/**
 * filter.c
 * OpenCV Introduction: Demo 1
 * David Johnston, 2013-01-29
 */

#include <stdio.h>
#include "cv.h"
#include "highgui.h"

void display(IplImage* img)
{
	cvShowImage("DEBUG", img);
	cvWaitKey(0);
}

int main(int argc, char* argv[])
{
	// Load and show the original color image.

	IplImage* img = cvLoadImage("inputs/learningOpenCV.jpg", CV_LOAD_IMAGE_COLOR);  // MACROS
	//display(img);

	IplImage* filtered = cvCreateImage(cvGetSize(img), IPL_DEPTH_8U, 1);
	//display(filtered);


	// Filter 'img'.

	cvCvtColor(img, filtered, CV_BGR2GRAY);
	cvSmooth(filtered, filtered, CV_GAUSSIAN, 3, 3, 0, 0);  // In-place operations.
	cvThreshold(filtered, filtered, 160, 0xFF, CV_THRESH_BINARY);

	display(filtered);

	cvSaveImage("outputs/filtered.png", filtered, 0);
	cvNot(filtered, filtered);
	cvSaveImage("outputs/inverseFiltered.png", filtered, 0);


	// Note that the prototype is 'void cvReleaseImage(IplImage** image)'

	cvReleaseImage(&img);
	cvReleaseImage(&filtered);
	
	return 0;
}