalDescriptorFields(
BufferedImage image, ExtractorItem extractorItem, LinkedList<Cluster[]> listOfCodebooks) {
LocalFeatureExtractor localFeatureExtractor =
extractLocalFeatures(image, (LocalFeatureExtractor) extractorItem.getExtractorInstance());
return createLocalDescriptorFields(
localFeatureExtractor.getFeatures(), extractorItem, listOfCodebooks);
}
public LocalFeatureExtractor extractLocalFeatures(
BufferedImage image, LocalFeatureExtractor localFeatureExtractor) {
assert (image != null);
// Scaling image is especially with the correlogram features very important!
// All images are scaled to guarantee a certain upper limit for indexing.
if (Math.max(image.getHeight(), image.getWidth()) > DocumentBuilder.MAX_IMAGE_DIMENSION) {
image = ImageUtils.scaleImage(image, DocumentBuilder.MAX_IMAGE_DIMENSION);
}
localFeatureExtractor.extract(image);
return localFeatureExtractor;
}