boofcv.factory.shape.FactoryShapeDetector Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of feature Show documentation
BoofCV is an open source Java library for real-time computer vision and robotics applications.
There is a newer version: 0.26
/*
 * Copyright (c) 2011-2016, Peter Abeles. All Rights Reserved.
 *
 * This file is part of BoofCV (http://boofcv.org).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package boofcv.factory.shape;

import boofcv.alg.shapes.polygon.BinaryPolygonDetector;
import boofcv.alg.shapes.polygon.RefineBinaryPolygon;
import boofcv.alg.shapes.polygon.RefinePolygonCornersToImage;
import boofcv.alg.shapes.polygon.RefinePolygonLineToImage;
import boofcv.alg.shapes.polyline.SplitMergeLineFitLoop;
import boofcv.struct.image.ImageGray;

/**
 * Factory for detecting higher level shapes
 *
 *
 * @author Peter Abeles
 */
public class FactoryShapeDetector {

	/**
	 * Creates a polygon detector.  The polygon is assumed to be a black shape with a much lighter background.
	 * The polygon can be found to sub-pixel accuracy, if configured to do so.
	 *
	 * @param config Configuration for polygon detector
	 * @param imageType Input image type
	 * @return Detector
	 */
	public static 
	BinaryPolygonDetector polygon( ConfigPolygonDetector config, Class imageType)
	{
		config.checkValidity();

		SplitMergeLineFitLoop contourToPolygon = new SplitMergeLineFitLoop(
				config.contour2Poly_splitFraction,
				config.contour2Poly_minimumSideFraction,
				config.contour2Poly_iterations);

		RefineBinaryPolygon refinePolygon = null;
		if( config.refine != null ) {
			if( config.refine instanceof ConfigRefinePolygonLineToImage ) {
				refinePolygon = refinePolygon((ConfigRefinePolygonLineToImage)config.refine,imageType);
			} else if( config.refine instanceof ConfigRefinePolygonCornersToImage ) {
				refinePolygon = refinePolygon((ConfigRefinePolygonCornersToImage)config.refine,imageType);
			} else {
				throw new IllegalArgumentException("Unknown refine config type");
			}
		}

		return new BinaryPolygonDetector(config.minimumSides,config.maximumSides,contourToPolygon,
				refinePolygon,config.minContourImageWidthFraction,
				config.clockwise,config.convex, config.canTouchBorder, config.splitPenalty,
				config.minimumEdgeIntensity,imageType);
	}

	public static 
	RefineBinaryPolygon refinePolygon( ConfigRefinePolygonLineToImage config , Class imageType ) {
		return new RefinePolygonLineToImage(
				config.cornerOffset, config.lineSamples,
				config.sampleRadius, config.maxIterations,
				config.convergeTolPixels, config.maxCornerChangePixel,
				imageType);
	}

	public static 
	RefineBinaryPolygon refinePolygon( ConfigRefinePolygonCornersToImage config , Class imageType ) {
		return new RefinePolygonCornersToImage(
				config.endPointDistance,
				config.cornerOffset, config.lineSamples,
				config.sampleRadius, config.maxIterations,
				config.convergeTolPixels, config.maxCornerChangePixel,
				imageType);
	}
}