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pnm.cpp File Reference

Implementation of PNM graphics format I/O function. More...

#include <itpp/srccode/pnm.h>
#include <itpp/base/itassert.h>
#include <fstream>

Go to the source code of this file.

Namespaces

namespace  itpp
 

\


Functions

static void itpp::pnm_read_comments (istream &i, string &comments)
static void itpp::pnm_write_comments (ostream &o, const string &comments)
static bool itpp::pnm_read_header (ifstream &file, char &pnm_type, int &width, int &height, int &max_val, string &comments, char pnm_type_required= '0')
static bool itpp::pnm_write_header (ofstream &file, char type, int width, int height, int max_val, const string &comments)
char itpp::pnm_type (const std::string &filename)
 Determines the type of a PNM file, based on magic numbers. The returned value is a character between '1' and '6'. If an error occured, the returned value is the character '0'.
bool itpp::pnm_info (const std::string &filename, char &pnm_type, int &width, int &height, int &max_val, std::string &comments)
 Retrieve some information about an pnm file.
bool itpp::pgm_read (const std::string &filename, imat &m, std::string &comments)
 Read the entire graymap into the matrix m or return false if the function failed.
imat itpp::pgm_read (const std::string &filename)
 Read a pgm file of name filename and return the corresponding matrix of integers. Return a void matrix if an error ocurred.
bool itpp::pgm_read (const std::string &filename, imat &m, int r1, int r2, int c1, int c2)
 Read a part of the graymap into the matrix m.
bool itpp::pgm_write (const std::string &filename, const imat &m, const std::string &comments="Generated by IT++ (http://itpp.sourceforge.net)")
 Create an image file from the matrix of integer.
bool itpp::ppm_read (const std::string &filename, imat &r, imat &g, imat &b, std::string &comments)
 Read the color image file in the format ppm. The image is retrieved as a set of three matrices, each of whom is a plan of RGB component.
bool itpp::ppm_read (const std::string &filename, imat &r, imat &g, imat &b)
 Read the color image file in the PPM format.
bool itpp::ppm_read (const std::string &filename, imat &r, imat &g, imat &b, int r1, int r2, int c1, int c2)
 Read a part of the pixmap into the matrix m. The parameters r1, r2, c1 and c2 are the rows and columns (inclusive) of the subimage.
bool itpp::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)
 Write the matrix m as a pixmap.
imat itpp::img_double2int (const mat &m, int max_val=255, double double_min=0, double double_max=1)
 Prepare a matrix of double to be writted as an image.
mat itpp::img_int2double (const imat &m, int max_val=255, double double_min=0, double double_max=1)
 Return a matrix of double which is a scaled version of the input matrix m of integers.

Detailed Description

Implementation of PNM graphics format I/O function.

Author:

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Definition in file pnm.cpp.

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