rwPIF.cpp File Reference

Functions for reading and writing PIF files. More...

#include "rwPIF.h"
#include "file_util.h"
#include "utilities.h"

Macros
#define	PIF_SCALE   1e-5

Functions
char *	read_sf (ifstream *fimg, Bimage *p, int mode, int sb)
int	readPIF (Bimage *p, int readdata, int img_select)
	Reading a PIF image and structure factor file format. A 2D and 3D image format used in electron microscopy. There are two types of files: More...
int	writePIF (Bimage *p)
	Writing a PIF image file format. A 2D and 3D image format used in electron microscopy. More...

Variables
int	verbose
char *	month []
double	PIFscale = PIF_SCALE

Detailed Description

Functions for reading and writing PIF files.

Author

Bernard Heymann

Date

Created: 19991112

Modified: 20120706

Macro Definition Documentation

PIF_SCALE

#define PIF_SCALE   1e-5

Function Documentation

read_sf()

char * read_sf	(	ifstream *	fimg,
		Bimage *	p,
		int	mode,
		int	sb
	)

readPIF()

int readPIF	(	Bimage *	p,
		int	readdata,
		int	img_select
	)

Reading a PIF image and structure factor file format. A 2D and 3D image format used in electron microscopy. There are two types of files:

1. A typical binary image format with a file header and a header for each sub-image.
2. A binary structure factor format with the same file header as for the image format File header size: 512 bytes followed by optional 768 byte colour table Image header size: 512 bytes for each image File format extensions: .pif Identifier: supposed to be the first 8 bytes Byte order determination: Data type and third dimension values must be less than 256*256. Data types: 0 = byte, 1 = short, 2 = float, 3 = complex short, 4 = complex float. Transform type: List of structure factors. Note: To avoid endianness problems associated with different floating point formats (particularly those under VMS), this format was intended to store only integers. A 16 byte string following the 8th byte encodes a floating point conversion scale to convert an integer map and some of the fields in the header back to floating point. However, this format was designed in the CCP4/MRC style format, and the floating point data type was retained, as well as complex types used for transforms.

   Parameters

   *p	the image structure.
   readdata	flag to activate reading of image data.
   img_select	image selection in multi-image file (-1 = all images).

   Returns

   int error code (<0 means failure).

writePIF()

int writePIF

(

Bimage *

p

)

Writing a PIF image file format. A 2D and 3D image format used in electron microscopy.

Parameters

*p	the image structure.

Returns

int error code (<0 means failure).

Variable Documentation

month

char* month[]

extern

PIFscale

double PIFscale = PIF_SCALE

verbose

int verbose

extern