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GNU AFFERO GENERAL PUBLIC LICENSE
Version 3, 19 November 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The GNU Affero General Public License is a free, copyleft license for
software and other kinds of works, specifically designed to ensure
cooperation with the community in the case of network server software.
The licenses for most software and other practical works are designed
to take away your freedom to share and change the works. By contrast,
our General Public Licenses are intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
software for all its users.
When we speak of free software, we are referring to freedom, not
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Developers that use our General Public Licenses protect your rights
with two steps: (1) assert copyright on the software, and (2) offer
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A secondary benefit of defending all users' freedom is that
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software used on network servers, this result may fail to come about.
The GNU General Public License permits making a modified version and
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The GNU Affero General Public License is designed specifically to
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0. Definitions.
"This License" refers to version 3 of the GNU Affero General Public License.
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or that patent license was granted, prior to 28 March 2007.
Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.
12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or
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to collect a royalty for further conveying from those to whom you convey
the Program, the only way you could satisfy both those terms and this
License would be to refrain entirely from conveying the Program.
13. Remote Network Interaction; Use with the GNU General Public License.
Notwithstanding any other provision of this License, if you modify the
Program, your modified version must prominently offer all users
interacting with it remotely through a computer network (if your version
supports such interaction) an opportunity to receive the Corresponding
Source of your version by providing access to the Corresponding Source
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means of facilitating copying of software. This Corresponding Source
shall include the Corresponding Source for any work covered by version 3
of the GNU General Public License that is incorporated pursuant to the
following paragraph.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU General Public License into a single
combined work, and to convey the resulting work. The terms of this
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but the work with which it is combined will remain governed by version
3 of the GNU General Public License.
14. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions of
the GNU Affero General Public License from time to time. Such new versions
will be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the
Program specifies that a certain numbered version of the GNU Affero General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of the
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by the Free Software Foundation.
If the Program specifies that a proxy can decide which future
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Later license versions may give you additional or different
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author or copyright holder as a result of your choosing to follow a
later version.
15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
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ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
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IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source. For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<http://www.gnu.org/licenses/>.
Makefile 0 → 100755
View file @ ab9a8724
#/***********************************************************************
# This file is part of LiPRec, License Plate REcognition.
#
# Copyright (C) 2012 Franco (nextime) Lanza <nextime@nexlab.it>
#
# LiPRec is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# LiPRec is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with LiPRec. If not, see <http://www.gnu.org/licenses/>.
#************************************************************************/
OBJECTS =libliprec.o libliprec.so liprec
CFLAGS= -O3 -march=native -Wall
CPPFLAGS= -fpermissive -O3 -march=native -Wall
CPPFLAGS+=$(shell pkg-config --cflags opencv)
CPPFLAGS=-L. -L/usr/lib -I/usr/include
LDFLAGS=-ltesseract
LDFLAGS+=$(shell pkg-config --cflags --libs opencv)
all: ${OBJECTS}
debug: CFLAGS+=-D__DEBUG -g
debug: CPPFLAGS+=-D__DEBUG
debug: clean all
verbosedebug: CFLAGS+=-D__SHOWIMAGES
verbosedebug: CPPFLAGS+=-D__SHOWIMAGES
verbosedebug: debug
libliprec.o: libliprec.cpp
$(CXX) libliprec.cpp -fPIC -c -o libliprec.o $(CPPFLAGS)
libliprec.so:
$(CXX) -o libliprec.so -Wall -shared libliprec.o $(LDFLAGS)
liprec: liprec.cpp
$(CXX) liprec.cpp -o liprec -lliprec ${LDFLAGS} $(CPPFLAGS)
lib_install:
install -m 0644 libliprec.so /usr/lib
install -m 0644 liprec.h /usr/include
ldconfig
install: lib_install
install -m 0755 liprec /usr/bin/
clean:
rm -f $(OBJECTS)
libliprec.cpp 0 → 100644
View file @ ab9a8724
/***********************************************************************
This file is part of LiPRec, License Plate REcognition.
Copyright (C) 2012 Franco (nextime) Lanza <nextime@nexlab.it>
LiPRec is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
LiPRec is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with LiPRec. If not, see <http://www.gnu.org/licenses/>.
************************************************************************/
#include "liprec.h"
#include <stdexcept>
#include <string>
#include "opencv2/opencv.hpp"
#ifdef __SHOWIMAGES
#include "opencv2/highgui/highgui.hpp"
#endif
namespace liprec
{
cv::String Filter(const std::string &to)
{
cv::String final;
for(cv::String::const_iterator it = to.begin(); it != to.end(); ++it)
{
if((*it >= '0' && *it <= '9') || (*it >= 'A' && *it <= 'Z'))
{
final += *it;
}
}
return final;
}
class LiprecException : public std::runtime_error
{
public:
LiprecException(const char* except) : runtime_error(except) { }
};
LiPRec::LiPRec(int optimization,
int contour,
int platecont,
tesseract::PageSegMode pagetype,
int min_ocr_confidence
)
{
opt=optimization;
cont=contour;
pcont=platecont;
ocr_ptype=pagetype;
min_confidence=min_ocr_confidence;
startOCR(pagetype);
thr_min=128;
thr_max=255;
athr_size=21;
thrp_min=130;
thrp_max=255;
athrp_size=11;
perimeter_constant = 35/1000.0;
#ifdef __DEBUG
std::cout << "LiPRec Initialized\n";
#endif
#ifdef __SHOWIMAGES
cv::namedWindow("original", 0);
cv::namedWindow("edge", 0);
cv::namedWindow("crop", 0);
cv::namedWindow("mask", 0);
cv::namedWindow("optimized", 0);
cv::namedWindow("ocr", 0);
cv::waitKey();
#endif
}
LiPRec::~LiPRec()
{
if(OCR!=NULL)
{
OCR->Clear();
OCR->End();
delete OCR;
}
}
void LiPRec::startOCR(tesseract::PageSegMode pagetype)
{
#ifdef __DEBUG
std::cout << "LiPRec startOCR\n";
#endif
OCR = new tesseract::TessBaseAPI();
if(OCR->Init(NULL, NULL, tesseract::OEM_DEFAULT, NULL, 0, NULL, NULL, false)) {
delete OCR;
throw LiprecException("Could not initialize tesseract OCR");
}
OCR->SetPageSegMode(pagetype);
OCR->SetVariable("tessedit_char_whitelist", "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ");
}
void LiPRec::maximizeContrast(cv::Mat &img)
{
#ifdef __DEBUG
std::cout << "LiPRec maximizeContrast\n";
#endif
cv::Mat el=getStructuringElement(cv::MORPH_ELLIPSE, cv::Size(3,3), cv::Point(1,1));
cv::Mat bh(img.rows, img.cols, CV_8UC1);
cv::Mat th(img.rows, img.cols, CV_8UC1);
cv::Mat s1(img.rows, img.cols, CV_8UC1);
cv::morphologyEx(img, th, cv::MORPH_TOPHAT, el, cv::Point(1,1), 1);
cv::morphologyEx(img, bh, cv::MORPH_BLACKHAT, el, cv::Point(1,1), 1);
cv::add(img, th, s1);
cv::subtract(s1,bh, img);
}
void LiPRec::extractV(const cv::Mat &inimg, cv::Mat &outimg)
{
#ifdef __DEBUG
std::cout << "LiPRec extractV\n";
#endif
cv::Mat tvframe(inimg.rows, inimg.cols, CV_8UC3);
cvtColor(inimg, tvframe, CV_RGB2HSV);
int from_to[] = { 2,0 };
mixChannels( &tvframe, 1, &outimg,1, from_to, 1);
}
void LiPRec::optimizeImage(const cv::Mat &inimg, cv::Mat &outimg)
{
#ifdef __DEBUG
std::cout << "LiPRec optimizeImage\n";
#endif
switch(opt)
{
case LIPREC_OPTIMIZATION_GREY_BASIC:
cvtColor(inimg, outimg, CV_RGB2GRAY);
break;
case LIPREC_OPTIMIZATION_HSV_BASIC:
extractV(inimg, outimg);
break;
case LIPREC_OPTIMIZATION_GREY_DEEP:
cvtColor(inimg, outimg, CV_RGB2GRAY);
maximizeContrast(outimg);
// Smooth image to remove rumor...
cv::GaussianBlur(outimg, outimg, cv::Size(5,5), 5, 5, cv::BORDER_DEFAULT);
break;
case LIPREC_OPTIMIZATION_HSV_DEEP:
extractV(inimg, outimg);
maximizeContrast(outimg);
// Smooth image to remove rumor...
cv::GaussianBlur(outimg, outimg, cv::Size(5,5), 5, 5, cv::BORDER_DEFAULT);
break;
}
}
void LiPRec::setPerimeterConstant(int val)
{
#ifdef __DEBUG
std::cout << "LiPRec setPerimeterConstant\n";
#endif
perimeter_constant = val/1000.0;
}
void LiPRec::setThreshold(int min, int max)
{
#ifdef __DEBUG
std::cout << "LiPRec setThreshold\n";
#endif
thr_min=min;
thr_max=max;
}
void LiPRec::setAutothreshold(int size)
{
#ifdef __DEBUG
std::cout << "LiPRec setAutoThreshold\n";
#endif
athr_size=size;
}
void LiPRec::setPlateThreshold(int min, int max)
{
#ifdef __DEBUG
std::cout << "LiPRec setPlateThreshold\n";
#endif
thrp_min=min;
thrp_max=max;
}
void LiPRec::setPlateAutothreshold(int size)
{
#ifdef __DEBUG
std::cout << "LiPRec setAutoPlatethreshold\n";
#endif
athrp_size=size;
}
void LiPRec::detectPlates(cv::Mat &img, PlatesImage* plates,
int min_area, int max_area)
{
#ifdef __DEBUG
std::cout << "LiPRec detectPlates no optimized\n";
#endif
cv::Mat optimized(img.rows, img.cols, CV_8UC1);
optimizeImage(img, optimized);
_detectPlates(img, optimized, plates, min_area, max_area);
}
void LiPRec::detectPlates(cv::Mat &img, cv::Mat &optimizedimage, PlatesImage* plates,
int min_area, int max_area)
{
#ifdef __DEBUG
std::cout << "LiPRec detectPlates optimized\n";
#endif
_detectPlates(img, optimizedimage, plates, min_area, max_area);
}
void LiPRec::_detectPlates(cv::Mat &img, cv::Mat &optimizedimage, PlatesImage* plates,
int min_area, int max_area)
{
#ifdef __DEBUG
std::cout << "LiPRec detectPlates real\n";
#endif
#ifdef __SHOWIMAGES
imshow("original",img);
#endif
cv::Mat edge;
switch(cont)
{
case LIPREC_CONTOUR_THRESHOLD:
cv::threshold( optimizedimage, edge, thr_min, thr_max, CV_THRESH_BINARY );
break;
case LIPREC_CONTOUR_AUTOTHRESHOLD:
cv::adaptiveThreshold(optimizedimage, edge, thr_min,
CV_ADAPTIVE_THRESH_GAUSSIAN_C, CV_THRESH_BINARY_INV, athr_size, 5);
break;
case LIPREC_CONTOUR_CANNY:
default:
cv::Canny(optimizedimage, edge, thr_min, thr_max);
}
img.copyTo(plates->image);
optimizedimage.copyTo(plates->optimizedimage);
std::vector< std::vector<cv::Point> > contours;
cv::findContours(edge, contours, CV_RETR_EXTERNAL, CV_CHAIN_APPROX_NONE);
#ifdef __SHOWIMAGES
imshow("edge",edge);
#endif
std::vector<double> areas(contours.size());
unsigned int i;
for( i = 0; i < contours.size(); i++) {
areas[i] = std::fabs(cv::contourArea(cv::Mat(contours[i])));
if(areas[i] >= min_area && areas[i] <= max_area) {
std::vector<cv::Point> results;
cv::approxPolyDP(cv::Mat(contours[i]), results,
cv::arcLength(cv::Mat(contours[i]),1)*perimeter_constant,1);
if (results.size() == 4 && cv::isContourConvex(results)) {
#ifdef __DEBUG
std::cout << "LiPRec Possible plate found\n";
#endif
// Prepare a mask image
cv::Mat mask = cv::Mat::zeros(img.rows, img.cols, CV_8UC1);
// draw the contours filled on the mask
cv::drawContours(mask, contours, i, cv::Scalar(255,255,255), CV_FILLED);
// draw contours on the optimized image to remove external lines
cv::drawContours(optimizedimage, contours, i, cv::Scalar(255,255,255), 2, 2);
// get rectangle of the possible plate
cv::Rect box = cv::boundingRect(cv::Mat(contours[i]));
// prepare a new image to copy the masked rectangle
cv::Mat crop(img.rows, img.cols, CV_8UC1);
crop.setTo(cv::Scalar(0));
// copy the masked rectangle
optimizedimage.copyTo(crop, mask);
#ifdef __SHOWIMAGES
imshow("optimized",optimizedimage);
imshow("crop", crop);
#endif
// back to the original optimized, so, we dont get the white contour
plates->optimizedimage.copyTo(optimizedimage);
// set the region of interest where the masked rectangle is
cv::Mat roi(crop, box);
// prepare an image for the OCR with size equal to the rectangle
cv::Mat ocrimg(roi.rows, roi.cols, CV_8UC1);
ocrimg.setTo(cv::Scalar(255));
roi.copyTo(ocrimg, roi);
// we need to resize the image for the OCR...
if(ocrimg.rows < 150) {
int scalefactor = 150/ocrimg.rows;
cv::resize(ocrimg, ocrimg, cv::Size(0,0), scalefactor, scalefactor, CV_INTER_CUBIC);
}
// and then get a thresholded image to pass to OCR..
switch(pcont)
{
case LIPREC_PLATECON_AUTOTHRESHOLD:
cv::adaptiveThreshold(ocrimg, ocrimg, thrp_min,
CV_ADAPTIVE_THRESH_GAUSSIAN_C, CV_THRESH_BINARY, athrp_size, 5);
break;
case LIPREC_PLATECON_CANNY:
cv::Canny(ocrimg, ocrimg, thrp_min, thrp_max);
break;
case LIPREC_PLATECON_THRESHOLD:
default:
cv::threshold(ocrimg, ocrimg, thrp_min, thrp_max, CV_THRESH_BINARY );
}
// NOTE: using OCR this way make the library work
// only with plates that uses occidental english alphabet and arabic numbers...
#ifdef __SHOWIMAGES
imshow("ocr",ocrimg);
imshow("mask",mask);
#endif
OCR->SetImage((uchar*)ocrimg.data, ocrimg.size().width, ocrimg.size().height,
ocrimg.channels(), ocrimg.step1());
OCR->Recognize(0);
// XXX Gestire il caso in cui c'e' pagetype a single char
char* detected_text = OCR->GetUTF8Text();
int confidence = OCR->MeanTextConf();
//cout << "Size text: " << strlen(detected_text) << endl;
if(strlen(detected_text) > 0 && confidence>=min_confidence) {
cv::String clean_text;
clean_text = Filter(cv::String(detected_text));
if(clean_text.size() > 0)
{
// Hey! maybe we have a plate!
// XXX TODO: here we need to write a parser that try to recognize
// only valid plates schemas. To do that probably
// we need also a database of various plates schema in
// used around the world.
#ifdef __DEBUG
std::cout << "LiPRec FOUND PLATE: " << clean_text << std::endl;
std::cout << "Confidence level: " << confidence << std::endl;
std::cout << "PLATE lenght: " << clean_text.size() << std::endl;
#ifdef __SHOWIMAGES
cv::waitKey();
#endif
#endif
Plate plate;
ocrimg.copyTo(plate.ocrimage);
img.copyTo(plate.contours);
rectangle(plate.contours, box, cv::Scalar(0,0,255), 3);
plate.rect = box;
plate.platetxt = clean_text;
plate.confidence = confidence;
plates->plates.push_back(plate);
rectangle(plates->contours, box, cv::Scalar(0,0,255), 3);
}
}
}
}
}
}
} // end namespace liprec
liprec.cpp 0 → 100644
View file @ ab9a8724
/***********************************************************************
This file is part of LiPRec, License Plate REcognition.
Copyright (C) 2012 Franco (nextime) Lanza <nextime@nexlab.it>
LiPRec is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
LiPRec is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with LiPRec. If not, see <http://www.gnu.org/licenses/>.
************************************************************************/
#include "liprec.h"
#include "opencv2/opencv.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "optionparser.h"
using namespace liprec;
using namespace std;
using namespace cv;
enum optionIndex { OPT_UNKNOWN, OPT_HELP, OPT_DEBUG, OPT_GUI, OPT_PAUSE};
const option::Descriptor usage[] =
{
{OPT_UNKNOWN, 0,"", "" ,option::Arg::None, "USAGE: liprec [options] <video_file|image_file|video uri>\n\n"
"Options:" },
{OPT_HELP, 0,"h","help",option::Arg::None, " -h, --help \tPrint usage and exit." },
{OPT_DEBUG, 0,"d","debug",option::Arg::Optional, " -d[level], --debug[=level] \tSet debug level."},
{OPT_GUI, 0,"g","gui",option::Arg::None, " -g, --gui \tshow graphic UI." },
{OPT_PAUSE, 0,"p","",option::Arg::None, " -p \tpause video on plate detected\n"},
{OPT_UNKNOWN, 0,"", "" ,option::Arg::None, "\nExamples:\n"
" liprec -d file1.mjpeg\n"
" liprec http://<ip_addr>/img/video.h264\n"
" liprec -g file.jpg\n" },
{0,0,0,0,0,0}
};
int main(int argc, char* argv[])
{
int debug_level=0;
int use_gui=0;
int pause=0;
Mat frame;
LiPRec plateDetector;
argc-=(argc>0); argv+=(argc>0); // skip program name argv[0] if present
option::Stats stats(usage, argc, argv);
option::Option options[stats.options_max], buffer[stats.buffer_max];
option::Parser parse(usage, argc, argv, options, buffer);
if(parse.error())
{
cout << "Error parsing options\n";
return -1;
}
double imgnum=0;
#ifdef __DEBUG
debug_level=1;
#endif
#ifdef __SHOWIMAGES
debug_level=2;
#endif
//if( argc != 2) {
if(parse.nonOptionsCount()<1) {
cout << "You must specify a file to load\n\n";
option::printUsage(std::cout, usage);
return -1;
}
if (options[OPT_HELP]) {
option::printUsage(std::cout, usage);
return 0;
}
for (int i = 0; i < parse.optionsCount(); ++i) {
option::Option& opt = buffer[i];
switch(opt.index()) {
case OPT_HELP:
option::printUsage(std::cout, usage);
return 0;
case OPT_DEBUG:
debug_level=1;
if(opt.arg && atoi(opt.arg)<3)
{
debug_level=atoi(opt.arg);
if(debug_level > 0)
cout << "Debug level is " << debug_level << endl;
if(debug_level > 1)
use_gui=1;
}
break;
case OPT_GUI:
use_gui=1;
break;
case OPT_PAUSE:
pause=1;
break;
}
}
//VideoCapture cap(argv[1]);
VideoCapture cap(parse.nonOption(0));
if(!cap.isOpened()) {
cout << "Cannot open file " << argv[1] << endl;
return -1;
}
if(use_gui) {
cv::namedWindow("LiPRec", 0);
}
for(;;) {
//#ifdef __DEBUG
if(debug_level) {
imgnum++;
cout << "Working in frame # " << imgnum << endl;
}
if(cap.grab())
cap.retrieve(frame);
else
{
cout << "Video is over\n";
cv::waitKey(0);
break;
}
PlatesImage plates;
//plateDetector.optimizeImage(frame, frame);
plateDetector.detectPlates(frame, &plates);
if(debug_level) {
cout << "Plates vector size: " << plates.plates.size() << endl;
}
if(use_gui) {
cv::imshow("LiPRec", plates.image);
}
if(plates.plates.size() > 0) {
for(unsigned int i=0;i<plates.plates.size();i++) {
cout << "** Plates found: " << plates.plates[i].platetxt;
cout << " (confidence:" << plates.plates[i].confidence << ")" << endl;
}
if(pause) {
if(use_gui) {
cv::waitKey();
}
else {
std::cout << "Press enter to continue: ";
std::cin >> pause;
}
}
}
if(debug_level>1 || use_gui) {
if(cv::waitKey(30) >= 0) break;
}
}
return 0;
}
liprec.h 0 → 100644
View file @ ab9a8724
/***********************************************************************
This file is part of LiPRec, License Plate REcognition.
Copyright (C) 2012 Franco (nextime) Lanza <nextime@nexlab.it>
LiPRec is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
LiPRec is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with LiPRec. If not, see <http://www.gnu.org/licenses/>.
************************************************************************/
#ifndef __LIPREC_H__
#define __LIPREC_H__
#define LIPREC_OPTIMIZATION_GREY_BASIC (1)
#define LIPREC_OPTIMIZATION_HSV_BASIC (2)
#define LIPREC_OPTIMIZATION_GREY_DEEP (3)
#define LIPREC_OPTIMIZATION_HSV_DEEP (4)
#define LIPREC_CONTOUR_THRESHOLD (1)
#define LIPREC_CONTOUR_AUTOTHRESHOLD (2)
#define LIPREC_CONTOUR_CANNY (3)
#define LIPREC_PLATECON_THRESHOLD (1)
#define LIPREC_PLATECON_AUTOTHRESHOLD (2)
#define LIPREC_PLATECON_CANNY (3)
#ifdef __cplusplus
#include "opencv2/opencv.hpp"
//#include "opencv2/highgui/highgui.hpp"
#include "tesseract/baseapi.h"
#define TESSERACT_PAGETYPE_BLOCK (tesseract::PSM_SINGLE_BLOCK)
#define TESSERACT_PAGETYPE_SINGLE_VERT (tesseract::PSM_SINGLE_BLOCK_VERT_TEXT)
#define TESSERACT_PAGETYPE_SINGLE_CHAR (tesseract::PSM_SINGLE_CHAR)
namespace liprec
{
class Plate {
public:
cv::Mat contours;
cv::Mat ocrimage;
cv::Rect rect;
cv::String platetxt;
int confidence;
//~Plate();
};
class PlatesImage {
public:
cv::Mat image;
cv::Mat optimizedimage;
cv::Mat contours;
std::vector<Plate> plates;
//~PlatesImage();
};
class LiPRec {
public:
LiPRec(int optimization=LIPREC_OPTIMIZATION_GREY_BASIC,
int contour=LIPREC_CONTOUR_CANNY,
int platecont=LIPREC_PLATECON_THRESHOLD,
tesseract::PageSegMode pagetype=TESSERACT_PAGETYPE_BLOCK,
int min_ocr_confidence=33
);
void optimizeImage(const cv::Mat &inimg, cv::Mat &outimg);
void detectPlates(cv::Mat &img, PlatesImage* plates,
int min_area=600, int max_area=6000);
void detectPlates(cv::Mat &img, cv::Mat &optimizedimage, PlatesImage* plates,
int min_area=600, int max_area=6000);
void setThreshold(int min=128, int max=255);
void setAutothreshold(int size=21);
void setPlateThreshold(int min, int max=255);
void setPlateAutothreshold(int size=11);
void setPerimeterConstant(int val=35);
virtual ~LiPRec(); // descructor
private:
int opt, cont, pcont, min_confidence;
int thr_min, thr_max, athr_size;
int thrp_min, thrp_max, athrp_size;
float perimeter_constant;
tesseract::TessBaseAPI *OCR;
tesseract::PageSegMode ocr_ptype;
void startOCR(tesseract::PageSegMode pagetype);
void maximizeContrast(cv::Mat &img);
void extractV(const cv::Mat &inimg, cv::Mat &outimg);
void _detectPlates(cv::Mat &img, cv::Mat &optimizedimage, PlatesImage* plates,
int min_area=600, int max_area=6000);
};
}
#endif // __cplusplus
#endif // #ifndef __LIPREC_H
liprec_old.cpp 0 → 100644
View file @ ab9a8724
/***********************************************************************
This file is part of LiPRec, License Plate REcognition.
Copyright (C) 2012 Franco (nextime) Lanza <nextime@nexlab.it>
LiPRec is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
LiPRec is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with LiPRec. If not, see <http://www.gnu.org/licenses/>.
************************************************************************/
#include "opencv2/opencv.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "tesseract/baseapi.h"
using namespace cv;
using namespace std;
using namespace tesseract;
int high_switch_value = 35;
float perimeter_constant = high_switch_value/1000.0;
int minimum_area= 600.0;
int maximum_area= 6000.0;
int threshold_val = 128;
int threshold2_val = 130;
int athr_size = 21;
int athr2_size = 11;
void switch_callback_h( int position, void* udata ){
perimeter_constant = position/1000.0;
}
/* NOTE: only for adaptive threshold */
//void athr_callback(int position, void* udata){
// // we need a non-pair value for adaptive threshold!
// if(*((int*)udata)%2==0)
// *((int*)udata)+=1;
//}
int main(int argc, char* argv[]) {
const char* name_main = "Plate Recognition";
const char* name_edge = "Edge Window";
#if defined(__DMDEBUG)
const char* name_mask = "Mask Window";
#endif
const char* name_bwframe = "BW Window";
const char* name_crop = "CROP Window";
const char* name_ctrl = "Control Window";
unsigned int i;
Mat frame;
Mat bwframe;
Mat edge;
TessBaseAPI *OCR = new TessBaseAPI();
if(OCR->Init(NULL, "eng")) {
cout << "Could not initialize tesseract OCR\n";
return -1;
}
if( argc != 2) {
cout << "You must specify a file to load\n";
return -1;
}
VideoCapture cap(argv[1]);
if(!cap.isOpened()) {
cout << "Cannot open file " << argv[1] << endl;
return -1;
}
namedWindow(name_main, 0);
namedWindow(name_edge, 0);
#if defined(__DMDEBUG)
namedWindow(name_mask, 0);
#endif
namedWindow(name_bwframe, 0);
namedWindow(name_ctrl, 0);
//#if defined(__DMDEBUG)
namedWindow(name_crop, 0);
namedWindow("AAA", 0);
//#endif
createTrackbar( "Contour perimeter", name_ctrl, &high_switch_value, 100, switch_callback_h, NULL );
createTrackbar( "Min area", name_ctrl, &minimum_area, 100000, NULL, NULL);
createTrackbar( "Max area", name_ctrl, &maximum_area, 100000, NULL, NULL);
createTrackbar( "Threshold", name_ctrl, &threshold_val, 255, NULL, NULL);
//createTrackbar( "thr size", name_ctrl, &athr_size, 255, athr_callback, &athr_size);
createTrackbar( "Plate Thr", name_ctrl, &threshold2_val, 255, NULL, NULL);
//createTrackbar( "PThr size", name_ctrl, &athr2_size, 255, athr_callback, &athr2_size);
waitKey();
for(;;) {
//try {
cap >> frame;
//} catch(int e) {
// frame = imread(argv[1], 3);
//}
cvtColor(frame, bwframe, CV_RGB2GRAY);
imshow(name_bwframe, bwframe);
// extract V channel from HSV image
Mat vframe(frame.rows, frame.cols, CV_8UC1);
Mat tvframe(frame.rows, frame.cols, CV_8UC3);
cvtColor(frame, tvframe, CV_RGB2HSV);
int from_to[] = { 2,0 };
mixChannels( &tvframe, 1, &vframe,1, from_to, 1);
// maximize contrast
// https://github.com/oesmith/OpenANPR/blob/master/anpr/preprocess.py
Mat el=getStructuringElement(MORPH_ELLIPSE, Size(3,3), Point(1,1));
Mat bh(vframe.rows, vframe.cols, CV_8UC1);
Mat th(vframe.rows, vframe.cols, CV_8UC1);
Mat s1(vframe.rows, vframe.cols, CV_8UC1);
morphologyEx(vframe, th, MORPH_TOPHAT, el, Point(1,1), 1);
morphologyEx(vframe, bh, MORPH_BLACKHAT, el, Point(1,1), 1);
add(vframe, th, s1);
subtract(s1,bh, vframe);
// Smooth image to remove rumor
GaussianBlur(vframe, vframe, Size(5,5), 5, 5, BORDER_DEFAULT);
imshow("AAA", vframe);
// apply your filter
Canny(bwframe, edge, threshold_val, 255);
//Canny(vframe, edge, threshold_val, 255);
//threshold( bwframe, edge, threshold_val, 255, CV_THRESH_BINARY );
//threshold( vframe, edge, threshold_val, 255, CV_THRESH_BINARY );
//adaptiveThreshold(bwframe, edge, threshold_val,
// CV_ADAPTIVE_THRESH_GAUSSIAN_C, CV_THRESH_BINARY, athr_size, 5);
// OR CV_ADAPTIVE_THRES_MEAN_C
//adaptiveThreshold(vframe, edge, threshold_val, CV_ADAPTIVE_THRESH_GAUSSIAN_C, CV_THRESH_BINARY_INV, athr_size, 9);
// find the contours
vector< vector<Point> > contours;
findContours(edge, contours, CV_RETR_EXTERNAL, CV_CHAIN_APPROX_NONE);
vector<double> areas(contours.size());
for( i = 0; i < contours.size(); i++) {
areas[i] = fabs(contourArea(Mat(contours[i])));
if(areas[i] >= minimum_area && areas[i] <= maximum_area) {
vector<Point> results;
approxPolyDP(Mat(contours[i]), results, arcLength(Mat(contours[i]),1)*perimeter_constant,1);
if (results.size() == 4 && isContourConvex(results)){
// you could also reuse bwframe here
Mat mask = Mat::zeros(bwframe.rows, bwframe.cols, CV_8UC1);
// CV_FILLED fills the connected components found
drawContours(mask, contours, i, Scalar(255,255,255), CV_FILLED);
// draw contours to cover plate external lines
drawContours(bwframe, contours, i, Scalar(255,255,255), 2, 2);
Rect box = boundingRect(Mat(contours[i]));
// let's create a new image now
Mat crop(frame.rows, frame.cols, CV_8UC1);
// set background color to black
//crop.setTo(Scalar(0,0,0));
crop.setTo(Scalar(0));
// and copy the magic apple
bwframe.copyTo(crop, mask);
// normalize so imwrite(...)/imshow(...) shows the mask correctly!
normalize(mask.clone(), mask, 0.0, 255.0, CV_MINMAX, CV_8UC1);
//rectangle(crop, box, Scalar(0,0,255) ,3);
Mat roi(crop, box);
// Image for OCR
Mat ocrimg(roi.rows, roi.cols, CV_8UC1);
ocrimg.setTo(Scalar(255));
roi.copyTo(ocrimg, roi);
int scalefactor = 1000/ocrimg.cols;
//cout << "Scale factor: " << scalefactor << endl;;
resize(ocrimg, ocrimg, Size(0,0), scalefactor, scalefactor, CV_INTER_CUBIC);
threshold(ocrimg, ocrimg, threshold2_val, 255, CV_THRESH_BINARY );
//adaptiveThreshold(ocrimg, ocrimg, threshold2_val,
// CV_ADAPTIVE_THRESH_GAUSSIAN_C, CV_THRESH_BINARY, athr2_size, 5);
//Canny(ocrimg, ocrimg, threshold2_val, 255);
//#if defined(__DMDEBUG)
imshow(name_crop, ocrimg);
//#endif
rectangle(frame, box, Scalar(0,0,255), 3);
rectangle(bwframe, box, Scalar(0,0,255), 3);
#if defined(__DMDEBUG)
imshow(name_mask, mask);
#endif
//OCR->TesseractRect(roi.data, 1, roi.step1(), 0,0,roi.cols, roi.rows);
OCR->SetImage((uchar*)ocrimg.data, ocrimg.size().width, ocrimg.size().height,
ocrimg.channels(), ocrimg.step1());
OCR->Recognize(0);
char* detected_text = OCR->GetUTF8Text();
//cout << "Size text: " << strlen(detected_text) << endl;
if(strlen(detected_text) > 0) {
cout << "License plate number: " << detected_text << endl;
//#if !defined(__DMDEBUG)
//imshow(name_crop, ocrimg);
//#endif
imshow(name_main, frame);
imshow(name_bwframe, bwframe);
imshow(name_edge, edge);
imshow(name_ctrl, ocrimg);
#if defined(__DMDEBUG)
imwrite("antani.jpg", ocrimg);
#endif
waitKey();
//#endif
}
}
}
}
imshow(name_main, frame);
imshow(name_bwframe, bwframe);
imshow(name_edge, edge);
if(waitKey(30) >= 0) break;
}
return 0;
}
optionparser.h 0 → 100644
View file @ ab9a8724
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