Hi all
i am tried to make better the rgb colors for a live video camara, i follow this tutorial
http://dasl.mem.drexel.edu/~noahKuntz/openCVTut5.html
in the part for histogram equialization, i make for a ofxCvColorImage
and for thake each color for separated i used the class for a syllabus 09
This for set pixels into array
void testApp::ourSetPixel(int horizontal,int vertical,unsigned char R,unsigned char G,unsigned char B,int w, unsigned char pixels[]){
int thisPixel;
thisPixel = 3*(w * vertical +horizontal);
pixels[thisPixel]=R;
pixels[thisPixel+1]=G;
pixels[thisPixel+2]=B;
}
This for get pixels for an image
void testApp::ourGetPixel(int horizontal,int vertical,unsigned char* R,unsigned char* G,unsigned char* B,int w, unsigned char pixels[]){
int thisPixel;
thisPixel = 3*(w * vertical +horizontal);
*R= pixels[thisPixel];
*G= pixels[thisPixel+1];
*B= pixels[thisPixel+2];
and in the part for use cvEcualizeList i used this
void testApp::ourProcessImage(){
unsigned char R,G,B, R2,G2, B2;
int cell = 1 , threshold= mouseX;
for (int y = cell; y < height-cell; y++) { //visit all pixels, make sure not to go under 0 or over width and height...
for (int x = cell; x < width-cell; x++) { // that's why w start at cell and go to width-cell
ourGetPixel(x,y,&R,&G,&B,width,ourImagePixels); // get the RGB of the pixel
int sum =0; // for every pixel, sum will add up all the change of the neighborhood
for (int cellY= y-cell; cellY<=y+cell; cellY++){ // go into a repeat loop of cell x cell around the pixel
for (int cellX= x-cell; cellX<=x+cell; cellX++){
ourGetPixel(cellX,cellY,&R2,&G2,&B2,width,ourImagePixels); // our method that gets RGBs values at x,y position, note that it expects pointers for R,G,B
int diference= sqrt((R-R2)*(R-R2)+(G-G2)*(G-G2)+(B-B2)*(B-B2));
sum+= diference; // accumulate all the change of the neighborhood into sum
}
}
if (sum< threshold){ // if there is less change than we difine as threshold...
// ourSetPixel(x,y,255,255,255,width,ourResultPixels); // set the pixel white...
ourSetPixel(x,y,R,G,B,width,ourResultPixels); // set the pixel its original colors...
}else{
ourSetPixel(x,y,0,0,0,width,ourResultPixels); //otherwise set it black
}
}
}
}
but i used this with the CvEquilizateHist and really make better the final result
but my question is if exit a way for make this more fast, this is so much slowly, and in some parts the program closed for memory :S… anuone can give me a hand, really this is a dummy application but i want to take the r and gand B color for a live video and maybe the alpha for a video . mov and make some thing with each for separate…
thx 