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#ifndef STIM_IMAGE_H
#define STIM_IMAGE_H
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#ifdef _WIN32
#undef max
#endif
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#include <vector>
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#include <iostream>
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#include <limits> //use limits and remove the MIN and MAX macros
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#include <typeinfo>
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#include <fstream>
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#include <cstring>
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#include <stim/image/CImg.h>
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#include <stim/parser/filename.h>
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namespace stim{
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/// This static class provides the STIM interface for loading, saving, and storing 2D images.
/// Data is stored in an interleaved (BIP) format (default for saving and loading is RGB).
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template <class T>
class image{
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T* img; //pointer to the image data (interleaved RGB for color)
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size_t R[3];
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bool interleaved = true; //by default the data is interleaved
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inline size_t X() const { return R[1]; }
inline size_t Y() const { return R[2]; }
inline size_t C() const { return R[0]; }
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void init(){ //initializes all variables, assumes no memory is allocated
memset(R, 0, sizeof(size_t) * 3); //set the resolution and number of channels to zero
img = NULL;
}
void unalloc(){ //frees any resources associated with the image
if(img) free(img); //if memory has been allocated, free it
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}
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void clear(){ //clears all image data
unalloc(); //unallocate previous memory
init(); //re-initialize the variables
}
void allocate(){
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unalloc();
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img = (T*) malloc( sizeof(T) * R[0] * R[1] * R[2] ); //allocate memory
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if (img == NULL) {
std::cout << "stim::image ERROR - failed to allocate memory for image" << std::endl;
exit(1);
}
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}
void allocate(size_t x, size_t y, size_t c){ //allocate memory based on the resolution
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R[0] = c; R[1] = x; R[2] = y; //set the resolution
allocate(); //allocate memory
}
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inline size_t idx(size_t x, size_t y, size_t c = 0) const {
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return y * R[0] * R[1] + x * R[0] + c;
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}
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/// Returns the value for "white" based on the dynamic range (assumes white is 1.0 for floating point images)
T white(){
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if (typeid(T) == typeid(double) || typeid(T) == typeid(float))
return (T)1.0;
else
return std::numeric_limits<T>::max();
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}
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public:
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size_t bytes() { return size() * sizeof(T); }
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/// Default constructor - creates an empty image object
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image(){ init(); } //initialize all variables to zero, don't allocate any memory
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/// Constructor with a filename - loads the specified file
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image(std::string filename){ //constructor initialize the image with an image file
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init();
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load(filename);
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}
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/// Create a new image from scratch given a number of samples and channels
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image(size_t x, size_t y = 1, size_t c = 1){
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init();
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allocate(x, y, c);
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}
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/// Create a new image with the data given in 'data'
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image(T* data, size_t x, size_t y, size_t c = 1){
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init();
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allocate(x, y, c);
memcpy(img, data, bytes());
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}
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/// Copy constructor - duplicates an image object
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image(const stim::image<T>& I){
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init();
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allocate(I.X(), I.Y(), I.C());
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memcpy(img, I.img, bytes());
}
/// Destructor - clear memory
~image(){
free(img);
}
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stim::image<T>& operator=(const stim::image<T>& I){
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if(&I == this) //handle self-assignment
return *this;
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init();
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allocate(I.X(), I.Y(), I.C());
memcpy(img, I.img, bytes());
return *this;
}
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//determines if a filename represents a valid file format that can be loaded/saved
static bool test_filename(std::string f) {
stim::filename fname = f;
std::string ext = fname.extension();
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if (ext == "bmp" ||
ext == "jpg" ||
ext == "png" ||
ext == "pbm" ||
ext == "tif" )
return true;
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else
return false;
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}
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//save a Netpbm file
void load_netpbm(std::string filename) {
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std::ifstream infile(filename.c_str(), std::ios::in | std::ios::binary); //open an output file
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if (!infile) {
std::cout << "Error opening input file in image::load_netpbm()" << std::endl;
exit(1);
}
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size_t nc; //allocate space for the number of channels
char format[2]; //allocate space to hold the image format tag
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infile.read(format, 2); //read the image format tag
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infile.seekg(1, std::ios::cur); //skip the newline character
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if (format[0] != 'P') {
std::cout << "Error in image::load_netpbm() - file format tag is invalid: " << format[0] << format[1] << std::endl;
exit(1);
}
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if (format[1] == '5') nc = 1; //get the number of channels from the format flag
else if (format[1] == '6') nc = 3;
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else {
std::cout << "Error in image::load_netpbm() - file format tag is invalid: " << format[0] << format[1] << std::endl;
exit(1);
}
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unsigned char c; //stores a character
while (infile.peek() == '#') { //if the next character indicates the start of a comment
while (true) {
c = infile.get();
if (c == 0x0A) break;
}
}
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std::string sw; //create a string to store the width of the image
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while(true){
c = infile.get(); //get a single character
if (c == ' ') break; //exit if we've encountered a space
sw.push_back(c); //push the character on to the string
}
size_t w = atoi(sw.c_str()); //convert the string into an integer
std::string sh;
while (true) {
c = infile.get();
if (c == 0x0A) break;
sh.push_back(c);
}
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while (true) { //skip the maximum value
c = infile.get();
if (c == 0x0A) break;
}
size_t h = atoi(sh.c_str()); //convert the string into an integer
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allocate(w, h, nc); //allocate space for the image
unsigned char* buffer = (unsigned char*)malloc(w * h * nc); //create a buffer to store the read data
infile.read((char*)buffer, size()); //copy the binary data from the file to the image
infile.close(); //close the file
for (size_t n = 0; n < size(); n++) img[n] = (T)buffer[n]; //copy the buffer data into the image
free(buffer); //free the buffer array
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}
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//Copy N data points from source to dest, casting while doing so
template<typename S, typename D>
void type_copy(S* source, D* dest, size_t N) {
if (typeid(S) == typeid(D)) //if both types are the same
memcpy(dest, source, N * sizeof(S)); //just use a memcpy
for (size_t n = 0; n < N; n++) //otherwise, iterate through each element
dest[n] = (D)source[n]; //copy and cast
}
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/// Load an image from a file
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void load(std::string filename){
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//Use CImg to load the file
cimg_library::CImg<T> cimg(filename.c_str()); //create a CImg object for the image file
set_noninterleaved(cimg.data(), cimg.width(), cimg.height(), cimg.spectrum());
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}
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//save a Netpbm file
void save_netpbm(std::string filename) {
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std::ofstream outfile(filename.c_str(), std::ios::out | std::ios::binary); //open an output file
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if(!outfile) {
std::cout << "Error generating output file in image::save_netpbm()" << std::endl;
exit(1);
}
if (sizeof(T) != 1) {
std::cout << "Error in image::save_netpbm() - data type must be 8-bit integer." << std::endl;
exit(1);
}
std::string format;
if (channels() == 1) outfile << "P5" << (char)0x0A; //output P5 if the file is grayscale
else if (channels() == 3) outfile << "P6" << (char)0x0A; //output P6 if the file is color
else {
std::cout << "Error in image::save_netpbm() - data must be grayscale or RGB." << std::endl;
exit(1);
}
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size_t w = width();
size_t h = height();
outfile << w << " " << h << (char)0x0A; //save the width and height
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outfile << "255" << (char)0x0A; //output the maximum value
outfile.write((const char*)img, size()); //write the binary data
outfile.close();
}
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//save a file
void save(std::string filename){
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stim::filename file(filename);
if (file.extension() == "raw" || file.extension() == "") {
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std::ofstream outfile(filename.c_str(), std::ios::binary);
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outfile.write((char*)img, sizeof(T) * R[0] * R[1] * R[2]);
outfile.close();
}
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else {
cimg_library::CImg<T> cimg((unsigned int)R[1], (unsigned int)R[2], 1, (unsigned int)R[0]);
get_noninterleaved(cimg.data());
cimg.save(filename.c_str());
}
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}
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/// Returns an image cast to the specified format
template<typename U>
image<U> convert() {
image<U> new_image(R[1], R[2], R[0]); //create a new image with the destination data type
size_t ni = R[0] * R[1] * R[2]; //calculate the number of data points in the image
double inmax = (std::numeric_limits<T>::max)(); //get the maximum value for the input image
double outmax = (std::numeric_limits<U>::max)(); //get the maximum value for the output image
for (size_t i = 0; i < ni; i++) { //for each pixel in the image
if (img[i] > outmax) new_image(i) = outmax; //if the source pixel is greater than the maximum destination pixel, set the output to maximum
else new_image(i) = img[i]; //otherwise, copy the source value and cast it to the destination value
}
return new_image;
}
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void set_interleaved(T* buffer, size_t width, size_t height, size_t channels){
allocate(width, height, channels);
memcpy(img, buffer, bytes());
}
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//create an image from an interleaved buffer
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void set_interleaved_rgb(T* buffer, size_t width, size_t height){
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set_interleaved(buffer, width, height, 3);
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}
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void set_interleaved_bgr(T* buffer, size_t width, size_t height){
allocate(width, height, 3);
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T value;
size_t i;
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for(size_t c = 0; c < C(); c++){ //copy directly
for(size_t y = 0; y < Y(); y++){
for(size_t x = 0; x < X(); x++){
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i = y * X() * C() + x * C() + (2-c);
value = buffer[i];
img[idx(x, y, c)] = value;
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}
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}
}
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}
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void set_interleaved(T* buffer, size_t width, size_t height){
set_interleaved_rgb(buffer, width, height);
}
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//copies data in the given channel order as a non-interleaved image
void set_noninterleaved(T* data, size_t width, size_t height, size_t chan) {
allocate(width, height, chan);
//for each channel
for (size_t y = 0; y < Y(); y++) {
for (size_t x = 0; x < X(); x++) {
for (size_t c = 0; c < C(); c++) {
img[idx(x, y, c)] = data[c * Y() * X() + y * X() + x];
}
}
}
}
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void get_interleaved_bgr(T* data){
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//for each channel
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T* source;
if (C() == 3) {
source = img; //if the image has 3 channels, interleave all three
}
else if (C() == 4) {
source = img + X() * Y(); //if the image has 4 channels, skip the alpha channel
}
else {
throw std::runtime_error("ERROR: a BGR image must be 3 or 4 channels"); //throw an error if any other number of channels is provided
}
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c8c976a9
David Mayerich
replaced CImg wit...
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for(size_t y = 0; y < Y(); y++){
for(size_t x = 0; x < X(); x++){
|
fdc7f32c
David Mayerich
Added a coupled w...
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331
332
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for(size_t c = 0; c < 3; c++){
data[y * X() * 3 + x * 3 + (2-c)] = source[y*3*R[1] + x*3 + c];
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c8c976a9
David Mayerich
replaced CImg wit...
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333
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335
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}
}
}
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8b7be670
David Mayerich
implemented savin...
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336
337
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}
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9b766f1f
Pavel Govyadinov
completed merge f...
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338
339
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341
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void get_interleaved_rgb(T* data){
memcpy(data, img, bytes());
}
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904614c3
David Mayerich
added normalizati...
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342
343
344
345
346
347
348
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350
351
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353
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//copies data in the given channel order as a non-interleaved image
void get_noninterleaved(T* data){
//for each channel
for(size_t y = 0; y < Y(); y++){
for(size_t x = 0; x < X(); x++){
for(size_t c = 0; c < C(); c++){
data[c * Y() * X() + y * X() + x] = img[idx(x, y, c)];
}
}
}
}
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dbeb83f2
David Mayerich
added separable c...
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354
355
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/// Return an image representing a specified channel
/// @param c is the channel to be returned
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86dfa80b
David Mayerich
added 2D gaussian...
|
356
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image<T> channel(size_t c) const {
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dbeb83f2
David Mayerich
added separable c...
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357
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image<T> r(X(), Y(), 1); //create a new image
|
c8c976a9
David Mayerich
replaced CImg wit...
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358
359
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for(size_t x = 0; x < X(); x++){
for(size_t y = 0; y < Y(); y++){
|
8e2fb2b4
David Mayerich
fixed a segmentat...
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360
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r.img[r.idx(x, y, 0)] = img[idx(x, y, c)];
|
c8c976a9
David Mayerich
replaced CImg wit...
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361
362
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}
}
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c8c976a9
David Mayerich
replaced CImg wit...
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363
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return r;
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dbeb83f2
David Mayerich
added separable c...
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364
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}
/// Returns an std::vector containing each channel as a separate image
|
683f216a
David Mayerich
fixed? Linux comp...
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367
368
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std::vector< image<T> > split() const {
std::vector< image<T> > r; //create an image array
|
dbeb83f2
David Mayerich
added separable c...
|
369
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r.resize(C()); //create images for each channel
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41acaf5d
David Mayerich
added a CUDA Gaus...
|
370
|
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dbeb83f2
David Mayerich
added separable c...
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371
372
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for (size_t c = 0; c < C(); c++) { //for each channel
r[c] = channel(c); //copy the channel image to the array
}
return r;
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41acaf5d
David Mayerich
added a CUDA Gaus...
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375
376
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}
|
86dfa80b
David Mayerich
added 2D gaussian...
|
377
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/// Merge a series of single-channel images into a multi-channel image
|
683f216a
David Mayerich
fixed? Linux comp...
|
378
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void merge(std::vector< image<T> >& list) {
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86dfa80b
David Mayerich
added 2D gaussian...
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379
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381
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383
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385
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size_t x = list[0].width(); //calculate the size of the image
size_t y = list[0].height();
allocate(x, y, list.size()); //re-allocate the image
for (size_t c = 0; c < list.size(); c++) //for each channel
set_channel(list[c].channel(0).data(), c); //insert the channel into the output image
}
|
c8c976a9
David Mayerich
replaced CImg wit...
|
386
387
|
T& operator()(size_t x, size_t y, size_t c = 0){
return img[idx(x, y, c)];
|
3d0b6243
David Mayerich
fixed hsiproc bug...
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388
389
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}
|
08ada8c2
David Mayerich
updated image to ...
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390
391
392
393
394
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/// This function returns a pixel reference based on a 1D index into the image
T& operator()(size_t i) {
return img[i];
}
|
3d0b6243
David Mayerich
fixed hsiproc bug...
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395
396
397
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/// Set all elements in the image to a given scalar value
/// @param v is the value used to set all values in the image
|
a8ad9192
David Mayerich
removed warnings ...
|
398
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void set_all(T v) { //set all elements of the image to a given value v
|
c8c976a9
David Mayerich
replaced CImg wit...
|
399
|
size_t N = size();
|
a8ad9192
David Mayerich
removed warnings ...
|
400
401
402
403
|
for (size_t n = 0; n < N; n++) img[n] = v;
}
image<T> operator=(T v){
set_all(v);
|
3d0b6243
David Mayerich
fixed hsiproc bug...
|
404
|
return *this;
|
3d0b6243
David Mayerich
fixed hsiproc bug...
|
405
406
|
}
|
a7ed4b2e
David Mayerich
ivote updates
|
407
408
409
410
411
412
413
414
415
|
/// invert the image, given a specified maximum value (ex. maxval = 255, I' = 255 - I)
/*image<T> invert(T maxval) {
image<T> result(width(), height(), channels()); //create a new image
size_t N = size(); //get the number of elements in the image
for (size_t n = 0; n < N; n++)
result.data()[n] = maxval - img[n]; //perform the inversion and save the result to the new image
return result;
}*/
|
5bd6c411
David Mayerich
added contrast st...
|
416
417
418
419
|
/// Stretch the contrast of the image such that the minimum and maximum intensity match the given values
image<T> stretch(T low, T high) {
T maxval = maxv();
T minval = minv();
|
5bd6c411
David Mayerich
added contrast st...
|
420
|
image<T> result = *this; //create a new image for output
|
a8ad9192
David Mayerich
removed warnings ...
|
421
422
423
424
425
|
if (maxval == minval) { //if the minimum and maximum values are the same, return an image composed of low
result = low;
return result;
}
|
5bd6c411
David Mayerich
added contrast st...
|
426
|
size_t N = size(); //get the number of values in the image
|
d9b2b2a8
David Mayerich
enabled basic rea...
|
427
428
|
T range = maxval - minval; //calculate the current range of the image
T desired_range = high - low; //calculate the desired range of the image
|
5bd6c411
David Mayerich
added contrast st...
|
429
|
for (size_t n = 0; n < N; n++) { //for each element in the image
|
ec0fdb47
Mahsa Lotfollahi
changes in stretc...
|
430
|
result.data()[n] = desired_range * (img[n] - minval) / range + low;
|
5bd6c411
David Mayerich
added contrast st...
|
431
432
433
434
|
}
return result;
}
|
70f0baaf
Laila Saadatifard
update the image....
|
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
|
/// Add a border of width w with the given value around the image
/// @param w specifies the total size of the border
/// @param T is the pixel value (all channels will be the same)
image<T> border(size_t w, T value = 0) {
image<T> result(width() + w * 2, height() + w * 2, channels()); //create an output image
result = value; //assign the border value to all pixels in the new image
for (size_t y = 0; y < height(); y++) { //for each pixel in the original image
for (size_t x = 0; x < width(); x++) {
size_t n = (y + w) * (width() + w * 2) + x + w; //calculate the index of the corresponding pixel in the result image
size_t n0 = idx(x,y); //calculate the index for this pixel in the original image
result.data()[n] = img[n0]; // copy the original image to the result image afer the border area
}
}
return result;
}
|
276f9b23
David Mayerich
forced matching t...
|
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
|
/// Adds curcular padding for the specified number of pixels - in this case replicating the boundary pixels
image<T> pad_replicate(size_t p) {
image<T> result(width() + p * 2, height() + p * 2, channels()); //create an output image
result = 0;
//result = value; //assign the border value to all pixels in the new image
for (size_t y = 0; y < height(); y++) { //for each pixel in the original image
for (size_t x = 0; x < width(); x++) {
size_t n = (y + p) * (width() + p * 2) + x + p; //calculate the index of the corresponding pixel in the result image
size_t n0 = idx(x, y); //calculate the index for this pixel in the original image
result.data()[n] = img[n0]; // copy the original image to the result image afer the border area
}
}
size_t l = p;
size_t r = p + width() - 1;
size_t t = p;
size_t b = p + height() - 1;
for (size_t y = 0; y < p; y++) for (size_t x = l; x <= r; x++) result(x, y) = result(x, t); //pad the top
for (size_t y = b + 1; y < result.height(); y++) for (size_t x = l; x <= r; x++) result(x, y) = result(x, b); //pad the bottom
for (size_t y = t; y <= b; y++) for (size_t x = 0; x < l; x++) result(x, y) = result(l, y); //pad the left
for (size_t y = t; y <= b; y++) for (size_t x = r+1; x < result.width(); x++) result(x, y) = result(r, y); //pad the right
for (size_t y = 0; y < t; y++) for (size_t x = 0; x < l; x++) result(x, y) = result(l, t); //pad the top left
for (size_t y = 0; y < t; y++) for (size_t x = r+1; x < result.width(); x++) result(x, y) = result(r, t); //pad the top right
for (size_t y = b+1; y < result.height(); y++) for (size_t x = 0; x < l; x++) result(x, y) = result(l, b); //pad the bottom left
for (size_t y = b+1; y < result.height(); y++) for (size_t x = r + 1; x < result.width(); x++) result(x, y) = result(r, b); //pad the bottom right
return result;
}
|
f186dbda
Tianshu Cheng
header file for b...
|
478
479
480
481
482
|
/// Copy the given data to the specified channel
/// @param c is the channel number that the data will be copied to
/// @param buffer is a pointer to the image to be copied to channel c
|
c8c976a9
David Mayerich
replaced CImg wit...
|
483
|
void set_channel(T* buffer, size_t c){
|
c8c976a9
David Mayerich
replaced CImg wit...
|
484
485
486
|
size_t x, y;
for(y = 0; y < Y(); y++){
for(x = 0; x < X(); x++){
|
2e5e3a26
David Mayerich
added 2D convolut...
|
487
|
img[idx(x, y, c)] = buffer[y * X() + x];
|
c8c976a9
David Mayerich
replaced CImg wit...
|
488
489
|
}
}
|
6d30a707
Tianshu Cheng
add cuda/array_ad...
|
490
491
|
}
|
8718a1a0
David Mayerich
moved back to CImg
|
492
493
494
495
496
497
498
499
500
501
502
503
504
505
|
/// Set the specified channel to a constant value
/// @param c is the channel number that the data will be copied to
/// @param buffer is a pointer to the image to be copied to channel c
void set_channel(T val, size_t c) {
size_t x, y;
for (y = 0; y < Y(); y++) {
for (x = 0; x < X(); x++) {
img[idx(x, y, c)] = val;
}
}
}
|
86dfa80b
David Mayerich
added 2D gaussian...
|
506
|
size_t channels() const{
|
c8c976a9
David Mayerich
replaced CImg wit...
|
507
|
return C();
|
8b7be670
David Mayerich
implemented savin...
|
508
509
|
}
|
86dfa80b
David Mayerich
added 2D gaussian...
|
510
|
size_t width() const{
|
c8c976a9
David Mayerich
replaced CImg wit...
|
511
|
return X();
|
8b7be670
David Mayerich
implemented savin...
|
512
513
|
}
|
86dfa80b
David Mayerich
added 2D gaussian...
|
514
|
size_t height() const{
|
c8c976a9
David Mayerich
replaced CImg wit...
|
515
|
return Y();
|
3d0b6243
David Mayerich
fixed hsiproc bug...
|
516
517
|
}
|
6d30a707
Tianshu Cheng
add cuda/array_ad...
|
518
|
T* data(){
|
c8c976a9
David Mayerich
replaced CImg wit...
|
519
|
return img;
|
6d30a707
Tianshu Cheng
add cuda/array_ad...
|
520
521
|
}
|
7b3948ab
David Mayerich
added support for...
|
522
|
//returns the size (number of values) of the image
|
c8c976a9
David Mayerich
replaced CImg wit...
|
523
|
size_t size(){ return C() * X() * Y(); }
|
d32a1854
David Mayerich
added framework f...
|
524
|
|
faef7718
David Mayerich
updates to stim::...
|
525
|
/// Returns the number of nonzero values
|
9d3ba0b1
David Mayerich
added stim::hsi a...
|
526
|
size_t nnz(){
|
faef7718
David Mayerich
updates to stim::...
|
527
|
|
c8c976a9
David Mayerich
replaced CImg wit...
|
528
|
size_t N = X() * Y() * C();
|
faef7718
David Mayerich
updates to stim::...
|
529
|
|
c8c976a9
David Mayerich
replaced CImg wit...
|
530
531
532
|
size_t nz = 0;
for(size_t n = 0; n < N; n++)
if(img[n] != 0) nz++;
|
faef7718
David Mayerich
updates to stim::...
|
533
|
|
c8c976a9
David Mayerich
replaced CImg wit...
|
534
|
return nz; //return the number of nonzero pixels
|
faef7718
David Mayerich
updates to stim::...
|
535
536
537
538
|
}
//this function returns indices of pixels that have nonzero values
|
9d3ba0b1
David Mayerich
added stim::hsi a...
|
539
|
std::vector<size_t> sparse_idx(){
|
faef7718
David Mayerich
updates to stim::...
|
540
|
|
c8c976a9
David Mayerich
replaced CImg wit...
|
541
|
std::vector<size_t> s; //allocate an array
|
faef7718
David Mayerich
updates to stim::...
|
542
543
|
s.resize(nnz()); //allocate space in the array
|
c8c976a9
David Mayerich
replaced CImg wit...
|
544
545
|
size_t N = size();
//size_t C = channels();
|
faef7718
David Mayerich
updates to stim::...
|
546
|
|
c8c976a9
David Mayerich
replaced CImg wit...
|
547
|
//T* ptr = img.data(); //get a pointer to the image data
|
faef7718
David Mayerich
updates to stim::...
|
548
|
|
9d3ba0b1
David Mayerich
added stim::hsi a...
|
549
|
size_t i = 0;
|
c8c976a9
David Mayerich
replaced CImg wit...
|
550
551
552
553
|
for(size_t n = 0; n < N; n++){
if(img[n] != 0){
s[i] = n;
i++;
|
faef7718
David Mayerich
updates to stim::...
|
554
555
556
557
558
|
}
}
return s; //return the index list
}
|
6d30a707
Tianshu Cheng
add cuda/array_ad...
|
559
|
|
1a224b6a
David Mayerich
fixed linux compa...
|
560
|
|
6d30a707
Tianshu Cheng
add cuda/array_ad...
|
561
|
/// Returns the maximum pixel value in the image
|
96f9b10f
Laila Saadatifard
change the header...
|
562
|
T maxv(){
|
c8c976a9
David Mayerich
replaced CImg wit...
|
563
564
|
T max_val = img[0]; //initialize the maximum value to the first one
size_t N = size(); //get the number of pixels
|
6d30a707
Tianshu Cheng
add cuda/array_ad...
|
565
|
|
c8c976a9
David Mayerich
replaced CImg wit...
|
566
|
for (size_t n=0; n<N; n++){ //for every value
|
6d30a707
Tianshu Cheng
add cuda/array_ad...
|
567
|
|
c8c976a9
David Mayerich
replaced CImg wit...
|
568
569
|
if (img[n] > max_val){ //if the value is higher than the current max
max_val = img[n];
|
1a224b6a
David Mayerich
fixed linux compa...
|
570
|
}
|
6d30a707
Tianshu Cheng
add cuda/array_ad...
|
571
|
}
|
1a224b6a
David Mayerich
fixed linux compa...
|
572
|
return max_val;
|
6d30a707
Tianshu Cheng
add cuda/array_ad...
|
573
|
}
|
d32a1854
David Mayerich
added framework f...
|
574
|
|
c8c976a9
David Mayerich
replaced CImg wit...
|
575
|
/// Returns the maximum pixel value in the image
|
96f9b10f
Laila Saadatifard
change the header...
|
576
|
T minv(){
|
c8c976a9
David Mayerich
replaced CImg wit...
|
577
578
|
T min_val = img[0]; //initialize the maximum value to the first one
size_t N = size(); //get the number of pixels
|
6d30a707
Tianshu Cheng
add cuda/array_ad...
|
579
|
|
c8c976a9
David Mayerich
replaced CImg wit...
|
580
581
582
|
for (size_t n=0; n<N; n++){ //for every value
if (img[n] < min_val){ //if the value is higher than the current max
min_val = img[n];
|
1a224b6a
David Mayerich
fixed linux compa...
|
583
|
}
|
6d30a707
Tianshu Cheng
add cuda/array_ad...
|
584
585
|
}
|
1a224b6a
David Mayerich
fixed linux compa...
|
586
|
return min_val;
|
6d30a707
Tianshu Cheng
add cuda/array_ad...
|
587
588
|
}
|
a2bf1d08
David Mayerich
general bug fixes...
|
589
590
591
592
593
594
|
/// Invert an image by calculating I1 = alpha - I0, where alpha is the maximum image value
image<T> invert(T white_val){
size_t N = size(); //calculate the total number of values in the image
image<T> r(X(), Y(), C()); //allocate space for the resulting image
for(size_t n = 0; n < N; n++)
r.img[n] = white_val - img[n]; //perform the inversion
|
1a224b6a
David Mayerich
fixed linux compa...
|
595
|
|
a2bf1d08
David Mayerich
general bug fixes...
|
596
597
|
return r; //return the inverted image
}
|
a2bf1d08
David Mayerich
general bug fixes...
|
598
|
|
3c17c706
David Mayerich
added a crop func...
|
599
600
601
602
603
604
605
606
607
608
609
610
611
612
|
image<T> crop(size_t x0, size_t y0, size_t w, size_t h){
image<T> result(w, h, C()); //create the output cropped image
size_t srci;
size_t dsti;
size_t line_bytes = w * C(); //calculate the number of bytes in a line
for (size_t yi = 0; yi < h; yi++) { //for each row in the cropped image
srci = (y0 + yi) * X() * C() + x0 * C(); //calculate the source index
dsti = yi * w * C(); //calculate the destination index
memcpy(&result.img[dsti], &img[srci], line_bytes); //copy the data
}
return result;
}
|
e702aa4e
David Mayerich
implemented array...
|
613
|
//crop regions given by an array of 1D index values
|
276f9b23
David Mayerich
forced matching t...
|
614
|
std::vector< image<T> > crop_idx(size_t w, size_t h, std::vector<size_t> idx) {
|
0012d210
David Mayerich
fixed compiler er...
|
615
|
std::vector< image<T> > result(idx.size()); //create an array of image files to return
|
e702aa4e
David Mayerich
implemented array...
|
616
617
618
619
620
621
622
623
624
625
|
for (size_t i = 0; i < idx.size(); i++) { //for each specified index point
size_t y = idx[i] / X(); //calculate the y coordinate from the 1D index (center of ROI)
size_t x = idx[i] - y * X(); //calculate the x coordinate (center of ROI)
y -= w / 2; //update x and y values to reflect the lower corner of the ROI
x -= h / 2;
result[i] = crop(x, y, w, h); //get the cropped image and store it in the result array
}
return result;
}
|
66304f4f
David Mayerich
added an addition...
|
626
627
628
629
630
631
632
633
634
|
//operator functions
image<T> operator+(image<T> rhs) {
size_t N = size(); //calculate the total number of values in the image
image<T> r(X(), Y(), C()); //allocate space for the resulting image
for (size_t n = 0; n < N; n++)
r.img[n] = img[n] + rhs.img[n]; //perform the inversion
return r; //return the inverted image
}
|
6d30a707
Tianshu Cheng
add cuda/array_ad...
|
635
|
image<T> srgb2lab(){
|
c8c976a9
David Mayerich
replaced CImg wit...
|
636
637
|
std::cout<<"ERROR stim::image::srgb2lab - function has been broken, re-implement."<<std::endl;
exit(1);
|
6d30a707
Tianshu Cheng
add cuda/array_ad...
|
638
639
640
|
}
image<T> convolve2(image<T> mask){
|
c8c976a9
David Mayerich
replaced CImg wit...
|
641
642
|
std::cout<<"ERROR stim::image::convolve2 - function has been broken, and shouldn't really be in here."<<std::endl;
exit(1);
|
6d30a707
Tianshu Cheng
add cuda/array_ad...
|
643
|
}
|
d32a1854
David Mayerich
added framework f...
|
644
645
|
|
f186dbda
Tianshu Cheng
header file for b...
|
646
|
image<T> rotate(float angle, float cx, float cy){
|
c8c976a9
David Mayerich
replaced CImg wit...
|
647
648
|
std::cout<<"ERROR stim::image::rotate - function has been broken, and shouldn't really be in here."<<std::endl;
exit(1);
|
f186dbda
Tianshu Cheng
header file for b...
|
649
|
}
|
945ee13c
Laila Saadatifard
the get_list func...
|
650
|
|
945ee13c
Laila Saadatifard
the get_list func...
|
651
652
|
// leila's code for non_interleaving data in 3D
//create an data set from an interleaved buffer
|
9d3ba0b1
David Mayerich
added stim::hsi a...
|
653
|
void set_interleaved3(T* buffer, size_t width, size_t height, size_t depth, size_t channels = 3){
|
c8c976a9
David Mayerich
replaced CImg wit...
|
654
655
|
std::cout<<"ERROR stim::image::set_interleaved3 - stim::image no longer supports 3D images."<<std::endl;
exit(1);
|
945ee13c
Laila Saadatifard
the get_list func...
|
656
|
}
|
1a224b6a
David Mayerich
fixed linux compa...
|
657
|
|
dbeb83f2
David Mayerich
added separable c...
|
658
|
/// Casting operator, casts every value in an image to a different data type V
|
2e5e3a26
David Mayerich
added 2D convolut...
|
659
660
|
template<typename V>
operator image<V>() {
|
dbeb83f2
David Mayerich
added separable c...
|
661
662
663
|
image<V> r(X(), Y(), C()); //create a new image
std::copy(img, img + size(), r.data()); //copy and cast the data
return r; //return the new image
|
2e5e3a26
David Mayerich
added 2D convolut...
|
664
665
|
}
|
d32a1854
David Mayerich
added framework f...
|
666
667
|
};
|
7b3948ab
David Mayerich
added support for...
|
668
669
|
}; //end namespace stim
|
d32a1854
David Mayerich
added framework f...
|
670
671
|
#endif
|