[28] | 1 | // facedet.c - by Robin Hewitt, 2007 |
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| 2 | // http://www.cognotics.com/opencv/downloads/camshift_wrapper |
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| 3 | // This is free software. See License.txt, in the download |
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| 4 | // package, for details. |
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| 5 | // |
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| 6 | |
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| 7 | #include "cv.h" |
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| 8 | #include <stdio.h> |
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| 9 | #include "facedet.h" |
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| 10 | |
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| 11 | |
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| 12 | // File-level variables |
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| 13 | CvHaarClassifierCascade * pCascade = 0; // the face detector |
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| 14 | CvMemStorage * pStorage = 0; // memory for detector to use |
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| 15 | CvSeq * pFaceRectSeq; // memory-access interface |
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| 16 | |
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| 17 | |
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| 18 | ////////////////////////////////// |
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| 19 | // initFaceDet() |
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| 20 | // |
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| 21 | int initFaceDet(const char * haarCascadePath) |
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| 22 | { |
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| 23 | if( !(pStorage = cvCreateMemStorage(0)) ) |
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| 24 | { |
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| 25 | fprintf(stderr, "Can\'t allocate memory for face detection\n"); |
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| 26 | return 0; |
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| 27 | } |
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| 28 | |
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| 29 | pCascade = (CvHaarClassifierCascade *)cvLoad( haarCascadePath, 0, 0, 0 ); |
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| 30 | if( !pCascade ) |
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| 31 | { |
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| 32 | fprintf(stderr, "Can\'t load Haar classifier cascade from\n" |
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| 33 | " %s\n" |
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| 34 | "Please check that this is the correct path\n", |
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| 35 | haarCascadePath); |
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| 36 | return 0; |
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| 37 | } |
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| 38 | |
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| 39 | return 1; |
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| 40 | } |
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| 41 | |
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| 42 | |
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| 43 | ////////////////////////////////// |
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| 44 | // closeFaceDet() |
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| 45 | // |
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| 46 | void closeFaceDet() |
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| 47 | { |
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| 48 | if(pCascade) cvReleaseHaarClassifierCascade(&pCascade); |
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| 49 | if(pStorage) cvReleaseMemStorage(&pStorage); |
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| 50 | } |
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| 51 | |
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| 52 | |
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| 53 | ////////////////////////////////// |
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| 54 | // detectFace() |
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| 55 | // |
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| 56 | CvRect * detectFace(IplImage * pImg) |
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| 57 | { |
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| 58 | CvRect* r = 0; |
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| 59 | |
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| 60 | // detect faces in image |
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| 61 | int minFaceSize = pImg->width / 5; |
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| 62 | pFaceRectSeq = cvHaarDetectObjects |
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| 63 | (pImg, pCascade, pStorage, |
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| 64 | 1.1, // increase search scale by 10% each pass |
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| 65 | 6, // require six neighbors |
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| 66 | CV_HAAR_DO_CANNY_PRUNING, // skip regions unlikely to contain a face |
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| 67 | cvSize(minFaceSize, minFaceSize)); |
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| 68 | |
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| 69 | // if one or more faces are detected, return the first one |
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| 70 | if( pFaceRectSeq && pFaceRectSeq->total ) |
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| 71 | r = (CvRect*)cvGetSeqElem(pFaceRectSeq, 0); |
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| 72 | |
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| 73 | return r; |
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| 74 | } |
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| 75 | |
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| 76 | |
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| 77 | |
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