Hello! i'm biggner in programming. I've copied this code in visual studio 2012,
include "opencv2/imgproc/imgproc.hpp"
include "opencv2/highgui/highgui.hpp"
include <iostream>
using namespace std; using namespace cv; Mat src; void MyCallbackForBrightness(int iValueForBrightness, void *userData) {
Mat dst; int iValueForContrast = ( static_cast<int*>(userData) ); //Calculating brightness and contrast value int iBrightness = iValueForBrightness - 50; double dContrast = iValueForContrast / 50.0; //Calculated contrast and brightness value cout << "MyCallbackForBrightness : Contrast=" << dContrast << ", Brightness=" << iBrightness << endl; //adjust the brightness and contrast src.convertTo(dst, -1, dContrast, iBrightness); //show the brightness and contrast adjusted image imshow("My Window", dst); } void MyCallbackForContrast(int iValueForContrast, void *userData) { Mat dst; int iValueForBrightness = *( static_cast<int*>(userData) ); //Calculating brightness and contrast value int iBrightness = iValueForBrightness - 50; double dContrast = iValueForContrast / 50.0; //Calculated contrast and brightness value cout << "MyCallbackForContrast : Contrast=" << dContrast << ", Brightness=" << iBrightness << endl; //adjust the brightness and contrast src.convertTo(dst, -1, dContrast, iBrightness); //show the brightness and contrast adjusted image imshow("My Window", dst); } int main(int argc, char* argv) { // Read original image IplImage *dd = cvLoadImage("D:\ashish.png"); Mat src(dd); //if fail to read the image if (src.data == false) { cout << "Error loading the image" << endl; return -1; } // Create a window namedWindow("My Window", 1); int iValueForBrightness = 50; int iValueForContrast = 50; //Create track bar to change brightness createTrackbar("Brightness", "My Window", &iValueForBrightness, 100, MyCallbackForBrightness, &iValueForContrast); //Create track bar to change contrast createTrackbar("Contrast", "My Window", &iValueForContrast, 100, MyCallbackForContrast, &iValueForBrightness); imshow("My Window", src); // Wait until user press some key waitKey(0); return 0; }
in output image is displayed on the window only with "one"(not two as in code) trackbar but as i changed the position of slider on that it give following error
Unhandled exception at at 0x75CCB727 in mynewopen.exe: Microsoft C++ exception: cv::Exception at memory location 0x0036F4CC.
---and also the name of the trackbar that is in code is not same as in displayed output it shows some random symbols.
