123ezone's profile - activity

This is my main program that I wrote to rotate character slant manually(at run time) by using shearing algorithm. This is a console application and I don't know how can I do the same task using windows forms application. The problem occurred since the console app create track bar using cvCreateTrackbar() function and now I need to do it in another form. Please can anyone help me?

        IplImage* img;
        IplImage* rotated_img;
        int trackCount = 0;
        cvNamedWindow("MyWindow");
        cvCreateTrackbar("Angle", "MyWindow", &trackCount, 500, 0);

      while(true){
          //load the original image
          img = cvLoadImage("Original.jpg");

          //rotate the image
          rotated_img=SlantCorrection(img,trackCount);

          //display the rotated image
          cvShowImage("MyWindow", rotated_img);

          //clean up
          cvReleaseImage(&img);
          cvReleaseImage(&rotated_img);

          //if user press 'ESC' button, program quit the while loop
          int c=cvWaitKey(50);              
          if(c==27) break;
      }

      int height=rotated_img->height;
      int *linecount = new int[height];
      int width=rotated_img->width;
      int *wordcount = new int[width];

      int count=0;
      int countPositions=0;
      int *pos = new int[height];
      Horizontal_projection(rotated_img,width,height,countPositions,pos);
      count = Vertical_Projection(width,height);

      cvDestroyWindow("MyWindow");

      return 0;

Thank You !

I I have a doubt that can we convert binary image again to a gray scale image. Is there any methods or can we use cvCvtColor() and do that task. Thanks.

I'm trying to remove slant of cursive text by using shearing transformation. Can someone tell me where I can find any tutorials regarding shear transformation in opencv or solution for that. Thank You Very much !

When we want to crop a section from an image what we normally use is cvSetImageROI() method and pass a rectangle as a parameter. In my case, I want to crop a rhombus from an image so that I have to pass a rhombus as the parameter. So I need to know how to draw a rhombus in opencv. Can someone help me with this problem. Thank You !

std::vector<cv::Point> points;

cv::Mat_<uchar>::iterator it = img.begin<uchar>();

cv::Mat_<uchar>::iterator end = img.end<uchar>();

for (; it != end; ++it)

if (*it)

points.push_back(it.pos());

Can someone help me with converting this into opencv version 2.4.3. I have tried that but it didn't work.

Thank You!

Hi, I'm Trying to correct slant of cursive handwritten characters before do the segmentation.What I need is to rotate the letters so they are upright. Can someone please help with opencv code to find a solution. Thank You very much !

I have done a OCR application for handwritten normal characters.For the segmentation of characters I have used histogram profile method. That successfully works for normal English characters.

I have used horizontal projection for line segmentation and vertical projection for character segmentation.

To segment lines of cursive hand written article I can use horizontal projection as previous. But I can't use same methodology for cursive English character segmentation since they are merged each other and also slanted. Can anyone please help me with a way to segment cursive characters.Thank You very much.

            for(int i=22; i<24; i++){
            IplImage *img = cvLoadImage("%d.jpg",i);
            }

Please tell me how can I Load set of images from project file.It works for loading one image but when I code it like this it do not work.Please help me for load the set of images in a loop.

Hi, I am doing OCR application using opencv 2.4.3 in visual c++ windows forms(visual studio 2010 ultimate). I did this OCR application as a c++ console application and it works fine. But when I was converting it to windows forms it gives this error.

Error 1 error LNK2001: unresolved external symbol "public: virtual void __thiscall cv::HOGDescriptor::setSVMDetector(class cv::_InputArray const &)" (?setSVMDetector@HOGDescriptor@cv@@UAEXABV_InputArray@2@@Z)

Can someone help me to fix this error.I have no idea of correcting that error.I used same additional libraries which I used for console application here also.Thank You

I have converted a console application of a OCR application to a windows form application.The program runs accurately on console application but after converting it gives error for the vector that I have used to store image set.I have changed the configuration properties to Common Language Runtime Support (/clr) and I changed the header file cliext since clr does not support for std/vector. This is my code.But still it has errors.

ref class Segmentation { public:
    IplImage *PreprocessedImage;
    cliext::vector<IplImage *> Lineimgs;
    cliext::vector<IplImage *> Characterimgs;
    Segmentation(IplImage *);
    ~Segmentation(void);
    IplImage* Resize(IplImage *);
    void Horizontal_projection(int,int,int,int
*);
    int Vertical_Projection(int,int); };``

Error is, Error 1 error C3225: generic type argument for 'TValue' cannot be '_IplImage *', it must be a value type or a handle to a reference type C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\cliext\vector 14 1 Prototype 3

Please help me with this problem.Thank You

I want to create an image array using IplImage.Here is my code for that.But it provides some memory leaks.Please help me with this to solve this problem.

    IplImage *result[200];  
    for(int i=0;i<160;i++)
{
    result[i]=cvCreateImage(cvGetSize(Segimg), 8, 1);
}
    *result=method();

cvNamedWindow("B:");
cvShowImage("B:", result[1]);
cvWaitKey(0);
cvDestroyWindow("B:");

cvReleaseImage(&result[1]);

I have segmented normal characters using horizontal and vertical projection. Now I'm trying to segment cursive characters. I have no idea of segmenting cursive characters since they are slanted. Please help me with this problem. Thank You.

I want to get the skeleton image of a character and I have tried that from OpenCV.But it runs a never ending loop.Please help me with this.Here is my code.Thanks.

bool done;
IplConvKernel* element = cvCreateStructuringElementEx( 3, 3,0, 0, CV_SHAPE_CROSS, NULL );
do
{
    cvErode(gray,erode,element,1);
    cvDilate(erode,temp,element,1);
    cvAbsDiff(gray,temp,temp);
    cvOr(skel,temp,skel,NULL);
    cvCopy(erode, gray, NULL);
done = (cvCountNonZero(gray) == 0);
} while (!done);