You did not provided a lot of information ;-)
1. If you afraid to post code to forum, you can use pastebin.com or
similar service. Sending links to code/files is IMHO good behaviour (for
images too) :-)
2. I tested it on openSUSE 13.1 64bit with opencv-devel-2.4.9-32.1. And
this command compiles your code (saved as tess-opencv.cpp):
gcc -o tess-opencv tess-opencv.cpp -ltesseract -lstdc++ -lopencv_core \
-lopencv_highgui -lopencv_imgproc
some version of opencv could have different names of libraries. In such
case you need to use e.g. -lhighgui instead of -lopencv_highgui.
Zdenko
On Wed, May 28, 2014 at 12:28 AM, Bernardo Meurer <[email protected]> wrote:
> I didn't want to spam the source code here not knowing it wasn't allowed,
> but here is the code I'm attempting to compile:
> #include <opencv2/imgproc/imgproc.hpp>
> #include <opencv2/highgui/highgui.hpp>
> #include <tesseract/baseapi.h>
> #include <iostream>
> void rgb2cmyk(cv::Mat& src, std::vector<cv::Mat>& cmyk)
> {
> CV_Assert(src.type() == CV_8UC3);
>
> cmyk.clear();
> for (int i = 0; i < 4; ++i)
> cmyk.push_back(cv::Mat(src.size(), CV_32F));
>
> for (int i = 0; i < src.rows; ++i)
> {
> for (int j = 0; j < src.cols; ++j)
> {
> cv::Vec3b p = src.at<cv::Vec3b>(i,j);
>
> float r = p[2] / 255.;
> float g = p[1] / 255.;
> float b = p[0] / 255.;
> float k = (1 - std::max(std::max(r,g),b));
>
> cmyk[0].at<float>(i,j) = (1 - r - k) / (1 - k);
> cmyk[1].at<float>(i,j) = (1 - g - k) / (1 - k);
> cmyk[2].at<float>(i,j) = (1 - b - k) / (1 - k);
> cmyk[3].at<float>(i,j) = k;
> }
> }
> }
>
> int main()
> {
> cv::Mat im0 = cv::imread("scratchcard.png");
> if (!im0.data)
> return -1;
>
> std::vector<cv::Mat> cmyk;
> rgb2cmyk(im0, cmyk);
>
> cv::Mat im1;
> im1 = cmyk[3].mul(1 - cmyk[1]) > 0.25;
>
> cv::Mat im2;
> im1.convertTo(im2, CV_8U);
>
> std::vector<std::vector<cv::Point> > contours;
> cv::findContours(im2, contours, CV_RETR_EXTERNAL,
> CV_CHAIN_APPROX_NONE);
>
> double max_area = 0;
> int max_idx = 0;
> for (int i = 0; i < contours.size(); i++)
> {
> double area = cv::contourArea(contours[i]);
> max_idx = area > max_area ? i : max_idx;
> max_area = area > max_area ? area : max_area;
> }
>
> im2.setTo(cv::Scalar(0));
> cv::drawContours(im2, contours, max_idx, cv::Scalar(255), -1);
>
> cv::Mat im3;
> cv::cvtColor(im0, im3, CV_BGR2GRAY);
> im3 = ((255 - im3) & im2) > 200;
>
> cv::Mat dst = im3.clone();
> cv::findContours(dst.clone(), contours, CV_RETR_EXTERNAL,
> CV_CHAIN_APPROX_NONE);
> for (int i = 0; i < contours.size(); i++)
> {
> if (cv::contourArea(contours[i]) < 100)
> cv::drawContours(dst, contours, i, cv::Scalar(0), -1);
> }
>
> tesseract::TessBaseAPI tess;
> tess.Init(NULL, "eng", tesseract::OEM_DEFAULT);
> tess.SetVariable("tessedit_char_whitelist", "0123456789");
> tess.SetPageSegMode(tesseract::PSM_SINGLE_BLOCK);
> tess.SetImage((uchar*)dst.data, dst.cols, dst.rows, 1, dst.cols);
>
> char* out = tess.GetUTF8Text();
> std::cout << out << std::endl;
>
> cv::imshow("src", im0);
> cv::imshow("dst", dst);
> cv::waitKey();
> return 0;
> }
>
> I included OpenCV and Tesseract as the example code instructed, but maybe
> I'm missing one #include.
>
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