/****************************************************************************** * * Copyright (c) 2019 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer. * * 2. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * * HoughLineDetector.cpp * *****************************************************************************/ //2017/06/10 //This is a simple example to apply cv::HoughLinesP API to // a gray scale edged image gotten from cv::Canny API. // See: http://docs.opencv.org/2.4/doc/tutorials/imgproc/imgtrans/hough_lines/hough_lines.html //2019/01/03 #include <opencv2/stitching.hpp> #include <oz++/motif/Label.h> #include <oz++/motif/RowColumn.h> #include <oz++/motif/LabeledTrackBar.h> #include <oz++/opencv/OpenCVScaleComboBox.h> #include <oz++/opencv/OpenCVMainView.h> #include <oz++/opencv/OpenCVImageView.h> #include <oz++/motif/FileOpenDialog.h> namespace OZ { class MainView :public OpenCVMainView { private: /////////////////////////////////////////////// //Inner classes start. class OriginalImageView: public OpenCVImageView { private: cv::Mat originalImage; cv::Mat scaledImage; virtual void display() { show(scaledImage); } public: OriginalImageView(View* parent, const char* name, Args& args) :OpenCVImageView(parent, name, args) { try { const char* filename = (const char*)args.get(XmNimageFileName); int imageLoadingFlag = args.get(XmNimageLoadingFlag); int scalingRatio = (int)args.get(XmNimageScalingRatio); loadImage(filename, imageLoadingFlag, scalingRatio); } catch (OZ::Exception ex) { caught(ex); } } ~OriginalImageView() { } void loadImage(const char* filename, int imageLoadingFlag= CV_LOAD_IMAGE_COLOR, int scalingRatio=100) { originalImage = readImage(filename, imageLoadingFlag); scaleImage(originalImage, scaledImage, scalingRatio); } void rescale(int scalingRatio) { scaledImage.release(); scaleImage(originalImage, scaledImage, scalingRatio); } }; class DetectedImageView: public OpenCVImageView { private: cv::Mat originalImage; cv::Mat grayImage; cv::Mat detectedImage; cv::Mat scaledImage; //The scale image is displayed on this image view. virtual void display() { show(scaledImage); } public: DetectedImageView(View* parent, const char* name, Args& args) :OpenCVImageView(parent, name, args) { try { const char* filename = (const char*)args.get(XmNimageFileName); int imageLoadingFlag = args.get(XmNimageLoadingFlag); int scalingRatio = (int)args.get(XmNimageScalingRatio); loadImage(filename, imageLoadingFlag, scalingRatio); } catch (OZ::Exception ex) { caught(ex); } } ~DetectedImageView() { } void loadImage(const char* filename, int imageLoadingFlag= CV_LOAD_IMAGE_COLOR, int scalingRatio=100) { originalImage = readImage(filename, imageLoadingFlag); detectedImage = originalImage.clone(); detectedImage.create( originalImage.size(), originalImage.type() ); cv::cvtColor( originalImage, grayImage, COLOR_BGR2GRAY ); scaleImage(grayImage, scaledImage, scalingRatio); } void rescale(int scalingRatio) { scaledImage.release(); scaleImage(detectedImage, scaledImage, scalingRatio); } int detect(int threshold1, int threshold2, int scalingRatio) { threshold1 = (threshold1/2)*2 + 1; threshold2 = (threshold2/2)*2 + 1; //1 Apply cv::Canny to the grayImage to get edges in the grayImage. cv::Canny(grayImage, detectedImage, (double)threshold1, (double)threshold2); //2 Apply HoughLinesP to detectedImage returned by cv::Canny. vector<Vec4i> lines; HoughLinesP(detectedImage, lines, 1, CV_PI/180, 50, 50, 10 ); //3 Put a clone of ogirinalImage to the detectedImage, // since the detectedImage is not necessary any more. detectedImage.release(); detectedImage = originalImage.clone(); int detectedNumber = lines.size(); //4 Draw lines on the clone of the original image. for( size_t i = 0; i < lines.size(); i++ ) { Vec4i l = lines[i]; line( detectedImage, Point(l[0], l[1]), Point(l[2], l[3]), Scalar(0,0,255), 3, CV_AA); } scaleImage(detectedImage, scaledImage, scalingRatio); return detectedNumber; } }; //Inner classes end. private: StringT<char> imageFile; int imageLoadingFlag; int imageScalingRatio; //percentage SmartPtr<Label> label; SmartPtr<OriginalImageView> originalImage; SmartPtr<DetectedImageView> detectedImage; SmartPtr<RowColumn> controlPane; SmartPtr<OpenCVScaleComboBox> scaleComboBox; int threshold1Max; int threshold1; SmartPtr<LabeledTrackBar> threshold1TrackBar; int threshold2Max; int threshold2; SmartPtr<LabeledTrackBar> threshold2TrackBar; SmartPtr<Label> detectedNumber; SmartPtr<FileOpenDialog> fileDialog; public: void scaleChanged(Action& action) { int val = scaleComboBox->getScale(); if (val > 0 && imageScalingRatio != val) { imageScalingRatio = val; originalImage -> rescale(imageScalingRatio); detectedImage -> rescale(imageScalingRatio); } } void trackBarScrolled1(Action& action) { threshold1 = threshold1TrackBar->getPosition(); threshold2 = threshold2TrackBar->getPosition(); int number = detectedImage->detect(threshold1, threshold2, imageScalingRatio); setDetectedNumber(number); } void trackBarScrolled2(Action& action) { threshold1 = threshold1TrackBar->getPosition(); threshold2 = threshold2TrackBar->getPosition(); int number = detectedImage->detect(threshold1, threshold2, imageScalingRatio); setDetectedNumber(number); } void cancel(Action& action) { fileDialog->popdown(); } void fileOpen(Action& action) { fileDialog->popup(); } void updateLabel(const char* filename) { CompoundString cs(filename); label->set(XmNlabelString, cs); } void setDetectedNumber(int number) { char string[128]; sprintf(string, "DetectedNumber:%d", number); CompoundString cs(string); detectedNumber->set(XmNlabelString, cs); } void ok(Action& action) { try { imageFile = fileDialog->getFileName(); const char* filename = (const char*)imageFile; printf("filename: %s\n", filename); fileDialog->popdown(); originalImage->invalidate(); originalImage->loadImage(filename, imageLoadingFlag, imageScalingRatio); originalImage->invalidate(); detectedImage ->loadImage(filename, imageLoadingFlag, imageScalingRatio); threshold1 = threshold1TrackBar->getPosition(); threshold2 = threshold2TrackBar->getPosition(); int number = detectedImage->detect(threshold1, threshold2, imageScalingRatio); setDetectedNumber(number); updateLabel(filename); resize(width(), height()); flush(); } catch (OZ::Exception& ex) { caught(ex); } } void resize(Dimension w, Dimension h) { int CP_WIDTH = 200; int LB_HEIGHT = 30; int ww = w-CP_WIDTH; int hh = h - LB_HEIGHT; if (label && originalImage && detectedImage && controlPane ) { label -> reshape(0, 0, w, LB_HEIGHT); originalImage-> reshape(0, LB_HEIGHT, ww/2, hh); detectedImage -> reshape(ww/2, LB_HEIGHT, ww/2-1, hh); controlPane -> reshape(ww-1, LB_HEIGHT, CP_WIDTH+1, hh); //The following two lines are a workaround to erase garbage. controlPane -> unmap(); controlPane -> map(); } flush(); } public: MainView(OpenCVApplication& applet, const char* name, Args& args) :OpenCVMainView(applet, name, args) { BulletinBoard* bboard = getBulletinBoard(); imageFile = "../images/GinzaWako.png"; imageLoadingFlag = CV_LOAD_IMAGE_COLOR; imageScalingRatio = 60; //% try { Args ar; CompoundString fileNamecs(imageFile); ar.set(XmNlabelString, fileNamecs); ar.set(XmNalignment, XmALIGNMENT_BEGINNING); label = new Label(bboard, "", ar); ar.reset(); ar.set(XmNimageFileName, imageFile); ar.set(XmNimageLoadingFlag, imageLoadingFlag); ar.set(XmNimageScalingRatio, imageScalingRatio); originalImage = new OriginalImageView(bboard, "", ar); ar.reset(); ar.set(XmNimageFileName, imageFile); ar.set(XmNimageLoadingFlag, imageLoadingFlag); ar.set(XmNimageScalingRatio, imageScalingRatio); detectedImage = new DetectedImageView(bboard, "", ar); ar.reset(); controlPane = new RowColumn(bboard, "", ar); const char* defaultScale = "60%"; ar.reset(); CompoundString scaler("Scale"); ar.set(XmNlabelString, scaler); ar.set(XmNdefaultScale, defaultScale); scaleComboBox = new OpenCVScaleComboBox(controlPane, "", ar); scaleComboBox->addCallback(XmNselectionCallback, this, (Callback)&MainView::scaleChanged, NULL); threshold1Max = 300; threshold2Max = 300; threshold1 = 120; threshold2 = 130; ar.reset(); CompoundString th1Title("Canny Threshold1:[0,300]"); ar.set(XmNminimum, 0); ar.set(XmNmaximum, threshold1Max); ar.set(XmNvalue, threshold1); ar.set(XmNtitleString, th1Title); threshold1TrackBar = new LabeledTrackBar(controlPane, "", ar); threshold1TrackBar->addCallback(XmNvalueChangedCallback, this, (Callback)&MainView::trackBarScrolled1, NULL); ar.reset(); CompoundString th2Title("Canny Threshold2:[0,300]"); ar.set(XmNminimum, 0); ar.set(XmNmaximum, threshold1Max); ar.set(XmNvalue, threshold1); ar.set(XmNtitleString, th2Title); threshold2TrackBar = new LabeledTrackBar(controlPane, "", ar); threshold2TrackBar->addCallback(XmNvalueChangedCallback, this, (Callback)&MainView::trackBarScrolled2, NULL); ar.reset(); detectedNumber = new Label(controlPane, "", ar); int number = detectedImage->detect(threshold1, threshold2, imageScalingRatio); setDetectedNumber(number); ar.reset(); fileDialog = new FileOpenDialog(this, "FileOpenDialog", ar); fileDialog -> getOkButton() -> addCallback(XmNactivateCallback, this, (Callback)&MainView::ok, NULL); sendConfigureEvent(); } catch(OZ::Exception& ex) { caught(ex); } } ~MainView() { } }; } // int main(int argc, char** argv) { try { const char* appclass = argv[0]; OpenCVApplication applet(appclass, argc, argv); Args args; args.set(XmNwidth, 900); args.set(XmNheight, 380); MainView view(applet, argv[0], args); view.realize(); applet.run(); } catch (OZ::Exception& ex) { caught(ex); } return 0; }