441 lines
12 KiB
Text
441 lines
12 KiB
Text
// Copyright (C) 2007 by Cristóbal Carnero Liñán
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// grendel.ccl@gmail.com
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//
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// This file is part of cvBlob.
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//
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// cvBlob is free software: you can redistribute it and/or modify
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// it under the terms of the Lesser GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// cvBlob is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// Lesser GNU General Public License for more details.
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//
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// You should have received a copy of the Lesser GNU General Public License
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// along with cvBlob. If not, see <http://www.gnu.org/licenses/>.
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//
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#include <stdexcept>
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#include <iostream>
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using namespace std;
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#if (defined(_WIN32) || defined(__WIN32__) || defined(__TOS_WIN__) || defined(__WINDOWS__) || (defined(__APPLE__) & defined(__MACH__)))
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#include <cv.h>
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#else
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#include <opencv/cv.h>
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#endif
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#include "cvblob.h"
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namespace cvb
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{
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const char movesE[4][3][4] = { { {-1, -1, 3, CV_CHAINCODE_UP_LEFT }, { 0, -1, 0, CV_CHAINCODE_UP }, { 1, -1, 0, CV_CHAINCODE_UP_RIGHT } },
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{ { 1, -1, 0, CV_CHAINCODE_UP_RIGHT }, { 1, 0, 1, CV_CHAINCODE_RIGHT}, { 1, 1, 1, CV_CHAINCODE_DOWN_RIGHT } },
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{ { 1, 1, 1, CV_CHAINCODE_DOWN_RIGHT}, { 0, 1, 2, CV_CHAINCODE_DOWN }, {-1, 1, 2, CV_CHAINCODE_DOWN_LEFT } },
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{ {-1, 1, 2, CV_CHAINCODE_DOWN_LEFT }, {-1, 0, 3, CV_CHAINCODE_LEFT }, {-1, -1, 3, CV_CHAINCODE_UP_LEFT } }
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};
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const char movesI[4][3][4] = { { { 1, -1, 3, CV_CHAINCODE_UP_RIGHT }, { 0, -1, 0, CV_CHAINCODE_UP }, {-1, -1, 0, CV_CHAINCODE_UP_LEFT } },
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{ {-1, -1, 0, CV_CHAINCODE_UP_LEFT }, {-1, 0, 1, CV_CHAINCODE_LEFT }, {-1, 1, 1, CV_CHAINCODE_DOWN_LEFT } },
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{ {-1, 1, 1, CV_CHAINCODE_DOWN_LEFT }, { 0, 1, 2, CV_CHAINCODE_DOWN }, { 1, 1, 2, CV_CHAINCODE_DOWN_RIGHT } },
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{ { 1, 1, 2, CV_CHAINCODE_DOWN_RIGHT }, { 1, 0, 3, CV_CHAINCODE_RIGHT}, { 1, -1, 3, CV_CHAINCODE_UP_RIGHT } }
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};
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unsigned int cvLabel (IplImage const *img, IplImage *imgOut, CvBlobs &blobs)
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{
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CV_FUNCNAME("cvLabel");
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__CV_BEGIN__;
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{
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CV_ASSERT(img&&(img->depth==IPL_DEPTH_8U)&&(img->nChannels==1));
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CV_ASSERT(imgOut&&(imgOut->depth==IPL_DEPTH_LABEL)&&(img->nChannels==1));
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unsigned int numPixels=0;
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cvSetZero(imgOut);
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CvLabel label=0;
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cvReleaseBlobs(blobs);
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unsigned int stepIn = img->widthStep / (img->depth / 8);
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unsigned int stepOut = imgOut->widthStep / (imgOut->depth / 8);
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unsigned int imgIn_width = img->width;
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unsigned int imgIn_height = img->height;
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unsigned int imgIn_offset = 0;
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unsigned int imgOut_width = imgOut->width;
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unsigned int imgOut_height = imgOut->height;
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unsigned int imgOut_offset = 0;
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if(img->roi)
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{
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imgIn_width = img->roi->width;
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imgIn_height = img->roi->height;
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imgIn_offset = img->roi->xOffset + (img->roi->yOffset * stepIn);
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}
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if(imgOut->roi)
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{
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imgOut_width = imgOut->roi->width;
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imgOut_height = imgOut->roi->height;
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imgOut_offset = imgOut->roi->xOffset + (imgOut->roi->yOffset * stepOut);
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}
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unsigned char *imgDataIn = (unsigned char *)img->imageData + imgIn_offset;
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CvLabel *imgDataOut = (CvLabel *)imgOut->imageData + imgOut_offset;
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#define imageIn(X, Y) imgDataIn[(X) + (Y)*stepIn]
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#define imageOut(X, Y) imgDataOut[(X) + (Y)*stepOut]
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CvLabel lastLabel = 0;
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CvBlob *lastBlob = NULL;
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for (unsigned int y=0; y<imgIn_height; y++)
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{
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for (unsigned int x=0; x<imgIn_width; x++)
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{
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if (imageIn(x, y))
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{
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bool labeled = imageOut(x, y);
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if ((!imageOut(x, y))&&((y==0)||(!imageIn(x, y-1))))
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{
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labeled = true;
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// Label contour.
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label++;
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CV_ASSERT(label!=CV_BLOB_MAX_LABEL);
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imageOut(x, y) = label;
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numPixels++;
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// XXX This is not necessary at all. I only do this for consistency.
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if (y>0)
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imageOut(x, y-1) = CV_BLOB_MAX_LABEL;
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CvBlob *blob = new CvBlob;
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blob->label = label;
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blob->area = 1;
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blob->minx = x; blob->maxx = x;
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blob->miny = y; blob->maxy = y;
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blob->m10=x; blob->m01=y;
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blob->m11=x*y;
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blob->m20=x*x; blob->m02=y*y;
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blob->internalContours.clear();
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blobs.insert(CvLabelBlob(label,blob));
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lastLabel = label;
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lastBlob = blob;
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blob->contour.startingPoint = cvPoint(x, y);
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unsigned char direction=1;
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unsigned int xx = x;
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unsigned int yy = y;
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bool contourEnd = false;
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do
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{
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for (unsigned int numAttempts=0; numAttempts<3; numAttempts++)
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{
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bool found = false;
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for (unsigned char i=0; i<3; i++)
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{
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int nx = xx+movesE[direction][i][0];
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int ny = yy+movesE[direction][i][1];
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if ((nx<imgIn_width)&&(nx>=0)&&(ny<imgIn_height)&&(ny>=0))
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{
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if (imageIn(nx, ny))
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{
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found = true;
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blob->contour.chainCode.push_back(movesE[direction][i][3]);
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xx=nx;
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yy=ny;
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direction=movesE[direction][i][2];
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break;
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}
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else
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{
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imageOut(nx, ny) = CV_BLOB_MAX_LABEL;
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}
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}
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}
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if (!found)
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direction=(direction+1)%4;
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else
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{
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imageOut(xx, yy) = label;
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numPixels++;
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if (xx<blob->minx) blob->minx = xx;
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else if (xx>blob->maxx) blob->maxx = xx;
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if (yy<blob->miny) blob->miny = yy;
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else if (yy>blob->maxy) blob->maxy = yy;
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blob->area++;
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blob->m10+=xx; blob->m01+=yy;
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blob->m11+=xx*yy;
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blob->m20+=xx*xx; blob->m02+=yy*yy;
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break;
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}
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if (contourEnd = ((xx==x) && (yy==y) && (direction==1)))
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break;
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}
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}
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while (!contourEnd);
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}
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if ((y+1<imgIn_height)&&(!imageIn(x, y+1))&&(!imageOut(x, y+1)))
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{
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labeled = true;
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// Label internal contour
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CvLabel l;
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CvBlob *blob = NULL;
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if (!imageOut(x, y))
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{
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/*if (!imageOut(x-1, y))
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{
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cerr << "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" << endl;
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continue;
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}*/
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l = imageOut(x-1, y);
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imageOut(x, y) = l;
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numPixels++;
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if (l==lastLabel)
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blob = lastBlob;
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else
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{
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blob = blobs.find(l)->second;
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lastLabel = l;
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lastBlob = blob;
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}
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blob->area++;
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blob->m10+=x; blob->m01+=y;
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blob->m11+=x*y;
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blob->m20+=x*x; blob->m02+=y*y;
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}
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else
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{
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l = imageOut(x, y);
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if (l==lastLabel)
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blob = lastBlob;
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else
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{
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blob = blobs.find(l)->second;
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lastLabel = l;
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lastBlob = blob;
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}
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}
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// XXX This is not necessary (I believe). I only do this for consistency.
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imageOut(x, y+1) = CV_BLOB_MAX_LABEL;
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CvContourChainCode *contour = new CvContourChainCode;
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contour->startingPoint = cvPoint(x, y);
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unsigned char direction = 3;
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unsigned int xx = x;
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unsigned int yy = y;
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do
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{
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for (unsigned int numAttempts=0; numAttempts<3; numAttempts++)
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{
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bool found = false;
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for (unsigned char i=0; i<3; i++)
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{
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int nx = xx+movesI[direction][i][0];
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int ny = yy+movesI[direction][i][1];
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if (imageIn(nx, ny))
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{
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found = true;
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contour->chainCode.push_back(movesI[direction][i][3]);
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xx=nx;
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yy=ny;
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direction=movesI[direction][i][2];
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break;
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}
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else
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{
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imageOut(nx, ny) = CV_BLOB_MAX_LABEL;
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}
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}
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if (!found)
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direction=(direction+1)%4;
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else
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{
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if (!imageOut(xx, yy))
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{
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imageOut(xx, yy) = l;
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numPixels++;
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blob->area++;
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blob->m10+=xx; blob->m01+=yy;
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blob->m11+=xx*yy;
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blob->m20+=xx*xx; blob->m02+=yy*yy;
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}
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break;
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}
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}
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}
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while (!(xx==x && yy==y));
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blob->internalContours.push_back(contour);
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}
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//else if (!imageOut(x, y))
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if (!labeled)
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{
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// Internal pixel
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CvLabel l = imageOut(x-1, y);
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imageOut(x, y) = l;
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numPixels++;
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CvBlob *blob = NULL;
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if (l==lastLabel)
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blob = lastBlob;
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else
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{
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blob = blobs.find(l)->second;
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lastLabel = l;
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lastBlob = blob;
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}
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blob->area++;
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blob->m10+=x; blob->m01+=y;
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blob->m11+=x*y;
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blob->m20+=x*x; blob->m02+=y*y;
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}
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}
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}
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}
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for (CvBlobs::iterator it=blobs.begin(); it!=blobs.end(); ++it)
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{
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cvCentroid((*it).second);
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(*it).second->u11 = (*it).second->m11 - ((*it).second->m10*(*it).second->m01)/(*it).second->m00;
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(*it).second->u20 = (*it).second->m20 - ((*it).second->m10*(*it).second->m10)/(*it).second->m00;
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(*it).second->u02 = (*it).second->m02 - ((*it).second->m01*(*it).second->m01)/(*it).second->m00;
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double m00_2 = (*it).second->m00 * (*it).second->m00;
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(*it).second->n11 = (*it).second->u11 / m00_2;
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(*it).second->n20 = (*it).second->u20 / m00_2;
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(*it).second->n02 = (*it).second->u02 / m00_2;
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(*it).second->p1 = (*it).second->n20 + (*it).second->n02;
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double nn = (*it).second->n20 - (*it).second->n02;
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(*it).second->p2 = nn*nn + 4.*((*it).second->n11*(*it).second->n11);
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}
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return numPixels;
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}
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__CV_END__;
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}
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void cvFilterLabels(IplImage *imgIn, IplImage *imgOut, const CvBlobs &blobs)
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{
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CV_FUNCNAME("cvFilterLabels");
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__CV_BEGIN__;
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{
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CV_ASSERT(imgIn&&(imgIn->depth==IPL_DEPTH_LABEL)&&(imgIn->nChannels==1));
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CV_ASSERT(imgOut&&(imgOut->depth==IPL_DEPTH_8U)&&(imgOut->nChannels==1));
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int stepIn = imgIn->widthStep / (imgIn->depth / 8);
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int stepOut = imgOut->widthStep / (imgOut->depth / 8);
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int imgIn_width = imgIn->width;
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int imgIn_height = imgIn->height;
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int imgIn_offset = 0;
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int imgOut_width = imgOut->width;
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int imgOut_height = imgOut->height;
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int imgOut_offset = 0;
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if(imgIn->roi)
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{
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imgIn_width = imgIn->roi->width;
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imgIn_height = imgIn->roi->height;
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imgIn_offset = imgIn->roi->xOffset + (imgIn->roi->yOffset * stepIn);
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}
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if(imgOut->roi)
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{
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imgOut_width = imgOut->roi->width;
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imgOut_height = imgOut->roi->height;
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imgOut_offset = imgOut->roi->xOffset + (imgOut->roi->yOffset * stepOut);
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}
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char *imgDataOut=imgOut->imageData + imgOut_offset;
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CvLabel *imgDataIn=(CvLabel *)imgIn->imageData + imgIn_offset;
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for (unsigned int r=0;r<(unsigned int)imgIn_height;r++,
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imgDataIn+=stepIn,imgDataOut+=stepOut)
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{
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for (unsigned int c=0;c<(unsigned int)imgIn_width;c++)
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{
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if (imgDataIn[c])
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{
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if (blobs.find(imgDataIn[c])==blobs.end()) imgDataOut[c]=0x00;
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else imgDataOut[c]=(char)0xff;
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}
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else
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imgDataOut[c]=0x00;
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}
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}
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}
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__CV_END__;
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}
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CvLabel cvGetLabel(IplImage const *img, unsigned int x, unsigned int y)
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{
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CV_FUNCNAME("cvGetLabel");
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__CV_BEGIN__;
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{
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CV_ASSERT(img&&(img->depth==IPL_DEPTH_LABEL)&&(img->nChannels==1));
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int step = img->widthStep / (img->depth / 8);
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int img_width = 0;
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int img_height= 0;
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int img_offset = 0;
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if(img->roi)
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{
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img_width = img->roi->width;
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img_height = img->roi->height;
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img_offset = img->roi->xOffset + (img->roi->yOffset * step);
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}
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else
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{
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img_width = img->width;
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img_height= img->height;
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}
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CV_ASSERT((x>=0)&&(x<img_width)&&(y>=0)&&(y<img_height));
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return ((CvLabel *)(img->imageData + img_offset))[x + y*step];
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}
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__CV_END__;
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}
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}
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