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i imported only face detection sample,after i imported opencv4android directory ,and i do these work ,it worked correctly;

1)i downloaded OpenCV-2.4.9-android-sdk;

2)c/c++ build i setted ${NDKROOT}/ndk-build

3)i set NDKROOT system varrible;

4)goto Preference → Android → NDK and i choosed my ndk location

4)c/c++ build >ToolChain Editor i seted current builder =android builder

5)i too installed opencv manager

6)i installed CDT plugin

i may have renamed the project, and the eclipse forgot to rename the "Refresh Policy".

Just update "Project properties -> C/C++ Build -> Refresh Policy" manually solved my problem.

but it have previous errors?

description Resource Path Location Type * Android NDK: Aborting. . Stop. OpenCV Sample - face-detection line 155, external location: K:\android-ndk-r10b\build\core\build-local.mk C/C++ Problem

after this i setted Project Properties>C/C++ Build

(uncheck) use default build command
Build command: ndk-build
(uncheck) generate Makefiles automatically

now it has these errors

Description Resource Path Location Type * Android NDK: Aborting. . Stop. OpenCV Sample - face-detection line 155, external location: K:\android-ndk-r10b\build\core\build-local.mk C/C++ Problem

after this problem i went to Project Properties>C/C++ Build>Tool Chain Editor and i setted Current toolchain: Android GCC Current builder: Android Builder now we have this errors
Errors running builder 'CDT Builder' on project 'OpenCV Sample - face-detection'.

hi my friends,i use opencv library for android,i run other sample opencv successfully but for Sample - face-detection this have a message "Could not find OpenCV Sample - face-detection.apk! "; i seted opencv in eclipse according below:

1)i downloaded OpenCV-2.4.9-android-sdk;

2)c/c++ build i setted ${NDKROOT}/ndk-build

3)i set NDKROOT system varrible;

4)goto Preference → Android → NDK and i choosed my ndk location

4)c/c++ build >ToolChain Editor i seted current builder =android builder

5)i too installed opencv manager

6)i installed CDT plugin

please help me

finally i succeed,i first for PDB errors tools>option>debugging>outputwindow>moduleloadmessage >off and then i tools>option>debugging>symbols>microsoft symbols server not checked and then i chnge capture.open( -1 ); to capture.open( 0 ); now by seting in opencv itworks,thanks very much

finally i succeed,i first for PDB errors tools>option>debugging>outputwindow>moduleloadmessage >off and then i tools>option>debugging>symbols>microsoft symbols server not checked and then i chnge capture.open( -1 ); to capture.open( 0 ); now by seting in opencv itworks,thanks very much

finally i succeed,i first for PDB errors tools>option>debugging>outputwindow>moduleloadmessage >off and then i tools>option>debugging>symbols>microsoft symbols server not checked and then i chnge capture.open( -1 ); to capture.open( 0 ); now by seting in opencv itworks,thanks very much

it in opnencv 3,but this is in opencv2.4.9

i use pre-build opencv 2.4.9 i test the image show in opencv 2.4.9 it works,but for this source its have error?! if this errors is that i use pre-build opencv?what to do what not to do copy the xml file in current folder and my hardware corei5,Radeon ATI graphic

#include <opencv/cv.h>
#include <opencv/highgui.h>
#include <opencv/ml.h>

void doMosaic(IplImage* in, int x, int y,
              int width, int height, int size);

int main (int argc, char **argv)
    {
    int i, c;
    IplImage *src_img = 0, *src_gray = 0;
    const char *cascade_name = "haarcascade_frontalface_alt.xml";
    CvHaarClassifierCascade *cascade = 0;
    CvMemStorage *storage = 0;
    CvSeq *faces;

    cascade = (CvHaarClassifierCascade *) cvLoad (cascade_name, 0, 0, 0);
    cvNamedWindow ("Capture", CV_WINDOW_AUTOSIZE);
    CvCapture *capture = cvCreateCameraCapture(0);
    assert(capture != NULL);

    while (1) {
        src_img = cvQueryFrame (capture);
        src_gray = cvCreateImage (cvGetSize(src_img), IPL_DEPTH_8U, 1);

        storage = cvCreateMemStorage (0);
        cvClearMemStorage (storage);
        cvCvtColor (src_img, src_gray, CV_BGR2GRAY);
        cvEqualizeHist (src_gray, src_gray);

        faces = cvHaarDetectObjects (src_gray, cascade, storage,
            1.11, 4, 0, cvSize (40, 40));
        for (i = 0; i < (faces ? faces->total : 0); i++) {
            CvRect *r = (CvRect *) cvGetSeqElem (faces, i);
            doMosaic(src_img, r->x, r->y, r->width, r->height, 20);
            }

        cvShowImage("Capture", src_img);
        cvReleaseImage(&src_gray);

        c = cvWaitKey (2);
        if (c == '\x1b')
            break;
        }

    cvReleaseCapture (&capture);
    cvDestroyWindow ("Capture");

    return 0;
    }

void doMosaic(IplImage* in, int x0, int y0,
              int width, int height, int size)
    {
    int b, g, r, col, row;

    int xMin = size*(int)floor((double)x0/size);
    int yMin = size*(int)floor((double)y0/size);
    int xMax = size*(int)ceil((double)(x0+width)/size);
    int yMax = size*(int)ceil((double)(y0+height)/size);

    for(int y=yMin; y<yMax; y+=size){
        for(int x=xMin; x<xMax; x+=size){
            b = g = r = 0;
            for(int i=0; i<size; i++){
                if( y+i > in->height ){
                    break;
                    }
                row = i;
                for(int j=0; j<size; j++){
                    if( x+j > in->width ){
                        break;
                        }
                    b += (unsigned char)in->imageData[in->widthStep*(y+i)+(x+j)*3];
                    g += (unsigned char)in->imageData[in->widthStep*(y+i)+(x+j)*3+1];
                    r += (unsigned char)in->imageData[in->widthStep*(y+i)+(x+j)*3+2];
                    col = j;
                    }
                }
            row++;
            col++;
            for(int i=0;i<row;i++){
                for(int j=0;j<col;j++){
                    in->imageData[in->widthStep*(y+i)+(x+j)*3]   = cvRound((double)b/(row*col));
                    in->imageData[in->widthStep*(y+i)+(x+j)*3+1] = cvRound((double)g/(row*col));
                    in->imageData[in->widthStep*(y+i)+(x+j)*3+2] = cvRound((double)r/(row*col));
                    }
                }
            }
        }
    }

the error is a break in microsoft ,please help me.thanks very much

First-chance exception at 0x75C4B727 in opencv.exe: Microsoft C++ exception: cv::Exception at memory location 0x003CF678.

If there is a handler for this exception, the program may be safely continued.

by set microsft symbol serveor warning solved but yet my webcam dont work!!!

i created new ask,for that this problem is related pre-built but answers this is not related to prebuilt link text

i am sure set opencv in vs2012 correctly why dont work?

finally i succeed,i first for PDB errors tools>option>debugging>outputwindow>moduleloadmessage >off and then i tools>option>debugging>symbols>microsoft symbols server not checked and then i chnge capture.open( -1 ); to capture.open( 0 ); now by seting in opencv itworks,thanks very much stackprogramer (just now)edit

i asked this before please go to this my question

http://answers.opencv.org/question/66...

thanks very much

your talk means that my program that use object detection by classifer adaboost alogorithm and use webcam should work?

now i see in open cv docs

Note

To use the OpenCV library you have two options: Installation by Using the Pre-built Libraries or Installation by Making Your Own Libraries from the Source Files. While the first one is easier to complete, it only works if you are coding with the latest Microsoft Visual Studio IDE and doesn’t take advantage of the most advanced technologies we integrate into our library.

i guees that i should not use pre-build opencv i should use making opencv thanks very much my friend

i use pre-built opencv and my program not have any error but it dosn't work! it warning cant find PDB file,its for debugging and not influence in execution program. for not have this warning i go tools>options>debugger>checked microsoft symbol server warning now not have but it dosent work?!

hi to my dear friend,in docs opencv write that

Note To use the OpenCV library you have two options: Installation by Using the Pre-built Libraries or Installation by Making Your Own Libraries from the Source Files. While the first one is easier to complete, it only works if you are coding with the latest Microsoft Visual Studio IDE and doesn’t take advantage of the most advanced technologies we integrate into our library.

whats means most advanced technology in the quotation?

my question is in pre-built method i use full of ability opencv or i should use making opencv myself????? for example i use pre-built but the object recognition in webcam don't work???

please guided me ,thanks very much

yes,same problem i examine configure vs 2012 tomorrow ,and i add comment result;thanks for replay

thanks for replay,i test the image show open cv sample in s2012 it worked but this source not work

yes,my laptop have webcam,i change it,the console opened and not closed,i test for show image i show image with opencv,but for this source have errors,this source is test in linux on opencv doc,but for win is not work,thanks for reply and attention to my question

thanks very much,yes,debuger is in line

if ( ! capture.isOpened() ) { printf("--(!)Error opening video capture\n"); return -1; }

stop

i use full path,th message video source window opened when i applayed it closed! the picture i added question see please

thanks for replay,but i configured the .xml file in the path project,