Examples with ConfigSiftDescribe boofcv.abst.feature.describe.ConfigSiftDescribe used on opensource projects

Example 1 with ConfigSiftDescribe

use of boofcv.abst.feature.describe.ConfigSiftDescribe in project BoofCV by lessthanoptimal.

the class FactoryDescribeImageDense method sift.

/**
 * Creates a dense SIFT descriptor.
 *
 * @see DescribeDenseSiftAlg
 *
 * @param config Configuration for SIFT descriptor. null for defaults.
 * @param imageType Type of input image
 * @return Dense SIFT
 */
public static <T extends ImageGray<T>> DescribeImageDense<T, TupleDesc_F64> sift(@Nullable ConfigDenseSift config, Class<T> imageType) {
    if (config == null)
        config = new ConfigDenseSift();
    config.checkValidity();
    ConfigSiftDescribe c = config.sift;
    Class derivType = GImageDerivativeOps.getDerivativeType(imageType);
    DescribeDenseSiftAlg alg = new DescribeDenseSiftAlg(c.widthSubregion, c.widthGrid, c.numHistogramBins, c.weightingSigmaFraction, c.maxDescriptorElementValue, 1, 1, derivType);
    return new DescribeImageDenseSift(alg, config.sampling.periodX, config.sampling.periodY, imageType);
}

Example 2 with ConfigSiftDescribe

use of boofcv.abst.feature.describe.ConfigSiftDescribe in project BoofCV by lessthanoptimal.

the class FactoryDetectDescribe method sift.

/**
 * Creates a new SIFT feature detector and describer.
 *
 * @see CompleteSift
 *
 * @param config Configuration for the SIFT detector and descriptor.
 * @return SIFT
 */
public static <T extends ImageGray<T>> DetectDescribePoint<T, BrightFeature> sift(@Nullable ConfigCompleteSift config) {
    if (config == null)
        config = new ConfigCompleteSift();
    ConfigSiftScaleSpace configSS = config.scaleSpace;
    ConfigSiftDetector configDetector = config.detector;
    ConfigSiftOrientation configOri = config.orientation;
    ConfigSiftDescribe configDesc = config.describe;
    SiftScaleSpace scaleSpace = new SiftScaleSpace(configSS.firstOctave, configSS.lastOctave, configSS.numScales, configSS.sigma0);
    OrientationHistogramSift<GrayF32> orientation = new OrientationHistogramSift<>(configOri.histogramSize, configOri.sigmaEnlarge, GrayF32.class);
    DescribePointSift<GrayF32> describe = new DescribePointSift<>(configDesc.widthSubregion, configDesc.widthGrid, configDesc.numHistogramBins, configDesc.sigmaToPixels, configDesc.weightingSigmaFraction, configDesc.maxDescriptorElementValue, GrayF32.class);
    NonMaxSuppression nns = FactoryFeatureExtractor.nonmax(configDetector.extract);
    NonMaxLimiter nonMax = new NonMaxLimiter(nns, configDetector.maxFeaturesPerScale);
    CompleteSift dds = new CompleteSift(scaleSpace, configDetector.edgeR, nonMax, orientation, describe);
    return new DetectDescribe_CompleteSift<>(dds);
}