image.c

#include "image.h"

void loadImage(const IplImage* img, const char *filename){
    img = cvLoadImage(filename, 1);
    if (!img) {
        printf("Could not load image file");
        exit(0);
    }
}
/*void getDataImage(const IplImage* img, int* height, int* width, int* step, int* channels, uchar* data ){
    height = getHeight(img);
    width = getWidth(img);
    step = getStep(img);
    channels = getChannels(img);
    data = (uchar *) img->imageData;
}*/

/**
 * @return height of a image
 */
int getHeight(IplImage* img){
    return img->height;
}

/**
 * @return @width of an image
 */
int getWidth(IplImage* img){
    return img->width;
}

/**
 * @return the steps to traverse using width
 */
int getStep(IplImage* img){
    return img->widthStep;
}

/**
 * return number of channel in a image
 */
int getChannels(IplImage* img){
    return img->nChannels;
}

/**
 * Show an image in the screen
 */
void showImage(IplImage* img){
    //create the window
    cvNamedWindow("ImageWindow", CV_WINDOW_AUTOSIZE);
    cvMoveWindow("ImageWindow", 100, 100);

    // show the image
    cvShowImage("ImageWindow", img );

    // wait for a key
    cvWaitKey(0);

    // release the image
    cvReleaseImage(&img );
}

CvScalar* getIntensityPixel(IplImage* img){
    int count = 0;
    int size = img->height * img->width;
    CvScalar *pixel = malloc(size * sizeof(CvScalar));
    for (int row = 0; row < img->height; row++){
        for (int col = 0; col < img->width; col++){
            pixel[count] = cvGet2D(img, row, col);
            count++;
        }

    }
    return pixel;
}
double *redIntensity(IplImage* img){
    int size = img->height*img->width;
    double* red = malloc(size * sizeof(double));
    CvScalar *pixel = malloc(size * sizeof(CvScalar));
    pixel = getIntensityPixel(img);
    for(int i = 0; i < size; i++){
        red[i] = pixel->val[2];
    }
    return red;
}

//to red, to 1 bit
double *bits(IplImage* img){
    int size = img->height*img->width;
    double *message = malloc(size * sizeof(int));
    double *color = redIntensity(img);
    int aux;
    for (int i = 0; i < size; i++){
        for (int j = 7; j > 0 ;j-- ) {
            aux = get_bit(color[i], 8);
            message[i] = message[i] + (aux * pow(2,j));
        }
    }
    return message;
}