boofcv.factory.fiducial.ConfigAztecCode Maven / Gradle / Ivy
/*
* Copyright (c) 2022, 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.fiducial;
import boofcv.abst.shapes.polyline.ConfigPolylineSplitMerge;
import boofcv.factory.filter.binary.ConfigThreshold;
import boofcv.factory.filter.binary.ConfigThresholdLocalOtsu;
import boofcv.factory.filter.binary.ThresholdType;
import boofcv.factory.shape.ConfigPolygonDetector;
import boofcv.struct.ConfigLength;
import boofcv.struct.Configuration;
import boofcv.struct.ConnectRule;
/**
* Configuration for {@link boofcv.abst.fiducial.AztecCodePreciseDetector}
*
* @author Peter Abeles
*/
public class ConfigAztecCode implements Configuration {
/** Specifies how images are thresholded and converted into a binary format */
public ConfigThreshold threshold;
/** Configuration for polygon detector that's used to find position patterns */
public ConfigPolygonDetector polygon = new ConfigPolygonDetector();
/**
* If true it will consider transposed markers, i.e. mirror image. Set to false if
* you know your markers are standard compliant and want a modest speed boost.
*/
public boolean considerTransposed = true;
/**
* Maximum number of incorrect readings in orientation pattern that are accepted. max 12 for compact.
* 16 for full-range. Full-range includes reference grid.
*/
public int maxOrientationError = 4;
{
// fast but does a bad job detecting fiducials that are up close
ConfigThresholdLocalOtsu configThreshold = ConfigThreshold.local(ThresholdType.BLOCK_OTSU, 40);
configThreshold.useOtsu2 = true;
// 0.95 makes it better some times but worse overall
configThreshold.scale = 1.0;
// this will hurt small distant targets but allows up close to work
configThreshold.thresholdFromLocalBlocks = true;
configThreshold.tuning = 4;
threshold = configThreshold;
polygon.detector.contourRule = ConnectRule.EIGHT;
polygon.detector.clockwise = false;
((ConfigPolylineSplitMerge)polygon.detector.contourToPoly).maxSideError = ConfigLength.relative(0.12, 3);
((ConfigPolylineSplitMerge)polygon.detector.contourToPoly).cornerScorePenalty = 0.4;
((ConfigPolylineSplitMerge)polygon.detector.contourToPoly).minimumSideLength = 2;
// 28 pixels = 7 by 7 square viewed head on. Each cell is then 1 pixel. Any slight skew results in
// aliasing and will most likely not be read well.
polygon.detector.minimumContour = ConfigLength.fixed(40);
// can handle much darker images. No measurable decrease in speed
polygon.detector.minimumEdgeIntensity = 3;
polygon.minimumRefineEdgeIntensity = 6;
// TODO This needs to be reduced for smaller shapes, but should be larger to better handle blur? Experiment
polygon.detector.tangentEdgeIntensity = 1.5;
}
/**
* Default configuration for a QR Code detector which is optimized for speed
*/
public static ConfigAztecCode fast() {
// A global threshold is faster than any local algorithm
// plus it will generate a simpler set of internal contours speeding up that process
var config = new ConfigAztecCode();
config.threshold = ConfigThreshold.global(ThresholdType.GLOBAL_OTSU);
return config;
}
public ConfigAztecCode setTo( ConfigAztecCode src ) {
this.threshold.setTo(src.threshold);
this.polygon.setTo(src.polygon);
this.considerTransposed = src.considerTransposed;
this.maxOrientationError = src.maxOrientationError;
return this;
}
@Override
public void checkValidity() {
threshold.checkValidity();
polygon.checkValidity();
if (maxOrientationError < 0)
throw new IllegalArgumentException("maxOrientationError must be >= 0");
}
}