画像を読み込む関数を自作し、読み込めているかOpenCVで出力することで確認せよ。

画像

#include <iostream>
#include <cstdio>
#include <cstdlib>

#include <cv.h>
#include <highgui.h>

using namespace std;

/*****[画像用構造体]*****/
struct Image {
unsigned long sizeX;
unsigned long sizeY;
char *data;
};
typedef struct Image Image;


/****[画像データセット関数]**************/
int ImageLoad(char *filename, Image *image)
{
FILE *file;
unsigned long size;
unsigned long i;
unsigned short int planes;
unsigned short int bpp;

char temp;


if *1==NULL)
{
printf("File Not Found : %s\n",filename);
return 0;
}

fseek(file, 18, SEEK_CUR);


if *2 != 1) {
printf("Error reading width from %s.\n", filename);
return 0;
}


if *3 != 1) {
printf("Error reading height from %s.\n", filename);
return 0;
}

size = image->sizeX * image->sizeY * 3;

if *4 != 1) {
printf("Error reading planes from %s.\n", filename);
return 0;
}
if (planes != 1) {
printf("Planes from %s is not 1: %u\n", filename, planes);
return 0;
}

if *5 != 1) {
printf("Error reading bpp from %s.\n", filename);
return 0;
}
if (bpp != 24) {
printf("Bpp from %s is not 24: %u\n", filename, bpp);
return 0;
}

fseek(file, 24, SEEK_CUR);

image->data = (char *) malloc(size);
if (image->data == NULL) {
printf("Error allocating memory for color-corrected image data");
return 0;
}

if *6 != 1) {
printf("Error reading image data from %s.\n", filename);
return 0;
}

for (i=0;i<size;i+=3) {
temp = image->data[i];
image->data[i] = image->data[i+2];
image->data[i+2] = temp;
}

return 1;
}


/*****[画像読み込み準備]******************/
IplImage *imgA;
CvSize window_size;

void LoadImage()
{

Image *image1;

image1 = (Image *) malloc(sizeof(Image));
if (image1 == NULL) {
printf("Error allocating space for image");
std::exit(0);
}

if (!ImageLoad("test2.bmp", image1)) { //ここで、「画像ファイル」を指定する
std::exit(1);
}

/*OpenCVにデータをわたす*/
window_size.width = image1->sizeX;
window_size.height= image1->sizeY;
imgA = cvCreateImage(window_size,IPL_DEPTH_8U,3);
imgA->imageData = image1->data;

free(image1);

cvCvtColor(imgA, imgA, CV_RGB2BGR);
cvFlip(imgA,NULL,0);

}




int main( int argc, char **argv)
{

/* 自作関数で読み込み */

LoadImage();
cvNamedWindow("MY FUNCTION",CV_WINDOW_AUTOSIZE);
cvShowImage("MY FUNCTION",imgA);


/*OpenCV で読み込み*/
IplImage *imgB = cvLoadImage( "test2.bmp", CV_LOAD_IMAGE_ANYDEPTH | CV_LOAD_IMAGE_ANYCOLOR);
if(imgB ==NULL)
{
cout<<"Can't Load Image ." << endl;
std::exit(0);
}
cvNamedWindow("OpenCV FUNC",CV_WINDOW_AUTOSIZE);
cvShowImage("OpenCV FUNC",imgB);



cvWaitKey(0);


free(imgA->imageData);
cvReleaseImage( & imgA);
cvReleaseImage( & imgB);
cvDestroyAllWindows();

return 0;
}