#include?
#include?

int?main（）
{
double?minVal=0.0?maxVal=0.0;
double?scale?shift;
double?min=0?max=255;

char?*?fileName?=“pic3.png“;
IplImage?*?inputImage?=?cvLoadImage（fileName?）;
IplImage?*grayImage?=cvCreateImage
（cvGetSize（inputImage）IPL_DEPTH_8U?1）;
IplImage?*sobelImage16?=cvCreateImage
（cvGetSize（inputImage）IPL_DEPTH_16S?1）;
IplImage?*sobelImage8?=cvCreateImage
（cvGetSize（inputImage）IPL_DEPTH_8U?1）;
IplImage?*cannyImage?=cvCreateImage
（cvGetSize（inputImage）IPL_DEPTH_8U?1）;

/*?origin?（start）?of?image?must?be?the?same?*/
grayImage->origin?=?inputImage->origin;
sobelImage16->origin?=?inputImage->origin;
sobelImage8->origin?=?inputImage->origin;


cvCvtColor?（inputImagegrayImageCV_BGR2GRAY）;

cvNamedWindow（?“Grayscale“?1）;
cvShowImage（?“Grayscale“?gra