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img-par.cpp
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img-par.cpp
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#include <dirent.h>
#include <iostream>
#include <cstring>
#include <filesystem>
#include <functional>
#include <omp.h>
using namespace std;
using namespace std::chrono;
using clk = chrono::high_resolution_clock;
namespace fs = std::filesystem;
void applyFilter(string inFile, string outFile, string operation){
auto t1_Load = clk::now();
FILE* f;
if(fopen(inFile.c_str(), "rb") == nullptr){
cout << "File could not be opened" << endl;
}
f = fopen(inFile.c_str(),"rb");
unsigned char header[54];
int read;
read = fread(header, sizeof(unsigned char), 54, f);
uint16_t nplano = *(int*)&header[26]; // uint16 -> 2 Bytes
uint16_t spunto = *(int*)&header[28];
uint32_t vcompresion = *(int*)&header[30]; // uint32 -> 4 Bytes
if(nplano !=1){
cerr << "Wrong format of BMP image. Number of color planes should be 1." << endl;
}
if(spunto!=24){
cerr << "Wrong format of BMP image. Point size should be 24." << endl;
}
if(vcompresion !=0){
cerr << "Wrong format of BMP image. Compression type should be 0." << endl;
}
// Extract image height and width from header
int width = *(int*)&header[18];
int height = *(int*)&header[22];
int startInfo = *(int*)&header[10];
int imageSize = *(uint32_t*)&header[34];
int padding = (imageSize - width*height*3)/height;
unsigned char *infoBeforePixels = new unsigned char[startInfo-54];
read = fread(infoBeforePixels, sizeof(unsigned char), startInfo-54, f);
unsigned char *pixelsData = new unsigned char[imageSize];
read = fread(pixelsData, sizeof(unsigned char), imageSize, f);
if (read != imageSize){
cout << "Read error" << endl;
}
fclose(f);
unsigned char **blue_array = new unsigned char *[height+4];
unsigned char **green_array = new unsigned char *[height+4];
unsigned char **red_array = new unsigned char *[height+4];
for(int i=0; i<(height+4);i++){
blue_array[i] = new unsigned char[width+4];
green_array[i] = new unsigned char[width+4];
red_array[i] = new unsigned char[width+4];
}
int indice = 0;
for(int i= 2; i < height+2;i++){
if (i>2){
indice = indice + padding;
}
for(int j=2; j<width+2; j++){
*(*(blue_array+i)+j) = pixelsData[indice];
*(*(green_array+i)+j) = pixelsData[indice+1];
*(*(red_array+i)+j) = pixelsData[indice+2];
indice = indice+3;
}
}
auto t2_Load = clk::now();
auto diff_Load = duration_cast<microseconds>(t2_Load - t1_Load);
double secsLoad = (double) (diff_Load.count());
double totalTime = secsLoad;
/*-------LOAD FINISHED------*/
// Do the filters (if any):
double secsGauss, secsSobel;
if(operation.compare("gauss")==0 || operation.compare("sobel")==0){ //----Gauss filter----
auto t1_Gauss = clk::now();
int w = 273;
int masc[5][5] = {{1,4,7,4,1},{4,16,26,16,4},{7,26,41,26,7},{4,16,26,16,4},{1,4,7,4,1}};
int new_blue = 0, new_green=0, new_red=0;
for(int i=1; i<height+1; i++){
for(int j=1; j<width+1; j++){
for(int s=0; s<=4; s++){
for(int t=0; t<=4; t++){
new_blue = new_blue + (masc[s][t]) * (*(*(blue_array + i + s - 1) + (j+t-1)));
new_green = new_green + (masc[s][t]) * (*(*(green_array + i + s - 1) + (j+t-1)));
new_red = new_red + (masc[s][t]) * (*(*(red_array + i + s - 1) + (j+t-1)));
}
}
new_blue = new_blue / w;
new_green = new_green / w;
new_red = new_red/ w;
*(*(blue_array+i)+j) = (unsigned char) (new_blue);
*(*(green_array+i)+j) = (unsigned char) (new_green);
*(*(red_array+i)+j) = (unsigned char) (new_red);
new_blue = new_green = new_red = 0;
}
}
auto t2_Gauss = clk::now();
auto diff_Gauss = duration_cast<microseconds>(t2_Gauss - t1_Gauss);
secsGauss = (double) (diff_Gauss.count());
totalTime = totalTime + secsGauss;
if (operation.compare("sobel")==0){
auto t1_Sobel = clk::now();
w = 8;
int m_x[3][3] = {{1,2,1},{0,0,0},{-1,-2,-1}};
int m_y[3][3] = {{-1,0,1},{-2,0,2},{-1,0,1}};
int new_blueX = 0, new_greenX=0, new_redX=0;
int new_blueY = 0, new_greenY=0, new_redY=0;
for(int i=1; i<height+1; i++){
for(int j=1; j<width+1; j++){
for(int s=0; s<=2; s++){
for(int t=0; t<=2; t++){
new_blueX += (m_x[s][t]) * (*(*(blue_array + i + s ) + (j+t)));
new_greenX += (m_x[s][t]) * (*(*(green_array + i + s ) + (j+t)));
new_redX += (m_x[s][t]) * (*(*(red_array + i + s ) + (j+t)));
new_blueY += (m_y[s][t]) * (*(*(blue_array + i + s ) + (j+t)));
new_greenY += (m_y[s][t]) * (*(*(green_array + i + s ) + (j+t)));
new_redY += (m_y[s][t]) * (*(*(red_array + i + s ) + (j+t)));
}
}
int sumBlue = (abs(new_blueX)+abs(new_blueY)) / w;
int sumGreen = (abs(new_greenX)+abs(new_greenY)) / w;
int sumRed = (abs(new_redX)+abs(new_redY)) / w;
*(*(blue_array+i)+j) = (unsigned char) (sumBlue);
*(*(green_array+i)+j) = (unsigned char) (sumGreen);
*(*(red_array+i)+j) = (unsigned char) (sumRed);
new_blueX = new_greenX = new_redX = 0;
new_blueY = new_greenY = new_redY = 0;
}
}
auto t2_Sobel = clk::now();
auto diff_Sobel = duration_cast<microseconds>(t2_Sobel - t1_Sobel);
secsSobel = (double) (diff_Sobel.count());
totalTime = totalTime + secsSobel;
}
}
/*------OPERATIONS AND FILTERS FINISHED------*/
//Starting to write the new file:
auto t1_Store=clk::now();
indice = 0;
for(int i= 0; i < height;i++){ // Write the new colors of the pixels
if (i>0){
indice = indice + padding;
}
for(int j=0; j<width; j++){
pixelsData[indice] = *(*(blue_array+i+1)+(j+1));
pixelsData[indice + 1] = *(*(green_array+i+1)+(j+1));
pixelsData[indice + 2] = *(*(red_array+i+1)+(j+1));
indice = indice+3;
}
}
//New header:
int fileSize = 54 + imageSize;
header[2] = fileSize%256;
header[3] = (fileSize/256)%256;
header[4] = (fileSize/65536)%256;
header[5] = fileSize/16777216;
header[6] = (uint32_t) 0;
//Write the new header
header [10] = 54;
header[14] = 40;
header[15] = header[16] = header[17] = 0;
header[11] = header[12] = header[13] = 0;
header[38] = 19;
header[39] = 11;
header[42] = 19;
header[43] = 11;
header[40] = 0;
header[41] = 0;
header[42] = 0;
header[43] = 0;
header[44] = 0;
header[45] = 0;
FILE* output = fopen(outFile.c_str(), "wb");
fseek(output, 0, SEEK_SET);
fwrite(header,sizeof(unsigned char), 54, output);
fwrite(pixelsData, sizeof(unsigned char), imageSize, output);
fclose(output);
auto t2_Store = clk::now();
auto diff_Store = duration_cast<microseconds>(t2_Store - t1_Store);
double secsStore = (double) (diff_Store.count());
totalTime = totalTime + secsStore;
/*------------WRITE FINISHED-----------*/
//------------Printing the time----------
cout << " (time: " << totalTime << ")" << endl;
cout << " Load time: " << secsLoad << endl;
if(strcmp(operation.c_str(), "gauss")==0){
cout << " Gauss: " << secsGauss << endl;
}else if(strcmp(operation.c_str(), "sobel")==0){
cout << " Gauss: " << secsGauss << endl;
cout << " Sobel: " << secsSobel << endl;
}
cout << " Store time: " << secsStore << endl;
}
int main(int nargs, char *args[]){
if(nargs != 4){ // 4 arguments necessary. P.ej.---> ./image-seq gauss indir outdir
cerr<<"Wrong format:"<<endl;
cerr<<"image-seq operation in_path out_path;" <<endl;
cerr<<"operation: copy, gauss, sobel"<<endl;
return -1;
}
//Paths
DIR *dir_in; dir_in = opendir(args[2]); // pointer to input directory
DIR *dir_out; dir_out = opendir(args[3]); //pointer to output directory
if(strcmp(args[1], "gauss")!=0 && strcmp(args[1], "copy")!=0 && strcmp(args[1], "sobel")!=0){ //Operación inválida
cerr<<"Unexpected operation: " << args[1] <<endl;
cerr<<"image-seq operation in_path out_path;" <<endl;
cerr<<"operation: copy, gauss, sobel"<<endl;
return -1;
}
if(!dir_in){
cerr<<"Input path: " << args[2] <<endl;
cerr<<"Output path: " << args[3] <<endl;
cerr<<"Cannot open directory " <<args[2]<<endl;
cerr<<"image-seq operation in_path out_path;" <<endl;
cerr<<"operation: copy, gauss, sobel"<<endl;
return -1;
}
if(!dir_out){
cerr<<"Input path: " << args[2] <<endl;
cerr<<"Output path: " << args[3] <<endl;
cerr<<"Output directory " <<args[3] << " does not exist "<<endl;
cerr<<"image-seq operation in_path out_path;" <<endl;
cerr<<"operation: copy, gauss, sobel"<<endl;
return -1;
}
cout << "Input path: " << args[2] << endl;
cout << "Output path: " << args[3] << endl;
string operation = args[1];
string dir_in_str = args[2];
string dir_out_str = args[3];
string filePathOrigin = dir_in_str + "/";
for (const auto &entry : fs::directory_iterator(filePathOrigin)){
filePathOrigin = entry.path().string();
cout << "File: " << filePathOrigin;
int pos = filePathOrigin.find("/");
string filePathDestiny = dir_out_str + "/" + filePathOrigin.substr(pos+1);
applyFilter(filePathOrigin, filePathDestiny, operation);
}
return 0;
}