AlecTheLion's profile - activity

I am also having the same issue, does anybody know?

any ideas?

Hi guys,

So I recently wrote an OpenCV application to apply a filter to an image. I now want to port this to iOS so I can see the performance on a mobile device. So I created a new iOS application. Changed all of the file extensions from .h to .hpp and from .m to .mm as advised. I also downloaded the opencv2.framework file so that I could add that to Link Binary with Libraries (done). I then added the search paths:

Framework Search Paths: /usr/local/lib
Header Search Paths: /usr/local/include
Library Search Paths: <path to OpenCV lib>

not sure if the last one is correct, I used the OpenCV version I was using for my command line application. I thought using the .framework file was probably wrong?

Anyway I'm not sure what to do now as I'm still getting the error:

please can someone help me to understand what I need to achieve in order to correctly link the framework so I can begin using it in my mobile application.

Thank you, Alec.

This is really amazing! thank you so much for your help.

Sorry what do you mean by this? is it fixed if I'm using Mat intensityLUT(im.rows,im.cols,CV_8UC1); as per the example below?

A while back I followed a tutorial (or maybe an answer from another question or something) on how to apply an oil painting filter (http://jsfiddle.net/loktar/96arS/) to an image and write it to a canvas using javascript. Now I want to achieve the same effect using openCV and C++.

I was also using: http://supercomputingblog.com/graphic... as a reference for the psuedo-code.

So far I am as far as reading the image and iterating through the pixels and finding the intensity values.

int main()
{
    Mat im = imread(...);
    Mat outline;
    Mat paint;

    int intensityLUT[im.rows][im.cols];
    int rgbLUT[im.rows][im.cols][3]; //r/g/b
    int intensity = 20;
    int radius = 3;
    int pixelIntensityValue[100];
    int pixelIntensityCount[100][4];

    for(int y = 0; y < im.rows; y++)
    {
        for (int x = 0; x < im.cols; x++)
        {
            int r = im.at<cv::Vec3b>(y,x)[0];
            int g = im.at<cv::Vec3b>(y,x)[1];
            int b = im.at<cv::Vec3b>(y,x)[2];

            intensityLUT[y][x] = round(  ((r+g+b)/3)  * intensity/255);

            rgbLUT[y][x][0] = r;
            rgbLUT[y][x][1] = g;
            rgbLUT[y][x][2] = b;

        }
    } //first itteration to get rgb values

    for(int y = 0; y < im.rows; y++)
    {
        for (int x = 0; x < im.cols; x++) //for each pixel
        {
            for(int yy = -radius; yy <= radius; yy++)
            {
                for(int xx = -radius; xx <= radius; xx++)
                {
                    if(y + yy > 0 && y+yy < im.rows && x+xx > 0 && x+xx < im.cols)
                    {
                        int intensityVal = intensityLUT[y+yy][x+xx];
                        pixelIntensityCount[intensityVal][0] ++; // priority
                        pixelIntensityCount[intensityVal][1] += rgbLUT[y+yy][x+xx][0]; //red
                        pixelIntensityCount[intensityVal][2] += rgbLUT[y+yy][x+xx][1]; //green
                        pixelIntensityCount[intensityVal][3] += rgbLUT[y+yy][x+xx][2]; //blue

                    }
             //
             //pixelIntensityCount.sort(function (a, b)
             //{
             //return b.val - a.val;
             //});

             //var curMax = pixelIntensityCount[0].val,
             //dIdx = (y*w+x) * 4;

             //destPixData[dIdx] = ~~ (pixelIntensityCount[0].r / curMax);
             //destPixData[dIdx+1] = ~~ (pixelIntensityCount[0].g / curMax);
             //destPixData[dIdx+2] = ~~ (pixelIntensityCount[0].b / curMax);
             //destPixData[dIdx+3] = 255;
        }
    }
    //imshow("Result", paint);
    waitKey();
    return 0;
}

so the part I'm stuck on is converting the array sort function and then creating a new matrix to store the image for showing / writing at the end. I think apart from that it should work? Can anyone suggest to me, the correct way to do that please?

Thanks.