ImageTransforms.h

#ifndef _IMAGETRANSFORMS_H_
#define _IMAGETRANSFORMS_H_

#include <QImage>
#include "opencv2/opencv.hpp"
#include "geometric.h"

class ImageTransforms {
    public:
        static void ImageROI(QImage &input, QImage &output, int dx, int dy, int width, int height);
        static void binarize(QImage&, uchar T=128);
        //Converts a 24 or 32 bits color image, returning a 8 bits image, with grayscale color table.
        static QImage toGrayscale(QImage& im);
        //Converts color image in a grayscale image stored in out, respecting its format.
        static void toGrayscale(QImage& in, QImage& out);
        static QImage fromIndexedToARGB32(QImage& im);

        //Copies pixels to previously created images, between Indexed and RGB888 formats,
        //ignoring color palette.
        static void fromIndexedToRGB888(QImage& im_in, QImage& im_out);
        static void show(QImage& im, QString label);
        //Copies pixels. Checks if there is enough room, and if there is a
        //difference in terms
        static bool copyPixelsMatToQImage(cv::Mat &im_in, QImage &im_out);
        static bool copyPixelsQImageToMat(QImage &im_in, cv::Mat &im_out);
        static bool copyPixelsQImage32ToMat24(QImage &im_in, cv::Mat &im_out);

        //Eliminates extra pixels per row, and returns a clean array.
        static uchar *suppressExtraPixelSpace(QImage *image);
        static uchar *suppressExtraPixelSpace(cv::Mat &image);

        //Obtains image roi from 1-channel image
        static void genROIFromMat(cv::Mat &image_roi, cv::Mat &image, BoundingBox &roi);


};

#endif // _IMAGETRANSFORMS_H_