Done ! Testing and not working :)

[photoenhancer] / src / filters / sepia / sepiafilter.h

#ifndef SEPIAFILTER_H
#define SEPIAFILTER_H

#include "filterinterface.h"
class SepiaFilter:public FilterInterface
{
public:
    SepiaFilter();
    void applyFilter(QImage &image);

};

#endif // SEPIAFILTER_H