bsq.h
3.77 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
#include "../envi/envi.h"
#include "../envi/binary.h"
namespace rts{
template <typename T>
class bsq: public binary<T> {
protected:
envi header;
public:
//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 head file"<<std::endl;
return false;
}
binary::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 getBand( 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, 2, page);
return true;
}
//save one pixel of the 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) * sizeof(T), std::ios::beg); //point to the certain sample and line
for (i = 0; i < header.bands; i++)
{
file.read((char *)(p + i), sizeof(T));
file.seekg((header.lines * header.samples - 1) * sizeof(T), std::ios::cur); //go to the next band
}
return true;
}
//baseline correction and save it into file
bool baseline(std::string outname, std::vector<unsigned> bands )
{
unsigned N = bands.size(); //to get points number;
ofstream bitext(outname.c_str(), std::ios::binary); //target binary file
unsigned i, j, k;
unsigned lownum, highnum;
unsigned control=0;
T * low;
T * high;
T * current;
T * temp;
low=(T *)malloc(header.lines * header.samples * sizeof(T)); //memory allocation
high=(T *)malloc(header.lines * header.samples * sizeof(T));
current=(T *)malloc(header.lines * header.samples * sizeof(T));
if (low == NULL || high == NULL || current == NULL){
cout<<"memory allocation failure";
return false;
}
//perform baseline correction
//initialize lownum, highnum, low, high
lownum=0;
if(bands[0] != 0){
highnum = bands[control];
memset(low, 0.0, sizeof(T) * header.lines * header.samples);
}
else{
control += 1;
getBand(low, lownum);
highnum = bands[control];
}
getBand(high, highnum);
//correct every band
for(k = 0; k < header.bands; k++)
{
cout<<k<<endl; //progress bar, delete it afterwards
if( k == highnum && k != header.bands-1) {
//if the high band is now on the last BL point?
if (control != N-1) {
control += 1;
temp=low;
low = high;
high=temp;
lownum=highnum;
highnum = bands[control];
getBand(high, highnum);
}
//if the last BL point on the last band of the file?
else if ( bands[control] != header.bands-1) {
temp = low;
low = high;
high = temp;
memset(high, 0.0, sizeof(T) * header.lines * header.samples);
lownum = highnum;
highnum = header.bands-1;
}
}
getBand(current, k);
for(j=0; j<header.lines; j++)
{
for(i=0; i<header.samples; i++)
{
//straight line correction
current[j * header.samples + i] = current[j * header.samples + i] - (
( high[j * header.samples + i] - low[j * header.samples + i] ) * (T)(k - lownum) / (T)(highnum - lownum)
) - low[j * header.samples + i];
}
}
bitext.write(reinterpret_cast<const char*>(current), sizeof(T) * header.lines * header.samples); //write the corrected data into destination
}
free(low);
free(high);
free(current);
bitext.close();
return true;
}
};
}