Estrazione componenti rgb

[Armaneddon]

Codice:

Espandi/Riduci

#include<stdio.h> #include<malloc.h> int rows=512,cols=512; unsigned char **img1,**imgR,**imgG,**imgB; unsigned char** allocabuffer(int r, int c); void eliminabuffer(unsigned char **buffer,int r); void readraw(char *filepath,unsigned char **buffer); void readrawR(char *filepath,unsigned char **buffer); void readrawG(char *filepath,unsigned char **buffer); void readrawB(char *filepath,unsigned char **buffer); void saveraw(char *filepath,unsigned char **buffer); FILE *out; main() {    int i;         imgR=allocabuffer(rows, cols);            readrawR("C:\\Documents and Settings\\Paolo L\\Desktop\\EIV\\img.raw",imgR);     saveraw("C:\\Documents and Settings\\Paolo L\\Desktop\\EIV\\img_R.raw",imgR);     eliminabuffer(imgR,rows);    } unsigned char** allocabuffer(int r, int c) {    int i;    unsigned char **buffer=(unsigned char**)malloc(r*sizeof(unsigned char*));    for(i=0;i<r;i++)       buffer[i]=(unsigned char*)calloc(3*c,sizeof(unsigned char));    return (buffer); } // readraw RGB void readrawR(char *filepath,unsigned char **buffer) {    int i;    out=fopen(filepath,"rb");    for(i=0;i<rows*cols*3;i=i+3) fread(buffer[i],1,1,out);    fclose(out); } void readrawG(char *filepath,unsigned char **buffer) {    int i;    FILE *source=fopen(filepath,"rb");    for(i=1;i<rows;i=i+3) fread(buffer[i],1,cols,source);    fclose(source); } void readrawB(char *filepath,unsigned char **buffer) {    int i;    FILE *source=fopen(filepath,"rb");    for(i=2;i<rows;i=i+3) fread(buffer[i],1,cols,source);    fclose(source); } void eliminabuffer(unsigned char **buffer,int r) {    int i;    for(i=0;i<r;i++) free(buffer[i]);    free(buffer); } void saveraw(char *filepath,unsigned char **buffer) {    int i;    FILE *source=fopen(filepath,"wb");    for(i=0;i<rows;i++) fwrite(buffer[i],1,1,source);    fclose(source); }

Salve, avrei bisogno di un aiuto, dovrei creare un codice c che mi permetta di estrarre da un immagine raw che ho sul computer (sequenza di pixel rgb rgb rgb...) le componenti r, g e b e di salvarle in 3 buffer diversi per poi estrarre la componente y... ho provato a implementare questo codice ma c'è qualcosa che non torna perchè non mi restituisce un immagine a livelli di grigio per le sole componenti r... cosa sto sbagliando?[/code]