Kailash's profile - activity

Extract text and bounding-box using OpenCV I am trying to find the bounding boxes (rectangles) of text in an image. So,

Extract text and bounding-box using OpenCV I am trying to find the bounding boxes (rectangles) of text in an image. So,

Extract text and bounding-box using OpenCV I am trying to find the bounding boxes (rectangles) of text in an image. So,

Extract text and bounding-box using OpenCV I am trying to find the bounding boxes (rectangles) of text in an image. So,

Great work till date. I tested the on bunch of 22 samples and each sample is further have 2 images at 25% zoom out and z

Thanks Laurent, it is working on given image. But on some images its not working, in which earlier working. I can share

output - 20180321.2011 - C:\fakepath\BergersAlgo.PNG I tried the recent code posted here. Target was not found, I atta

output - 20180321.2011 - C:\fakepath\BergersAlgo.PNG I tried the recent code posted here. Target was not found, I atta

Why OpenCV matchTemplate API not detect all occurrence of image? I am not able detect all occurrence of template image f

yes I am linking release lib in debug.

Same error - Exception thrown at 0x02B00F73 (opencv_core341.dll) in Automation.ImageAlgorithmEXE.exe: 0xC0000005: Acce

Same error - Exception thrown at 0x02B00F73 (opencv_core341.dll) in Automation.ImageAlgorithmEXE.exe: 0xC0000005: Acce

Same error - Exception thrown at 0x02B00F73 (opencv_core341.dll) in Automation.ImageAlgorithmEXE.exe: 0xC0000005: Acce

Same error - Exception thrown at 0x02B00F73 (opencv_core341.dll) in Automation.ImageAlgorithmEXE.exe: 0xC0000005: Acce

Same error Exception thrown at 0x02B00F73 (opencv_core341.dll) in Automation.ImageAlgorithmEXE.exe: 0xC0000005: Access

crashing on using vector on this line (cv::split(pen, tplPlane);) If changed to Mat array, it works. Error - Exception

crashing on using vector on this line (cv::split(pen, tplPlane);) If changed to Mat array, it works. Error - Exception t

crashing on using vector on this line (cv::split(pen, tplPlane);) If changed to Mat array, it works.

I tried this code, also updates. Running on Case 2, but not able to find the target images. also cv::split function is c

I tried this code, also updates. Running on Case 2, but not able to find the target images. also cv::split function is c

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

output - 20180321.2011 - C:\fakepath\BergersAlgo.PNG

I tried the recent code posted here. Target was not found, I attached the screen.

Why OpenCV matchTemplate API not detect all occurrence of image? I am not able detect all occurrence of template image f

Thanks Laurent, One case I found in which target img not found. please find "Case 2", I posted in question block.

Why OpenCV matchTemplate API not detect all occurrence of image? I am not able detect all occurrence of template image f

Why OpenCV matchTemplate API not detect all occurrence of image? I am not able detect all occurrence of template image f

I update the question at end, Pls suggest on Folder img search example.

Why OpenCV matchTemplate API not detect all occurrence of image? I am not able detect all occurrence of template image f

Why OpenCV matchTemplate API not detect all occurrence of image? I am not able detect all occurrence of template image f

Why OpenCV matchTemplate API not detect all occurrence of image? I am not able detect all occurrence of template image f