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filtros.c
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filtros.c
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#include "filtros.h"
#include <stdio.h>
#include <stdlib.h>
// intel simd
#if defined(__SSE2__)
#include <emmintrin.h>
#endif
#define min(a,b) (((a) < (b)) ? (a) : (b))
#define max(a,b) (((a) > (b)) ? (a) : (b))
FILTRO SEPIA = {
.393, .760, .189,
.349, .686, .168,
.272, .534, .131
};
extern unsigned char multiplyBlend(unsigned char valorColor1,unsigned char valorColor2);
extern void xmmBlend(char * datos1, char * datos2, int cantPixels);
/******************************************************************************/
void filtro (BMPDATA *bmpData, FILTRO filtro) {
for (int i=0; i<cantPixels(bmpData); i++) {
unsigned char r = bmpData->red[i];
unsigned char g = bmpData->green[i];
unsigned char b = bmpData->blue[i];
bmpData->red[i] = min (r * filtro.RR + g * filtro.RG + b * filtro.RB, 255);
bmpData->green[i] = min (r * filtro.GR + g * filtro.GG + b * filtro.GB, 255);
bmpData->blue[i] = min (r * filtro.BR + g * filtro.BG + b * filtro.BB, 255);
}
}
/******************************************************************************/
void blancoYNegro (BMPDATA *bmpData) {
for (int i=0; i<cantPixels(bmpData); i++) {
unsigned char y = bmpData->red[i] * 0.11448f + bmpData->green[i] * 0.58661f + bmpData->blue[i] * 0.29891f;
bmpData->red[i] = y;
bmpData->green[i] = y;
bmpData->blue[i] = y;
}
}
/*******************************************************************************/
void medianFilter(BMPDATA *bmpData){
//param nDeNxN
int N= bmpData->infoHeader.biWidth;
int M= bmpData->infoHeader.biHeight;
//int sizeWindow= nDeNxN*nDeNxN;
int sizeWindow=9;
int mitadWindow= (int)(sizeWindow/2);
//Movemos a traves de la imagen
for(int m=1; m< M-1;m++){
for(int n=1;n<N-1;n++){
//Elegimos elementos de las ventanas
int k=0;
unsigned char RWindow[sizeWindow];
unsigned char GWindow[sizeWindow];
unsigned char BWindow[sizeWindow];
for(int j=m-1; j< m+2; j++){
for(int i=n-1; i< n+2; i++){
RWindow[k]=bmpData->red[(j*N)+i];
GWindow[k]=bmpData->green[(j*N)+i];
BWindow[k]=bmpData->blue[(j*N)+i];
k++;
}
}
//ORDENO Y REEMPLAZO LOS ROJOS
for(int j=0;j < sizeWindow;j++){
//Encontrar posicion del minimo elemento
int min= j;
for(int l=j+1; l<sizeWindow;l++){
if(RWindow[l]<RWindow[min]){
min=l;
}
}
//SWAP ROJO
const unsigned char Rtemp= RWindow[j];
RWindow[j]=RWindow[min];
RWindow[min]=Rtemp;
}
bmpData->red[(m-1)*N+(n-1)]= RWindow[4];
//ORDENO LOS VERDES
for(int j=0;j < mitadWindow+1;j++){
//Encontrar posicion del minimo elemento
int min=j;
for(int l=j+1; l<sizeWindow;l++){
if(GWindow[l]<GWindow[min]){
min=l;
}
}
//SWAP VERDE
const unsigned char Gtemp=GWindow[j];
GWindow[j]=GWindow[min];
GWindow[min]=Gtemp;
}
bmpData->green[(m-1)*N+(n-1)]= GWindow[4];
//ORDENO LOS AZULES
for(int j=0;j < mitadWindow+1;j++){
//Encontrar posicion del minimo elemento
int min=j;
for(int l=j+1; l<sizeWindow;l++){
if(BWindow[l]<BWindow[min]){
min=l;
}
}
//SAWP AZUL
const unsigned char Btemp=BWindow[j];
BWindow[j]=BWindow[min];
BWindow[min]=Btemp;
}
bmpData->blue[(m-1)*N+(n-1)]=BWindow[4];
}
}
}
/*******************************************************************************/
void aclarar(BMPDATA *bmpData, long brillo){
//Para que se respete el rango -255 a 255
//Si el valor es menor a 0 se oscurece la imagen, caso contrario, se aclara
brillo= max(0,min(255,brillo));
for (int i=0; i<cantPixels(bmpData);i++){
unsigned char r= bmpData->red[i];
unsigned char g = bmpData->green[i];
unsigned char b = bmpData->blue[i];
bmpData->red[i] = max(0,min(r+brillo,255)); //max y min para ir verificando los rangos
bmpData->green[i] = max(0,min(g+brillo,255));
bmpData->blue[i] = max(0,min(b+brillo,255));
}
}
/*******************************************************************************/
void negativo(BMPDATA *bmpData){
//Consta en invertir los colores
for(int i=0;i<cantPixels(bmpData);i++){
bmpData->red[i]=min(bmpData->red[i]*(-1),255); //Para mantener rango de valores
bmpData->green[i]=min(bmpData->green[i]*(-1),255);
bmpData->blue[i]=min(bmpData->blue[i]*(-1),255);
}
}
/************************************************************************************************/
void blend(BMPDATA *bmpData, BMPDATA *bmpData2) {
//Se presupone que ambas imagenes son del mismo tamaño
int numeroPixeles1=cantPixels(bmpData);
int numeroPixeles2=cantPixels(bmpData2);
if(numeroPixeles1!=numeroPixeles2){
printf("Las imagenes son de distinto tamaño!\n");
}
else{
for (int i=0; i<cantPixels(bmpData); i++) { //Blending images
bmpData->red[i]=multiplyBlend(bmpData->red[i],bmpData2->red[i]);
bmpData->green[i]=multiplyBlend(bmpData->green[i],bmpData2->green[i]);
bmpData->blue[i]=multiplyBlend(bmpData->blue[i],bmpData2->blue[i]);
}
}
}
/******************************************************************************/
/******************************************************************************/
void blendASM(BMPDATA *bmpData, BMPDATA *bmpData2) {
//Se presupone que ambas imagenes son del mismo tamaño
int numeroPixeles1=cantPixels(bmpData);
int numeroPixeles2=cantPixels(bmpData2);
if(numeroPixeles1!=numeroPixeles2){
printf("Las imagenes son de distinto tamaño!\n");
}
else{
unsigned char * RWindowImagen1= malloc(numeroPixeles1 * sizeof(int)); //asigna determinados bytes de tamaño de almacenamiento no inicializado.
unsigned char * GWindowImagen1= malloc(numeroPixeles1 * sizeof(int));
unsigned char * BWindowImagen1= malloc(numeroPixeles1 * sizeof(int));
unsigned char * RWindowImagen2= malloc(numeroPixeles1 * sizeof(int));
unsigned char * GWindowImagen2= malloc(numeroPixeles1 * sizeof(int));
unsigned char * BWindowImagen2= malloc(numeroPixeles1 * sizeof(int));
//unsigned char * Divisor = malloc(numeroPixeles1);
for(int i=0; i<numeroPixeles1;i++){ //Filling up each color windows
RWindowImagen1[i]=bmpData->red[i];
GWindowImagen1[i]=bmpData->green[i];
BWindowImagen1[i]=bmpData->blue[i];
RWindowImagen2[i]=bmpData2->red[i];
GWindowImagen2[i]=bmpData2->green[i];
BWindowImagen2[i]=bmpData2->blue[i];
}
xmmBlend(RWindowImagen1,RWindowImagen2,numeroPixeles1);
bmpData2->red=RWindowImagen1;
xmmBlend(GWindowImagen1,GWindowImagen2,numeroPixeles1);
bmpData2->green=GWindowImagen1;
xmmBlend(BWindowImagen1,BWindowImagen2,numeroPixeles1);
bmpData2->blue=BWindowImagen1;
}
}
/******************************************************************************/
unsigned char mediana (unsigned char *histo, int imediana) {
int k, aux=0;
for (k=0; k<255 && aux<=imediana; k++)
aux += histo[k];
return k;
}
/******************************************************************************/
int cantPixels(BMPDATA *bmpData) {
return bmpData->infoHeader.biWidth * bmpData->infoHeader.biHeight;
}
/******************************************************************************/