Problems in reading binary file
I have difficulty in reading the content of the binary file. When I tried to open the .bin file, all I could see were the weird letters as below:
Code:
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Is there any way that I can convert them to readable letters?I suppose the contents are in numerical floating point form. Here is the program that generate the binary file. I just need to see the contents of the output files (T11.bin,T12_real.bin,T12_imag.bin,T13_real.bin,T1 3_imag.bin,T22.bin,T23_real.bin, T23_imag.bin,T33.bin).
Code:
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#ifdef _WIN32
#include <dos.h>
#include <conio.h>
#endif
/* ALIASES */
/* T matrix */
#define T11 0
#define T12_re 1
#define T12_im 2
#define T13_re 3
#define T13_im 4
#define T22 5
#define T23_re 6
#define T23_im 7
#define T33 8
/* CONSTANTS */
#define Npolar_in 9 /* nb of input/output files */
#define Npolar_out 9
/* ROUTINES DECLARATION */
#include "matrix.h"
#include "util.h"
int main(int argc, char *argv[])
{
/* LOCAL VARIABLES */
/* Input/Output file pointer arrays */
FILE *in_file, *out_file[Npolar_out];
/* Strings */
char toto[20];
char *buf;
char file_name[128], out_dir[128];
char *file_name_out[Npolar_out] = { "T11.bin", "T12_real.bin","T12_imag.bin",
"T13_real.bin","T13_imag.bin", "T22.bin",
"T23_real.bin", "T23_imag.bin", "T33.bin" };
char PolarCase[20], PolarType[20];
/* Input variables */
int Ncol; /* Initial image nb of lines and rows */
int Off_lig, Off_col; /* Lines and rows offset values */
int M_Nlig, M_Ncol; /* Sub-image nb of lines and rows */
int Header; /* Flag for Header 0=No 1=Yes */
int SubSampRG, SubSampAZ;
/* Internal variables */
int np, i, j, k;
int b[10];
long unsigned int kl, reclength;
float p1, p2, p3, p4, p5, p6, p7, p8, p9, p10;
float m_a0pb0, m_a0pb, m_a0mb, m_ma0pb0;
float m_c, m_d, m_e, m_f, m_g, m_h;
/* Matrix arrays */
float **M_in; /* Kennaugh matrix 3D array (lig,col,element) */
float **M_out; /* T matrix 2D array (col,element) */
/* PROGRAM START */
if (argc == 11) {
strcpy(file_name, argv[1]);
strcpy(out_dir, argv[2]);
Ncol = atoi(argv[3]);
Off_lig = atoi(argv[4]);
Off_col = atoi(argv[5]);
M_Nlig = atoi(argv[6]);
M_Ncol = atoi(argv[7]);
Header = atoi(argv[8]);
SubSampRG = atoi(argv[9]);
SubSampAZ = atoi(argv[10]);
} else
edit_error
("airsar_convert_T3 stk_file_name out_dir Ncol offset_lig offset_col sub_nlig sub_ncol Header (0/1) SubSampRG SubSampAZ","");
check_file(file_name);
check_dir(out_dir);
/* Nb of lines and rows sub-sampled image */
M_Nlig = (int) floor(M_Nlig / SubSampAZ);
M_Ncol = (int) floor(M_Ncol / SubSampRG);
strcpy(PolarCase, "monostatic");
strcpy(PolarType, "full");
write_config(out_dir, M_Nlig, M_Ncol, PolarCase, PolarType);
M_in = matrix_float(Npolar_in, Ncol);
M_out = matrix_float(Npolar_out, M_Ncol);
buf = vector_char(Ncol * 10);
/* INPUT/OUTPUT FILE OPENING*/
if ((in_file = fopen(file_name, "rb")) == NULL)
edit_error("Could not open input file : ", file_name);
for (np = 0; np < Npolar_out; np++) {
sprintf(file_name, "%s%s", out_dir, file_name_out[np]);
if ((out_file[np] = fopen(file_name, "wb")) == NULL)
edit_error("Could not open output file : ", file_name);
}
/* SKIP HEADER IF EXISTS */
if (Header == 1) {
rewind(in_file);
fgets(buf, 51, in_file);
fgets(buf, 51, in_file);
fgets(buf, 51, in_file);
fgets(buf, 51, in_file);
fgets(buf, 51, in_file);
fgets(buf, 51, in_file);
fgets(buf, 51, in_file);
fgets(buf, 51, in_file);
fgets(buf, 51, in_file);
fgets(buf, 51, in_file);
fgets(buf, 51, in_file);
fgets(buf, 51, in_file);
fgets(buf, 51, in_file);
strncpy(toto, &buf[40], 10);
toto[10] = '\0';
reclength = atol(toto);
rewind(in_file);
for (kl = 0; kl < reclength; kl++)
fgets(buf, 2, in_file);
}
/* OFFSET LINES READING */
for (i = 0; i < Off_lig; i++)
fread(&buf[0], sizeof(char), 10 * Ncol, in_file);
/* READING AND MULTILOOKING */
for (i = 0; i < M_Nlig; i++) {
if (i%(int)(M_Nlig/20) == 0) {printf("%f\r", 100. * i / (M_Nlig - 1));fflush(stdout);}
fread(&buf[0], sizeof(char), 10 * Ncol, in_file);
for (j = 0; j < Ncol; j++) {
for (k = 0; k < 10; k++)
b[k] = (signed int) buf[10 * j + k];
p1 = (1.5 + (float) b[1] / 254.) * pow(2., (float) b[0]);
p2 = (float) b[2] / 127.;
p3 = (float) b[3] * b[3] / 16129.;
if (b[3] < 0)
p3 = -p3;
p4 = (float) b[4] * b[4] / 16129.;
if (b[4] < 0)
p4 = -p4;
p5 = (float) b[5] * b[5] / 16129.;
if (b[5] < 0)
p5 = -p5;
p6 = (float) b[6] * b[6] / 16129.;
if (b[6] < 0)
p6 = -p6;
p7 = (float) b[7] / 127.;
p8 = (float) b[8] / 127.;
p9 = (float) b[9] / 127.;
p10 = 1. - p7 - p9;
m_a0pb0 = 2. * p1;
m_a0pb = 2. * p1 * p10;
m_a0mb = 2. * p1 * p7;
m_ma0pb0 = 2. * p1 * p9;
m_c = 2. * p1 * p2;
m_d = -2. * p1 * p8;
m_e = 2. * p1 * p5;
m_f = -2. * p1 * p4;
m_g = -2. * p1 * p6;
m_h = 2. * p1 * p3;
M_in[T11][j] = (m_a0pb0 + m_a0pb + m_a0mb - m_ma0pb0) / 2.;
M_in[T22][j] = (m_a0pb0 + m_ma0pb0 + m_a0pb - m_a0mb) / 2.;
M_in[T33][j] = (m_a0pb0 + m_ma0pb0 - m_a0pb + m_a0mb) / 2.;
M_in[T12_re][j] = m_c;
M_in[T12_im][j] = -m_d;
M_in[T13_re][j] = m_h;
M_in[T13_im][j] = m_g;
M_in[T23_re][j] = m_e;
M_in[T23_im][j] = m_f;
}
for (j = 0; j < M_Ncol; j++) {
for (np = 0; np < Npolar_out; np++)
M_out[np][j] = M_in[np][Off_col + j * SubSampRG];
} /*j */
for (np = 0; np < Npolar_out; np++)
fwrite(&M_out[np][0], sizeof(float), M_Ncol, out_file[np]);
for (j = 1; j < SubSampAZ; j++)
fread(&buf[0], sizeof(char), 10 * Ncol, in_file);
} /*i */
/* FILE CLOSING */
fclose(in_file);
for (np = 0; np < Npolar_out; np++)
fclose(out_file[np]);
free_matrix_float(M_out, Npolar_out);
free_matrix_float(M_in, Npolar_in);
return 1;
} /*main */
I'm looking for a favourable reply from you. Thank you very much.
