pnm.h

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#ifndef PNM_H
#define PNM_H

#include <itpp/base/mat.h>


namespace itpp
{

//--------------------------------------------------------------
// General PNM functions
char pnm_type(const std::string & filename);

bool pnm_info(const std::string & filename,
              char & pnm_type,
              int & width,
              int & height,
              int & max_val,
              std::string & comments);

//--------------------------------------------------------------
// PGM related functions (gray images)
bool pgm_read(const std::string & filename, imat & m,
              std::string & comments);


bool pgm_read(const std::string & filename, imat &m,
              int r1, int r2, int c1, int c2);


imat pgm_read(const std::string & filename);


bool pgm_write(const std::string & filename,
               const imat &m,
               const std::string & comments = "Generated by IT++ (http://itpp.sourceforge.net)");


//--------------------------------------------------------------
// PPM related functions (color images)
bool ppm_read(const std::string & filename,
              imat &r, imat &g, imat &b,
              std::string & comments);


bool ppm_read(const std::string & filename,
              imat &r, imat &g, imat &b);


bool ppm_read(const std::string & filename,
              imat &r, imat &g, imat &b,
              int r1, int r2, int c1, int c2);

bool ppm_write(const std::string & filename,
               const imat &r,
               const imat &g,
               const imat &b,
               const std::string & comments = "Generated by IT++ (http://itpp.sourceforge.net)",
               int max_val = 255);

imat img_double2int(const mat & m,
                    int max_val = 255,
                    double double_min = 0 ,
                    double double_max = 1);

mat img_int2double(const imat & m,
                   int max_val = 255,
                   double double_min = 0,
                   double double_max = 1);

} // namespace itpp

#endif // #ifndef PNM_H

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