OpenCV 根据像素值调整图像大小和裁剪图像

#include "iostream"
#include "cv.h"
#include "highgui.h"
#include "cvaux.h"
#include "cxmisc.h"
#include "math.h"

using namespace cv;
using namespace std;

int main(){

int height, width, x, y, i, minX, minY, maxX, maxY;
char imgFileName[100];


IplImage *origImage = cvLoadImage("BaybayinMark/b9.jpg", -1);
height = origImage->height;
width = origImage->width;

IplImage *grayImage = cvCreateImage(cvSize(width, height), 8, 1);
IplImage *binImage = cvCreateImage(cvSize(width, height), 8, 1);


//Pre-processing phase


cvCvtColor(origImage, grayImage, CV_BGR2GRAY);
cvDilate(grayImage, grayImage, NULL, 1);
cvSmooth(grayImage, grayImage, CV_GAUSSIAN, 21, 21, 0, 0);
cvThreshold(grayImage, binImage, 120, 255, CV_THRESH_BINARY);
cvNormalize(binImage,binImage,0,1,CV_MINMAX);

minX = width;
minY = height;
maxX = 0;
maxY = 0;


CvScalar s;


for (x=0; x<width-1; x++){
for(y=0; y<height-1; y++){
    s = cvGet2D(binImage, y, x);
    //printf("%f\n", s.val[0]);
    if (s.val[0] == 1){
        //printf("HELLO");
        minX = min(minX, x);
        minY = min(minY, y);
        maxX = max(maxX, x);
        maxY = max(maxY, y);

    }   
}
}

cvSetImageROI(binImage, cvRect(minX, minY, maxX-minX, maxY-minY));

IplImage *cropImage = cvCreateImage(cvGetSize(binImage), 8, 1);

cvCopy(binImage, cropImage, NULL);

cvSaveImage("crop/cropImage9.jpg", cropImage);
cvResetImageROI(binImage);

cvReleaseImage(&origImage);
cvReleaseImage(&binImage);

cvReleaseImage(&grayImage);
cvReleaseImage(&cropImage);

}

你好！我只是想问一下这段代码。我正在尝试识别图像的最外边缘并根据它们裁剪图像。运行后我所看到的只是一张大小相同的黑色图像。我是否尝试以错误的方式做这件事？请赐教，我是 OpenCV 的初学者。

在匆忙的寻找中what-这就是问题所在