88c3e636
 heziqi
Ziqi added big.h
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#include "../envi/envi.h"
#include "../envi/binary.h"
#include <cstring>
#include <utility>
namespace rts{
template <typename T>
class bip: public binary<T> {
protected:
envi header;
public:
using binary<T>::open;
using binary<T>::file;
using binary<T>::getSlice;
//open a file, given the file and its header's names
bool open(std::string filename, std::string headername){
if (header.load(headername)==false){
std::cout<<"ERROR: unable to load header file: "<<headername<<std::endl;
return false;
}
open(filename, vec<unsigned int>(header.samples, header.lines, header.bands), header.header_offset);
return true;
}
//save one band of the file into the memory, and return the pointer
bool band_index( T * p, unsigned int page){
if (page >= header.bands){ //make sure the bank number is right
std::cout<<"ERROR: page out of range"<<std::endl;
return false;
}
getSlice(p, 0, page);
return true;
}
bool getBand( T * p, double wavelength){
unsigned int XY = header.samples * header.lines; //calculate the number of pixels in a band
unsigned page=0; //bands around the wavelength
T * p1;
T * p2;
//get the bands numbers around the wavelength
//if wavelength is smaller than the first one in header file
if ( header.wavelength[page] > wavelength ){
band_index(p, page);
return true;
}
while( header.wavelength[page] < wavelength )
{
page++;
//if wavelength is larger than the last wavelength in header file
if (page == header.bands) {
band_index(p, header.bands-1);
return true;
}
}
if ( wavelength < header.wavelength[page] )
{
p1=(T*)malloc( XY * sizeof(T)); //memory allocation
p2=(T*)malloc( XY * sizeof(T));
band_index(p1, page - 1);
band_index(p2, page );
for(unsigned i=0; i < XY; i++){
double r = (double) (wavelength - header.wavelength[page-1]) / (double) (header.wavelength[page] - header.wavelength[page-1]);
p[i] = (p2[i] - p1[i]) * r + p1[i];
}
}
else //if the wavelength is equal to a wavelength in header file
{
band_index(p, page);
}
free(p1);
free(p2);
return true;
}
//save one pixel of the BIP file into the memory, and return the pointer
bool getSpectrum(T * p, unsigned x, unsigned y){
unsigned int i;
if ( x >= header.samples || y >= header.lines){ //make sure the sample and line number is right
std::cout<<"ERROR: sample or line out of range"<<std::endl;
return false;
}
file.seekg((x + y * header.samples) * header.bands * sizeof(T), std::ios::beg); //point to the certain sample and line
file.read((char *)p, sizeof(T) * header.bands);
return true;
}
// not finished yet
//(BIP) baseline correction
bool baseline(std::string outname, std::vector<double> wls )
{
unsigned N = wls.size(); //get the number of baseline points
std::ofstream target(outname.c_str(), std::ios::binary); //open the target binary file
std::string headername = outname + ".hdr"; //the header file name
//simplify image resolution
unsigned int B = header.bands; //calculate the number of bands
unsigned int L = B * sizeof(T);
T* c; //pointer to the current spectrum
c = (T*)malloc(L);
}
/*
//(BSQ)baseline correction and save it into file
bool baseline(std::string outname, std::vector<double> wls )
{
unsigned N = wls.size(); //get the number of baseline points
std::ofstream target(outname.c_str(), std::ios::binary); //open the target binary file
std::string headername = outname + ".hdr"; //the header file name
//simplify image resolution
unsigned int B = header.bands; //calculate the number of bands
unsigned int XY = header.samples * header.lines; //calculate the number of pixels in a band
unsigned int S = XY * sizeof(T); //calculate the number of bytes in a band
double ai, bi; //stores the two baseline points wavelength surrounding the current band
double ci; //stores the current band's wavelength
// unsigned aii, bii; //stores the two baseline points number surrounding the current band
unsigned control=0;
T * a; //pointers to the high and low band images
T * b;
T * c; //pointer to the current image
a = (T*)malloc( S ); //memory allocation
b = (T*)malloc( S );
c = (T*)malloc( S );
if (a == NULL || b == NULL || c == NULL){
std::cout<<"ERROR: error allocating memory";
exit(1);
}
//initialize lownum, highnum, low, high
ai=header.wavelength[0];
//if no baseline point is specified at band 0,
//set the baseline point at band 0 to 0
if(wls[0] != header.wavelength[0]){
bi = wls[control];
memset(a, (char)0, S);
}
//else get the low band
else{
control += 1;
getBand(a, ai);
bi = wls[control];
}
//get the high band
getBand(b, bi);
//correct every band
for(unsigned cii = 0; cii < B; cii++){
//update baseline points, if necessary
if( header.wavelength[cii] >= bi && cii != B - 1) {
//if the high band is now on the last BL point?
if (control != N-1) {
control++; //increment the index
std::swap(a, b); //swap the baseline band pointers
ai = bi;
bi = wls[control];
getBand(b, bi);
}
//if the last BL point on the last band of the file?
else if ( wls[control] < header.wavelength[B - 1]) {
std::swap(a, b); //swap the baseline band pointers
memset(b, (char)0, S); //clear the high band
ai = bi;
bi = header.wavelength[B - 1];
}
}
//get the current band
band_index(c, cii);
ci = header.wavelength[cii];
//perform the baseline correction
for(unsigned i=0; i < XY; i++){
double r = (double) (ci - ai) / (double) (bi - ai);
c[i] =(float) ( c[i] - (b[i] - a[i]) * r - a[i] );
}
target.write(reinterpret_cast<const char*>(c), S); //write the corrected data into destination
}
header.save(headername); //save the new header file
free(a);
free(b);
free(c);
target.close();
return true;
}
*/
// normalize the BSQ file
bool normalize(std::string outname, double band)
{
unsigned int B = header.bands; //calculate the number of bands
unsigned int XY = header.samples * header.lines; //calculate the number of pixels in a band
unsigned int S = XY * sizeof(T); //calculate the number of bytes in a band
std::ofstream target(outname.c_str(), std::ios::binary); //open the target binary file
std::string headername = outname + ".hdr"; //the header file name
T * b; //pointers to the certain wavelength band
T * c; //pointer to the current image
b = (T*)malloc( S ); //memory allocation
c = (T*)malloc( S );
getBand(b, band); //get the certain band into memory
for(unsigned j = 0; j < B; j++)
{
band_index(c, j); //get the current band into memory
for(unsigned i = 0; i < XY; i++)
{
c[i] = c[i] / b[i];
}
target.write(reinterpret_cast<const char*>(c), S); //write normalized data into destination
std::cout<<j<<std::endl;
}
header.save(headername); //save the new header file
free(b);
free(c);
target.close();
return true;
}
};
}
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