libdecodeqr是一個开源的C/C++ QR 二维条码识别库

///////////////////////////////////////////////////////////////////////// // // imagereader.cpp --a part of libdecodeqr // // Copyright(C) 2007 NISHI Takao <zophos@koka-in.org> // JMA (Japan Medical Association) // NaCl (Network Applied Communication Laboratory Ltd.) // // This is free software with ABSOLUTELY NO WARRANTY. // You can redistribute and/or modify it under the terms of LGPL. // // $Id: imagereader.cpp 36 2007-02-21 23:22:03Z zophos $ // #include "imagereader.h" namespace Qr{ // // avoid cvBoundingRect() fxxcin' bug. // typedef struct{ CvRect feret; CvSeq *contour; } ImageReaderCandidate; ///////////////////////////////////////////////////////////////////// // // // ImageReader::ImageReader() { this->_init(); } ImageReader::ImageReader(int width,int height,int depth,int channel) { this->_init(); this->_alloc_image(width,height,depth,channel); } ImageReader::~ImageReader() { if(this->qr) delete this->qr; if(this->_seq_code_area_contour) cvRelease((void **)&this->_seq_code_area_contour); cvRelease((void **)&this->_seq_finder_pattern); cvReleaseMemStorage(&this->_stor_tmp); cvReleaseMemStorage(&this->_stor); this->release_image(); } void ImageReader::_init() { memset(this->_coderegion_vertexes,0,sizeof(CvPoint)*4); memset(this->_finderpattern_boxes,0,sizeof(CvBox2D)*3); this->_img_src_internal=NULL; this->_img_src=NULL; this->_img_transformed=NULL; this->_img_binarized=NULL; this->_img_tmp_1c=NULL; this->_stor=cvCreateMemStorage(0); this->_stor_tmp=cvCreateMemStorage(0); this->_seq_finder_pattern=cvCreateSeq(CV_SEQ_ELTYPE_GENERIC, sizeof(CvSeq), sizeof(CvBox2D), this->_stor); this->_seq_code_area_contour=NULL; this->status=0; this->qr=NULL; } void ImageReader::_alloc_image(int width,int height,int depth,int channel) { this->_img_src_internal=cvCreateImage(cvSize(width,height), depth,channel); cvZero(this->_img_src_internal); this->_img_src=this->_img_src_internal; this->_img_transformed=cvCloneImage(this->_img_src); this->_img_binarized=cvCreateImage(cvSize(this->_img_src->width, this->_img_src->height), IPL_DEPTH_8U,1); cvZero(this->_img_binarized); this->_img_tmp_1c=cvCloneImage(this->_img_binarized); } IplImage *ImageReader::set_image(IplImage *src) { this->release_image(); this->_img_src=src; this->_img_transformed=cvCloneImage(this->_img_src); this->_img_binarized=cvCreateImage(cvSize(this->_img_src->width, this->_img_src->height), IPL_DEPTH_8U,1); cvZero(this->_img_binarized); this->_img_tmp_1c=cvCloneImage(this->_img_binarized); return(this->_img_src); } IplImage *ImageReader::set_image(int width,int height, int depth,int channel) { this->release_image(); this->_alloc_image(width,height,depth,channel); return(this->_img_src); } void ImageReader::release_image() { if(this->_img_tmp_1c) cvReleaseImage(&this->_img_tmp_1c); if(this->_img_binarized) cvReleaseImage(&this->_img_binarized); if(this->_img_transformed) cvReleaseImage(&this->_img_transformed); if(this->_img_src_internal) cvReleaseImage(&this->_img_src_internal); this->_img_tmp_1c=NULL; this->_img_binarized=NULL; this->_img_transformed=NULL; this->_img_src_internal=NULL; this->_img_src=NULL; } IplImage *ImageReader::src_buffer() { return(this->_img_src); } IplImage *ImageReader::transformed_buffer() { return(this->_img_transformed); } IplImage *ImageReader::binarized_buffer() { return(this->_img_binarized); } IplImage *ImageReader::tmp_buffer() { return(this->_img_tmp_1c); } CvPoint *ImageReader::coderegion_vertexes() { return(this->_coderegion_vertexes); } CvBox2D *ImageReader::finderpattern_boxes() { return(this->_finderpattern_boxes); } Qr *ImageReader::decode(int adaptive_th_size, int adaptive_th_delta) { if(this->status&QR_IMAGEREADER_WORKING) return(NULL); if(!this->_img_src){ this->status=(QR_IMAGEREADER_ERROR| QR_IMAGEREADER_NOT_INVALID_SRC_IMAGE); return(NULL); } this->status=QR_IMAGEREADER_WORKING; cvResetImageROI(this->_img_transformed); cvResetImageROI(this->_img_binarized); cvResetImageROI(this->_img_tmp_1c); Qr *ret=this->_decode(adaptive_th_size,adaptive_th_delta); this->status^=QR_IMAGEREADER_WORKING; return(ret); } Qr *ImageReader::decode(IplImage *src, int adaptive_th_size, int adaptive_th_delta) { if(this->status&QR_IMAGEREADER_WORKING) return(NULL); this->status=QR_IMAGEREADER_WORKING; this->set_image(src); Qr *ret=this->_decode(adaptive_th_size,adaptive_th_delta); this->_img_src=NULL; this->status^=QR_IMAGEREADER_WORKING; return(ret); } Qr *ImageReader::_decode(int adaptive_th_size,int adaptive_th_delta) { if(this->qr){ delete this->qr; this->qr=NULL; } memset(this->_coderegion_vertexes,0,sizeof(CvPoint)*4); memset(this->_finderpattern_boxes,0,sizeof(CvBox2D)*3); // // binarize // if(this->_img_src->nChannels>1) cvCvtColor(this->_img_src,this->_img_tmp_1c,CV_BGR2GRAY); else cvCopy(this->_img_src,this->_img_tmp_1c); cvSmooth(this->_img_tmp_1c,this->_img_binarized,CV_MEDIAN,3); cvCopy(this->_img_binarized,this->_img_tmp_1c); if(adaptive_th_size>0) cvAdaptiveThreshold(this->_img_tmp_1c, this->_img_binarized, 128,CV_ADAPTIVE_THRESH_MEAN_C, CV_THRESH_BINARY_INV, adaptive_th_size, adaptive_th_delta); else cvThreshold(this->_img_tmp_1c, this->_img_binarized, adaptive_th_delta, 255,CV_THRESH_BINARY_INV); // // find finder patterns from binarized image // this->_find_finder_pattern(); if(this->_seq_finder_pattern->total!=3){ this->status|=(QR_IMAGEREADER_ERROR| QR_IMAGEREADER_NOT_FOUND_FINDER_PATTERN); return(NULL); } // // find code area from binarized image using finder patterns // this->_find_code_area_contour(FIND_CODE_AREA_POLY_APPROX_TH); if(!this->_seq_code_area_contour|| this->_seq_code_area_contour->total!=4){ this->status|=(QR_IMAGEREADER_ERROR| QR_IMAGEREADER_NOT_FOUND_CODE_AREA); return(NULL); } // // perspective transform from source image // this->_transform_image(); IplImage *code_matri