Revision history [back]

I am not able detect all occurrence of template image from source image. Please look attache below file and code for the same.

source Image: C:\fakepath\sugarcrm_sour orignal.JPGC:\fakepath\source.JPG

Template Image: C:\fakepath\sugarcrm_edit.jpgC:\fakepath\target.jpg

In the source image there are 3 occurrence of template but matchTemplate API give only two( first and third). The second occurrence not found with 0.98 threshold. I can found the second occurrence with 0.8 threshold.

Can you help me what the wrong with below code?

How detect with all 3 occurrence with 0.98 threshold?

    cv::Mat ref = cv::imread("source.JPG");
    cv::Mat tpl = cv::imread("template.jpg")

    cv::Mat gref, gtpl;
    cv::cvtColor(ref, gref, CV_BGR2GRAY);
    cv::cvtColor(tpl, gtpl, CV_BGR2GRAY);

    cv::Mat res(ref.rows - tpl.rows + 1, ref.cols - tpl.cols + 1, CV_32FC1);
    cv::matchTemplate(gref, gtpl, res, CV_TM_CCOEFF_NORMED);    

    double THRESHOLD = 0.98;

    while (true)
    {
        double minval, maxval;
        cv::Point minloc, maxloc;
        cv::minMaxLoc(res, &minval, &maxval, &minloc, &maxloc);

        if (maxval >= THRESHOLD)
        {
            cv::rectangle(ref,maxloc,cv::Point(maxloc.x + tpl.cols, maxloc.y + tpl.rows),CV_RGB(0, 255, 0), 2);
            cv::floodFill(res, maxloc, cv::Scalar(0), 0, cv::Scalar(.1), cv::Scalar(1.));               
        }
        else
            break;
    }

    cv::imshow("result", ref);
    cv::waitKey();

• Thanks

I am not able detect all occurrence of template image from source image. Please look attache below file and code for the same.

source Image: C:\fakepath\source.JPG

Template Image: C:\fakepath\target.jpg

In the source image there are 3 occurrence of template but matchTemplate API give only two( first and third). The second occurrence not found with 0.98 threshold. I can found the second occurrence with 0.8 threshold.

Can you help me what the wrong with below code?

How detect with all 3 occurrence with 0.98 threshold?

    cv::Mat ref = cv::imread("source.JPG");
    cv::Mat tpl = cv::imread("template.jpg")

    cv::Mat gref, gtpl;
    cv::cvtColor(ref, gref, CV_BGR2GRAY);
    cv::cvtColor(tpl, gtpl, CV_BGR2GRAY);

    cv::Mat res(ref.rows - tpl.rows + 1, ref.cols - tpl.cols + 1, CV_32FC1);
    cv::matchTemplate(gref, gtpl, res, CV_TM_CCOEFF_NORMED);    

    double THRESHOLD = 0.98;

    while (true)
    {
        double minval, maxval;
        cv::Point minloc, maxloc;
        cv::minMaxLoc(res, &minval, &maxval, &minloc, &maxloc);

        if (maxval >= THRESHOLD)
        {
            cv::rectangle(ref,maxloc,cv::Point(maxloc.x + tpl.cols, maxloc.y + tpl.rows),CV_RGB(0, 255, 0), 2);
            cv::floodFill(res, maxloc, cv::Scalar(0), 0, cv::Scalar(.1), cv::Scalar(1.));               
        }
        else
            break;
    }

    cv::imshow("result", ref);
    cv::waitKey();

• Thanks

I am not able detect all occurrence of template image from source image. Please look attache below file and code for the same.

source Image: C:\fakepath\source.JPG

Template Image: C:\fakepath\target.jpg

In the source image there are 3 occurrence of template but matchTemplate API give only two( first and third). The second occurrence not found with 0.98 threshold. I can found the second occurrence with 0.8 threshold.

Can you help me what the wrong with below code?

How detect with all 3 occurrence with 0.98 threshold?

    cv::Mat ref = cv::imread("source.JPG");
    cv::Mat tpl = cv::imread("template.jpg")

    cv::Mat gref, gtpl;
    cv::cvtColor(ref, gref, CV_BGR2GRAY);
    cv::cvtColor(tpl, gtpl, CV_BGR2GRAY);

    cv::Mat res(ref.rows - tpl.rows + 1, ref.cols - tpl.cols + 1, CV_32FC1);
    cv::matchTemplate(gref, gtpl, res, CV_TM_CCOEFF_NORMED);    

    double THRESHOLD = 0.98;

    while (true)
    {
        double minval, maxval;
        cv::Point minloc, maxloc;
        cv::minMaxLoc(res, &minval, &maxval, &minloc, &maxloc);

        if (maxval >= THRESHOLD)
        {
            cv::rectangle(ref,maxloc,cv::Point(maxloc.x + tpl.cols, maxloc.y + tpl.rows),CV_RGB(0, 255, 0), 2);
            cv::floodFill(res, maxloc, cv::Scalar(0), 0, cv::Scalar(.1), cv::Scalar(1.));               
        }
        else
            break;
    }

    cv::imshow("result", ref);
    cv::waitKey();

• Thanks

I am using method CV_TM_CCORR_NORMED, which is working fine with most of the examples. But not working in few. few. using match-percentage/threshold 99%. see below screen, finding folder img, but it also gives false images.

source img - C:\fakepath\Capture.PNG target img - C:\fakepath\target.png output - C:\fakepath\folderSearch.JPG

I am not able detect all occurrence of template image from source image. Please look attache below file and code for the same.

source Image: C:\fakepath\source.JPG

Template Image: C:\fakepath\target.jpg

In the source image there are 3 occurrence of template but matchTemplate API give only two( first and third). The second occurrence not found with 0.98 threshold. I can found the second occurrence with 0.8 threshold.

Can you help me what the wrong with below code?

How detect with all 3 occurrence with 0.98 threshold?

    cv::Mat ref = cv::imread("source.JPG");
    cv::Mat tpl = cv::imread("template.jpg")

    cv::Mat gref, gtpl;
    cv::cvtColor(ref, gref, CV_BGR2GRAY);
    cv::cvtColor(tpl, gtpl, CV_BGR2GRAY);

    cv::Mat res(ref.rows - tpl.rows + 1, ref.cols - tpl.cols + 1, CV_32FC1);
    cv::matchTemplate(gref, gtpl, res, CV_TM_CCOEFF_NORMED);    

    double THRESHOLD = 0.98;

    while (true)
    {
        double minval, maxval;
        cv::Point minloc, maxloc;
        cv::minMaxLoc(res, &minval, &maxval, &minloc, &maxloc);

        if (maxval >= THRESHOLD)
        {
            cv::rectangle(ref,maxloc,cv::Point(maxloc.x + tpl.cols, maxloc.y + tpl.rows),CV_RGB(0, 255, 0), 2);
            cv::floodFill(res, maxloc, cv::Scalar(0), 0, cv::Scalar(.1), cv::Scalar(1.));               
        }
        else
            break;
    }

    cv::imshow("result", ref);
    cv::waitKey();

• Thanks

Case 1- I am using method CV_TM_CCORR_NORMED, which is working fine with most of the examples. But not working in few. using match-percentage/threshold 99%. see below screen, finding folder img, but it also gives false images.

source img - C:\fakepath\Capture.PNG target img - C:\fakepath\target.png output - C:\fakepath\folderSearch.JPG

I am not able detect all occurrence of template image from source image. Please look attache below file and code for the same.

source Image: C:\fakepath\source.JPG

Template Image: C:\fakepath\target.jpg

In the source image there are 3 occurrence of template but matchTemplate API give only two( first and third). The second occurrence not found with 0.98 threshold. I can found the second occurrence with 0.8 threshold.

Can you help me what the wrong with below code?

How detect with all 3 occurrence with 0.98 threshold?

    cv::Mat ref = cv::imread("source.JPG");
    cv::Mat tpl = cv::imread("template.jpg")

    cv::Mat gref, gtpl;
    cv::cvtColor(ref, gref, CV_BGR2GRAY);
    cv::cvtColor(tpl, gtpl, CV_BGR2GRAY);

    cv::Mat res(ref.rows - tpl.rows + 1, ref.cols - tpl.cols + 1, CV_32FC1);
    cv::matchTemplate(gref, gtpl, res, CV_TM_CCOEFF_NORMED);    

    double THRESHOLD = 0.98;

    while (true)
    {
        double minval, maxval;
        cv::Point minloc, maxloc;
        cv::minMaxLoc(res, &minval, &maxval, &minloc, &maxloc);

        if (maxval >= THRESHOLD)
        {
            cv::rectangle(ref,maxloc,cv::Point(maxloc.x + tpl.cols, maxloc.y + tpl.rows),CV_RGB(0, 255, 0), 2);
            cv::floodFill(res, maxloc, cv::Scalar(0), 0, cv::Scalar(.1), cv::Scalar(1.));               
        }
        else
            break;
    }

    cv::imshow("result", ref);
    cv::waitKey();

• Thanks

Case 1- I am using method CV_TM_CCORR_NORMED, which is working fine with most of the examples. But not working in few. using match-percentage/threshold 99%. see below screen, finding folder img, but it also gives false images.

source img - C:\fakepath\Capture.PNG target img - C:\fakepath\target.png output - C:\fakepath\folderSearch.JPG

Case 2-

Not finding the target img if source img is 75% of original img. using CV_TM_CCORR_NORMED, img open mode is IMREAD_COLOR. code using same that i posted, threshold is 95%.

source img - C:\fakepath\inflow75.PNG target img - C:\fakepath\target.png

I am not able detect all occurrence of template image from source image. Please look attache below file and code for the same.

source Image: C:\fakepath\source.JPG

Template Image: C:\fakepath\target.jpg

In the source image there are 3 occurrence of template but matchTemplate API give only two( first and third). The second occurrence not found with 0.98 threshold. I can found the second occurrence with 0.8 threshold.

Can you help me what the wrong with below code?

How detect with all 3 occurrence with 0.98 threshold?

    cv::Mat ref = cv::imread("source.JPG");
    cv::Mat tpl = cv::imread("template.jpg")

    cv::Mat gref, gtpl;
    cv::cvtColor(ref, gref, CV_BGR2GRAY);
    cv::cvtColor(tpl, gtpl, CV_BGR2GRAY);

    cv::Mat res(ref.rows - tpl.rows + 1, ref.cols - tpl.cols + 1, CV_32FC1);
    cv::matchTemplate(gref, gtpl, res, CV_TM_CCOEFF_NORMED);    

    double THRESHOLD = 0.98;

    while (true)
    {
        double minval, maxval;
        cv::Point minloc, maxloc;
        cv::minMaxLoc(res, &minval, &maxval, &minloc, &maxloc);

        if (maxval >= THRESHOLD)
        {
            cv::rectangle(ref,maxloc,cv::Point(maxloc.x + tpl.cols, maxloc.y + tpl.rows),CV_RGB(0, 255, 0), 2);
            cv::floodFill(res, maxloc, cv::Scalar(0), 0, cv::Scalar(.1), cv::Scalar(1.));               
        }
        else
            break;
    }

    cv::imshow("result", ref);
    cv::waitKey();

• Thanks

Case 1- I am using method CV_TM_CCORR_NORMED, which is working fine with most of the examples. But not working in few. using match-percentage/threshold 99%. see below screen, finding folder img, but it also gives false images.

source img - C:\fakepath\Capture.PNG target img - C:\fakepath\target.png output - C:\fakepath\folderSearch.JPG

Case 2-

Not finding the target img if source img is 75% of original img. using CV_TM_CCORR_NORMED, img open mode is IMREAD_COLOR. code using same that i posted, threshold is 95%.

source img - C:\fakepath\inflow75.PNG target img - C:\fakepath\target.png